HomeMy WebLinkAboutConstruction Notes - Consultant Review - 1985 SALEM STREET 9/25/2019
North Andover Health Department
Community and Economic Development Division
ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES
LOCATION INFORMATION
ADDRESS: 1985 Salem Street MAP: 106.B LOT: 248
INSTALLER: Dave Maynard
DESIGNER: Christiansen and Sergi
PLAN DATE: May 5, 2017, rev Aug 2017, rev Jan 17, 2018
BOH APPROVAL DATE ON PLAN: 01/29/2018
INSPECTIONS
TANK INSPECTION: 5/24/2019
DATE OF BED BOTTOM INSPECTION: 5/29/2019
DATE OF FINAL CONSTRUCTION INSPECTION: 6/6/19
DATE OF FINAL GRADE INSPECTION: 9/23/2019
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:
6/6/19: Extensive site grading changes occurred for construction. Likely not a
violation of Title 5, just worth noting.
6/6/19: Benchmark on plan has been removed, new benchmarks provided and
reported to have been established by engineer. Requested confirmatory letter
from engineer.
6/6/19: Well observed to have been drilled in general location as per approved
plan
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)
24 inch cover to within 6” of finish grade
installed over one access port
Hydraulic cement around 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: 6/6/19 – Very slight preferential flow to one arm observed.
Contractor to install leveling devices
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: Sand Onsite 5/29/2019 – 85’x25’
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
SYSTEM ELEVATIONS
BM 2A reported to be 146.62, BM 1A reported to be 122.07
AS-BLT INVERT DESIGN INVERT
ELEV ELEV
Building Sewer OUT 140.66 134.00
Septic Tank IN 134.93 132.40
Septic Tank OUT 134.73 132.15
Distribution Box IN 120.27 120.26
Distribution Box OUT 120.07 120.09
Lateral 1 Beg 120.00 119.99
Lateral 1 End 119.84 119.83
Lateral 2 Beg 120.00 119.99
Lateral 2 End 119.85 119.83
Lateral 3 Beg 120.01 119.99
Lateral 3 End 119.84 119.83
Lateral 4 Beg 120.01 119.99
Lateral 4 End 119.84 119.83