HomeMy WebLinkAboutConstruction Notes - Consultant Review - 326 CAMPBELL ROAD 7/30/2020
North Andover Health Department
Community and Economic Development Division
ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES
LOCATION INFORMATION
ADDRESS: 326 Campbell Road MAP: 106.D LOT: 0023
INSTALLER: Brendan Larkin – Larkin & Larkin 781-944-7808
DESIGNER: James S. Fairweather Andover Consultants 978-687-3828 ex 13
PLAN DATE: March 28, 2019
BOH APPROVAL DATE ON PLAN: final revision May 21, 2019 approved May
23, 2019
INSPECTIONS
TANK INSPECTION:
DATE OF BED BOTTOM INSPECTION: 5/27/2020 thru 5/29/2020 S. Casey
DATE OF FINAL CONSTRUCTION INSPECTION: 6/23/2020
DATE OF FINAL GRADE INSPECTION: 7/9/2020
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-20 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
Hydraulic cement around inlet & outlet
Comments: S. Casey >6”stone at bottom of tank hole. 6/23/20 – Pipe bedding
into and out of septic tank to be completed
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 (must be at
least 59 x 37)
Title 5 sand installed, if specified on plan
(sample ok, will recheck on site)
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: S. Casey- 5.27.2020 Inspection 1 @ 9:45 am size ok, lots of rocks in
bottom of bed, will re-inspect later today will also check the Title 5 sand
5.27.2020 Inspection 2 @ 1.45pm over dig and field > 59 x 37 but rock in one
corner cutting into over dig
5.28.2020 Sand good, large rocks removed , one corner @ 4 ½’ over dig
corrected, Title 5 sand and 5 ft around corner working on adjusting correct to
meet 5ft over dig
5.29.2020 4” intrusion by massive rock to be addressed by Andover consultants
6ft over dig on other side has space to adjust
6/23/20 – Trench ends connected to header to be completed
FINAL GRADE
Loamed
Seeded – see letter in correspondence
Cover per plan
Comments:
DOCUMENTS NEEDED
Certification of Installation Form submitted
By engineer and signed and dated by
Engineer and installer
Viewpoint permit # 53781
As-Built Plan
BM = __124.82__
HR = __6.21____
HI = __131.03__
SYSTEM ELEVATIONS
ROD AS-BLT INVERT DESIGN INVERT
ELEVATION ELEV ELEV
Benchmark 6.21
Building Sewer OUT
Septic Tank IN 3.32 127.38 127.35
Septic Tank OUT 3.61 127.09 127.10
Distribution Box IN 3.92 126.78 126.77
Distribution Box OUT 4.08 126.62 126.60
Lateral 1 BEG 4.11 126.59 126.55
Lateral 1 END 4.40 126.30 126.30
Lateral 2 BEG 4.13 126.57 126.55
Lateral 2 END 4.39 126.31 126.30
Lateral 3 BEG 4.13 126.57 126.55
Lateral 3 END 4.40 126.30 126.30
BARRIER 4.30 126.73
6/23/20 – Confirmed that building sewer pitch > 1%
SKETCH PLAN