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HomeMy WebLinkAboutConstruction Notes - Consultant Review - 181 JOHNNY CAKE STREET 5/26/2021 North Andover Health Department Community and Economic Development Division ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES LOCATION INFORMATION ADDRESS: 181 Johnny Cake Street MAP: 107A LOT: 190 INSTALLER: Peter Nardone DESIGNER: Derek Fullerton PLAN DATE: 3/31/21 BOH APPROVAL DATE ON PLAN: INSPECTIONS TANK INSPECTION: Steve Casey – 4.26.2021 @10 am DATE OF BED BOTTOM INSPECTION: DATE OF FINAL CONSTRUCTION INSPECTION: May 18, 2021 DATE OF FINAL GRADE INSPECTION: 5/24/2021 B. LaGrasse SITE CONDITIONS Contractor reports any changes to design plan Existing septic tank properly abandoned, if present Internal plumbing all to one building sewer Topography not appreciably altered Comments: 5/18/21 – Contractor reports ledge on edge of overdig and on side of tank hole, was discussed with health inspector previously SEPTIC TANK Building sewer in continuous grade, on compacted firm base Cleanouts per plan Bottom of tank hole has 6” stone base Tank size and loading per plan Monolithic tank construction / 2-piece (circle one) If monolithic, water tightness of tank has been achieved by visual testing If 2-piece, water tightness of tank has been achieved by water / vacuum test (circle one) Inlet tee installed, centered under access port Outlet tee installed, centered under access port Gas baffle / effluent filter installed (circle one) If effluent filter, riser to finished grade over filter Riser with cover to within 6” of finish grade installed over one access port Manhole and riser minimum 20 inch diameter Pipe penetrations appear watertight using rubber boots / hydraulic cement (circle one) Comments: 5/18/21 – Effluent filter at first compartment, riser with cover to grade. Tank empty but visually appears to be a smooth concrete pour. Contractor to put firm stable base beneath building sewer. DISTRIBUTION-BOX Installed on stable stone base H-20 D-Box Inlet tee (if pumped or >0.08’/foot) Hydraulic cement around inlet & outlets Even distribution observed Schedule 40 PVC Pipe Comments: 5/18/21 – Contractor to put risers on to within 6” of finished grade SOIL ABSORPTION SYSTEM (General) Bottom of SAS excavated down to specified soil layer, as provided on plan Size of SAS excavated as per plan Sand installed, if specified on plan Sand displays few fines when handled 40 Mil HDPE barrier installed, if specified on design plan Laterals installed and ends capped or connected to header (and vented if impervious material above) Retaining wall material, location and height if specified on plan Comments: 5/18/21 – Inspection ports to be raised to finished grade, filter fabric over leach stone on site and to be installed. FINAL GRADE Final cover as per plan Loamed Seeded Comments: DOCUMENTS NEEDED Certification of Installation Form submitted by designer and signed and dated by designer and installer As-Built Plan by designer BM = HR = HI = 179.55 SYSTEM ELEVATIONS ROD AS-BLT INVERT DESIGN INVERT ELEVATION ELEV ELEV Building Sewer OUT 6.00 173.22 173.38 Septic Tank IN 6.11 173.11 173.03 Septic Tank OUT 6.39 172.83 172.78 Distribution Box IN 6.64 172.58 172.61 Distribution Box OUT 6.78 172.44 172.44 Lateral 1 BEGINNING 6.85 172.37 172.44 Lateral 1 END 7.09 172.13 172.27 Lateral 2 BEGINNING 6.85 172.37 172.44 Lateral 2 END 7.05 172.17 172.27 Lateral 3 BEGINNING 6.85 172.37 172.44 Lateral 3 END 7.08 172.14 172.27 Lateral 4 BEGINNING 6.85 172.37 172.44 Lateral 4 END 7.08 172.14 172.27 5/18/21 – Installer reports SAS was dropped slightly in order to make pitch from distribution box. He reports he coordinated this with designer who reports this is acceptable due to lack of water table offset at this location.