HomeMy WebLinkAboutConstruction Notes - Consultant Review - 459 SALEM STREET 11/17/2022
North Andover Health Department
Community and Economic Development Division
ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES
LOCATION INFORMATION
ADDRESS: 459 Salem Street MAP: 038.0 LOT: 0055
INSTALLER: Peter Breen 978-687-7774
DESIGNER: Vladimir Nemchenok / Bill Dufrense 978-475-3555
PLAN DATE: 08.02.2022
BOH APPROVAL DATE ON PLAN: 09.28.2022
INSPECTIONS
TANK INSPECTION:
DATE OF BED BOTTOM INSPECTION: 10.03.2022 S. Casey
DATE OF FINAL CONSTRUCTION INSPECTION: 10-19-22 D. Ottenheimer
DATE OF FINAL GRADE INSPECTION: 10/31/2022
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:
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 ___ inch diameter
Pipe penetrations appear watertight using
rubber boots / hydraulic cement (circle one)
Comments: N/A – Existing Tank to be Used
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:
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
Retaining wall material, location and height if
specified on plan
Comments: Bed Bottom – 10.03.2022 c layer visible, 30 x 50” LxW, Sand ok,
using Torremeo Sand
FINAL GRADE
Final cover as per plan
Loamed
Seeded
Cover per plan
Comments: 10.24.2022 S. Casey – Existing tank, 3 covers to grade need to bring
inspection port to grade. 10.31.2022 – inspection port to grade.
DOCUMENTS NEEDED
Certification of Installation Form submitted
by designer and signed and dated by
designer and installer
As-Built Plan by designer
BM = 100.00
HR = 0.30
HI = 100.30
SYSTEM ELEVATIONS
ROD AS-BLT INVERT DESIGN INVERT
ELEVATION ELEV ELEV
Benchmark
Building Sewer OUT
Septic Tank IN
Septic Tank OUT
Pump Chamber IN
Pump Chamber OUT
Distribution Box IN
Distribution Box OUT
Lateral 1 BEGINNING
Lateral 1 END 9.80 90.17 90.53
Lateral 2 BEGINNING
Lateral 2 END
Lateral 3 BEGINNING
Lateral 3 END
Lateral 4 BEGINNING
Lateral 4 END
10-18-22 – Location of top of foundation could not be accurately determined so
benchmark was not exact. Survey equipment was a laser with receiver located some 10’
in the air so was not accurate. Therefore, even though the rough calculations above
indicate SAS is not at correct elevation this should be viewed as an estimate and not an
exact measurement. Designer to provide as-built with confirmation. D. Ottenheimer