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Home My WebLink AboutSeptic Construction Notes - Consultant Review - 288 STILES STREET 10/15/2020 North Andover Health Department Community and Economic Development Division ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES LOCATION INFORMATION ADDRESS: 288 Stiles Street MAP: 107.D LOT: 22 INSTALLER: James Boraczek - 978-479-5236 DESIGNER: Benjamin Osgood Jr., PE - PLAN DATE: June 28, 2019, revised 07/02/2020, 06/07/2020, 7/19/2019 BOH APPROVAL DATE ON PLAN: 7/14/2020 INSPECTIONS permit # 55538 TANK INSPECTION: 9.9.2020 Stephen Casey DATE OF BED BOTTOM INSPECTION: 9.14.2020 Stephen Casey DATE OF FINAL CONSTRUCTION INSPECTION: 9/24/20 DATE OF FINAL GRADE INSPECTION: 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: 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 Neoprene boots on inlet & outlet Comments: Tank & Pump Chamber already in hole before stone inspected. 6” Visible when stone dug up between septic tank and pump chamber. 9/24/20 – Building sewer runs under driveway and backfilled prior to inspection. PUMP CHAMBER Bottom of tank hole has 6" stone base Weep hole plugged 1000 gallon Pump Chamber installed H-10 loading Monolithic tank construction Inlet tee installed, centered under access port Pump(s) installed on stable base Alarm float working Pump On/Off floats working Separate on/off floats Drain hole in pressure line 24” cover at final grade installed over pump access port Water tightness of tank has been achieved by Visual testing Neoprene boots on inlet & outlet Comments: See Septic Notes on Tank – Stephen Casey 9/24/20 – Liberty Pump LE 41 installed instead of Hydromatic SP40 per design. CONTROL PANEL Alarm & Pump are on separate circuits Alarm sounds when float is tripped Location of control panel: side of barn Alarm signal located inside: side of barn Comments: 9/24/20 – Control panel on side of barn nearest tanks DISTRIBUTION-BOX Installed on stable stone base H-20 D-Box Inlet tee (if pumped or >0.08’/foot) Neoprene boots on 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 (74x54) 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: Sand good, some in hole load in truck ok. Remove rock in middle of field. Drywell found in corner of bed, closest to house/barn – will level out before sand poured. @ Tank Hole Inspection – will make sure rocks removed & sand is good, plus will check elevations before sand poured into hole. – Stephen Casey FINAL GRADE Loamed Seeded Cover per plan Comments: 5.15.2020 eroding collapsing near septic tank & pump chamber – replaced – S. Casey DOCUMENTS NEEDED Certification of Installation Form submitted By engineer and signed and dated by Engineer and installer As-Built Plan BM = __100.00__ HR = __2.98____ HI = __102.98__ SYSTEM ELEVATIONS ROD AS-BLT INVERT DESIGN INVERT ELEVATION ELEV ELEV Benchmark Building Sewer OUT 2.35 100.30 NF Septic Tank IN 4.87 97.78 97.55 Septic Tank OUT 5.21 97.44 97.30 Pump Chamber IN 5.30 97.35 97.10 Pump Chamber OUT 5.62 97.03 96.85 Distribution Box IN 1.54 101.11 100.97 Distribution Box OUT 1.68 100.97 100.80 Lateral 1 BEG 1.92 100.73 100.70 Lateral 1 END 2.28 100.37 100.37 Lateral 2 BEG 1.98 100.67 100.70 Lateral 2 END 2.27 100.38 100.37 Lateral 3 BEG 1.96 100.69 100.70 Lateral 3 END 100.37 Lateral 4 BEG 1.92 100.73 100.70 Lateral 4 END 2.25 100.4 100.37 SKETCH PLAN