HomeMy WebLinkAboutConsultant Review - 130 WINDKIST FARM ROAD 6/20/2018
North Andover Health Department
Community and Economic Development Division
ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES
LOCATION INFORMATION
ADDRESS:130 Windkist Farm Road MAP: 109.0 LOT: 0054
INSTALLER: Dean Dynam
DESIGNER: Christiansen & Sergi
PLAN DATE: June 30, 2017 with a final revision date of August 23, 2017,
received on August 28, 2017
BOH APPROVAL DATE ON PLAN: 9/15/2017
INSPECTIONS
TANK INSPECTION: 5/11/2018
DATE OF BED BOTTOM INSPECTION: 4/24/2018
DATE OF FINAL CONSTRUCTION INSPECTION: 5/31/18
DATE OF FINAL GRADE INSPECTION: 6/19/2018
SITE CONDITIONS
Contractor reports any changes to design plan
n/a Existing septic tank properly abandoned
Internal plumbing all to one building sewer
n/a Topography not appreciably altered
Comments: Site is terraced from front to back with significant grade changes.
Finish grading over the septic system will be terraced as well and will utilitize the
3’ max cover over the leach trenches
SEPTIC TANK
Building sewer in continuous grade, on
compacted firm base
N/A 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
(effluent filter)
20" inch cover to finish grade installed over
middle access port
Neoprene boots 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:
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
N/A40 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
N/ARetaining wall (boulder / concrete / timber/ block)
Final cover as per plan
Comments: B. LaGrasse – Excavation ok. Sand coming later this week.
Needs tank inspection.
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
Setup #1 Setup #2
BM = 236.49 236.49
HR = 0.00 6.41
HI = 236.49 242.90
SYSTEM ELEVATIONS
ROD AS-BLT INVERT DESIGN INVERT
ELEVATION ELEV ELEV
Benchmark
Setup #2
Building Sewer OUT 3.34 239.21 239.19
Septic Tank IN 3.92 238.63 237.81
Septic Tank OUT 4.20 238.35 237.56
Setup #1
Distribution Box IN 7.32 228.82 228.76
Distribution Box OUT 7.54 228.60 228.59
Lateral 1 TOP 7.62 / 7.85
Lateral 1 INVERT 228.52 / 228.29 228.49 / 228.25
Lateral 2 TOP 7.63 / 7.88
Lateral 2 INVERT 228.51 / 228.26 228.49 / 228.25
Lateral 3 TOP 9.38/ 9.65
Lateral 3 INVERT 226.76 / 226.49 226.74 / 226.50
Lateral 4 TOP 9.30/ 9.55
Lateral 4 INVERT 226.84 / 226.59 226.74 / 226.50
Bottom of Bed T#1&2 9.48 / 9.48 227.01 / 227.01 227.00 / 227.00
Bottom of Bed T#3&4 11.00 / 11.30 225.49 / 225.19 225.25 / 225.25
CRITICAL SETBACK DISTANCES
Mark those distances checked in the field against the design plan and regulatory
setback
Tank SAS Sewer
Property line 10 10 --
Cellar wall 10 20 --
Inground pool 10 20 --
Slab foundation 10 10 --
Deck, on footings, etc 5 10 --
1
Waterline 10 10 10
2
Private drinking well 75 100 50
Irrigation well 75 100
Surface Water 25 50
Bordering Vegetated Wetland ,
3
Salt Marsh, Inland / Coastal Bank 75 100
Wetlands bordering surface
water supply or trib. (in Watershed) 150 150
Trib. to surface water supply 325 325
Public well 400 400
Interim Wellhead Prot. Area
Reservoirs 400 400
Drains (wat. supply/trib.) 50 100
Drains (intercept g.w.) 25 50
Drains (Other) Foundation 10 (5) 20 (10)
Drywells 20 25
1
Suction line 222(2)
2
100 feet is a minimum acceptable distance and no variance is allowed for a lesser distance (NA 5.02).
3
As defined in 310 CMR 10.55, 10.32, 10.54, and 10.30, respectively, pursuant to 15.211(3), also by NA
wetland bylaws
