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Home My WebLink AboutStormwater Report - 1003 OSGOOD STREET 2/18/2011 OPERATION & MAINTENANCE PLAN And LONG TERM POLLUTION PREVENTIONPLAN For S TORM WA TER MA NA GEMENT S YS TEMS Map 35,Lot 50 1003 Osgood Street North Andover, MA 01845 Prepared For: Osgood Properties LLC 865 Turnpike Street, 2nd Floor North Andover, MA 01845 June 17, 2010 Revised: September 22, 2010 Revised: December 8, 2010 Revised: January 17, 2011 Revised: February 18, 2011 low= WNEW MHF Design Consultants, Inc. ENGINEERS • PLANNERS - SURVEYORS 44 Stiles Road - Suite One - Salem, NH 03079 TEL (603) 893-0720 - FAX (603) 893-0733 www.mhfdesign.com MIFF Project #230207 OPERATION & MAINTENANCE PLAN AND LONG TERM POLLUTION PREVENTION PLAN The Stormwater Policy developed by the Massachusetts Department of Environmental Protection and Office of Coastal Zone Management requires that an operation and maintenance plan be submitted for review and approval. The plan shall include the parties responsible for operation and maintenance, schedule for inspections and maintenance, routine and non-routine maintenance tasks and provisions for appropriate access and maintenance easements surrounding controls and extending to the public right-of-way. The owner of record shall be responsible for the installation, operation, and maintenance of all stormwater management systems after construction. Logs of inspections and cleanings shall be maintained by the owner of record and annual inspection forms shall be filed with the Town of North Andover Conservation Commission. Submittals to the Conservation Commission shall be made, for at least one (1) year after the issuance of the occupancy permit, or until deemed necessary by the Town. Due to the close proximity of the development to the Town of North Andover's public water supply, Lake Cochichewick, strict adherence shall be complied with for all maintenance and source controls. Documentation: A maintenance log shall be kept summarizing inspections, maintenance and any corrective actions taken. The log shall include the date on which each inspection or maintenance task was performed, a description of the inspection findings or maintenance completed, and the name of the inspector or maintenance personnel performing the task. If a maintenance task requires the clean out of any sediments or debris, the location where the sediment and debris was disposed after removal will be indicated. Disposal of the accumulated sediment and hydrocarbons must be in accordance with applicable local, state, and federal guidelines and regulations. The logs shall be made accessible to department staff and a copy provided to the department upon request. Inspection and Maintenance Frequency and Corrective Measures: The following areas, facilities and measures will be inspected and the identified deficiencies will be corrected. Clean out must include the removal and legal disposal of any accumulated sediments and debris and disposed of in accordance with applicable local, state, and federal guidelines and regulations. 1. Street Sweeping: Sweeping should be conducted a minimum of once per month (primarily during spring and fall). Sweeping shall be done once in the early fall and then immediately following spring snowmelt to remove sand and other debris. Pavement surfaces shall be swept at other times such as in the fall after leaves have dropped to remove accumulated debris. Since contaminants typically accumulate within 12 inches of the curbline, street cleaning operations should concentrate in cleaning curb and gutter lines for maximum pollutant removal efficiency. Other areas shall also be swept periodically when visual buildup of debris is apparent. Once removed from paved surfaces, the sweeping must be handled and disposed of properly. In accordance with MassDEP's Bureau of Waste Prevention, the reuse and disposal of sweepings can be used in three ways: In one of the ways already approved F:\Projects\Eng\230207\Drainage\2-18-11\230207 O&M Report--Rev4.Doc 2 by MassDEP (e.g. daily cover in a landfill, additive to compost, fill in a public way); if approved under a Beneficial Use Determination; disposed in a landfill. 2. Deep Sump Hooded Catch Basin: Inspect catch basins at least 4 times per year and at the end of the foliage and snow removal seasons (preferably in spring and fall) to ensure that the catch basins are working in their intended fashion and that they are free of debris. Sediment must also be removed 4 times per year of whenever the depth of deposits is greater than or equal to one half the depth form the bottom of the invert of the lowest pipe in the basin. Catch basins should be cleaned a minimum of once per year. If the basin outlet is designed with a hood to trap floatable materials check to ensure watertight seal is working. At a minimum, remove floating debris and hydrocarbons at the time of the inspection. Sediment and debris can be removed by a clamshell bucket; however a vacuum truck is preferred. Disposal of the accumulated sediment and hydrocarbons must be in accordance with applicable local, state, and federal guidelines and regulations. 3. Vegetated Areas: Inspect slopes and embankments early in the growing season to identify active or potential erosion problems. Replant bare areas or areas with sparse growth. Where rill erosion is evident, armor the area with an appropriate lining or divert the erosive flows to on-site areas able to withstand the concentrated flows. During the summer months, all landscape features are to be maintained with the minimum possible amount of fertilizers, pesticides or herbicides. Any fertilizers, pesticides or herbicides used shall be Organic or All Natural and approved by the Conservation Department,prior to use. If in question, maintenance personnel should check with the Conservation Commission. All personnel involved with the maintenance of landscaping will be informed of this condition. Special attention shall be taken when mowing the back of the lot in the open field area, specifically the 100 foot buffer zone and wetland resource areas. To the extent ground-nesting birds are present, mowing should be avoided before August 1 in any given year. If mowing is essential prior to August 1, avoid areas where birds are frequently seen. Limit mowing to every one to three years. Source: http•//www massaudubon.or /g Birds and Birding/grassland/small.php#mowing. 4. Subsurface Detention & Infiltration Systems: A system should initially be inspected within the first three months after completion of the site's construction and at a minimum of four times, every 3 months, for the first year of operation. Preventive maintenance should be performed at least every six months and sediment shall be removed from pretreatment BMP's after every major storm event. The Infiltration System shall be inspected on regular semi-annual scheduled dates. Ponded water in the system indicates potential infiltration failure in the bottom of the pipe and/or stone. In this case, accumulated sediment shall be removed from the bottom utilizing water jets and/or truck mounted vacuum equipment. Sediment and debris removal should be through the use of truck mounted vacuum equipment. Outlet pipes should be flushed to point of discharge on the same frequency as mentioned above. Disposal of the accumulated sediment and hydrocarbons must be in accordance with applicable local, state, and federal guidelines and regulations. The following is the recommended procedure to inspect the underground system in service: F:\Projects\Eng\230207\Drainage\2-18-11\230207 O&M Report--Rev4.Doc 3 I. Locate the riser or cleanout section of the system. The riser/cleanout will typically be 6 or 12" in diameter or larger. 2. Remove the lid from the riser/cleanout. 3. Measure the sediment buildup at each riser and cleanout location. Only certified confined space entry personnel having appropriate equipment should be permitted to enter the system. 4. Inspect each manifold, all laterals, and outlet pipes for sediment build up, obstructions, or other problems. Obstructions should be removed at this time. 5. If measured sediment build up is between 2" to 8", clearing should be considered; if sediment build up exceeds 8", cleaning should be performed at the earliest opportunity. A thorough cleaning of the system (manifolds and laterals) shall be performed by water jets and/or truck mounted vacuum equipment. 6. Visually and manually inspect the Emergency Shear Gate Valve during each inspection of the underground infiltration system. Verify the device functions properly and fix or replace, the device as needed. Pretreatment BMP's shall be inspected and cleaned during the regular bi-annual inspections. Clearing Inlets and Outlets: The inlet and outlet of the Infiltration System should be checked periodically to ensure that flow structures are not blocked by debris. All pipes connecting the structures to the system should be checked for debris that may obstruct flow. Inspections should be conducted monthly during wet weather conditions from March to November. It is important to design flow structures that can be easily inspected for debris blockage. 5. Snow Storage and Removal: Proposed snow storage areas are as shown, on the Site Plans prepared for Osgood Properties LLC, and any excess snow is to be trucked offsite. During the winter months all snow is to be stored such that snowmelt is controlled. In the event the amount of snow exceeds such capacity, it is to be removed off-site. Only plowing, snow removal and application of clean, untreated road sand shall be used for winter maintenance. The use of any anti-icing chemicals is prohibited. No toxic or hazardous chemicals are to be used for ice or snow control. Avoid disposing of snow on top of storm drain catch basins or in stormwater drainage swales or ditches. For questions and additional information regarding snow storage or disposal,please contact the Mass DEP's Northeast Regional Office in Wilmington at 978-694-3200. 6. Stormceptors: Initial maintenance to be performed twice a year for the first year after the unit is online and operational. Stormceptors should be cleaned a minimum of once per year. Refer to the attached Stormceptor Owner's manual for operation and maintenance procedures and schedules thereafter. 7. Bio-retention Area: The system should initially be inspected within the first three months after completion of the site's construction and after any rainfall occurs. During the first year of operation bio-retention areas should be inspected after at least two-three large storm events (>1") to ensure they drain fully within 72-hours. F:\Projects\Eng\230207\Drainage\2-18-11\230207 O&M Report--Rev4.Doc 4 Preventative maintenance will aid in proper function of the Bio-retention Area. Inspect for trash and debris on a month to month basis year round. Additional mulch should be laid down on an annual basis, preferably in the springtime. Prune any plantings and remove dead vegetation on an annual basis in the spring or fall and any dead vegetation should be replanted in the springtime. In the event the Bio-retention Area needs to be replaced due to failure or other reasons, any vegetation & filter media should be replaced in either the late spring or early summer. Snow storage should not occur in the Bio-retention Area. Refer to the Snow Storage and Removal section, above, for appropriate action regarding snow storage. Long Term Pollution Prevention Plan: In accordance with DEP Stormwater Standard #4 the development and implementation of suitable practices for source control and pollution prevention shall be incorporated in a Long Term Pollution Prevention Plan (LTPPP). The primary focus of the LTPPP is to establish procedures and controls for limiting the potential sources of pollutants, including nutrients that may contribute to excessive contaminant levels in the site's stormwater runoff. To this end the following source controls and procedures will be in place at the site: • Good House Keeping — It shall be the responsibility of the property owner to keep the site clean at all times. Refuse disposal and pickup shall occur on a regular basis and all material shall be disposed of in the specified dumpster location area on the Site Development Plans. • Storing Material and waste products inside or under cover — No material storage is to take place outside the proposed facility on either paved or lawn areas. All material stored on site will conform with all storage requirements of local, state and federal agencies. • Routine inspections and maintenance of stormwater BMP's —Refer to the Operation and Maintenance procedures for each BMP as described in the O&M Plan as described herein. • Maintenance of lawns, gardens and other landscaped areas — All landscaping and maintenance to be performed by an authorized company chosen by the property owner. • Storage and use of fertilizers, herbicides and pesticides —All landscape maintenance will be conducted by an authorized company chosen by the property owner. Any application of herbicides or pesticides will be applied by a licensed applicator. Additional information can be found in the O&M Plan as described herein. • Pet waste management — Pet waste shall be disposed of in waste receptacles provided within each unit. • Proper management of deicing chemicals and snow — Deicing chemicals and snow removal shall primarily be the responsibility of the property owner additional information can be found in the O&M Plan as described herein. • Spill prevention and response — Refer to the attached Emergency Response and Maintenance Procedures attached hereto. As part of this plan there are contact names and numbers and procedures for what to do in the event a spill occurs. F:\Projects\Eng\230207\Drainage\2-18-11\230207 O&M Report--Rev4.Doc 5 EMERGENCY RESPONSE & MAIN"T'ENANCE PROCEDURES Contact Agent: Phone #: Mailing Address: All Emergency calls are to be directed to DETERMINATION FOR RESPONSE OF RELEASE OF PRODUCT OR HAZARDOUS MATERIAL: 1. Emergency calls would be ANY RELEASE of product or hazardous material that is ONE GALLON OR MORE. 2. Determination of quantity of spill should determine methods used to fix problem(i.e. the use of a spill kit or shear gate closing the outlet). SPILL PROCEDURES: Contact agent will handle the spill procedures as follows: 1. Call comes into Contact designated by Osgood Properties, LLC or the condominium association. 2. Contact agent is required to ask the following questions of the caller (depending on the spill type) a. Facility name and address? b. Caller name and call back name and number? c. The extent and seriousness of the spill? d. Any reported injuries? e. Any immediate heath or environmental dangers? £ Approximately how much contaminant has been released? g. Is the release still in progress? h. Have the following Emergency Services been called: i. N. Andover Fire Department ii. N. Andover Police Department iii. N. Andover Division of Public Works iv. Clean Harbors v. EPA vi. Ambulance (as needed basis) vii. Towing (as needed basis) i. Have the following Town Departments been called: i. N. Andover Conservation Department ii. N. Andover Health Department iii. N. Andover Planning Department j. What was the release to soil,water, or air? k. What are the weather conditions? 1. What spill procedures have been deployed, if any? i. Close shear gate in manhole downstream of spill or apply spill kit procedures. ii. Shear gate and/or spill kit should be readily available placed inside structure or in a visible nearby location. iii. The location of all spill kits and shear gate should be clearly identified on a plans (similar to fire extinguishers or exits)located within each building. m. What are the names and titles of response officials on the scene? 3. Contact agent contacts Osgood Properties,LLC and informs them of the incident 4. Spill is contained by means necessary and system is vacuum pumped free of sediment and debris or contaminant. 5. Inspect Stormceptors and Snouts for debris or sediment buildup and follow operation and maintenance in accordance with O&M procedures. INSPECTIONS: 1. Regular inspections to be performed in accordance with specifications as outlined in the O&M Plan for the stormwater management system. 2. Follow-up inspections, after a spill has occurred, are to be performed once a month for a 6-month time period with reports submitted to the Town. The report/letter should state the conditions of the stormwater system and specify whether it is functioning as designed. 3. Inspections to be performed by an authorized agent as determined by Osgood Properties LLC. 4. If no evidence or contaminants from the spill is found after the follow-up time period has commenced,regular inspections are to take place in accordance with the O&M plan. CONTACT INFORMATION: Contact Agent: Phone#: Mailing Address: _ _ .01-5,1 r.b .fi 0-0 11 John Grasso Osgood Properties,LLC 978-502-6030 865 Turnpike Street,N.Andover,MA Andrew Melnikas,Fire Chief N.Andover Fire Dept. 978-683-3169 124 Main Street,N.Andover,MA Richard Stanley,Police Chief N.Andover Police Dept. 978-688-9590 566 Main Street,N.Andover, MA Gene Willis N.Andover DPW 978-685-0950 384 Osgood Street,N.Andover,MA Susan Sawyer N.Andover Health Dept. 978-688-9540 1600 Osgood Street,N.Andover,MA Judy Tymon N.Andover Planning Dept. 978-688-9535 1600 Osgood Street,N.Andover,MA Jennifer Hughes N.Andover Conservation Dept. 978-688-9530 1600 Osgood Street,N.Andover,MA Timothy Willett N.Andover Sewer&Water Dept. 978-685-0950 384 Osgood Street,N.Andover,MA 230207 Stormwater Operation and Maintenance Log Sir �>>,�;� h� �},, , � ` ;�>, T � � �Gene>ra�;�n�oru%a�t�onrf:f�' •.:° j' ':' `'�r� ?; Project Name NPDES Tracking No. Location (If Applicable) Date of Inspection Start/End Time Inspector's Name(s) Inspector's Title(s) Inspector's Contact Information Describe present phase of construction Type of Inspection ❑Regular ❑Post-storm event Current Conditions: Do you suspect that discharges may have occurred since the last inspection? ❑Yes ❑No Are there any discharges at the time of inspection? ❑Yes ❑No Site-specific BMPs ` -. ',�:6c�a¢. '�.as,�, ,r s s�`•S-sS,a i a;v fe `� _, .-x 3F,,+ ;{ - &:,i -n ,q, -- y.t.�au/Y, "� _-�` v talIdUT� ,Gon eofi�y >Ac�ion, ,�e�etletk ��Parvy eo oLeU.; � t ��yy� f.[ ,y�',j r §all V-G 3xt2 �'FL ri34b +T+�'tuo4io �q onAe� 1 t u $LSr� tloIl3..}.Tt k$.• -Cr}$.Yf M fro A Overall Site Construction ❑Yes ❑No Activities B Silt Fence ❑Yes ❑No C Construction entrance ❑Yes ❑No D Stockpiles ❑Yes ❑No E Silt bags—on-site ❑Yes ❑No F Temporary Dewatering Basins ❑Yes ❑No F:\Projects\Eng\230207\Drainage\1-17-11\230207 Inspection Log Template-Rev2.doc Pagel of 5 - +% �<��B1es- n iolnti t . �� :zero 1,�► �} 4.,.; } , 1 Street Sweeping ❑Yes ❑No • Evidence of oil grease ❑Yes ❑No 2 Deep Sump Hooded Catch Basin ❑Yes ❑No • Grates clear of debris ❑Yes ❑No • Inlet and outlet clear of debris ❑Yes ❑No • Evidence of oil grease ❑Yes ❑No • Observance of accumulated ❑yes ❑No sediment • Evidence of structural deterioration El Yes ❑No • Evidence of spalling or ❑yes ❑No cracking of structural parts • Evidence of flow bypassing ❑yes ❑No facility 3 Stormceptors ❑Yes ❑No • Grates clear of debris ❑Yes ❑No • Inlet and outlet clear of debris ❑Yes ❑No • Observance of accumulated ❑Yes [:1 No sediment • Evidence of oil grease ❑Yes ❑No • Evidence of flow bypassing ❑yes ❑No facility 4 Stone Lined Outlet Protection ❑yes ❑No Areas • Inlet/Inflow pipes clear of debris ❑Yes El No • Overflow spillway clear of ❑Yes debris [:1 No • Outlet clear of debris ❑Yes ❑No • Evidence subsidence ❑Yes ❑No • Tree growth ❑Yes ❑No • Other(specify) ❑Yes ❑No 5 Ditches,swales&channels& ❑yes ❑No Bio-retention Area • Inlet/Outlet clear of debris ❑Yes ❑No • Bottom surface clear of debris ❑Yes ❑No • Evidence of rilling or gullying ❑Yes ❑No • Observance of accumulated ❑yes F-1 No sediment • Bottom dewaters between storms El Yes F-1 No • Vegetation healthy and growing ❑Yes ❑No • Standing water or wet spots ❑Yes ❑No • Tree growth ❑Yes ❑No • Other(specify) ❑Yes ❑No F:\Projects\Eng\230207\Drainage\1-17-11\230207 Inspection Log Template-Rev2.doc Page 2 of 5 �'+�� f�� tira+r€ �G.{r�rC1� � ,,yr rr 3 �*A l��r T` 'ice 5 �ry�j ��x � s 1 `1i��r�xa} . �3f•?}1�� q� C �`ri```�it� �11S >h Q � 5.a�iw ;�F'ati G�e�� eQtbY��1Q�1Q1►��e(1flC1 f.�� 5�3fi"`` s c�r� 6 Subsurface Infiltration& D Yes ❑No Detention Systems • Pipe bottom clear of debris ❑Yes ❑No • Inlet/Inflow pipes clear of D Yes ❑No debris • Overflow spillway clear of Yes ❑No debris • Outlet clear of debris ❑Yes ❑No • Observance of accumulated El Yes ❑No sediment • Other(specify) ❑Yes ❑No i 14�' 0.1- . i 5 � F:\Projects\Eng\230207\Drainage\I-17-11\230207 Inspection Log Template-Rev2.doc Page 3 of 5 Overall Site Issues k ,t �{�y�sh y� 1�1I111ie1� d � » (�1t�0(� Y��I1IZPrb1j��1ACt1011" 'ga i � � �Q 3 ta4 .j 1 Are all slopes and disturbed ❑Yes [:]No ❑ Yes ❑No areas not actively being worked properly stabilized? 2 Are natural resource areas ❑Yes ❑No ❑Yes ❑No (e.g.,streams,wetlands, mature trees,etc.)protected with barriers or similar BMPs? 3 Are perimeter controls and ❑Yes [:]No ❑Yes ❑No sediment barriers adequately installed(keyed into substrate)and maintained? 4 Are discharge points and ❑Yes [:]No ❑Yes ❑No receiving waters free of sediment deposits? 5 Are storm drain inlets ❑Yes [:]No ❑Yes ❑No properly protected? 6 Is there evidence of ❑yes ❑No ❑Yes ❑No sediment being tracked into the street? 7 Is trash/litter from work ❑Yes ❑No ❑Yes ❑No areas collected and placed in covered dumpsters7 8 Are washout facilities(e.g., ❑yes ❑No ❑Yes ❑No paint,stucco, concrete) available,clearly marked, and maintained? 9 Are vehicle and equipment ❑Yes ❑No ❑Yes ❑No fueling,cleaning,and maintenance areas free of spills,leaks,or any other deleterious material? 10 Are materials that are ❑Yes ❑No [-]Yes ❑No potential stormwater contaminants stored inside or under cover? 11 Are non-stormwater ❑Yes ❑No ❑Yes ❑No discharges(e.g.,wash water, dewatering)properly controlled? F:\Projects\Eng\230207\Drainage\I-17-11\230207 Inspection Log Template-Rev2.doc Page 4 of 5 Certification statement: "I certify that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information,the information submitted is,to the best of my knowledge and belief,true,accurate, and complete. Print name: Signature: Date: Copies to: ❑ Owner: ❑ Contractor: ❑ Conservation Commission: ❑ MHF Project Manager: ❑ Other: F:\Projects\Eng\230207\Drainage\1-17-11\230207 Inspection Log Template-Rev2.doc Page 5 of 5 Stormcepbr Owner' s Manual April 2000 The Stormceptor®System is protected by one or more of the following patents: Canadian Patent No.2,009,208 Canadian Patent No. 2,137,942 Canadian Patent No. 2,175,277 Canadian Patent No. 2,180,305 Canadian Patent No. 2,206,33 8 U.S. Patent No. 4,985,148 U.S. Patent No. 5,498,331 U.S. Patent No. 5,725,760 U.S. Patent No. 5,753,115 U.S. Patent No. 5,849,181 U.S. Patent No. 6,068,765 Australia 693.164 Australia 707,133 New Zealand 314,646 European Paten Treaty 95 307 996.9 The Stormceptor System for Stormwat r Quality Improvement Congratulations! Your selection of a Stormceptore System means that you have chosen the most recognized and efficient stormwater oil/sediment separator available. Stormceptor is a pollution control device that protects our lakes, rivers and streams from the harmful effects of non-point source pollution. Please address any questions or concerns regarding the Stormceptor Systems to Stormceptor Canada Inc at 1-800-565-4801 or visit our website at www.stormceptor.com. What is a Stormceptor? Stormceptor is a patented water quality structure that takes the place of a conventional manhole with in a storm drain system. Stormceptor removes free oil (TPH) and suspended solids (TSS) from stormwater preventing spills and non-point source pollution from entering downstream lakes and rivers. Key benefits of a Stormceptor include: • Capable of removing 50%to 80%of the total sediment load when properly applied as a source control for small areas • Removes free oil from stormwater during low flow conditions • Will not scour or re-suspend trapped pollutants • Excellent spill control device for commercial and industrial developments • Easy to maintain (vacuum truck) • STORMCEPTOR clearly marked on the cover(excluding inlet designs) • Engineered and continually tested • Vertical orientation therefore resulting in a smaller footprint Please Maintain Your Stormceptor To ensure long-term environmental protection through continual performance, Stormceptor must be maintained. The need for maintenance is determined through inspection of the Stormceptor. Procedures for inspection are provided in this document. Maintenance of the Stormceptor is performed from the surface via vacuum truck. . If you require a list of contacts for cleaning your Stormceptor please call one of our Stormceptor offices or your nearest Stormceptor affiliate(affiliates listed in Appendix 1). Stormceptor How does Stormceptor®Work? Stormceptor can be divided into two components: • Lower treatment chamber • Upper by-pass chamber Stormwater flows into the by-pass chamber via the storm drain pipe. Low flows are diverted into the treatment chamber by a weir and drop pipe arrangement. The treatment chamber is always full of water. Water flows up through the outlet pipe based on the head at the inlet weir, and is discharged back into the by-pass chamber downstream of the weir. The downstream section of the by-pass chamber is connected to the outlet storm drainpipe. Free oils and other liquids lighter than water will rise in the treatment chamber and become entrapped beneath the fiberglass insert since the outlet pipe is submerged. Sediment will settle to the bottom of the chamber by gravity. The circular design of the treatment chamber is critical to prevent turbulent eddy currents and to promote settling. During high flow conditions, stormwater in the by-pass chamber will flow overtop of the weir and be conveyed to the outlet storm drain directly. Water that overflows the weir creates a backwater effect on the outlet pipe (head stabilization between the inlet drop pipe and outlet riser pipe) ensuring that excessive flow will not be forced into the treatment chamber, which could scour or re-suspend the settled material. The by-pass is an integral part of Stormceptor since other oil/grit separators have been noted to scour during high flow conditions(Schueler and Shepp, 1993). Stormceptor Models and Identification Stormceptor is available in both concrete and fiberglass. There are currently nine different sizes available. A concrete Stormceptor is denoted by STC (e.g. STC6000) preceding the model number. A fiberglass Stormceptor is denoted by STA(e.g. STA6000)preceding the model number. In the concrete Stormceptor, a fiberglass insert separates the treatment chamber from the by-pass chamber. There is three insert designs: the"spool", the"disc"and the "inlet". The different insert designs are illustrated in Figures 1, 2 and 3. These designs are easily distinguishable from the surface once the cover has been removed. In the"spool" design you will see one large 914 mm (36") opening in the center of the insert with two 200 mm (8") inspection ports located either vertically on the sides of the 914 mm (36") opening or horizontally on either side of the opening. There are three versions of the in-line disc insert: "single inlet/outlet", "multiple inlet" and "submerged". In the "disc" design you will be able to see the inlet pipe, the drop pipe opening to the lower chamber,the weir, a 150 mm (6") oil inspection/cleanout pipe, a large 610 mm (24") riser pipe-opening offset on the outlet side of the structure, and the outlet pipe from the unit.The weir will be around the 610 nun (249') outlet pipe on the "multiple inlet"disc insert.The "submerged" disc insert has a higher weir and,a second inlet drop pipe. In the "inlet" design you will be Stormceptor able to see the 305 mm (12") inlet drop pipe and 100 mm (4") outlet riser pipe as well as a central 1 00m [4"] oil inspection/cleanout port. Maintenance from the surface by vacuum truck. Vacuum hose lowered through central opening in insert Spool Insert Concrete Stormceptor Figure 1 "Spool" Insert Concrete Stormceptor® Stormceptor Sediment& oil Oil removal can be removal can be performed by vacuum truck performed by vacuum through the oil inspection/ truck through the cleanout pipe large outlet riser pipe Disc Insert Concrete Stormceptor Figure 2 Single Inlet/Outlet "Disc" Insert Concrete Stormceptor® Stormceptor Inlet Grate Oil Port Inlet Insert Removable Tee Maintenance Figure 3 STC 300/450 Inlet Insert Sizes/Models Dimensions of the fiberglass and concrete Stormceptor®units are provided in Table 1.Values of invert to grade are provided later in this document for your site. The total depth for cleaning will be the sum of the depth from invert to grade and invert to the bottom of the unit. Table 1. Stormceptor Dimensions Model Model Pipe Invert to Bottom of Pipe Invert to Bottom of (Metric) (US) STA Stormceptor STC Stormceptor in (in.) in(in.) 300 450 1.6 (64) 1.7 (68) 750 900 1.6 (64) 1.9 (74) 1000 1200 2.1 (81) 2.2 (86) 1500 1800 2.9 (115) 3.1 (122) 2000 2400 2.3 (89) 3.1 (122) 3000 3600 3.2 (127) 4.0 (158) 4000 4800 2.9 (113) 3.7 (146) 5000 6000 3.5 (138) 4.3 (170) 6000 7200 3.3 (128) 4.0 (158) * Depths are approximate The capacities of the different Stormceptor units are provided in Table 2. Stormceptor Table 2. Stormce tor®Capacities Model Model Sediment Oil Total Holding (Metric) (US) Capacity Capacity Capacity L (US gal) L(US gal) L(US gal) 300 450 1275 (335) 325 (85) 1775 (470) 750 900 2460 (565) 915 (280) 4325 (950) 1000 1200 3260 (845) 915 (280) 5125 (1230) 1500 1800 5660 (1445) 915 (280) 7525 (1830) 2000 2400 6150 (1345) 2945 (880) 10925 (2495) 3000 3600 10415 (2600) 2945 (880) 15195 (3750) 4000 4800 14060 (3475) 3490 (1025) 20180 (5020) 5000 6000 18510 (4550) 3490 (1025) 24635 (6095) 6000 7200 23445 (5425) 4150 (1100) 31210 (7415) Identification Even if you do not have plans of your storm drain system you will be able to easily identify where the inline Stormceptor unit(s) (spool or disc insert) are since the name STORMCEPTOR is clearly embossed on the cover.You will be able to determine the location of"inlet" Stormceptor units with horizontal catch basin inlets by looking down the grate since the insert will be visible. The name Stormceptor is not embossed on the inlet models due to the variability of inlet grates used/approved across North America. Once you have found the unit, you may still be uncertain which model number it is. Comparing the measured depth from the water level (bottom of insert) to the bottom of the tank with Table 1 should help determine the size of the unit. Starting in 1996, a metal serial number tag has been affixed to the inside of the unit.The serial number has the model number written on it. If the unit does not have a serial number, or if there is any uncertainty regarding the size of the interceptor using depth measurements, please contact Stormceptor at 1 800 565- 4801 and we will help you determine the size of a particular unit. What is the Maintenance Procedure? Maintenance of Stormceptor is performed using vacuum trucks. No entry into the unit is required for maintenance of the spool insert, inlet insert or the smaller disc inserts. Entry to the level of the disc insert may be required for servicing the larger disc insert models. DO NOT ENTER THE STORMCEPTOR CHAMBER unless you have the proper equipment, have been trained and are qualified to enter a confined space, as identified by local Occupational Safety and Health Regulations (e.g. Canada Occupational Safety and Health Regulations — SOR/86-304). Without the proper equipment and training, entry into confined spaces can result in serious bodily harm and potentially death. Consult local, provincial, and/or state regulations to determine the requirements for confined space entry. Be aware that the insert may be slippery. In addition, be aware that some units do not have a safety grate to cover the outlet riser pipe that leads to the submerged, lower treatment chamber. Stormceptor The Vacuum Service Industry is a well-established sector of the service industry that cleans underground tanks, sewers and catch basins. Costs to clean a Stormceptore will vary based on the size of unit and transportation distances. The depth of oil in the interceptor can be determined by inserting a dipstick tube in the 150 mm (6") oil inspection/cleanout pipe ("disc" design), or in the 914 mm (36")central access way ("spool design), or in the 100 mm (4")cleanout pipe ("inlet" design). Similarly, the depth of sediment can be measured from the surface without entry into the Stormceptor via a dipstick tube equipped with a ball valve (Sludge Judge). This tube would be inserted in the central opening ("spool" design) or in the 610 mm (24") opening ("disc design), or in the 100 mm (4") cleanout pipe ("inlet" design). Maintenance should be performed once the sediment depth exceeds the guideline values provided in Table 3. For the "spool" design Stormceptor maintenance is performed through the large central 914 mm (36") diameter opening for both the oil and the sediment. In the "disc" design, oil is removed through the 150 mm (6") oil inspection/cleanout pipe and sediment is removed through the 610 mm (24") diameter outlet riser pipe. Alternatively, oil could be removed from the 610 mm (24") opening if water is removed from the lower chamber to lower the oil level to the level of the drop pipes. For the"inlet" design, maintenance is performed through the 305mm (12") inlet drop pipe for the sediment, and oil can be removed from the 100 mm (4")oil/inspection cleanout pipe. We recommend the following procedure to clean out the Stormceptor: 1. Check for oil(using a dipstick tube) 2. Remove any oil separately using a small portable pump 3. Decant the water from the unit to the sanitary sewer using a portable pump (prior approval is required from the sewer authority/municipality) 4. Remove the sludge from the bottom of the unit using a vacuum truck 5. Re-fill the Stormceptor with water where required by the local jurisdiction How Often Is Maintenance Required? Generally, annual maintenance is recommended but the required maintenance frequency will vary with the amount of pollution on your site (number of hydrocarbon spills, amount of sediment, etc.). It is recommended that the frequency of maintenance be increased or reduced based on local conditions. If the sediment load is high,maintenance may be required semi-annually.Conversely once the site has stabilized, maintenance may be required less frequently. Maintenance should be performed immediately after an oil spill or once the sediment depth in Stormceptor reaches the value specified in Table 3 based on the unit size. In the "disc" design and "inlet" design, any potential obstructions at the inlet can be observed from the surface. The "disc" insert has been designed as a platform to facilitate maintenance of the Stormceptor and the storm drain system. Stormceptor Table 3. Sediment Depths Indicatin Required Maintenance Model Model Sediment Depth (Metric) (US) mm (in.) 300 450 200 (8) 750 900 200 (8) 1000 1200 250(10) 1500 1800 375 (15) 2000 2400 300 (12) 3000 3600 425 (17) 4000 4800 375 (15) 5000 6000 450(18) 6000 7200 375 (15) What Should I do in the Event of an Oil Spill? Stormceptor® is often implemented in areas where the potential for spills is great. Stormceptor should be cleaned immediately after a spill occurs by a licensed liquid waste hauler. You should also notify the appropriate regulatory agencies as required in the event of a spill. Disposal of the Trapped Material Removed from Stormceptor The requirements for the disposal of material from Stormceptor are similar to that of any other Best Management Practices (BMP). Local guidelines should be consulted prior to disposal of the separator contents. In most areas the sediment, once dewatered, can be disposed of in a sanitary landfill. It is not anticipated that the sediment would be classified as hazardous waste. In some areas, mixing the water with the sediment will create a slurry that can be discharged into a trunk sanitary sewer. In all disposal options, approval from the dsposal facility operator/agency is required. Petroleum waste products collected in Stormceptor(oil/chemical/fuel spills) should be removed by a licensed waste management company. What if I see an oil rainbow or sheen at the Stormceptor outlet? With a steady influx of water with high concentrations of oil, a sheen may be noticeable at the Stormceptor outlet. This may occur because a rainbow or sheen can be seen at very small oil concentrations(< 10 ppm). Stormceptor will remove over 95% of all free oil and the appearance of a sheen at the outlet with high influent oil concentrations does not mean that the unit is not working to this level of removal. In addition, if the influent oil is emulsified,the Stormceptor will not be able to remove it. The Stormceptor is designed for free oil removal and not emulsified or dissolved oil conditions. Stormceptor Appendix 1 Stormceptor Affiliates Stormceptor St®rmeept®r® Affiliates CANADA FIBERGLASS Stormceptor Canada Inc. 416-626-0840/ 1-800-565-4801 Todd Neff CONCRETE Lafarge Canada Inc. 403-292-9502/ 1-888-422-4022 AB, MB,NW. ON, SK 604-502-5236 Chris Hughes BC Centennial Concrete Pipe &Products Inc. 519-622-7574/ 1-888-888-3222 Brian Lee ON L6cuyer et Fils Lt6e. 450-454-3928 R6jean Tremblay PQ Strescon Limited 902-494-7400 Andrew LeVatte NS 506-633-8877 Gary Bennett NB, PE, NF Stormceptor UNITED STATES CSR Hydro Conduit 1-800-909-7763 CSR National Stormceptor® Information AK, AL,AR,AZ, CA, CT DC,DE,FL, GA,HI, s.IL,IN, KS,KY,LA,MA,MD,ME, MI,MO,MS,NC,NE,NH, NM,NV, OK, OR,RI, SC,TN, TX,VA,VT, WA The Cretex Companies 612-441-2121 Brad Fossum MN, IA,n. IL WI Camtek Construction Products 724-327-3400 Andy Virostek NY,NJ, OH, PA, WV Carder Concrete Products 303-791-1600 Don Grzesiek CO Wyoming Concrete Products 307-265-3100 John Finch ID,MT,ND, SD,UT,WY Stormceptor AUSTRALIA CONCRETE CSR Humes 617 3364-2933 Colin Roome Australia CSR Construction Materials 613 9286-2624 Keith Capom Pacific Rim Stormceptor N www.stormceptor.com Stormceptor