HomeMy WebLinkAbout- Consultant Review - 50 FARNUM STREET 12/17/2018
North Andover Health Department
Community and Economic Development Division
ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES
LOCATION INFORMATION
ADDRESS: 50 Farnum Street MAP: 107.A LOT: 87
INSTALLER: Peter Breen
DESIGNER: Christiansen & Sergi
PLAN DATE: October 1, 2018, revised November 6, 2018
BOH APPROVAL DATE ON PLAN: 11/20/2018
INSPECTIONS
TANK INSPECTION: 12/7/18, 12/3/2018 see photos
DATE OF BED BOTTOM INSPECTION: 11/29/2018
DATE OF FINAL CONSTRUCTION INSPECTION: 12/7/18
DATE OF FINAL GRADE INSPECTION: 12/11/2018
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/effluent filter)
_____ inch cover to within 6” of finish grade
installed over one access port
Hydraulic cement around inlet & outlet
Comments: Gas baffle only – no filter required with Presby, Tank crushing see
photos
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: 25x42
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 = _99.72_____
HR = ______
HI = _101.88____
SYSTEM ELEVATIONS
ROD AS-BLT INVERT DESIGN INVERT
ELEVATION ELEV ELEV
Benchmark 2.16
Building Sewer OUT 1.83 99.7 99.58
Septic Tank IN 2.15 99.38 99.56
Septic Tank OUT 2.38 99.15 99.01
Pump Chamber IN
Pump Chamber OUT
Distribution Box IN 2.65 98.88 98.95
Distribution Box OUT 2.81 98.72 98.78
Lateral 1 TOP 3.0 98.53 98.58
Lateral 1 INVERT
Lateral 2 TOP 3.0 98.53
Lateral 2 INVERT
Lateral 3 TOP 3.0 98.53
Lateral 3 INVERT
Lateral 4 TOP 3.0 98.53
Lateral 4 INVERT
Lateral 5 TOP 3.0 98.53
Lateral 5 INVERT
Lateral 6 TOP 3.0 98.53
Lateral 6 INVERT
Lateral 7 TOP 3.0 98.53
Top of Chamber
Bottom of Bed/Chamber