HomeMy WebLinkAboutFinal Construction Notes - Consultant Review - 1565 SALEM STREET 7/12/2021
North Andover Health Department
Community and Economic Development Division
ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES
LOCATION INFORMATION
ADDRESS: 1565 Salem Street MAP: 106.B LOT: 3
INSTALLER: Buddy Watson
DESIGNER: Vladimir Nemchenok – Merrimack Engineering
PLAN DATE: final revision 05.11.2021
BOH APPROVAL DATE ON PLAN: 05.21.2021
INSPECTIONS
TANK INSPECTION: 6.8.2021 S.Casey
DATE OF BED BOTTOM INSPECTION:
DATE OF FINAL CONSTRUCTION INSPECTION: 6/22/21
DATE OF FINAL GRADE INSPECTION:
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: 6/8/2021 Stone all set, 6 Inches in hole – S. Casey
6/22/21 – Original building sewer maintained for about 10’ from house, then
transition to Sch 40 PVC. D. Ottenheimer
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 24 inch diameter
Pipe penetrations appear watertight using
rubber boots / hydraulic cement (circle one)
Comments: 6/22/21 – Inlet tee not under tank opening. To be removed and
replaced. D. Ottenheimer
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 (and vented if impervious
material above)
Retaining wall material, location and height if
specified on plan
Comments:
6.10.2021 and 6.11.2021 – with overdig 50’ x 25’ C layer B.L. 10 yr 4/6 about 48”
6.11.2021 corrections made – pass
FINAL GRADE
Final cover as per plan
Loamed
Seeded
Comments:
3 covers to grade & hydro seeded – S. Casey
DOCUMENTS NEEDED
Certification of Installation Form submitted
by designer and signed and dated by
designer and installer
As-Built Plan by designer
BM = 98.08
HR = 2.49
HI = 100.57
SYSTEM ELEVATIONS
ROD AS-BLT INVERT DESIGN INVERT
ELEVATION ELEV ELEV
Building Sewer OUT 5.09 95.15 96.70
Septic Tank IN 5.19 95.05 94.95
Septic Tank OUT 5.58 94.66 94.70
Distribution Box IN 5.87 94.37 94.35
Distribution Box OUT 6.08 94.16 94.18
Lateral 1 BEGINNING 6.10 94.14 94.10
Lateral 1 END 6.35 93.89 93.90
Lateral 2 BEGINNING 6.10 94.14 94.10
Lateral 2 END 6.33 93.91 93.90
Lateral 3 BEGINNING 6.08 94.16 94.10
Lateral 3 END 6.33 93.91 93.90