HomeMy WebLinkAboutSeptic Construction Notes - Consultant Review - 531 JOHNSON STREET 8/13/2024
North Andover Health Department
Community and Economic Development Division
ONSITE WASTEWATER SYSTEM CONSTRUCTION NOTES
LOCATION INFORMATION
ADDRESS: 531 Johnson Street MAP: 098.A LOT: 0014
INSTALLER: John T. Shaw - 978-815-7411
DESIGNER: Bill Dufresne – Merrimack Engineering Services (978) 502-6206
(978) 475-3555 x-20
PLAN DATE: 02.02.2024
BOH APPROVAL DATE ON PLAN: 02.29.2024
INSPECTIONS
TANK INSPECTION: 05.23.2024
DATE OF BED BOTTOM INSPECTION:
DATE OF FINAL CONSTRUCTION INSPECTION:
DATE OF FINAL GRADE INSPECTION: 6/11/24 D. Ottenheimer
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
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
Effluent filter installed
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 20 inch diameter
Pipe penetrations appear watertight using
rubber boots
Comments:
PUMP CHAMBER
(Delete if not present) Bottom of tank hole has 6" stone base
Weep hole plugged
1000 gallon Pump Chamber installed
H-10 loading
Monolithic tank construction
Inlet tee installed, centered under access port
Pump(s) installed on stable base
Alarm float working
Pump On/Off floats working
Drain hole in pressure line
20” cover at final grade installed over pump
access port
Water tightness of tank has been achieved by
Visual observation
Neoprene boots around inlet & outlet
Comments:
CONTROL PANEL
(Delete if not present) Alarm & Pump are on separate circuits
Visual & audible alarm works as intended
Location of control panel: Basement
Comments:
DISTRIBUTION-BOX
Installed on stable stone base
H-20 D-Box
Baffle wall
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:
FINAL GRADE
Final cover as per plan
Loamed
Seeded
Cover per plan
Comments: S. Pierce
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 = 5.65
HI = 105.65
SYSTEM ELEVATIONS
ROD AS-BLT INVERT DESIGN INVERT
ELEVATION ELEV ELEV
Building Sewer OUT 2.87 102.45 102.6
Septic Tank IN 5.10 100.22 100.2
Septic Tank OUT 5.32 100.00 99.95
Pump Chamber IN 5.36 99.96 99.00
Pump Chamber OUT
Distribution Box IN
Distribution Box OUT 4.08 101.24 101.18
Lateral 1 BEGINNING 4.18 101.14 101.10
Lateral 1 END 4.39 100.93 100.90
Lateral 2 BEGINNING 4.18 101.14 101.10
Lateral 2 END 4.39 100.93 100.90
Lateral 3 BEGINNING 4.18 101.14 101.10
Lateral 3 END 4.39 100.93 100.90