HomeMy WebLinkAboutConstruction Notes - Consultant Review - 61 FOREST STREET 6/4/2020
North Andover Health Department
Community and Economic Development Division
ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES
LOCATION INFORMATION
ADDRESS: 61 Forest Street MAP: 106.A LOT: 168
INSTALLER: James Boraczek – 978-479-5236
DESIGNER: Jack Sullivan – Sullivan Engineering Group – 781-854-8644
PLAN DATE: final revision date – 4/8/2019 approval date – 4/17/2019
BOH APPROVAL DATE ON PLAN: 5/15/2019
INSPECTIONS
TANK INSPECTION:
DATE OF BED BOTTOM INSPECTION: 10/24/2019 S. Casey 10/24/2019
DATE OF FINAL CONSTRUCTION INSPECTION: 11/5/2019 D. Ottenheimer
DATE OF FINAL GRADE INSPECTION: 11/12/19 S. Casey
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: 11/5/19 – Building sewer remained as cast iron for first 10’, then
transitions to PVC. Tree with benchmark was removed, top of foundation used as
benchmark.
SEPTIC TANK
Building sewer in continuous grade, on
compacted firm base
Cleanouts per plan
Bottom of tank hole has 6” stone base
10/21/2019 S. Casey
Weep hole plugged
1500 gallon tank has been installed
H-20
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
(effluent filter)
24 inch cover to finish grade installed effluent
filter
Rubber boots at inlet & outlet
Comments:
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:
SOIL ABSORPTION SYSTEM (Gravel-less Chambers)
Brand and Model of Chamber: Standard Quick
4 LP Infiltrator Chambers
Number of chambers per row: 8
Number of rows (trenches): 12
Comments: Total Chambers = __96__
FINAL GRADE 11/12/2019 S.Casey
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
Benchmark 1 used for Building Sewer & Septic Tank
BM = __106.04__
HR = __0.49____
HI = __106.53__
Benchmark 2 used for Distribution Box & S.A.S.
BM = __106.04__
HR = ___0.13___
HI = __106.17__
SYSTEM ELEVATIONS
ROD AS-BLT INVERT DESIGN INVERT
ELEVATION ELEV ELEV
Benchmark
Building Sewer OUT 7.29 98.91 100.00
Septic Tank IN 7.41 98.79 99.58
Septic Tank OUT 7.63 98.57 99.33
Distribution Box IN 11.93 93.91 93.93
Distribution Box OUT 12.10 93.74 93.72
Top of Chamber 12.05 94.12 94.07
Lateral 1 INVERT 12.05 93.79 93.65
Bottom of Bed/Chamber 12.65 93.52 93.40
11/5/19 – Building sewer measured at transition from cast iron to PVC pipe,
approximately 10’ from foundation wall. Distribution settled slightly and there is very
slight pitch in the wrong direction between distribution box outlet and plastic chamber
inlet. This should not impair operation of Soil Absorption System and was allowed to
remain in place.