Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
Building Permit #271 - Exception 10/5/2001
V Wright-Pierce C December 7, 2001 W-P Project No. 6960E U Mr. D. Robert Nicetta Building Commissioner Town of North Andover Li 27 Charles Street North Andover, MA 01845 Serial Letter No. 01-15 C Subject: g Buildin ubject: Permit No. 271 Response to Fire Department Comments Dated October 5, 2001 Reference: Biosolids Drying and Pelletizing Facility, Contract 2 n Dear Bob: On behalf of the Greater Lawrence Sanitary District, NEFCO, and H.E. Sargent, we have prepared the following response package to the comments of the North Andover Fire Department prepared by their fire protection specialist, Pyrotech. The comments were submitted in an n October 5, 2001 correspondence from Pyrotech. We subsequently met with the representatives Lof the North Andover Fire Department and Pyrotech on October 10, 2001. The following responses use the numeration of the comments in the October 5, 2001 correspondence from r Pyrotech: 1. Hydrants: As agreed to during our meeting on October 10th and a subsequent site visit by North Andover Fire Department staff, we will be adding three (3) additional hydrants as shown in Design Modification No. 17 (attached). 2. Firewalls - Chemical Storage Areas: We agree with the comment and have revised the E firewall and fire suppression system requirements in Design Modification No. 3 (attached) to the agreed-upon criteria. E3.A. Automatic Sprinkler System: We agree with the comment and have revised the fire suppression system in Design Modification No. 3 (attached) to provide the necessary coverage. 3.B. Process Fire Protection: NEFCO does not plan to install additional manual sprays to the dryer. The closed loop dryer design limits oxygen availability, and the dryers are (� equipped with both automatic and pushbutton sprays. r1 99 Main Street • Topsham, Maine USA 04086 • (207) 725-8721 • Fax (207) 729-8414 • wp@wright-pierce.com I Offices in New Hampshire,Massachusetts and Connecticut www.wright-pierce.com C Mr. Robert Nicetta December 7, 2001 a Page 2 4. Explosion vents: Ci • Silos: The attached detail shows the pressure relief deck detail for the silos, which are being supplied by Columbia TecTank. Please let us know if additional information is desired. • Separators: The separator relief vent uses a rated relief latch. The design calculations and details are attached. u • Recycle Bins: The recycle bin relief vent is rupture disc type by Fenwal. The design calculations and details are attached. The recycle bin has been designed with a bottom cone consisting of 4-sided inverted g g pyramid at a 60° angle from the horizontal. The cone section will be 8.25-feet high and holds 9.5 cu.yd., which exceeds the peak storage requirement by 1.5 times. A square section of bin will be mounted on top of the inverted pyramid that is 9-feet by 9-feet square. The rupture disc will be mounted on the vertical wall immediately aabove the inverted pyramid section. Above the explosion vent section, the only additional height will be for the structural members supporting the cover of the bin. CThe required size of the rupture disc has been calculated by Fenwal following the procedure outlined in NFPA 68. The required vent area is 7.76 sq.ft. (0.72 m2) assuming a rupture pressure, Pstat, of 1.5 psig (0.1 bar). The vent size calculations Cassume a Kst value of 98 bar-m/s and Pmax of 9 bar. Test values for the pellet product of 94 bar-m/s for Kst and 6.5 bar for Pmax were determined by the Hazardous Research Corp. in 1992 for the MWRA biosolids dried to 4% moisture. Thus, the design criteria appear to be conservative. The vented deflagration pressure, Pred, is 7.4 psig (0.5 bar). The value of Pred used to calculate the vent size is reduced to 0.136 bar (2.03 psi) to account for pressure loss in the vent duct. The calculated relief vent area also accounts for the vessel volume of 21 cu.yd. (16 m3) and the length to equivalent diameter ratio, L/D. Based on the Pred value of 7.4 psig, the n recycle bin is being designed with a yield strength of 11 psi to prevent deformation in the case of a deflagration. A relief vent that is 25-inches high by 47-inches wide was selected. This provides an area of 8.16 sq.ft., which a greater area than the minimum Carea of 7.76 sq.ft. 5. Lightning protection: The grounding and lightning protection systems, detailed on C drawings E-12 and E-13, have been designed in accordance with NFPA 780. We will review the shop drawing submittal for lightning protection for compliance with NFPA criteria. The lightning system professionals will also review the completed installation C and issue an acceptance. We will forward the lightning protection shop drawings once they are approved. C U Mr. Robert Nicetta December 7, 2001 Page 3 6. Automatic gas shutoff: We have revised the fire protection narrative (attached) to note 0 the shutdown of the natural gas and digester gas lines during a fire alarm. 7. Electrical classification per NFPA 820: We have carefully reviewed NFPA 820 concerning conditions where classification within 10 feet of valves, meters, etc is necessary. We believe that with the design of the ventilation to provide 6 air changes per nhour, there are no areas where classification is necessary. We have revised the Hazard U Assessment attached associated with the Fire Protection Narrative attached to reflect this. The duct and piping will be electrically bonded per NFPA 77. We do not expect a "shop drawing submittal" on the duct and piping bonding as this is primarily an installation issue. We do plan to inspect all ductwork and piping prior to start-up to ensure that it has been adequately bonded. We will review the bonding with the Fire Department staff that are involved with the start-up of the fire protection system. C8. Combustible gas detection: We have agreed to provide an alarm at 10% of the LEL and an automatic shutdown at 25% of the LEL. This change is one of several instrumentation C related changes addressed in Design Modification No. 22 (attached). As discussed at the meeting, there is a concern about nuisance alarms and shutdowns and we have agreed that this issue could be revisited in the future if there is a problem with the sensors. Additional Issues: a1. Smoke Detector for Inlet to Admin Building: We have agreed to provide the smoke detector on the inlet to the Admin Building. We expect that installation of the smoke detector will be contracted without the need to issue design drawings or specifications. a 2. Maintenance Testing Criteria: We have added the maintenance testing criteria to the attached Fire Protection Narrative. As noted under Comment #3 below, we will prepare the Fire Systems and Performance Testing Plan prior to start-up. n 3. Fire Defense Plan: We will prepare the Fire Defense Plan as proposed prior to start-up. This will include the Fire Emergency Action Plan, the Fire and Chemical Hazard Control Plan, and the Fire Systems Performance and Testing Plan. If the above responses adequately address the fire protection review comments, then the remaining issues to address are as follows: • Provide shop drawing submittals concerning the lightning protection system. Mr. Robert Nicetta December 7, 2001 Q Page 4 ISI n • Provide Fire Protection Plan including Fire Emergency Action Plan, Fire and Chemical uHazard Control Plan, and Fire Systems and Performance Testing Plan. We will also provide classroom and site training to support the Fire Defense Plan. We are not aware of any outstanding issues with regard to the fire protection review other than those addressed herein or of any other identified issues with the regard to the building permit. [1 Please do not hesitate to call if you have any questions or comments or if any issue or concern �j arises as the construction of the facility progresses. Very truly yours, WRIGHT-PIERCE c Jeffrey R. Pinnette, P.E. Project Manager C JRP/ljc Attachments: DM-3: Firewall and Fire Suppression System Modifications DM-17: Additional Hydrants DM-22: Instrumentation Revisions n Deflagration Vent Info: ± Columbia TecTank Detail for Silos Baker-Rullman Relief Latch Design and Details for Cyclone Separator TPI/Fenwal Rupture Disc Design and Details for the Recycle Bins Fire Protection Narrative Hazard Assessment Ccc: Anthony Caputo, Pyrotech Lt. Andrew Melnikas, N. Andover Fire Department Richard Hogan, GLSD CRichard Weare, GLSD Armand Asselin, NEFCO lJ C C W--T-05-01 1'RI 10,32 AM PYROIECH CONSULTANTS INC FAX; 1 508 833 0206 FAH 1 PYROTECH Li Consultants Inc. LJ October 5, 2001 Li n Lt. Andrew Melnikas u Fire Prevention Officer North Andover Fire Department 124 Main Street North Andover, MA 01845 RE: Report of the Fire Protection Narrative and Plan Review for the Greater L Lawrence Sanitary District Biosolids Drying Facility. n L Dear Lt. Melnikas: r} The following document my review of the fire protection elements of the above Li captioned facilities design. The design as currently presented provides for a good overall level of fire protection and conformance with both state and NFPA codes. r I have commented on the specific responses to my preliminary review of 6/8/00 and our meeting of 5/24/01 in Section A of this report. Section 8 of this r' report comments on a small number of issues left open or not previously addressed. L Many of the issues in this report have been discussed and reviewed with Mr. FJeffrey R. Pinnette, P.E., Project Manager for Wright-Pierce. Accordingly, I. am. submitting a copy of this report to Mr. Pinnette for his review in preparation for our r 10/9/01 meeting. Should you have any additional comments or questions, please call at your earliest convenience. r, Sincerely, LJ A. P. CAPUTO, P.E. Sr. Fire Protection Engineer r APC/znmc Li P.O.Sox 1532.31114v tgeiar Sand*k±L MA02563 5084888.5808 011 M1 10:32 AM FYROTECH CONSULTANTS INC YAX: I M 833 UM rAUI+; 3 A) Review of 6/8/00 and 6/15/01 (serial letter of 01-6) Response 1) Hydrant availability and spacing appear to be inadequate along the southeast access road. No information is provided on drawings C-2, C- 3, C-4, C-5 and C-6 regarding hydrant spacing to the north and west of the Administration and Biosolids Drying Buildings. As identified in the n preliminary review recommendations, hydrant spacing should not exceed L 250-ft. spacing around the plant complex. Location of hydrants must be reviewed with the North Andover Fire Department for use and accessability. Li 2) The combined storage of sodium hypochlorite and sodium hydroxide is [n 1000 gallons or less. Each chemical will be provided with secondary V containment and will also be located in a sprinklered area. Accordingly per 527 CMR, this storage type or quantity-is exempt from the high hazard classification and associated fire wall cutoffs. Accordingly, adequate protection is provided. L, The sulfuric acid tank will be located exterior to the building and the wall in the immediate area between the tank and process building will have a 3-hr. fire rating. Similarly the dust suppression oil tank will also be Lj located outside of the Drying Building and provided with a 2-hr, rated on the wall immediately between the tank and building. Sprinklers will be provided over the tanks (see Item 3). Accordingly, adequate protection V will be provided. 3) The proposed sprinkler protection described in Items 3A and 38 is L' acceptable with the following clarifications. It is assumed that all fire r suppression systems will meet seismic brace criteria. L a) The dry type sprinkler systems for the exterior sulfuric acid tank and dust suppression oil storage area should be correctly described as Extra Hazard Group I providing minimum .3 gpm/sq.ft. density over the entire area (less than 400 sq.ft. per tank) with a simultaneous exterior hose stream flow of 500 gpm: Specifying in this manner will insure that sprinkler head spacing over the tanks will not exceed 100 sq.ft./head whereas ordinary hazard can allow up to 130 sq.ft./head with standard heads and up to 400 sq.ft./head with extended coverage heads. It is r, assumed that working drawings and hydraulic calculations in accordance with NFPA 13 will be provided, Lj r' b) Given the nitrogen blanket system, an open head automatic deluge system will not be necessary for the silos. Although a water spray system is provided in the dryer inlet the possibility V E OCT=05-01 FRI 10:32 AM PYROTECH CONSULTANTS INC FAX: 1 508 833 0206 PAGE 4 exists for an unchecked fire in the dryer/separator duct. Given the limited access to extinguishing a fire in the ducts, consideration should be given to providing a manually activated open head spray system for the ducting. 4) The explosion venting and nitrogen inerting system concept appears to be adequate. Detailed deflagration venting calculations in accordance Li; with NFPA 68 criteria should be provided with the shop drawings. 11 5) The grounding and lightning plan is assumed to be In accordance with NFPA Standard 780. Details of lightning rods, locations and protection boundaries (cones) should be provided in the shop drawings. 6) The concept provided for the automatic shutoff of both the natural gas and digester gases on an alarm of fire appears to be adequate.. It is n assumed that automatic gas shutoff was inadvertently left out of Section L' 2 a) "Fire Alarm System Sequence of Operation" (Section 1 Page of 8 n of the Narrative). The sequence of operation should be revised to include automatic gas shutoff and the fire alarm shop drawings should provide the appropriate wiring details. 7) The planned classification for electrical equipment appears to be adequate and in accordance with NFPA 497 and 820 criteria. Care r should be taken that any electrical equipment within 10-ft. of dint t--s ope_ni_n�s or area of normal combustible dusts and/or flammable vapors is appropriately classified.—Itis- ali6assumed that the duct and piping systems are electrically bonded per NFPA Std. 77. Shop drawings L' should show details. 8) The concept of alarming when gas levels exceed 10% of the LEL is acceptable. Operator option of initiating an immediate shutdown or r� automatic shutdown is certainly appropriate at.this LEL level. Given that most combustible gas detection control panels allow for multiple alarm level functions automatic shutdown at or slightly above the 25°x6 LEL level is easily accomplished and recommended. System shutdown procedures and methods of providing additional ventilation to reduce gas concentrations should be provided in an operator training program (see V Item B 3 of this report). 9) The Fire Protection Narrative provided is an excellent document. The technical information and discussion provided allowed for both a good design basis and review of the same. This document with any F necessary revisions for as-built conditions and fire systems maintenance 1� testing will provide the basis for the Facility Fire Protection Program Wright-Pierce is commended for a job well done. C UU.1-0511 1'Hl 1U:33 AM HHUIECH CONSULTANTS INC FAX: 1 508 833 0206 PAGE 5 0 B) Additional Issues 1) Consideration should be given to providing smoke detection for the air Fl inlet for the ventilation system for the Administration Building. Although ! the Drying Building is over 100-ft from the air inlets, information on L' prevailing winds has not been provided to show the likelihood that the n vent inlets will not be in a smoke plume. Additionally, it is expected that the Administration Building may be utilized as a Fire Command Center L; requiring access by both fire department and plant personnel to access F reference materials to support fire ground operations. 2) Provide fire suppression and detection system maintenance testing r! criteria to incorporate into the Fire Protection Narrative. This should include a listing or the required operational tests and/or inspections for each type of system and the required testing frequency. NFPA r Standards 25 and 72 should be referenced as a minimum. A booklet of L system surveillance testing procedures must be developed to support the r.1 testing program and provide a basis for operator training. Lj 3) Develop a Fire Defense Plan for the facility. This plan must include a r Fire Emergency Action Plan, Component and Control Component and v Fire System Performance and Testing Component. a) The Fire Emergency Action Plan Component should include the reporting of fires, evacuation signals, communications, evacuation plans and routes, plant shutdown procedures, fire defense activities, first aid and rescue, and incident management. b) The Control Component should address the plant fire and Pchemical hazards and associated protective systems in each area. c) The Fire Systems Performance and Testing Component should i address the design basis (goal) of each system, how it operates, automatic and manual activation, and inspection and testing F' criteria. Lj Plant operators and fire department personnel should be provided both r classroom and site training to support the Fire Defense Plan. r U E P Li r i j r f r i ' Design Modification n Ills!'dght-Pierce N O. 3 n Project Name: GLSD Biosolids Drying Facility State Grant No. WPC-MR-S142 L� Project Owner: Greater Lawrence Sanitary District W-P Project No: 6960E Initiated by: X W-P _HES _NEFCO _GLSD GLSD Contract No. 2 DM Written by: JRP DM QC'd. by: MAH Date: 26 October 2001 Attention: L' This Document is to notify the Project Delivery Team and GLSD of modifications to Wright-Pierce's "Issued for Construction" plans and/or specifications. If it subsequently determined that this modification will not result in a change to the Contract Sum with GLSD this Document will serve as a Field Order. If it is subsequently determined that this modification will result in a change to the Contract Sum, a Change Proposal Request and/or Change Order will be submitted to GLSD. n U Description: 1. On Drawing A-2, change 1-hour fire wall at Acid Storage Tank to 3-hour fire wall and provide 2- hour fire wall from edge of Acid Storage Tank 3-hour fire wall to other side of silo area at doors Li 1-2. 2. Delete detail for fire walls shown on Drawing A-13 and substitute the attached detail from Stresscon. The Tremco Dymeric 511 sealant or equal shall be used on the exterior wall. The interior walls shall have the originally specified fire rated sealant(S-7 in Section 07900). 3. Revise Specification Section 15500 for sprinkler system to add the dust suppression chemical area as part of the dry sprinkler system; change portions of the system to Extra Hazard rating; delete pre-action reference in dry system; change alarm valve to wet type; and other minor changes. u n v � r Modified Drawing(s): A-2 Revision 2 L` Modified Specification: Section 15500 U Attachments: Detail for Fire Walls, Section 15500 POTENTIAL CHANGE ORDER: NO Distribution: Richard Weare, GLSD D. Robert Nicetta, Town of N. Andover David Jacques, HES Donald St. Marie, MA DEP-Boston DM Authorized By: Wright Pierce EArmand Asselin, NEFCO Lisa Dallaire, MA DEP - NERO Michael Garcia, CDM Jeffrey Pinnette, W-P ZG Oc7 2edi W-P File, 6960-3.4 Date Verification of receipt and acceptance requested. c ��ww3\voL4\FNc\6950-99\69WE\Desip Moffnatlm\DMM.&M DM03 Page 1 15500-1 (REV 1) SECTION 15500 n FIRE PROTECTION {u PART 1 - GENERAL 1.1 GENERAL PROVISIONS V A. PART A and DIVISION 1 of PART B are hereby made a part of this SECTION. 1.2 WORK TO BE PERFORMED A. Work included: 1. Design, fabricate and install a complete fire protection automatic wet pipe �t sprinkler system for the Biosolids Drying Facility Building and a dry pipe system L for the Acid Storage Area, Silo Rooms 1 and 2, Dust Suppression Chemical Storage Area and a single sprinkler head outside at the dewatered biosolids cake conveyor entrance into the biosolids drying facility as shown on the DRAWINGS `J and in accordance with the standards set forth in this SECTION of these specifications. System to be designed for "Ordinary Hazard, Group 2" coverage r except for the Acid Storage Area and the Dust Suppression Oil Storage Area which will be designed for "Extra Hazard" coverage. DRAWINGS of system shall be reviewed by and acceptable to Fire Rating Bureau having jurisdiction. �? 2. Work begins at flanged outlet left by others in a plumb and level position above the floor of the building where shown on DRAWINGS. n 1.3 RELATED WORK U A. Hand portable fire extinguishers: SECTION 15540, PORTABLE FIRE EXTINGUISHERS. r B. Sprinkler supply entrance into building: SECTION 02550, SITE UTILITIES. LJ C. Electric alarm wiring and electric alarm bell: DIVISION 16, ELECTRICAL. n 1.4 QUALITY ASSURANCE A. Qualifications of installers: n 1. The entire fire protection automatic sprinkler system shall be fabricated, installed and tested by a Contractor well qualified to install sprinkler systems. He shall `J submit evidence of his qualifications to Engineer upon request. B. Codes and Standards: 1. In addition to complying with all pertinent codes and regulations, comply with: a. All pertinent requirements of National Board of Fire Underwriters. r b. All pertinent requirements of the Fire Rating Bureau and Fire Marshal I having jurisdiction. r 1.5 SHOP DRAWINGS V A. Shop drawings: 1. Before any fire sprinkler system materials are delivered to the job site, submit �—+ complete shop drawings to and obtain approval from the Engineer in accordance U �-� 6960C u 15500-2 L' FIRE PROTECTION (REV-1) with the requirements of the GENERAL CONDITIONS AND SUPPLEMENTARY CONDITIONS of these specifications. 2. Prior to submittal for Engineer's review, secure the approval and stamp of review r of the Fire Rating Bureau and local authority having jurisdiction. L 3. Upon request, the Engineer will furnish without charge to the Contractor one set of reproducible transparencies of those DRAWINGS included in the Contract Documents which may be suitable for use in preparation of Shop Drawings. 4. Shop Drawings shall include: a. Layout drawing of the complete overhead sprinkler system indicating relationship of all other overhead items including ducts, ceiling air diffusers, lighting fixtures,beams, piping and all other items. b. All items and data required to be shown by the Fire Rating Bureau having i jurisdiction. LJ c. Complete details and sections as required to clearly define and clarify the design, including a materials list with catalog cuts describing all proposed materials by manufacturer's name and catalog number. V B. As-built Drawings: 1. During progress of the Work, maintain an accurate record of all changes made in the fire sprinkler system installation from the layout and materials shown on the approved Shop Drawings. C. Manual: 1. Upon completion of this portion of the Work, and as a condition of its acceptance, LA deliver to the Engineer for the Owner two copies of a Manual describing the system. Prepare manuals in durable plastic binders approximately 8-1/2 by 11 L, inches in size with at least the following: a. Identification on, or readable through, the front cover stating general nature (� of the manual. b. Neatly typewritten index near the front of the manual, furnishing immediate information as to location in the manual of all emergency data regarding the installation. c. Complete instructions regarding operation and maintenance of all equipment involved. n. d. Complete nomenclature of all replaceable parts, their part numbers, current L cost, and name and address of nearest vendor of parts. e. Copy of all guarantees and warrantees issued. r f. Copy of the As-built Drawings. g. Where contents of manuals include manufacturers' catalog pages, clearly indicate the precise items included in this installation and delete, or otherwise clearly indicate, all manufacturers' data with which this installation is not concerned. r� 1.6 PRODUCT HA'.NDLLTG LJ A. Protection: 1. Use all means necessary to protect fire sprinkler system materials before, during Eand after installation and to protect the installed work of all other trades. n 6960C u 15500-3 FIRE PROTECTION B. Replacements: (REV-1) 1. In the event of damage, immediately make all repairs and replacements necessary to the approval of the Architect/Engineer and at no additional cost to the Owner. 1.7 GUARANTEE A. This Contractor shall guarantee all materials and workmanship furnished by him or his subcontractors to be free from all defects for a period of one (1) year from date of final acceptance of completed system and shall make good, repair or replace any defective work which may develop within that time at his own expense and without expense to nthe Owner. V PART 2 -PRODUCTS '—' 2.1 DESIGN A. General: 1. The design shall be complete in all regards and shall include, but not necessarily L' be limited to: a. Connection to main water service entrance, including all required valves, fittings, and other items. LJ b. Overhead sprinkler system for those areas where indicated on the DRAWNGS. 2. All piping in areas having ceilings shall be concealed. 3. Sprinkler work shall be laid out to adequately cover the areas of the building in accordance with the requirements of all authorities having jurisdiction over its installation and to afford adequate clearance with the work of the other Contractors. Piping shall generally be run parallel to walls and girders. Before installing any piping, Sprinkler Contractor shall consult with the Contractors for Li the other trades to avoid interfering with their work and he shall be responsible for any expense involved due to negligence in not so doing. 2.2 MATERIALS A. The quality of materials required for this installation shall be that required by the agencies having jurisdiction. 1. Sprinkler heads: a. All sprinkler heads in areas with finished ceilings shall be chrome plated r? pendant spray type with chrome plated escutcheons; heads in areas of exposed piping may be bronze pendant or upright. Temperature ratings of the heads installed shall be proper for the particular area involved. r� b. In addition to the heads actually required, Contractor shall furnish extra sprinkler heads of each finish, including six heads of each type and temperature rating used and two suitable wrenches contained in a metal C cabinet. The cabinet shall be installed in sprinkler service room. 2. Alarm valve: a. Approved wet pipe valve complete with all trim and shall be installed where indicated on the drawing. �-' b. Approved O. S. & Y gate valve shall be installed on street side of the alarm valve. F4 E 6960C C15500-4 FIRE PROTECTION �-y I c. Water motor gong shall be installed in location approved by Engineer.(REV-1) L' 3. Water flow alarm devices: a. All conduit, wiring and connections for the alarm systems including providing and installing the electric alarm bell will be by Electrical Contractor, but the Fire Protection Subbidders shall provide and install gate n valve, flow switches and alarm valve complete with trim to receive A.D.T. 4 or similar type system. b. Alarm equipment shall be of the same manufacturer as the building alarm system. C4. Fire department connection: a. Siamese fire department connection shall be provided and installed with the n required check valve and automatic drip. I 5. Pipe: L' a. All pipe inside the buildingshall be black steel pipe. Steel pipe shall conform to the latest Standard Specification for Welded Seamless Steel Pipe of the ASTM A-120. 6. Valves: F7 a. All valves shall be the product of an approved manufacturer and shall be 1 U designed for pressures suitable for the duties to be imposed upon them in the system. They must be in accordance with the requirements of authorities Chaving jurisdiction over the work. 7. Fittings: a. All fittings shall be the products of an approved manufacturer standard n weight ASA B-16.4 and shall be designed for pressure suitable for the duties to be imposed upon them in the system. They shall be sprinkler pattern of gray cast iron. b. Screwed fittings shall have clean cut tapered threads. Ll c. All fittings on mains and risers shall be flanged, long turn pattern. 8. Pipe hangers: a. All horizontal piping shall be supported at intervals of not more than 10 feet, 0 inches by adjustable clevis type hangers. Where pipe sizes require, spacing shall be such as to prevent sag in the lines. b. All verticalpiping shall be securely anchored and provided with alignment ►� guides where necessary. c. Pipe hangers shall be of the type approved and listed in NFPA Pamphlet NO. 13. d. Pipe shall not be supported from piping of other trades. e. Provide any required seismic bracing in accordance with NFPA-13. 9. Sleeves and escutcheons: a. Contractor shall set sleeves for all piping penetrating walls and floors. Sleeves through masonry shall be steel pipe sleeves two sizes larger than the pipe. Piping passing through walls other than masonry shall be provided with#24 gauge galvanized steel tubes with wired or hemmed edges. b. Sleeves set in concrete floors shall finish flush with the underside but extend a minimum of 1 inch above the finish floor. Weld clips to sleeves for support in concrete precast planks of a size which will be covered by concrete topping. Sleeves set in partitions shall finish flush with each side. f 6960C n E 15500-5 FIRE PROTECTION (REV-1) c. Where piping passes through finish walls, floors, ceilings and partitions, provide and set two piece nickel plated steel floor and ceiling plates. d. Space between sleeves and pipes shall be caulked with asbestos rope to make smoke and water tight. 2.3 EXPANSION AND CONTRACTION A. Long runs of pipe shall be provided with suitable means to permit free movement LJ resulting from expansion and contraction of the pipe. 2.4 INSPECTORS TEST AND DRAIN A. Provide and install an Inspectors Test connection as required by NFPA Pamphlet No. 13. Also provide the necessary main drains and auxiliary drains at all low points in the system. PART 3 - EXECUTION U 3.1 SURFACE CONDITIONS A. Inspection: Li 1. Prior to commencement of each stage of the fire sprinkler system installation, carefully inspect the installed work of all other trades and verify that all such work is complete to the point where this installation may properly commence. 2. Verify that fire sprinkler system may be installed in complete accordance with all j-t pertinent codes and regulations and the approved Shop Drawings. LA B. Discrepancies: 1. In the event of discrepancy, immediately notify the Engineer. n 2. Do not proceed with installation in areas of discrepancy until all such discrepancies have been completely resolved. 3.2 CUTTING AND PATCHING A. All cutting and patching incidental to the installation of the apparatus and the work shall be executed by the General Contractor under the direction of this Contractor, who f shall furnish the General Contractor with all locations and details as required. Failure ►_, on his part to furnish the proper locations or details shall make this Contractor responsible for this work. n EL 3.3 INSTALLATION A. Install the complete fire sprinkler system in strict accordance with all pertinent codes rand regulations and the requirements of the Fire Rating Bureau having jurisdiction. 3.4 TESTING C' A. Upon completion of the fire sprinkler system installation, furnish all personnel and equipment required and test and retest the complete system, making all adjustments necessary to secure the approval of the Fire Rating Bureau and Fire Marshal having jurisdiction. L F 6960C u n 15500-6 FIRE PROTECTION �-, 3.5 ACCEPTANCE (REV-1> �► A. After the fire sprinkler system has been completely approved, secure a letter of final acceptance from the Fire Rating Bureau having jurisdiction and deliver three copies of j the letter to the Architect/Engineer. ! n END OF SECTION r U Li r �-y I 1 L r U U r 1 ' u U n n 6960C IF Kati 25 01 02: 54p 6eorgeS Parker 207-563-7029 p. 3 u C`1 istreswall PRESTRESSED INSULATED CONCRETE PANELS FIRE RATED PANELS AND JOINTS n I `J Fire Endurance of StresWall Panels The standard 8" (200mm)thick StresWall insulated panel has 1 or 2 hour fire resistance provided that both the interior and the exterior joints between the panels will be sealed with Tremco two part sealant. L, Full scale tests were conducted according to ASTM E119 Specifications.Wall assemblies tested were 8"thick with 2" Polystyrene insulation and the*standard* rib pattern.Other rib patterns qualify for these fire ratings. For more information on fire ratings of insulated sandwich wall panel assemblies, ask your precast concrete manufacturer or see the U.L.Fire Resistance Directory. n LJ E 8" 3" 2" 3" Rib pattern . ' a varies Tremco cerablanket G.E.Silpruf sealant for 1 t/2" minimum depth 4 hour rating or Tremco � ' Dymeric sealant for (See Tremco data L` sheets) 3 hour rating or higher Tremco Backer rod monolithic " sealant n INTERIOR EXTERIOR _Wall and Joint Assembly LSI for 3 or 4 Hour U. L. Fire Rating n u o r TECHNOTES TN102 n Design Modification Wnwht-Pierce No. 17 n Project Name: GLSD Biosolids Drying Facility State Grant No. WPC-MR-S142 u Project Owner: Greater Lawrence Sanitary District W-P Project No: 6960E Initiated by: X W-P_HES _NEFCO _GLSD GLSD Contract No. 2 DM Written by: MAH DM QC'd. by: -ay Date: 2 S o oaC� 2�a� n Attention: This Document is to notify the Project Delivery Team and GLSD of modifications to Wright-Pierce's "Issued for Construction" plans and/or specifications. If it subsequently determined that this modification will not r? result in a change to the Contract Sum with GLSD this Document will serve as a Field Order. if it is subsequently determined that this modification will result in a change to the Contract Sum, a Change Proposal Request and/or Change Order will be submitted to GLSD. Description: u 1. In response to the Fire Department review, install 3 new fire hydrants including 6"tapping sleeve & valve and hydrant assembly at the location indicated on Figure 1. n Li 17 L n , n L, 1 Modified Drawing(s): C-2 Modified Specification: None r� r -� Attachments: Figure 1 n II POTENTIAL CHANGE ORDER: YES _ Distribution: r � Richard Weare, GLSD D. Robert Nicetta, Town of N. Andover David Jacques, HES Donald St. Marie, MA DEP- Boston DM Authorized y: Wright Pierce n Armand Asselin, NEFCO Lisa Dallaire, MA DEP -NERO Michael Garcia, CDM Jeffrey Pinnette, W-P ZS dG7df�rX ou, W-P File, 6960-3.4 Date n L, Verification of receipt and acceptance requested. MP3lv0l4\ENGNM0-9%6960 A10aA=dW\DM-17.aoo DM-17 Page 1 I btiH2 42 ._._.._._.. ..._ I .b aw ♦o, ZOE L ba s n Z O GREATER LAWRENCE SANITARY DISTRICT . D1 AWN II'f klW.. -__-_ NI---____—._.______NI4ISNINS _-- N'I'U n"II pSU10 IURRINI WRINIS2/'/� 0 NORTH ANDOVER, MASSACHUSETTS C!ICKIo Nrp� _ -- -- ----._..__..-__.-. -. MEW MLAND _ BIOSOLIDS DRYING FACILITY N'PRO JOE! �— ISSMD IOR HQUINC: 4/23/00 ---------------------------------------- -- FERTILIZER CO. UAIL�Yl/00 - ' AM 97 EAST HOWARD SRTEET ' �' CO UlA)K N0._ _ --------------------._-'------IQUINCY. MASSACHUSETTS 02189 MtibthNt TiMl�Wyt6iul�AMON PRWICI N0. 6960AIASI9owuoow. REVISED HYDRANT PLAN 6 7/176-2110 SlAIk NONE _ _ FAX E17/9B4-OY53 i@(7i/>7IM4 t1 !Ai(t17JTt1-MIS --._-.__--.—`----'-----__----_ —" ntwa: n Design Modification Wright-Pierce No. 22 n Project Name: GLSD Biosolids Drying Facility State Grant No. WPC-MR-S142 LJ Project Owner: Greater Lawrence Sanitary District W-P Project No: 6960E Initiated by: X W-P_HES _NEFCO _GLSD F1 GLSD Contract No. 2 DM Written by: MAH/SLH DM QC'd. by: JRP L—' Date: 7 December 2001 Attention: This Document is to notify the Project Delivery Team and GLSD of modifications to Wright-Pierce's "Issued for Construction" plans and/or specifications. If it subsequently determined that this modification will not result in a change to the Contract Sum with GLSD this Document will serve as a Field Order. If it is subsequently determined that this modification will result in a change to the Contract Sum, a Change Proposal Request and/or Change Order will be submitted to GLSD_. Description: 1. Modify the Instrumentation Schedule so that instruments TE-310 C, D, E, Fare relabled as TI-310 C, D, E, and F and so that they refer to the specification section 13440 2.1 B.36. Add the following `J paragraph to 13440 paragraph 2.1 B. n "36. Temperature Indicator: a. Provide a remote reading surface mounted thermometer with a 4 1/2" dial in a stainless r_1 steel case. Temperature range shall be as indicated in the instrumentation schedule in degrees F. Sensors to have 12" bendable extension with union connection with 20+ feet of line and shall be mounted as shown on the process and instrumentation Drawings using E a stainless steel thermowell. Equivalent to Ashcroft Model Duratemp 600A-01." i 2. On Dwg PR-5 change FE-511A to FI-511A (rotometer for the plant water to the VenturiVSC-lA). 3. On Dwg PR-7 change FE-511B to FI-511B (rotometer for the plant water to Venturi VSC-1B) r-1 4. The combustible gas detectors shall be set to give a local and SCADA warning alarm at 10% of the i� LEL. Add the following to Section 13441 paragraph 3.9 C. 4.: "d. Dryer Fuel Train Combustible Gas Warning e. RTO Fuel Train Combustible Gas Warning f. Digester Gas Vault Combustible Gas Warning" 5. The combustible gas detectors shall be set to alarm and shutdown at 25% of the LEL. Add the mfollowing to Section 13441 paragraph 3.9 C: "5. PLC Control: a. System shuts down orderly at the dryer fuel train combustible gas alarm. Cb. System shuts down orderly at the RTO combustible gas alarm. c. System shuts down orderly at Digester gas vault combustible gas alarm." mJ:1ENG\6950-9916960E\Desi9n ModificadoMDM-22.doc DM-22 Page 1 n Modified Drawing(s): PR-5, PR-7 Modified Specification: 13441, 13440 C Attachments: None CPOTENTIAL CHANGE ORDER: NO Distribution: Richard Weare, GLSD D. Robert Nicetta, Town of N. Andover David Jacques, HES Donald St. Marie, MA DEP-Boston DM Authorized By: Wright Pierce Armand Asselin, NEFCO Lisa Dallaire, MA DEP - NERO Michael Garcia, CDM Jeffrey Pinnette, W-P �L DL%Z Qtn JJC'Y Zu�� n W-P File, 6960-3.4 Dan Brassard, HES (fax) Date I L' Verification of receipt and acceptance requested. C C U U C l__i n L-j u - r u C C JAENQ6950-9916960E10esign ModificationOM-22.doc DM-22 Page 2 F1 „ IrAK llj% taj AMU UtLK aLtarthla MAY Ut UNILKILU IU W1I UNLLSS_ !Lit—u _ NIA uw s NU: tll [2 [��6) G�AXIC� PLAN COI�r�ANO _'E T11L SME I[ _ Oi _ TIO �_.J1NG.�,..,T'f 14[x„ A H4u., sTRENt �n �r1N-SNrtiiw 0”, LIN MINIMUM COMPRESSION STRENGTH OF TOM P.S.I. AT 28 DAYS. AND IS TO BE APPLIED 1N ACCORDANCE WITH MANUFACTURER'S SPECIFICATIONS. 6) WHEN ENCAPSULATED BOLTS ARE REQ'D. THEY ARE TO BE USED DNLY 1N THE COMPRESSION BAR. VERTICAL SEAMS ABOVE HOPPER, HOPPER RADIAL SEARS. AND OUTLET COME. ENCAPSULATED BOLTS ARE NOT SUPPLIED FOR THE DECK SEAMS UNLESS NOTED OTHERWISE. 7) LEVELING BOLTS ARE PLACED 1 AT 6 SPACES. BY ADJUSTING THE LEVEL NUTS MAKE BOTTOM CHIME FLANGE LEVEL - 1/8". DO NOT USE LEVELING BOLT AT CHIME LAP. 8) ERECTION CONTRACTOR TO COORDINATE THE TOUCH-UP PAINTING TO ASSURE THE PROPER PAINT IS APPLIED TO INTERIOR AND EXTERIOR SURFACES. CONTRACTOR TO FOLLOW MANUFACTURER'S LABEL INSTRUCTIONS. 9) RADII FILLET GASKET IS SENT IN 6' OR 12' LENGTHS. AND IS TO BE FIELD CUT 10 2" I.G. FOR IRV. 4** I.G. FOR 2RV AND 6" I.G. FOR 3RV STAVES. 10) ADEQUATE BLOCKING SHOULD BE USED TO PROTECT STAVES WHEN STACKED FOR ERECTION II') FOR COMPLETE ERECTION DETAILS. SEE*COLUMMBIAN TECTANK'S STANDARD BAY TANK ERECTION MANUAL. DESIGN DATAi 1) CENTER FILL. CENTER DISCHARGE. 2) FLOW PATTERN FU111EL 3) PRODUCT SLUDGE PELLETS 4) PRODUCT COMPACTED BALK DENSITY 60 PCF G) MIND LOAD PER A9CE 7-96 100 MPH 6) SEISMIC ZONE PER UBC 1997 2A 7) DECD( LIVE LOAD 30 PSF , 8) DESIGN PRESSURE 4.6 OZ. PER SO. IN. POSITIVE 0.6 OZ. PER SO, IN. NEGATIVE TANK DATAs 1) TANK COATING- INTERIOR PRODUCT ZONE AR-LON 6100 INTERIOR SKIRT POLYAMIDE EPDXY PRIMER , EXTERIOR POLYAMIDE EPDXY PRIMER W/(CUST. TO SPECIFY COLOR) ACRYLIC ENMEL 2) HARDWARE& MMEOUINICALLY GALVANIZED BOLTS W/FLAT WASHERS A IDG LEX NUTS. COMBINATION WASHERS FOR HOPPER. DECK. AND TOP CHIME. 3) GASKETIN6e EPO" + 4) ESTIMATED VOLU E& 19700 CU. FT. LEVEL FULL v L.� 6) ESTIMATED WEIGHTS LBS. LEVEL FULL e REFERENCE O WINGS FOR ERECTIONn`R C0NSTRUC 110N AMMD DETAILS FOR INDUSTRIAL TANKS B-60-00-0000-63 0000- SHTS 1A2 � �pPROUE� �V" - DECK STRUCTURAL ASSY. 2-CIOX16.3. B-60-21-0700-07 COLOR CHART PLOT PLAN, SPIRAL A CROSSOVER DETAILS D-88-01-1629-00 STANDARD DETAILS FOR PERIMETER GUARDRAIL C-60-21-0604-00 T -2B PRODUCT STORAGE SILO NGTH) H . E . SARGENT INC . CONFIDENTIAL D fNS !:RECTION DETAILS FOR well It D .9200t 21'-6 1/2" I.D. am mu m m m m lecTar BOLTED STEEL TMMC N W OOPWAflN, A 11530 p 1 50-21-11530-00 i L CDECK RADIAL SE I DETAILOR PARTS AND SEE PERIMETER GUARDRAIL DRAWING. Fl o o . 0 0 0 o f e i ElIME E 3/8' A307ROWARE IN TOP '� �o 0 0 o Iii 0 USE 3/4'•2 1/4'LG. A325 o HARDWARE W/ (2) FLAT `i i WASHERS. (TYP') of La SEC" VERTICAL SEAM ( TYP. CNTR. 6 BO JS/ PRESSURE RELIEF DECK DETAIL HOPPER SEGMENT _8" 150+ DRILLING FLGO SHIM AS REQ'Do L► � I i i 2-HL BOLT • CHANNEL _�« _7 SHIM AS REO'DO _ n C-71 - -J F-73 [---J 1-3 [-: [--J C--Dc-D r-71 c 73 LJ U--:l c73 12 GA. MS. COVER PL (44) 7/16'0 ON L 2 X 1 1/2 X 1/4 TYP. 49 1/2B.C. 1 ( 1 1 1 r 1/4-0 AIRCRAFT CABLE !` DOOR TO OPEN 75' � 1 1 111 1• 1 1 1 I 1 1 1/4' ALUMINUM FERRULE (4) REQ'D. 1/4• QUICK LINK SIEMENS 3SE03 CONNECTOR (4) REQ'D. �� 1 1 / i LIMIT SWITCH 1 I 1 +iii PLAN VIEW 2 1/2- S.S. HINGE BRIXON MODEL 2P SAFETY LATCH (4) REQ'D. C6 X 8.2 CHANNEL FRAME ---- ------ ----------- A 11-20-01WOMY F1RST IM REV DATE DESCFAnM 3'-11 3/16' ID. OF FLANGE DO NGT SCALE DRAWING. REPORT ANY ERRORS. TOLERANCES UNLESS OTHERWISE NOTED: )PIr �� PNEUMATIC CONVEYING SY81I'EII FRACTIONS: DECIMALS: Mo°'54•'ro s.>-T dm 5 1 45-1 USA 47 4'-1 1/2' B.C. UNDER 10'-0' 11/32' 3 PLACES 1.005' �' �1°" SI1-313-31iS•LMlac SII-316-1N7 OVER 10'-0' tt 16' 4 PLACES 1.0005' CUSTOMER: BAKER-RULLMAN MFG. INC. EXISTING ANGLE FRAME m 2001 CLARKE'S SHEET METAL. INC. LOCATION: WATERTOWN. WI ELEVATION CONFIDENTIAL AND PROPRIETARY DWG. TITLE: 47 3/16- LATCH VENT Au RIFowTMs IATION DISCLOSED BY DOCUMENT6 CUSTOMER DRAWING coNFOENrIAL AND PROPRIETARr er g1JtK S SHEET METAL, RIC. DUPLICATION OR PIT SCIIE 12 SCALE: I'- I'-0' ORIC 11D REV TRANSFER OF TM DDclr�OR gLI ION 3720-010 A OF THIS NffORWTMN TO OTIEM Is PRDHIertEo own W.sm ASII No: 0 wffm f INE MON NR l"m cofmc aF aAlncE s 11/28/01 16:49 $541 945 1447 CLARKE'S EUGENE 0002/003 boa'' l3�5'6,o C : ` ; �SivEN� �ZYxat� I�I obi,. Z� s�f�T y �.ATc+� - RE��►sE Fo2cS =�/S# 3-7 9.0--0101 0105 �A'rc N LoGATaotj �8 � I LLL!!! U 1. r Z L�•Ycr+�s sr,��pacr �,�ZLE p,eaat YZ SkEAF&C ARZA L D Lo aa oit tizy L i o is C U 11/28/01 16:44 12541 345 1447 CLARKE'S EUGENE 0003/003 �, �� �Z + • ®R`t , s�� — , !z5 Lrcfl rote cc's (147' o r� (,a x z f yA� .Izs,•C (y.z z sG' l ^ 1 k.1"f 46 1`— • ( J 1' '�' Izs r Li �' `l►7,± m j .,5 t z • r 3•��� ZG.a y .� ��zo i. I FENWAL u Safety Systems u Fax i� To James Prentice From Burke Desautels Date November 29, 2001 i u Fax 207 729 8414 Ref NEFCO Cc Alan Stone Pages 3 Transmission Products 804 233 5723 B.Merdam, FSS Subject Vent Calculations Hi James, n My name is Burke Desautels and I am a colleague of Bill Merriam. He asked me to fax you the U attached copy of the requested vent calculation. Please review the calculation and feel free to contact n me with any questions. U Sincerely, Fenwal ry -[�a , `-' Burke Desautels n Regional Manager Industrial Explosion Protection U n L n E E u C Fenwal Safety Systems IGdde Technologies, Inc. Tel (508)4815800 700 Nickerson Road Fax(508)488 3115 A Kkide Comparry Marlborough,MA 01752 USA www.fenwalsefety.com u T00Z A133Vs 'IVIAN33 STTCSS SOST M OZ:BT' TO/6Z/TT C 7 C- 7 C -71 1-7 F-3 C-3 n C-^7 F-71 F-7 C7:1 C--D F-7 1-71 C Dust Deflagrations N O CD (� Vent Area Calculations in accordance with NEPA 68, 1998 For High Strength Enclosures handling Combustible dusts - for internal use only. 1.This spreadsheet is for vent area calculations in accordance with NFPA 68, 1998 Section 7-2& 54.1.4 2.Calculations are included for the effect of vent ducts 3. Entry errors will change the cell color to: - 4. Enter values in the Metric system 5.Note that NEPA 68, 1998 does not specify a minumum differential between Pstat and Pred. In the 1994 edition Pred had to exceed Pstat by at least 0.05 bar. It is suggested that you use 0.05 bar minimum in the absence of any other guideline. 6. Note -All results are valid for initial pressure conditions< 0.2 bar 7.These vent calculations are based on low mass. low inertia vent panels. See sections 3-6.14.1 and 7-3. JOB REFERENCE INPUTS __-' 'lsls_vetLt=d_uct instailed _Enf<er=Yes orNa: =yes __-1 I(_Y _ enter_ciuct length =:. �1zAf3 )ylaimtim_t3ivfekeis zlrteret 'TF C1 D-4 s v_lntadvtturs _-0_ e T) I ' 1_b _- a e - Rred = 0.455 Between 0'1; - - 3 _Ksf 1l Iue =- -- _ 98_ aximurn 8�_Orba tn/s FCst QO=Ic B or._jPmax 5 T=2=tZ�-1<st_10 tom_ or=P_ma -17 �I: %etq 1!n' D� i2t2�r__=:_.=' __-_ r =r -- - 5 T at._ B Nui3s U-4 aL-aq it 1 bares �e�file e -- s: �e&arQin 90 m_3 �- 7LDLo` 1.16 Enter from Box 1 -must be no greater than 6. Delta A 0 Added to Vent area when 2<=LID<=6vl� _ _ in 7�1.Ciroula'r Crosseett 1=Aces� =-- - - ao — - -- �_ - - — Go Vent Area 0.757922944 Intermediate result L= -_ =- " :r -0= Vent Area(Will be Modified it UD ratio greater than 2 �=Ratio: j-_ _ ' L�1 #DIV--AC-L- and less than 6 for Pred values up to 1.5 bar) ?_ :Recf_angulaK CrosseEfonal ATeSD=:2(ACj" �+ Vent Area ©,' t 17 r, r, ' Area ;o RESULT CID Note-All results are valid for initial pressure Conditions < 0.2 bar Box 1 - UD Calculations o N. M N Page 1 L /� F-711 1 C ___1 C-7 E-71C "7 CT 3 C C 7 CT7 C� 1-3C C�7 �7 C-7 Dust Deflagralions .-, 0 0 Modified Vent Area for Media Type Dust Collectors According to NFPA 68, 1998 section 7-6.2, for media-type dust collectors, deflagration vents should be located on the dirty side of the collector volume.The minimum amount of the total vent area that should be provided on the dirty side is given by equation (25). The corrected vent area for this is given below: - -_ Enle'r-d st rnll�c or- tfty volumes :IN-taOusl�cotlec►�_r fofa�¢)um-e - Corrected minimum dust collector vent area Flame Clouds from Dust Deflagralions According to NFPA 68, 1998 section 7-7.1, the maximum horizontal length and maximum diameter of a fireball exiting from an enclosure can be calculated and is determined bye uation (26). This maximum distance and diameter is given below: olte = _- _ i" —_ __�_m_ &JIS - Maximum distance and diameter of fireball c Equation (22)from NFPA 68, 1998 Section 7-2.2 (Vent area equation-modified due to typing error In NFPA 68. 1998): `" Av = [3.264 X 105 X Pmax x K.1 X Pred-0'569 +0.27(Pstat-0.1) X Pred-0.5) X Vo.753 a e Equation(23) from NFPA 68, 1889 Section 7-2.3 (Additional vent area for UD greater than 2) A A = A„[-4.305 x Log toPmd+ 0.7581 X Loglo LID Equation (17)from NFPA 68, 1998 Section 5-4.1.4 (To modify initial Pred required to accommodate back pressure from vent ducts less than 3 meters long) Fred = 0.394(Pred)1.529 CO C. � Equation(18)from NFPA 68, 1998 Section 5-4.1.4 (To modify initial Pred required to accommodate back pressure from vent ducts 3 to 6 meters long) w. N Fred = 0.001(Pfed)2.094 0 Page 2 SUBMITTAL CERTIFICATION FORM u n PROJECT: Biosolids Drvin, Facilitv MANUFACTURER'S PROD. NO: N/A MANUFACTURER: Femval ENGINEER'S PROJ. NO: 6960E ENGINEER: W'rivht Pierce TRANSMITTAL NU)[BER: 3 SHOP DRAWING NUMBER: n SPECIFICATION SECTION OR DRAWING NO: 14554 4 DESCRIPTION: Deflagration vent on recvcle bins L, n rhe abo%e referenced submittal has been reviewed by the undersigned and I i we certity. to the best of our ability. that the IL material and or equipment meets or exceeds the project specification requirements with: r-t ❑ NO DEVIATIONS or n ® A COMPLETE LIST OF DEVIATIONS AS FOLLOWS a Bv: � n Date: November 14. 2001 \nv deviations not brought to the attention of the Eneincer for review and concurrence shall be the responsibility of the Manufacturer to correct.if so directed. b Required on all submittals Page 1 of 1 C Explosion vents are sized for an activation pressure PSTAT of 0.1 Bar (1.47 PSI) per NFPA 68. rl L-, Vent size is 25" x 47" as sho\\n on recvcle bin dra\vtnUs previously submitted. (Shop Drawing 57). n' U Engineer's Stamp � n l I C r� i ., I I r i u I r1 END OF SECTION u E FENWAL L Safety Systems Fax V To Alan Stone From Burke Desautels Transmission Products Date November 6, 2001 Fax 804 233 0302 Ref NEFCO C Cc Pages 2 Subject Vent Calculation Hi Alan, Attached, please find a copy of the revised Vent Calculation for the NEFCO project. I confirmed the explosibility data from our previous systems at New England Fertilizer. The revised calculation is n different due to the duct and different and L/D ratio, however, they essentially offset each other and the 25" x 47" is adequate. n Thank you for your interest Fenwal Safety Systems and our explosion protection capabilities. I If you have any questions or comments, feel free to contact me. VSincerely, Fenwal Safety Systems r Burke Desautels L Regional Manager Industrial Explosion Protection n u r' L n L r1 Fenwal Safety Systems Kidde Technologies,Inc. Tel (508)481 5800 700 Nickerson Road Fax(508)485 3115 .60 .6 q Kidde Company Marlborough, MA 01752 USA www.fenwalsafety.com T00QI luadvs 'IV.fSal STTCSMOST YVd LY:ZT TO/90/TT n- L Dust Deflagrations n L .Ventaccord w8';::.' 998a. cna6 For High Strength Enclosures handling Combustible dusts-for internal use only. 1. This spreadsheet is for vent area Ixic:.'laaons In accordance with NFPA 68, 1993 Section 7-2 &5-4.1.4 L' 2. Calculations are included for the effect of vent ducts 3. Entry errors will change the cell eeler:o: �I 4, Enter values in the Metric system L 5.Note that NFPA 68, 1998 does not specify a minumum differential between Pstat and Prod. In the 1994 edition Prod had to exceed Pstat by at least 0.05 bar.It is suggested that you use 0.05 bar minimum In the absence of any other guideline. 6. Note-All results are valid for initial pressure conditions <0.2 bar 7.These vent calculations are based on low mass, low inertia vent panels, See sections 3-6.14.1 and 7-3. J08 REFERENCE Transmiss;cr Products'Quote#0.1047Rev..1.calculatlo6, : " INPUTS Ar.,rlti'; k; siv nt.dvcanstalJeif?Entsr,]'e5� r? l;;tj7 I ,c:; t { "lc:at,t,,,,; ,I.r .,,�,;, ,•..n �!,; •,t,� ;,1!,��.., r..'� �l,,t '•6.1„"•e�;r flln '•il'.I�„"'I'6�wsiie•:;3�eY• c>tl�te; �,tri;7:,ti:l,,l,ai.,..,,:+r„i Nta.F '";il•�:,.v!{%•»}y;;;tll:;; rl'.,.1,,111;%fr!'n;`,?i)it.r��"rJf.',C rw,,..�t)gr•. ",,q s,a�j� •;ffl"'i,,,,,l;m'f'S„•,'brrq{ ',c•'aitRlil„ 'llgi7., a-w,' n ;:Y::,'rrll., �i,1;1,,,t ,>�'tr�» "�f, �r:F:i�.”' � ;,; i t G;;:L,j •�.,1;{ IJa Sii11, ;I i '' 1 1 ri ,:,:111%:u _.:i�ri`:::'G' �t! i::i,l,,, .,,I,m,.,:;:;.,1„r ,�,r, 'i'f!IAI,.t..: �;ri:.. ""'^`r'r_ '' .1 .t, ,'I, '1..1,rt t 1.1f'�'t l.,t;,')f1� 4•"iI), 1j. �� �I t�rl'E'5L1 ?,�'., $ 8:.E11::�t,n�1r,., 'l r:;iue ;ern nC(!� �4m t .� ;'!Ab.”t' .._.. ,w- �� .,,,di, +;r�,i,�,fr�,tr, �.., 1,.!!!!It(��•',t Fi:-'`1"(`tl�rt,r•rw"'n„r: � '�n.�” t..,..:� S h•. e;,„JIfi± fele` r� aian !ilodis r � cesc ��?lfe�let , 1 " tact " 'p �laytNy ' � yt..........;,.n °.. 1,• Li '�.'�r�.l�tl,p.:u ''� Q.' Oe�ee ,� �`L�7�Z•t����'��yy�y�'���'}�11'irvrr�f.' ''1�.�'r �i:ir �rlf''N;�w ;Ll�'.i,NOM:�` !"IYJ f111!1;': "t", 7,.... -. f;n•r.r »,,., a tlll L.c:,tk �''�' `:ffC't�.",hqqq�S,�,d S��lii{,: r:,l i{, ""!t IIS L.",'1L I�, t y,i, .,w:al�•' ,,,.�3�1„r. :;i't�t�Ii.:;,`;i•'d�;'S'i,lri:.,n,''f:; at t,i,..�r;'ni,!'ii:.i„4,;Nr.uu - f. :wry,}., _ „}•• .r f,lf t. dl l.tll,'„•.,+)11�.rPu`,• ..�1„q�,:}rrtl�� It�'��',r:i{1t11f1 t:. �br.(4 rt.r n;:'..r,l,'.,_,i• 4 �,,,�nS,•'t'•nc:i �; .0a da .Ji,:ll;z9 . lamrtral 30ELha, F,sr1�4� aI06�{to ,iP :,a;} lb�tp,.i,...� ;5- b 1'r' :'us,r' u•ir, !I ,,S «:;•':. _ -`q r I r. ,, q•, r err t, ,.t tr tl;r!'.: I'1:Cd, )l1 Jn:J )•t 'w1 ,;J!'� .du.'T,„�o-n.i', t";.•r 4';t11i.".•1 n,1;;:;:�"'Ir:.�4:•yF:''i 1Jf ty ::Aber n:;,+;i::` ........ rx�c'!!t i� '•1r ';E'. tj, J Hf^.nt' till,.{i!r! �{, „fit fir; •`�;„�:� .rr r r ':�..•��•:�'::�-:�'S7 'fil Yr...!n{rtR •�!1,,.+;f'1�!{�1{7tS�"J' ?�,w,S,1' ,.� tati ftwewi �' ! , a% �t' :,:.1i.lis n. fv ,.. .kft;{Jd:» '�'.,..».�. '+�.:��� „ay 1G�rcu,P,, ��� :?, "i 4,1 il��at„�,,.ar,i., •.;�-,y�' rt :,.s! j:c»• �„�, ;�;;.tt,:..•:,i "In r, r a.u f,u p t1:J I :te•t ;:r•�.”ii I! „a::.,: ;► .w,!G;.;f7= a;r:Y...�-�r.,,.'�,.� 'd L �1�nh!' f`+�t: j�'�"t;!1'�.h;ti•1 ,�.,,n f.:'r-tu!''t;;"::?:tt;'It•?ru ti;;t�il�. :�':,,t11;�r,. 1. r••• ,;.+..;_„ iVa�ume^:I. I ':r"iE.BVepp��,.0.3.:13rad �((�Y�(1 f4Jr 71"I::,,,u•Q, r, k� , 1 iL,„' .r:,... ,1., Nr /y f,f,,f�..,l�:d•d ... ,,III.Aibdu1 Yt,•�w n,i ._ ...„:.T,:... „t FY.Ta .!t!f(r w' I -'.h,LIJn'{I:�i:,..5.'1if::!.rul k�,i`n„ r�r.”• v, I Yf',�!i' s,�,':;ni;.11`:.,R O, It n•i+' t+�: ;;•iA�.MIr� :} 1 �1: 03 Enter fro^1 ..-,.»,_;...... a•';,,......yl ��,,i;'.,.�”.»,!'.:::.,. tlbl:: BoX must.be:no.:gr`eatec ttian.6:. "v;:;;''! 1•{jf'+ Delta A 0 Added tc vent area when 2<=UD<=6 " C' `}��°'CI'. F 9C7~IO•:..dr,,,��r r• 1�.�,„„y�il w::M�r,�1{t!.. I r(� �I T�/”�d N I'�i.....:tL,:,"'�A 11't'^ar �,`tn+�:.«.�L-'rt;•;:yYri' Vent Area 0.721074486 InterrreCia:e result Ii,�Il l:r•1 li ff1�. t((`�rl",,..��,Y;?J� ,t�, ,,.++1. JI•F.yr•!11.„• •.Jlr�dt�l;,,,. ?' �'{" L iil�ll�n, �t � `' " �r. a �"� ck'r 7du;rt'-"'•q:" •w-'�:. i'1' .r ✓3 Y Vent Area Will be Modified if LiD ratio greater than 2 L ."t4,f1(wrs!t,{�3l 1"'"R•j }�" .� �rt1rt' ��'�s�'t+'i C � 9 t;:'�i� r'r,t 4�IW1;�:•:. DIV/0!: ,Jt'�•?»t'u ,c,-::T';:i :,�L�, and less than 6 for Pred values up to '.5 oar} 713',ecfa u sss>tidfzaF;At'iQa"(a. I r 1 C;Ar:.�;tr �'t ',t,: :a•:;t�,: .�"!^:.7�r '�:.:, r tlo�l�.7r7ti !1(�fl!I r`;{YL'i'rk.•. !�r I.•�t� I'+t •;��'' 1�.:.r. =;•vr,.::f;'' , 'r� '+ly,� .N k ♦;ij,�. ,..��q,ial��i'�1,},1��'�t�;`7:��r.�`_.:.d 1F"'� �.:��.'.�ri rt, �;1,%Srt tlr N � ,u, a:.;;M';�Y ff( - L�:,�tl� .„;�t: EiE•...,:i, Vent Area flraa,.;u;��,cs;� �.�i;:a,I',r,;��:�7"�'st.�(i1�'1;��•�5�3];rL,., ,;..IrJ•;;h:�:09D��4'. I 11 4Lr! .J;�;.C'.f': - -;;1�•;;Sh$,.�ef 1 :'�A,'!1« - ''J6�f u Jt"(J 11!'u i"tl�i��••'-1 ryr '. 3,• ,y:�,r tr.�:•'..:M� n•.`•�)f:t RESULT F1DL'., :i; �l''� fsc� ,:.003.12 '•�"' ,.� � �'f' {:::.... :.:i;. as,N, rx, 1'�l�, ���t::..,.,...�,.»,_•-�r,..;,�:;!:...:.. Note-All results are valid for initial pressure conditions <0.2 bar Box 1 -L/D Calculations C u L n L Page 1 n 1 Lt • ZOOZ U3dVS 'Id.tiXai i 9TTCCQtQnCT 7V4 ab:7T Tn/aniTT Explosion Protection System Components Explosion Vents U Advantages: n ■ Proven design ensures fast, reliable, fail-safe Li operation =_ ■ Complpt'F rgj,aF of vent sizes, configurations and rating. tAiabies custom, leak-tight fitting • s • • • • • • • for each volume to be protected • . • ■ Choice of standard, multi-layered or domed • • • • vents provides the right venting protection . • • L, for each application ■ Vents feature quick installation and low . • ' _ maintenance to help reduce plant operating • . ' L► costs ' • ■ Rugged, stainless steel vent frames with- stand severe industrial environments L Application F1 Fenwal Explosion Vents are designed to minimize 9 damage to process vessels, ducts and other industrial Li structures in the event of a deflagration involving com- bustible materials. They are relief devices that rupture V E at a predetermined pressure to allow the fireball of the deflagration to vent into a safe area. These highly efficient vent panels fit into the walls of a process volume and are available in a variety of sizes, con- figurations, ratings and materials to suit specific appli- cations. Description C Vents are available in round (16 to 60 inches) or exaLos cN veNr rectangular(12x18 to 44.5x68 inches) configurations. ��PLOSICNY_>,, Standard vents feature 316 stainless steel construc- tion. Multi-layered vents in the same rectangular sizes j sandwich a Teflon seal layer between top and bottom sections of 316 stainless steel. CDomed vents, which come in rectangular sizes from 12x18 to 44.5x68 inches, are designed to resist high \� f level vacuum encountered under pressure cycling / E conditions. Unlike conventional flat vents, the burst accuracy of domed vents is unaffected after a million ✓/ pressure cycles from light positive pressure to Evacuum conditions. E FENWAL E . t r Specifications u Standard Vent ulti-Layered Domed Vent Ln ' Panel Design Flat Fla Domed Materials— Frame: Stainless Steel � Stalnles Steel Stalnle s Steel Eor Carbon Steel or Carbon teel or C on Steel I on Stainless Steel Stainless Ste I/ St nless Steel Teflon/Stainles Steel L`n Installation Bolted or Welded Bolted or Welded Bolted or Welded Cycle Life Limited Limited Over 1 Million Burst Pressures— F Minimum: 0.75 psig/0.05 barg 0.75 psig/0.05 barg 0.75 psig/0.05 barg L' Maximum: 5Psi /0.34 barg 5 Psi /0.34 barg psig/0.34 barg Burst Tolerance ±0.25 psig (below 1.5 psi "±0.25 psig (bel w 1.5 psi = .25 psig (belowl.5 psi tolerance) ±0.50 psig tolerance)±0, 0 psig) tol ance) ±0.50 psig (above 1.5 psi tolerance) (above 1.5 i tolerance) (abo 1.5 psi tolerance) Operating Pressure 60%of minimum 60%of mi imum 80% o inimum (�1 tagged pressure rating tagged p essure rating tagged p ssure rating Lin static environment in stati environment in static en 'ronment Temperature Range' '60°F to 400°F 60°F o 400°F 60°F to 3000 (15°C to 204°C) (15' to 204=C) (15°C to 150°C) Vents may be supplied with ceramic fiber applied to vent surface to extend temperature range to 1400'F/760'C Irl FLAT VENT MOUNTING OPTIONS DOMED VENT MOUNTING OPTIONS LSAFETY FRAME FOR BOLTED INSTALLATION SAFETY=FAME FOR BOLTED INSTALLATION SAFETY Y FRAME FOR WELDED INSTALLATION SAFETY FRAME FOR WELDED INSTALLATION U V t_- F Accessories Sanitary Aseptic Option. Domed vents can be Activation Sensor. Domed vents may be fitted n supplied with a smooth internal surface finish with a magnetically activated sensor that will ILu and silicone gaskets for aseptic service in the provide immediate warning of the functioning of food, pharmaceutical and related industries. the explosion vent. n I L Ordering Information Fenwal Vents are designed in accordance with NFPA 68 (Guide for Venting of Deflagrations). Pertinent design information includes: volume of enclosure to be protected; type(s) of material(s) involved; quan- tity, type and size of vents; desired burst pressure; operating temperature; reduced explosive pressure [� and maximum vacuum (if applicable). Consult Fenwal Safety Systems for technical design assistance. This literature is provided for informational purposes only.Actual performance is based on proper application of the product by a qualified professional. l� FENWAL FENWAL SAFETY SYSTEMS 700 Nickerson Road E Marlborough, MA 01752 Tel: (508)481-5800 Fax: (508)485-3115 I 1 FSS-P10-5942M Pnnted in U.S.A. L r i � _. r r , . C Fire Protection Narrative GREATER LAWRENCE SANITARY DISTRICT BIOSOLIDS IMPROVEMENT PROJECT DRYING BUILDING BASIS (METHODOLOGY) OF DESIGN: L, Section 1 - Building Description r a) Building Use Group: L Process Area -Factory and Industrial, F-1 F1 Administration Area Business, B L► Electrical Rm., Equipment Factory and Industrial, F-1 Accessway, Workshop, Secure Storage Rm. Chemical Storage/Feed Rm., Factory and Industrial, F-1 Process Mechanical Rm. E -Silo Rooms 1 and 2 Factory and Industrial, F-1 b) Total square footage of building: L -Factory and Industrial, F-1 10,873 s .ft. Business, B 1,531 s .ft. CTotal 12,404 s .ft. C) Building Height: V Process Area 35 ft. C Administration Area, Electrical 12 ft. Rm., Equipment Accessway, Workshop, Secure Storage Rm. F L, d) Number of floors above grade: 1 r e) Number of floors below grade: None. f) Square footage per floor: 12,404 sq.ft. L g) Type(s) of occupancies (hazards) within the building: Ordinary Hazard Group 2; Extra Hazard for Acid Storage Area and Dust Suppression Oil Storage Area: n V h) Type(s) of construction: 2C E 6960B 1 11/21/01 Z L� l Firewalls: • 1-hour firewall between Use Group B and F-1 spaces (reduced from 2- hour due to sprinkler system). �I • 1-hour firewall between Drying Building and Process & Maintenance Building where distance of separation is less than 20 feet (reduced from 2-hour due to sprinkler system). t, • 3-hour firewall between Acid Storage Area and Drying Building. L, • 2-hour firewall between Dust Suppression Oil Storage Area and Drying Building. i) Hazardous material usage and storage: Natural Gas: u Source: Existing underground Pipeline from Bay State Gas. (� Hazard Rating: Group D Flammable Gas. V Storage: None at GLSD site. Application: Exclusive fuel source for gas-fired-heating systems in Drying Building. Information on heating units �—' follows: � Gas Electric Location Capacity, Heating, Cooling, Tag No. Installed cfrn Btu/hr Btu/hr Area Served AHU-1 On roof 15,000 1,250,000 120,000 Process Area `-' AHU-2 On roof 15,000 1,250,000 120,000 Process Area AHU-3 On roof 3,400 80,000 85,900 Admin. Area Also used as secondary fuel for fired-process equipment (primary fuel for pilot systems). See Digester Gas below for equipment information: Fuel Controls FM or IRI approved. r� Digester Gas: Source: Anaerobic digesters to be constructed under Contract 1 of Biosolids Improvement Project. Hazard Rating: Group D Flammable Gas Storage: None Application: Primary fuel source for gas-fired-process equipment in Drying Building. Information on fired equipment r► follows: U C 6960B 2 11/21/01 Location Rated Firing Tag No. Equipment Installed Capacity, Btu/hr H-lA Furnace for Rotary Drum Dryer, D-IA Process Area 10,000,000' H-IB Furnace for Rotary Drum Dryer, D-1B Process Area 10,000,000 RTO-lA Regenerative Thermal Oxidizer for Process Area 326,7002 Drying Train A RTO-1B Regenerative Thermal Oxidizer for Process Area 326,700 Drying Train B ' Maximum practical rating;maximum total rating 15,000,000 btu/hr. 2 This is the projected firing rate,not the bumer rating Fuel Controls: FM or IRI approved. U n Sodium Hydroxide: Chemical Form: 50% liquid Hazard Rating: Corrosive material V Storage location: Chemical Storage/Feed Room Storage: 300-gallon totes, total amount of 600 gallons. {—► Secondary containment provided by concrete basin. Use Group - Storage Area: Factory and Industrial, F-1 (Mass. SBC 307.8). Exempt for High Hazard, H-3 (Mass. SBC 307.6) n classification because total amount of corrosive storage is 1,000 gallons or less for building equipped with an automatic sprinkling system throughout. Application: Added to scrubbing solution in Building Air Scrubber(BAS-1) as an odor control agent. Sodium Hypochlorite: Chemical Form: 15% aqueous solution Hazard Rating: Corrosive material Storage location: Chemical Storage/Feed Room CStorage: 200-gallon totes, total amount of 400 gallons. Secondary containment provided by concrete basin. Use Group - Storage Area: Factory and Industrial, F-1 (Mass. SBC 307.8). CExempt for High Hazard, H-3 (Mass. SBC 307.6) classification because total amount of corrosive storage is 1,000 gallons or less for building equipped with an automatic sprinkling system throughout. Application: Added to scrubbing solution in Building .Air Scrubber(BAS-1) as an odor control agent. 6960B 3 11/21/01 C E ESulfuric Acid: n Chemical Form: 93% liquid Hazard Ratings: Corrosive material Water Reactive material - Class 2 FI Toxic material U Storage location: Acid Storage Area(Outside, but covered) Storage: (1) 4,000-gallon tank with built-in secondary n containment well. V Use Group - Storage Area: Not applicable (outside storage). Application: Added to Scrubber/Condensers (SC-IA, SC-1B) or r� mixers (M-IA, M-IB) for NOx (air pollution) u control. r Dust Suppression Oil: Chemical Form: Liquid - Assume material equal to Dustrol 3010 by n Arr-Maz (See attached MSDS). L Hazard Ratings: Combustible Liquid - Class M Storage location: Dust Suppression Oil Storage Area (Outside) Storage: (1) 5,800-gallon tank with built-in secondary containment well. Use Group - Storage Area: Not applicable to outside storage. nApplication: Added to control dust during product loading from silos to trucks. High storage commodities within a building over 12-ft: Product Storage n r V Material: Dried, granular biosolids fertilizer. Hazard Rating: Combustible Solid. F1 Storage location: Silos 1 and 2 (Outside) Storage: (2) 14,000 cu.ft. silos. Product cooled prior to F1 transfer to silos. Silo may be inerted through LI nitrogen addition. Silos have deflagration and pressure/vacuum vents built into roof. r' Use Group - Storage Area: Not applicable to outside storage. Application: Product storage prior to shipment Lj k) Site access arrangement for emergency response vehicles: The Drying Building will be located at existing GLSD wastewater treatment facility located at the end of Charles Street. The GLSD site has one main access road. The Drying n Building will be located on a loop that can be accessed from either direction in case of an emergency. See Overall Site Plan on Dwg. C-2. 6960B 4 11/21/01 ESection 2 - Applicable Laws and Governing Codes: a) Massachusetts Fire Prevention Code th b) Building Code: Massachusetts Building Code 6 Edition r c) Referenced Standards: NFPA - 1 10 13 14 24 25 68 69 72 86 86C 86D Lj 90A, 497, 499, 654, 704, 820. Fl Lj d) Authority Having Jurisdiction: Town of North Andover, Massachusetts r Section 3 - Desian Responsibility for Fire Protection Systems Wright-Pierce is the Engineer of Record. Wright-Pierce is providing a partial design and specifying the design criteria for the installing contractor who will finalize the system L layout, and will provide calculations to conform to the design standards. Wright-Pierce will review and approve the installing contractor's final layout and calculations. Li u Section 4 - Fire Protection Svstems to be Installed a) General: The building will be a fully sprinklered Ordinary Hazard Group 2 Ls occupancy building. The facility will have two small chemical storage areas that will be sprinklered at an Extra Hazard density. The facility includes two identical drying trains that will each include a variety of fire suppression systems as described below. M b) Water Supply, fire mains and hydrants: The Public Works Department reported L that recent fire flow test on April 30, 1997 indicated a flow of 3,090 gpm at a static pressure of 134 psi at the hydrant at the end of Charles Street. The residual pressure was 102 psi. The Drying Building will have a separate 6" fire main entrance from a new 8" water main as shown on Dwg. C-6. Hydrants will be n located near the southwest and northeast corners of the Drying Building. I C) Sprinkler System: r 1) The Dryer Building will be completely protected by an Ordinary Hazard L Group 2 wet automatic sprinkler system, except a dry system will be provided for the Acid Storage Area, Dust Suppression Oil Storage Area, Silo Rooms 1 and 2, and at the entry of the cake conveyor, C-1, into the Lj building. The sprinkler density in the Acid Storage Area and the Dust n Suppression Oil Storage Area will be Extra Hazard. The sprinkler system LI will be fed by a 6-in. fire service in the Workshop. The fire service entrance will go to a reduced pressure zone backflow preventer and then to a 6-in. sprinkler alarm valve. From the sprinkler alarm valve, a 6-in. fire Eline will feed the sprinkler riser located in the Workshop. The riser then will feed the sprinkler branches and heads. E 6960B 5 11/21/01 F V E 2) Automatic Sprinkler Design Criteria: The sprinkler heads used throughout the building are to be %Z-in. standard orifice, K-factor=5.6, lead type wax- coated. The design density for the Ordinary Hazard Group II areas (all areas inside the building) is to be 0.20 gpm/sq.ft. over the most remote L' 1,500 sq.ft. per NFPA 13 plus a 250 gpm hose stream allowance for a total design flow of 550 gpm. For the Acid Storage Area (area=288 sq.ft.) and Cfor the Dust Suppression Oil Storage Area (area = 225 sq.ft), the design density shall be 0.30 gpm/sq.ft plus a 500 gpm hose stream allowance. The Extra Hazard areas control the sizing of the fire service entrance with a design flow of approximately 590 gpm. 3) There is one (1) zone controlled by the sprinkler alarm valve assembly n located in the Workshop. f4 4) Fire Department inlet connection will be a Siamese type. 5) Water or electric Motor Gong will be mounted on the outside wall of the building. L 6) All fire service entrance block valves will be provided with a Tamper Switch to monitor the valves. rr 7) Low pressure switch set a 20 psi will be located on the fire service L upstream of the reduced pressure zone backflow preventer. Fd) Fire Alarm Systems and Components: Lj 1) The fire detection system will be an extension of an existing Simplex 4005 �? system to the new Drying Building. The system provides supervised initiating device and audio and visual alarming circuits. The equipment will meet local and state requirements. The Drying Building will have a separate control panel located in the Workshop and that panel will Li communicate with the existing GLSD Fire Alarm Control Panel. 2) The equipment is UL listed for fire alarm signaling use and consist of a NAC power extender with battery, manual pull boxes, alarm notification u appliances, heat detectors, smoke detectors, and sprinkler system valve supervisory switches. r' 3) Upon activation of any manual pull station, automatic detector or sprinkler alarm flow switch, the Fire Department will be notified via the existing main fire alarm control panel. The audible and visual alarm indicating appliances including the building's exterior mounted beacon will operate under an alarm condition. The audible alarm appliances will sound the standard evacuation tone and visual alarms flash until alarm initiating devices have been restored to normal and the reset switch located in the L' fire alarm control panel has been actuated. Upon acknowledgement, the alarm light will light steadily and the audible will silence. Subsequent alarms will re-initiate this sequence. 4) The system will have standby batteries capable of operating the fire alarm control panel for 60 hours with a five-minute alarm at the end of the 60- hour period. Li r L 6960B 6 11/21/01 n u n 5) Fixed heat (135°F and 200°F) detectors will be located in each room in the Administration Area, Electrical Room, Workshop, Equipment Accessway, Secure Storage Room, Process Mechanical Room, and Chemical Storage/Feed Room. Duct smoke detectors will be provided on the supply and return ducts of the ventilation system in the Process Area in accordance with NFPA 90A. The ventilation system will be shutdown C; upon activation of the associated duct smoke detector. 6) Pull stations will be located at building egresses. 7) Flow and tamper switches will be located at the fire protection piping serving the Drying Building. Tampering with any of the supervised control valves will flash a supervised signal at the fire alarm control panel. 8) Each device will be tested for proper operation and a certificate report submitted indicating date of testing and signature of the personnel that performed the test. Final connections in the system will be made under the direct supervision of an authorized representative of the manufacturer. The entire system will be tested with a representative of the fire department present. r e) Manual suppression systems: Fire extinguishers will be the dry powder type, UL u approved and rated for Class A, B, and C fires located in accordance with NFPA E 10. f) Kitchen cooking equipment and exhaust systems: A kitchenette unit will be r7 provided in the combination Lunch Room/Conference Room in the I Administration Area. An exhaust fan will be provided from the stove unit to the outside. n ID) Emergency power equipment: The entire GLSD site is served by a dual-service electrical power supply. The Drying Building will have dual feeders from each power supply. Each feeder will be capable of maintaining the operation of a u single drying train plus all house loads. The house loads will automatically be transferred to the alternate power supply in the case of a power outage from the (-� active source. This will ensure back-up power supply.for alarm systems and the Li ventilation system. h) Hazardous material monitoring equipment: 1) Combustible Gas Detection: A combustible gas detector will be provided rat each piece of digester gas-fired process equipment (the two furnaces for '—' the two rotary dryer systems and the two regenerative thermal oxidizers). n In addition, a combustible gas detector will be supplied in the Digester Gas Vault. 2) Ventilation System Monitoring: A flow measurement device will be n mounted in the exhaust duct. Upon failure of the exhaust fan, the drying LI system will be deactivated; the digester gas feed to the building will be shutdown through the automatic shutoff valve in the Digester Gas Vault; n L 6960B 7 11/21/01 E u and the natural gas feed to the Process Area will be shutdown through an automatic shutoff valve. i) Drying Process Fire Protection: 1) Both manual and automatic water quenches will be provided in dryer inlet. High temperature in the process air will automatically trigger the main dryer quench system. A manual push button in the control room also will activate the main dryer quench system. 2) Circulating process air in the drying system results in the development of an inert carrier gas within the furnace, dryer, separator, scrubbers, r ductwork, RTO and main fan during normal operation. L 3) Deflagration relief vents (pressure relief) at the separators will be provided. Vents will relieve directly to a safe location outdoors, 4) Deflagration relief vents (pressure relief) at the recycle bin will be provided. These vents simultaneously relieve pressures within the baghouses, and crusher. Vents will be ducted to a safe location outside the F building. 5) Nitrogen addition maintains oxygen-free storage conditions to limit chemical oxidation that can lead to self-heating in the silos and recycle F bins. Multiple temperature element strands monitor temperature ,j throughout each recycle bin (one strand with 3-5 elements) and silo (three strands of>10 elements each) and alarm at high temperature condition. r 6) All equipment and ductwork handling the dried product will be electrically bonded andgrounded to limit the potential for electrostatic discharge ignition. r 7) All instrumentation on process equipment that potentially may contain dust will be intrinsically safe for the portion of the instruments which intrude into or come into contact with the process stream (e.g. sensors). r 8) Dryer furnace and RTO system automatically purges prior to ignition of burners. SEQUENCE OF OPERATION: Lj Section 1 - Sprinkler System: EWhen a single heat activated sprinkler fuses and discharges water, the pressure switch at the sprinkler alarm valve located in the Workshop will be activated, and will send an alarm signal to the fire alarm control panel. Lj Section 2 - Fire Alarm System: `•i a) The operation of a manual station or activation of any automatic alarm initiating device (system, smoke, heat, water flow,pressure switch)will automatically: E1) Initiate the transmission of an alarm to the Municipal Fire Station via the existing GLSD Fire Alarm control panel. rti f 6960B 8 11/21/01 r V 2) Activate audible alarm signals. `-' 3) Activate visual alarm signals throughout the alarmed area. 4) Sounds the alarm and visually indicates the building in alarm at the existing fire alarm control panel (FACP) located in the main electrical distribution building and at the remote annunciator (FA) in Control Room 205 of the Process Building. When the alarm is acknowledged, the audible signal is muted, but resounds on a subsequent alarm. 5) Activate an outside weatherpr000f beacon. r 6) Initiate automatic shutoff of natural gas and digester gas feed lines. b) Tampering with any of the supervised control valves will display a trouble signal Eat the FACP. TESTING CRITERIA: Section 1 - Sprinkler System: a) Notify the Authority Having Jurisdiction and the Authority's representative of the time and date of the test. F1 b) Test the Wet Piping system for 2 hours at 200 psi per NFPA 13, Section 8-2.2.1. u C) Water flow detecting devices including the associated alarm circuits will be flow r tested through the inspector's test connections to result in an alarm on the L, premises within 90 seconds after such flow begins. Section 2 - Fire Alarm System: a) The system will be fully tested by a UL-certified testing company in accordance r with UL guidelines and NFPA standards. Each and every device shall be tested. Provide a copy of NFPA Record of Completion documentation to Fire Marshall prior to Fire Department walk-through. At a minimum, perform the following tests: 1) Close each sprinkler system flow valve and verify proper supervisory alarm at the FACP. 2) Verify activation of flow switches. 3) Open initiating device circuits and verify that the trouble signal actuates. 4) Open and short signaling line circuits and verify that the trouble signal L' actuates. n 5) Open and short Notification Appliance Circuits and verify that trouble signal actuates. 6) Ground all circuits and verify response of trouble circuits. 7) Check presence and audibility of tone at all alarm notification devices. C8) Check system reset features. n I ' 6960B 9 11/21/01 U E F Section 3 - Approval Requirements: A copy of the final test report and UL certification will be submitted indicating proper F functioning of the system and conformance to the specifications. The test will be Lj performed by UL-certified and factory-trained technicians. Each and every device will be tested, and stand alone operation of remote panels will be verified. UL certification will be performed by the same company that will hold and execute the Test and L' Inspection Contract. MAINTENANCE TESTING is General n The responsibility for properly maintaining a water-based fire protection system shall be that of 1 the Owner of the property. By means of periodic inspections, tests, and maintenance, the equipment shall be shown to be in good operating condition, or any defects or impairments shall n be revealed. Inspection, testing and maintenance shall be implemented in accordance with procedures meeting or exceeding those established in NFPA 25 and NFPA 72 and in accordance with manufacturer's instructions. These tasks shall be performed by personnel who have developed competence through training and experience. The Owner or Occupant shall notify the Authority Having Jurisdiction, the fire department, if r,. required, and the alarm receiving facility before testing or shutting down a system or its supply. L; The notification shall include the purpose for the shutdown, the system or component involved, and the estimated time of shutdown. The Authority Having Jurisdiction, the fire department, and the alarm receiving facility shall be notified when the system, supply or component is returned to L, service. (� The Owner or Occupant promptly. shall correct or repair deficiencies, damaged parts, or impairments found while performing the inspection, test, and maintenance requirements. Corrections and repairs shall be performed by qualified maintenance personnel or a qualified contractor. Lj Section 1 - Sprinkler System Ea. Routine inspection, testing and maintenance of the sprinkler system shall be in accordance with NFPA 25, Chapter 2. Inspection shall include, but not be limited to: I 1. Sprinklers Annually u 2. Pipe and Fittings Annually 3. Hangers and Seismic Braces Annually f 4. Gauges Monthly 5. Building Annually 6. Alarm Devices Quarterly E7. Hydraulic Name Plates Quarterly 8. Hose Connections Annually � 1 V 6960B 10 11/21/01 1 M L b. Testingshall include but not be limited to: , 1. Sprinklers Every 10 years after initial 50 years I 2. Gauges Every 5 years L 3. Alarm Devices Quarterly 4. Hose Connections Every 3 years after initial 5 years Section 2 - Private Fire Service Mains a. Routine inspection, testing and maintenance of the fire service main and appurtenances shall be in accordance with NFPA 25, Chapter 4. Inspection shall include, but not be limited to: y 1. Hydrants Annually L b. Testing shall include,but not be limited to: 1. Piping Flow Test Every 5 years 2. Hydrants Annually n Section 3 - Fire Alarm System Li Routine inspection, testing and maintenance of the fire alarm system shall be in accordance with r NFPA 72, Chapter 7. Frequency of inspection and testing of individual components shall be in L1 accordance with NFPA 72, Tables 7-3.1 and 7-3.2. v r Lj r r C E r� 6960B 11 11/21/01 E f r n U ' �' 111Wright-Pierce MEMORANDUM L, `i TO. File DATE: 6 October 1999 C Rev. 26 Dec. 1999 2nd Rev. 13 Jun. 2001 3`d Rev. 21 Nov. 2001 FROM: Jeffrey R. Pinnette/Melissa A. PROJECT No.: 6960C `—' Hamkins SUBJECT.- GLSD Biosolids DryingFacilityLj Hazard Assessment and Control Plan The following provides our assessment of potential hazards at the proposed GLSD Biosolids Drying Facility and the process, fire protection, electrical, and building system features that will be included in the design to address these potential hazards. While the proposed design addresses these potential hazards and is expected to provide a safe facility, it is important to document the issues so that all parties can agree that the iJ appropriate level of control has been incorporated into the design. The hazard assessment addresses issues related to the following: U • Drying process n • Fuel Use -Digester and Natural Gas • Chemicals u _ The drying process will be housed in the Process Area of the proposed Drying Building. Digester gas will normally be used for the dryer furnaces and regenerative thermal oxidizers, which are located in this Process Area. Chemical storage and handling will be n isolated from the Process Area with the exception of feed lines into the tray scrubbers and f odor control scrubber. v DRYING PROCESS `J Because dried biosolids (sludge) are combustible, the drying process has potential for a fire or deflagration. Furthermore, dried biosolids can also be unstable in storage. Fires are an easily recognized potential hazard when processing combustible materials. Less well recognized is the fact that ignition of combustible dust can cause a deflagration. A �-� deflagration is defined as an exothermic reaction in which the reaction progresses at a vrate less than the velocity of sound. If a deflagration occurs, and if the containing vessel ruptures as a result, the event is referred to as an explosion. The NEFCO design for the GLSD biosolids drying facility addresses fire and deflagration risks through a systematic evaluation of potential hazards and inclusion of control n r n Li Memo to File 11/21/01 C Page 2 mechanisms primarily oriented at preventing problems from occurring. Table 1 is a comprehensive summary of the potential fire and deflagration risks for each step in the drying process and the control measures incorporated into the system design. Some of the key measures to inhibit and/or control fire and deflagation events are as follows: n • Use of a recirculating process air system in the drying system, which provides an inert carrier gas through the dryer, separator, and main fan. The minimum oxygen content that can still support a deflagration is a function of the temperature of the gas and its composition. In general, 10% oxygen or less will not support a deflagration, even at elevated temperatures. The oxygen concentration in the recirculating process nair is expected to be less than 10%, and therefore under normal circumstances a deflagration is not possible in the dryer or separator. The oxygen concentration required for a sludge dust deflagration is 17% at room temperature. • Use of a nitrogen blanket in the silos and in the recycle bins when the recycle bins are not processing. Nitrogen addition maintains oxygen-free storage conditions to limit chemical oxidation that can lead to self-heating. Multiple temperature element strands monitor temperatures throughout each recycle bin (one strand with 5 L' elements) and silo (three strands of 15 elements each) and alarm at high temperature condition. The recycle bins are vented, and the roof of the silos is designed to part at Ethe top seam during a deflagration. • Use of manual and automatic water quenches in dryer inlet. High temperature in the process air leaving the separator will automatically activate the main dryer quench system. A manual push button in the control room also will activate the main dryer quench system. A mini-quench system will allow the operators to manually cool the dryer without activating the main quench system. • Control of the feed to the drying system to ensure that dried material is not recycled LA back to the feed mixer unless wet cake is also present. Operation of the recycled C product conveyor requires a permissive signal from the belt scale of the biosolids feed conveyor indicating that wet cake is being fed to the dryer feed mixer. • Ensure furnace air is mixed with recirculated process air to keep dryer inlet f� temperature below 1,000°F. Use 90° bend between burner and dryer to mix the combustion products with recirculated air to prevent hot gas stratification. The draft switch for the main fan verifies flow of recirculated process air. • Provision of a deflagration vent (latch-type pressure relief device) at each separator. L+ Vent to relieve directly to a safe location outdoors and not inside the building. • Provision of a deflagration vent (diaphragm-type pressure relief device) at each recycle bin that relieves the recycle bin, baghouse, and crusher. Duct vent to relieve L to a safe location outside the building and not inside. In addition, the following measures are not shown in Table 1, but will be implemented for all processing equipment: E • All equipment and ductwork handling the dried product will be electrically bonded and grounded to limit the potential for electrostatic discharge ignition. 6960C u n Memo to File 11/21/01 7 Page 3 Li • All instrumentation on process equipment which handle dust will be intrinsically safe �? for the portion of the instruments which intrude into or come into contact with the process stream (e.g. sensors). Finally, the following features will be implemented to prevent any in process problems with the fuel gas supply. Additional aspects addressing fuel gas issues are addressed under Fuel Use below. P Li • Design of both digester gas and natural gas supply trains to the dryer furnaces and RTOs to meet FM or IRI standards. • Dryer furnace and RTO system purges prior to ignition of burners. �., The NEFCO design for the GLSD Biosolids Drying Facility provides sufficient protection from dust-related fire and deflagration risks such that it is not necessary to rate the process area as a hazardous area either for electrical classification or building n classification. The design incorporates some form of explosionproofing at all drying system components, except the vibrating screeners, which are exempt under NFPA 654. `—' A primary protection method is through oxidant concentration reduction, which is an approved method under NFPA 69. Deflagration vents will be provided as a supplement at the separator and as the primary protection for the recycle bin, crusher, and dust collector. n Electrical classifications have been evaluated under National Fire Protection Association (NFPA) and National Electric Code (NEC) criteria to determine the need for either Class II, Division 1 or 2 rating. The building use classification has been evaluated under the Massachusetts State Building Code to determine whether a high hazard (H-2) classification is warranted because of the materials present. The design criteria for the Process Area call for an electrical enclosure rating of NEMA 4 — water tight and dust tight with totally enclosed fan cooled motors rated for mill and chemical duty. The building use classification is Factory 1 (F-1) under the Massachusetts State Building n Code. Fire protection measures for the process area will include a fire suppression L system (automatic water sprinkling system), fire alarm system, and hydrant protection. E Electrical Classification. In determining the electrical classification for the process area, NFPA guidelines provide recommendations for classifications of various types of spaces, while the NEC describes the specified electric equipment options to meet these n classifications. NFPA 820 provides recommended practice for fire protection and L, electrical classification of wastewater treatment facilities. The 1999 edition (supplement 2) includes a recommendation in Table 4(b) for an electrical rating for the entire room enclosing a sludge drying process as Class II, Group G, Division 1. However, Table 4(b) allows the classification to be determined using the provisions in NFPA 499. NFPA 499 provides the recommended practice for classification of combustible dusts and of (� hazardous locations (classified) for electrical installations in chemical process areas. L, NFPA 499 provides the basis for electrical (and building) classification of a building space holding processing equipment with the potential to release combustible dust. u 6960C u Memo to File 11/21/01 Page 4 I U r Using the criteria in NFPA 499, sludge dust is classified as Group G, which is the lowest 1_, hazard rating for combustible dusts. Under NFPA 499, an area should be rated as Division 1 if a dust cloud is likely to be present under normal conditions, which should include conditions that can develop during routine maintenance and repairs. If the area can develop a dust layer greater than 1/8 in. (3 mm) in depth in a 24-hour period, it should be classified Division 1. Because of features incorporated in the design, the (, proposed facility will not exceed this criterion (and in fact will not exceed the criteria for Division 2 classification as discussed below). The process will not release significant dust during operations because: I • All processing equipment is enclosed and sealed to provide dust containment. • As a further precaution, the entire drying process is maintained under a slight vacuum. • The recirculating air system for the dryers is maintained under a slight vacuum by varying the exhaust air rate based on a pressure sensor at the inlet of the furnaces. C • The solid handling trains, including the crushers and screeners, are maintained under vacuum by the dust collection systems. • A high rate of ventilation (6 air changes per hour) has been provided in the building via the odor control scrubber. C Under NFPA 499, an area should be classified as Division 2 if it is likely to have ignitable dust suspensions or hazardous dust accumulations under abnormal conditions. "Abnormal" is meant to encompass conditions that might reasonably be anticipated to develop, such as the release of dust from an enclosed piece of equipment due to wear. This requires careful evaluation of prior experience with the same or similar installations. The proposed facility is similar to the MWRA facility in Quincy, Massachusetts and has r similar provisions to a new facility in Shakopee (Minneapolis), Minnesota. The electrical L, equipment at the MWRA facility, the Minneapolis facility, and similar biosolids drying facilities in the U.S. have not been rated as either Division 1 or Division 2. The operating experience at these facilities indicates that Division 2 classification is not necessary. NFPA 499 also includes a guideline for establishing the potential for hazardous accumulations of dust under abnormal conditions that could justify a Division 2 rating. If L+ a process results in accumulations of less than 1/8 in. but great enough that the surface color is not discernable in a 24-hour period, Division 2 rating is warranted since there is r the potential for dust build-up. The proposed facility will not exceed this criterion because: • Processing equipment is enclosed L' • Dust collections systems are provided • A high rate of building ventilation has been provided (6 air changes per hour). • Cleaning and housekeeping will be made a part of the standard O&M procedures mirroring practices that have been successfully implemented by NEFCO at the Quincy facility. n 6960C L, Memo to File 11/21/01 C Page 5 u An important consideration in the potential for "abnormal" releases of dust is any �? portions of the process that operate under pressure. The only pressurized components Li, within the building that may include combustible solids are exhaust ducts from the process air fans to the tray scrubbers, a distance of less than 10 feet, and the pneumatic Econveying systems. These two process components will be robustly constructed and tightly sealed to prevent dust release and inspected regularly. The duct between the main fan and the tray scrubber does not contain significant dust, since it is downstream of the separator cyclone. As previously noted, the duct from the process air fan to the tray scrubber inlet is protected n by the recirculating air system that maintains the oxygen level below the explosive limit under almost all conditions. The pressure pneumatic conveying system is not considered a risk to release significant dust because dust has been removed in the screener leaving a Egranular product that does not represent a deflagration hazard. Another consideration for an "abnormal" release is the location of discharge of any relief vents. As noted above, the process includes two relief vents per train, one at each separator and one at each recycle bin. The separator vents are located outside on the roof of the building and discharge in a safe direction (upward). The recycle bins are located adjacent to the west wall of the Process Area and relieve through a short duct to the L' outside (above the roof level for the administrative area). This duct has been designed to comply with requirements in NFPA 68. Thus, all relief vents discharge to the outside and not into the Process Area. It should also be noted that the roof of the silos will act as a relief vent, and these will also discharge outside. Because of the comprehensive features that have been included, the GLSD Biosolid Drying Facility does not require electrical equipment rated as either Division 1 or 2 for n combustible dust (Class II). The process equipment operates primarily under a slight u vacuum avoiding discharges of dust to the Process Area. The process design incorporates a variety of features that cause the potential for a deflagration to be extremely low. In the F remote possibility that a deflagration were to occur, the design incorporates relief vents to L, the building exterior rather than the Process Area. Consequently, it will not be necessary to provide explosionproof rated electrical equipment in the Process Area, because the r design is intended to preclude the possibility of sufficient quantities of dust being present under either normal (Division 1) or abnormal (Division 2) conditions. The electrical equipment in the Process Area will use NEMA 4 enclosures (watertight and dust-tight) nand motors will be totally-enclosed-fan-cooled chemical- and mill-duty u Building Classification. The Massachusetts State Building code provides guidance for a high hazard use rating (H-2) for an area where combustible dusts are present as follows: 6960C CMemo to File 11/21/01 Page 6 u "A dust explosion potential is considered to exist where 1 pound or more of F'► combustible dust per 1,000 cubic feet of volume is normally in suspension or (J could be put into suspension in all or a portion of an enclosure or inside pieces of equipment. This also includes combustible dust which accumulates on horizontal surfaces inside buildings or equipment and which could be put into suspension by an accident, sudden force or sudden explosion." This criterion corresponds to 7 gr/dscf and is much more severe than the criteria reviewed above for electrical classification. As noted above, the proposed GLSD design is not expected to release significant dust during normal operations and only minimal quantities of dust during maintenance and repair. The process, itself, includes extensive fire and deflagration prevention measures. In addition, relief vents have been provided where appropriate to direct any potential discharge to outside of the building. Based on these E process provisions summarized in Table 1 and discussed in more detail above, the building use classification will be Factory (F-1). Table 4(b) in NFPA 820 addresses requirement for sludge drying processes and calls for the building to be constructed of non-combustible materials and to be equipped with a fire suppression system, a fire alarm system, and hydrant protection. All of these requirements will be complied with. The building will be constructed with steel framing Li and roof deck and pre-cast concrete wall panels. Interior partitions will utilize masonry n or gypsum wallboard with steel studs. The building will be fully sprinklered meeting the requirements of Ordinary Hazard Group 2. In addition, the building design will comply with typical life safety requirements including egress pathways, emergency lighting and lighted exit signs. Lightning protection will be provided and tied into the building Egrounding system. n Additional considerations associated with fuel and chemical uses at the facility are addressed below. u FUEL USE - DIGESTER AND NATURAL GAS The proposed biosolids drying facility will use digester gas as the primary fuel for the dryers and for the regenerative thermal oxidizers (RTOs). The digester gas will be supplied by new anaerobic digester facilities that are being constructed concurrent with the drying facility project as part of an overall upgrading of the GLSD biosolids processing facilities. Natural gas will serve as the back-up fuel for both applications and will serve as the primary fuel for space heating requirements. The gas trains,to the dryer furnaces, RTOs, and heaters will be designed to meet FM or IRI standards. VBoth digester gas and natural gas have the potential for fire and explosion hazards that are addressed in NFPA 820, which covers recommended practice in wastewater treatment Efacilities. Additional guidance is provided in NFPA 497, which covers recommended practice for electrical installations in locations with flammable liquids, gases, or vapors. 6960C U Memo to File 11/21/01 Page 7 The recommended practice for anaerobic digesters and the use of digester gas is n addressed in Table 4(a) in NFPA 820. The use of digester gas in this application falls L; under Item 16 "Anaerobic Digester Control Building - Storage, handling, or burning of sludge gas." More specifically, this application appears to fall under the requirements in Item 16(c), which requires a physically-separated space and continuous ventilation at 6 air changes per hour, which is the design ventilation rate for the Process Area. Based on these conditions, Table 4(a) provides recommendations for materials of construction, fire n protection measures, and electrical classification. Li The materials of construction are recommended to be a minimum of low-flame-spread material and are superceded by the requirement for non-combustible material for a sludge drying process in Table 4(B) as noted above. The recommended fire protection measures include combustible gas detection, hydrant protection and portable fire extinguishers. Again, the requirements for a sludge drying process in Table 4(b) are generally greater requiring both a fire suppression system (water sprinklers) and a fire detection system. Nevertheless, combustible gas detectors will also be provided at each of the four n locations using digester gas and in the digester gas vault. Portable fire extinguishers also L will be provided throughout the facility. In terms of electrical classification, Item 16(c) indicates that it is not necessary to classify V the application as Class I, Group D, Division 1 or Division 2. This is further reinforced in NFPA 497, which defines 6 air changes per hour as typically providing adequate n ventilation to avoid the build-up of significant quantities of flammable vapor. L� The digester gas lines are intended to slope continuously upward from the digester r� building to the drying building to remove condensate. Prior to entering the drying �-' facility, the digester gas line will pass through a vault with a condensate accumulator tank (with automatic drip trap) and automatic gas shutoff valve. This underground vault will only be ventilated intermittently and will be rated Class I, Group D, Division 1. Inside the Process Area, digester gas will be routed from underground up to ceiling level and then down to each of the four use points. The digester gas lines will slope back to the digester gas vault until the point that they drop to the four application points. Natural gas meters will be provided for the overall facility inlet as well as the individual lines for the building heat and hot water; the feed to the two dryers; and the feed to the two RTOs. These meters will be located outside. In addition to the process application n points, natural gas will be used for heating throughout the facility. This includes one Lroof-mounted air handling unit for the administrative and support spaces, two roof- mounted air-handling units for the process area, and a water heater located in the �-, workshop. NFPA 820 requires that any ventilation systems that must operate to maintain the desired r classification should be connected to an alternate backup power source and should be L, fitted with flow detection devices to indicate ventilation system failure. Back-up power will be provided through GLSD's dual electrical service entrance. The facility electrical E 6960C CMemo to File 11/21/01 Page 8 V power will be distributed through three MCCs. The equipment associated with each dryer train will be located on individual MCCs. All of the remaining loads will be L, located on the "House" MCC, which can be powered through either of the duel power feeds. A flow detection device will be included with the main exhaust fan. If the flow switch at the main exhaust fan does not indicate flow or in the case of the failure of both power sources, the process will be shut down and the digester gas and natural gas feeds shutdown through automatic shutoff valves. r Li CHEMICAL STORAGE n The biosolids processing facility will utilize four chemicals: sodium hydroxide, sodium L hypochlorite, sulfuric acid, and dust suppression oil. Each of these materials presents certain hazards for storage and handling. Table 2 summarizes the chemical hazard ratings for each material determined in accordance with Massachusetts State Building Code (Mass. SBC) using the Hazardous Materials Classification Guide (1993) as a primary means of identifying hazard concerns. Table 2 identifies the maximum concentration of each chemical that will be used and the proposed on-site storage capacity. Table 2 also shows the amount of storage that is exempt from requiring a high hazard rating under the Mass. SBC and the use code for the control area for each F) material. The chemical storage provisions described below are based on the requirements of the Mass. SBC, but most of the specific design requirements were determined from the BOCA National Fire Prevention Code/1999. Sodium Hydroxide. Sodium hydroxide (50%) will be added to the odor control scrubber to enhance the absorption of hydrogen sulfide into the aqueous scrubbing solution. Sodium hydroxide will be stored in the same control area as sodium hypochlorite, the L' Odor Control Chemical Storage/Feed Room. Sodium hydroxide will be stored in 300- r gallon totes with a maximum of two totes or 600 gallons of storage. A built-in containment basin will provide secondary containment. Sodium hydroxide is rated as a corrosive hazard. Because the space will be equipped v with an automatic sprinkler system, up to 1,000 gallons can be stored without a high hazard rating. Sodium Hypochlorite. Sodium hypochlorite (15%) will be added to the blowdown stream from the odor control scrubber to oxidize absorbed compounds such as hydrogen r sulfide. Sodium hypochlorite will be stored in the same control area as sodium Li hydroxide, the Odor Control Chemical Storage/Feed Room. Sodium hypochlorite will be stored in 200-gallon totes with a maximum of two totes or 400 gallons of storage. A built-in containment basin will provide secondary containment. u Sodium hypochlorite is rated as a corrosive for solutions up to 15% aqueous. The total amount of storage in the Odor Control Chemical Storage/Feed Room will be limited to 1,000 gallons of chemicals (sodium hydroxide and sodium hypochlorite) that are rated only as corrosive hazards. This meets the exemption criteria for rating the storage area as E 6960C r m L r L Memo to File 11/21/01 Page 9 a high hazard as long as a sprinkler system is included. Consequently, this room will be rated as F-1. Sulfuric Acid. Sulfuric acid will be added to the scrubbing solution in the Tray �l Scrubber/Condensers to remove ammonia from the process air. Sulfuric acid will be ;i stored outside in a 4,000-gallon tank. The facility will use exclusively 93% sulfuric acid to allow storage outside. Ninety-three percent sulfuric acid has a freezing temperature of —29°F. This concentration also allows a variety of material choices including high- density-cross-linked polyethylene (HDXLPE), which is suitable for solutions less than 98%; uncoated carbon steel, which is suitable for solutions from 93% to 98%; and coated carbon steel, which is suitable for any concentration depending on the coating. Storage will be provided by a horizontal, coated-carbon-steel or HDXLPE tank with top entry piping penetration and secondary containment tub. To provide the necessary suction lift, peristaltic or diaphragm chemical feed pumps will be used. The chemical feed pumps Li will be mounted on the outside wall adjacent to the storage tank. The tank and pumps will be located under an attached canopy. n Sulfuric acid has a hazard rating as a corrosive, a Class 2 water reactive and a toxic material. Under BOCA, outside storage of a corrosive material requires secondary containment for quantities exceeding 1,000 gallons. (The Mass. SBC does not Li specifically address many hazardous chemical issues, but refers to BOCA.) A "built-in" f containment tub will provide the required secondary containment. In addition, outside storage is not permitted within 25 ft. of an interior lot line, public way, exit discharge, or L' exterior wall opening, unless a 2-hour fire separation wall is provided extending not less n than 30 inches above and to the side of the storage area. The 2-hour firewall will be Ii LJ provided to ensure that exit doors are not impacted. n Outside storage appears to be favored in this application. As a Class 2 water reactive L material, outside storage or a detached non-combustible storage building is required when storage exceeds 50,000 pounds, which corresponds to approximately 3,200 gallons of n sulfuric at 93%. The proposed storage capacity of 4,000 gallons is provided in order to receive full truckloads of 3,000 gallons. Class 2 water reactives have the same setback U requirements as corrosives, which can be addressed by providing the proposed 2-hour firewall. Class 2 water reactives also require drainage and secondary containment. Although the containment tub provides secondary containment, a curbed area will also be provided around the tank for drainage control. The drainage system will discharge to the sewer drain from the Drying Facility to the headworks of the treatment plant. n The secondary containment will not drain to sewer, but only to a sump within the containment. Any sort of small-scale leak will be addressed by pumping the sulfuric into either the tray scrubber or the odor control scrubber. For a large-scale leak, a hazardous material handler, such as Clean Harbors, will be used to remove the sulfuric from the tank and/or secondary containment tank. Class 2 water reactives are required to have n n 6960C i U Memo to File 11/21/01 Page 10 LJ weather protection for the storage area. This will be addressed by the providing a canopy Gover the outside storage area. As a toxic material, the sulfuric acid triggers many of the same requirements as corrosive j� and Class 2 water reactive materials including those for secondary containment and ( , setbacks/firewall requirements. If an attached canopy is used for weather protection of the secondary containment, an automatic sprinkler system is required. A dry-type water n sprinkling system will be used in this area. A water sprinkling system is allowable in spite of the Class 2 Water Reactive rating as long as the storage tank is covered. Since the sulfuric acid does not represent a flammability risk, an Ordinary Hazard Group 2 system will be used similar to the remainder of the facility. LJ Dust Suppression Oil. A non-volatile dust suppression oil will be added to the granular r product during the transfer from the silos to the trucks. The storage tank will be located L outside in the space between two storage silos. The dust suppression oil will control dust emissions both during the off-loading process and during transportation and subsequent usage. The dust suppression oil will be Dustrol 3010 by Arr-Maz or an equal product. The Material Safety Data Sheet for Dustrol 3010 was used in conjunction with the Hazardous Material Classification Guide (1993) to identify the material as a Class IIIB Combustible Liquid. The volume stored will be 5,800 gallons, which is below the amount exempt from an H-3 high hazard rating even for areas not protected by sprinklers. n Secondary containment will be provided through a "built-in" containment tub. `—' Health Hazard. Materials with a health hazard of 3 or 4 must meet additional requirements for piping. Sodium hydroxide, sodium hypochlorite and sulfuric acid have health-hazard ratings of 3, which will require piping to meet these additional requirements. The dust suppression oil has a health-hazard rating of 1 and will not be required to meet these requirements. These requirements are as follows: • Piping and tubing carrying toxic materials must be provided with double wall n containment. This will require that sulfuric acid tubing be run in a PVC containment u pipe. • Piping and tubing for sodium hydroxide, sodium hypochlorite, and sulfuric acid will n meet the provisions required for hazardous production material (HPM) facilities in the Mass. SBC. The requirements for HPM facilities include limits for the amount of chemical that can be stored without incurring a high-hazard use group. For the r proposed Process Area, these limits will be met since there is no chemical storage (the quantity in the piping is not included in the permitted quantities). Other provisions required as an HPM facility include the following: �? • An automatic sprinkler system is required. • The maximum exit access travel shall be 100 feet. • A 1-hour fire separation is required with other areas like the Administration Area. • The minimum ventilation rate is the greater of 4 cfm per sq.ft. or 6 AC/hr. u n 6960C n r Memo to File 11/21/01 Page 11 u • Manually or remotely activated automatic fail-safe emergency shutoff valves must be provided at the point or use and the storage tanks. This requirement U will be met by manual shutoff valves at the storage tank and manual pump controls at the point of use. The design of the Process Area meets all of these provisions. The exit access travel distance is well within the 100-foot limit from any of the chemical use points. Since the n facility only marginally meets the definition of an BPM facility, this is considered L� adequate compliance. n u' n E._r U n L n Li F n s n L r L E 6960C Memo to File 11/21/01 Page 12 REFERENCES Building Officials and Code Administrators International, Inc. The BOCA National Fire Protection Code/1999, Eleventh Edition,1999. C Fluer, L. Hazardous Materials Classification Guide, International Fire Code Institute, Whittier, CA, 1993. Hazards Research Corporation (HRC). "Fire and Explosion Hazard Assessment of a Sludge Pelletizing Process," September 1992. L; Hazards Research Corporation (HRC). "Dust Explosion Characteristics and Volume Resistivity of Dried Sewage Sludge," September 1992. Massachusetts State Board of Building Regulations and Standards. "Massachusetts State Building Code, Sixth Edition," 1997. National Fire Protection Association (NFPA). "NFPA 820: Standard for Fire Protection in Wastewater Treatment and Collection Facilities," 1995 Edition. National Fire Protection Association (NFPA). "NFPA 69: Standard on Explosion Prevention Systems," 1997 Edition. nNational Fire Protection Association (NFPA). "NFPA 497: Recommended Practice for U the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas," n 1997 Edition. �-' National Fire Protection Association (NFPA). "NFPA 499: Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations E, for Electrical Installations in Chemical Process Areas," 1997 Edition. National Fire Protection Association (NFPA). "NFPA 654: Standard for the A Prevention of Fire and Dust Explosions from the Manufacturing, Processing and Handling of Combustible Particulate Solids," 1997 Edition. National Fire Protection Association (NFPA). "NFPA 68: Guide for Venting of n Deflagrations," 1998 Edition. v r Lj r r L 6960C r t C-7-1 C_-7J C`7 C-7 C-D C-71 Cy7 C73 C _7 L J C -7 Table 1. Drying Process - Fire and Deflagration Risk and Control Approach Process Step Potential Risks Control Approach Comments 1. Biosolids Cake Conveyor, Minor potential release of Ventilate at 6 air changes per NFPA 497 defines 6 AC/hr as Storage Bins, and Feed methane. hour. adequate ventilation for minor Conveyors. sources. 2. Mixing of wet biosolids Deflagration from ignition of 1. Deactivate pug mill if Pug mill is a mixer, and not a with recycled fine, dried recycled, dried biosolids due weigh scale on wet grinding "mill" and therefore biosolids in pug mill. to frictional heating in pug biosolids feed conveyor is not a source of enough mill. does not indicate delivery frictional heating to be of material. considered a significant risk. 2. Isolate pug mill from dryer inlet using screw conveyor. 3. Delivery of the biosolids 1. Potential for fire or 1. Deactivate dryer if weigh mixture to the inlet of the deflagration due to embers scale on wet biosolids feed dryer. from burner, primarily if conveyor does not indicate handling only the recycled, delivery of material. dried biosolids, but also 2. Provide improved inlet from material build-up at chute that is less throat. susceptible to solids build- up. 3. Provide inert environment through recirculating air system. 4. Dryer quench activated at high temperature in separator process air exhaust. 6960C E C� C�7 CR 1-7 C C C�7 C-=-� C� C�-:I C C,--j 1 -3 1 T77 Table 1. Drying Process - Fire and Deflagration Risk and Control Approach Process Step Potential Risks Control Approach Comments 2. Potential for combustion 1. Provide inert environment due to exposure of through recirculating air biosolids to high system. Flow of temperature furnace recirculated air is verified exhaust. by main fan draft switch. 2. Provide 90° bend to ensure that furnace exhaust is mixed with recirculated process air to maintain maximum temperature of 700°F to 1,000°F at dryer throat. 3. Furnace shuts down at high temperature of process air exiting separator—200°F. Dryer quench activated at 250°F in separator process air exhaust. 4. Dryer. Potential for fire due to fine 1. Provide inert environment dust in unscreened product. through recirculating air system. 2. Dryer quench activated at high temperature (250°F) in separator process air exhaust. 6960C C-7 1-3 F-7) f-"73 1_71 C-7 C U-7 C l7 C-3 _j C� C C-73 Table 1. Drying Process - Fire and Dellagration Risk and Control Approach Process Step Potential Risks Control Approach Comments 5. Cyclone separator for Potential for deflagration due 1. Provide inert environment separation of dried to dust concentration/ through recirculating air biosolids from air stream. collection. system. 2. Dryer quench activated at high temperature (250°F) in separator process air exhaust. 3. Provide relief vent on separator. 6. Main air fan draws air Potential for combustion or 1. Concentration of dust is Tray scrubber provides stream through dryer and deflagration due to fine dust insufficient to support a quench and particulate separator and discharges carry over from cyclone deflagration removal. to tray scrubber. separator from fan or in 2. Provide inert environment ductwork from separator to through recirculating air fan and from fan to tray system. scrubber. 3. Provide tight (pipe-grade) ductwork and fittings to eliminate leakage that could lead to dust emissions into the building. 7. Vibrating screen for Potential for deflagration due Screener operates under slight Explosion proofing not sorting dried biosolids to fine dust in unscreened vacuum to limit dust buildup required under NFPA 654. into four streams: product. within equipment. granular product, fines, oversized, and trash. 6960C 1-71 C--I 1"3 1--1 C__D C73 1 ~3 C _] C —D [---:] C__�] 17-3 1-3 3 C-7) C C77 1_7 C� Table 1. Drying Process - Fire and Deflagration Risk and Control Approach Process Step Potential Risks Control Approach Comments 8. Crusher for oversized Potential for combustion or 1. Metals are removed by material from screen. deflagration of material. trash rack on screener. 2. Crusher operates under slight vacuum to limit dust build-up within equipment. 3. Provide relief vent in recycle bin. 9. Recycle bin for storage of Potential for combustion or 1. Provide nitrogen to fines and crushed deflagration of product. maintain inert oversized material. Also, Potential for self heating. environment when idle. receives discharges from 2. Monitor temperature silo receiving box, blow throughout bin and alarm tank vent of pneumatic at high temperature conveying system, and condition. dust from dust collector 3. Provide relief venting in mounted on bin cover. rec cle bin. 10. Pellet cooler. Slows the Potential for combustion or 1. Screened product is not rate of oxidation and deflagration of product. considered at risk for dust- heating in the silos. deflagrations . 2. Cool product to limit rate of chemical oxidation that can lead to combustion or deflagration temperatures in storage. 6960C C �7 171 C -71 C-77 C---D C 7 C-----j C---3 1-71 E--7 1-71 C--3 Table 1. Drying Process - Fire and Deflagration Risk and Control Approach Process Step Potential Risks Control Approach Comments 11. Pneumatic Conveying. 1. Potential for combustion or 1. Screened product is not deflagration of product considered a significant during pneumatic risk for deflagration. conveying. 2. Target box vent will prevent oxygen introduction into silo. 3. Pneumatic transport vent and target box vent will be directed to recycle bin to collect dust. 2. Potential for wear of 1. Regular inspection of conveying piping creating piping. release of product into 2. Heavy duty piping and Process Area. Potential for elbows (Sch 80 for combustion. transport) 3. Screened product is not considered a risk for dust related defla rations . 12. Storage Silos. Potential for combustion or 1. Screened product is not deflagration of product. considered at risk for dust- related deflagrations 2. Product has been cooled to limit rate of self- heating. 3. Provide nitrogen to maintain inert environment and limit self-heating. 69600 CT7 1T71 C'73 C--D E-71 _-D C _7 C--D C-D C-:1 C :1 Table 1. Drying Process - Fire and Deflagration Risk and Control Approach Process Step Potential Risks Control Approach Comments 4. Monitor temperature throughout silo and alarm at high temperature. 5. Top seam of silo is designed to vent during a deflagration. 13. Product Off-Loading. Potential for combustion or 1. Screened product is not Loading occurs in the open, deflagration of product. considered at risk for without a confined vessel. deflagration. 2. Add dust suppression oil that further reduces dust emissions from product. 14. Transportation and Potential for combustion or 1. Screened product is not This is an off-site risk. Subsequent Usage. deflagration of product. considered at risk for dust- related deflagrations . 2. Dust suppression oil further reduces dust emissions from product 3. Weather protection to prevent microbial self- heating due to material becoming wet in transport. 4. Transport product in 40 cubic yard or less vessels to avoid excessive self- heating from chemical oxidation 6960C C� C -� C C � 1-- �] C-� C ] C C 3 C CT C ] C C Table 2. Summary of Chemical Hazard Ratings and Building Use Code Requirements Maxinlllm Mss. Code Mass. Code— Maximum Volume Hazard Exempt Building Use Chemical Strength, % Stored, gal Classifications Amount, gala Classification Comments Sodium Hydroxide 50 600 Corrosive 500 F-1 Sodium Hypochlorite 15 400 Corrosive 500 F-1 Sulfuric Acid 93 4,000 Corrosive 50 lb Outside Water reactive Water Reactive 2 Storage classification controls Toxic rating. Dustrol 3010 N/A 5,800 Combustible Liquid 13,200 F-1 Storage below exempt - Class IIIB amount. Notes: a. Quantities shown can be doubled because building will be equipped with an automatic sprinkler system. b. Sodium hydroxide and sodium hypochlorite will be stored together in Chemical Storage/Feed Room, which will be equipped with automatic sprinkler. The total quantity of corrosive will not exceed the exempt amount of 1000 gallons. Consequently, the room can be rated F-1 rather than H-4. 6960C