HomeMy WebLinkAboutConstruction Notes - Consultant Review - 11/20/2019 North Andover Health Department Community and Economic Development Division ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES LOCATION INFORMATION ADDRESS: 2017 Salem St MAP: 108.A LOT: 34 INSTALLER: William T. Sawyer Arco Ex 978-360-7832 DESIGNER: Benjamin C. Osgood PE 978-435-1324 PLAN DATE: 02.06.2019 revision 03/12/19, 03/25/19, 04/05/19, 05/30/2019 BOH APPROVAL DATE ON PLAN: 4/26/19 INSPECTIONS TANK INSPECTION: DATE OF BED BOTTOM INSPECTION: 7/26/2019 B. LaGrasse DATE OF FINAL CONSTRUCTION INSPECTION: 8/16/19 DATE OF FINAL GRADE INSPECTION: 11/5/2019 B. LaGrasse SITE CONDITIONS Contractor reports any changes to design plan Existing septic tank properly abandoned Internal plumbing all to one building sewer Topography not appreciably altered Comments: 8/16/19 – Foundation poured, no house built. Well installed in general location of plan. SEPTIC TANK Building sewer in continuous grade, on compacted firm base Cleanouts per plan Bottom of tank hole has 6” stone base Weep hole plugged 1500 gallon tank has been installed H-10 loading Monolithic tank construction Water tightness of tank has been achieved by visual testing Inlet tee installed, centered under access port Outlet tee installed, centered under access port (gas baffle) 24 inch cover to within 6” of finish grade installed over one access port Hydraulic cement around inlet & outlet Comments: 8/16/19 – 2 compartment tank with rubber boots installed DISTRIBUTION-BOX Installed on stable stone base H-20 D-Box Inlet tee (if pumped or >0.08’/foot) Hydraulic cement around inlet & outlets Observed even distribution Speed levelers provided (not required) Schedule 40 PVC Pipe Comments: SOIL ABSORPTION SYSTEM (General) Bottom of SAS excavated down to C soil layer, as provided on plan Size of SAS excavated as per plan Title 5 sand installed, if specified on plan 40 Mil HDPE barrier installed Laterals installed and ends connected to header (and vented if impervious material above) Elevations of laterals and chambers installed as on approved plan Retaining wall (boulder / concrete / timber/ block) Final cover as per plan Comments: FINAL GRADE Loamed Seeded Cover per plan Comments: DOCUMENTS NEEDED Certification of Installation Form submitted By engineer and signed and dated by Engineer and installer As-Built Plan BM = 95.52 HR = 9.27 HI = 104.79 SYSTEM ELEVATIONS ROD AS-BLT INVERT DESIGN INVERT ELEVATION ELEV ELEV Building Sewer OUT Septic Tank IN 1.42 103.04 106.00 Septic Tank OUT 1.74 102.72 105.80 Distribution Box IN 7.25 97.21 97.14 Distribution Box OUT 7.45 97.01 96.97 Lateral 1 BEGINNING 7.54 96.92 96.89 Lateral 1 END 7.74 97.12 96.70 Lateral 2 BEGINNING 7.54 96.92 96.89 Lateral 2 END 7.76 96.70 96.70 Lateral 3 BEGINNING 7.55 96.91 96.89 Lateral 3 END 7.74 97.12 96.70 8/16/19 – Did not survey building sewer pipe but visually apparent that there is at least a 2% slope to the pipe. SKETCH PLAN