HomeMy WebLinkAbout24IWC7-339 Chesterfield Rd Site Investation for Subsurface Sewage Disposal 3-11-2024
SITE INVESTIGATION FOR SUBSURFACE SEWAGE DISPOSAL
Owner: Robert & Pamela Howard Location: 339 Chesterfield Road, Montville
Deep Test Hole Data/Soil Descriptions
DATE: 3/11/2024
Test Hole # 1 Test Hole # 2 Test Hole # 3 Test Hole # 4
0-4” Top Soil
4”-31” Tan Fine Loamy
Sand
31”-48” Gray Fine
Sand
0-8” Top Soil
8”-22” Tan Fine Loamy
Sand
22”-50” Gray Very Fine
Sand
0-8” Top Soil
8”-18” Tan Fine Loamy
Sand
18”-60” Gray Very Fine
Sand
0-8” Top Soil
8”-22” Tan Fine Loamy
Sand
22”-70” Gray Very Fine
Sand
Mottling: --- Mottling: --- Mottling: --- Mottling: ---
GW: --- GW:--- GW: --- GW: 68”
Ledge: 48” Ledge: 50” Ledge: 60” Ledge: 70”
Roots: 26” Roots: 30” Roots: --- Roots: ---
Restrictive: 48” Restrictive: 50” Restrictive: 60” Restrictive: 70”
Test Pits 1&2 located in proposed Reserve Area. Test Pits 3&4 located in proposed Primary Area.
Groundwater Table: Near Max
Percolation Test Data
Date: 3/11/2024
Perc # A Perc Rate: 10.1-20 Perc # B Perc Rate: 8.9 min/in
Depth: 18” (Reserve Area) Depth: 18” (Primary Area)
Presoak time: 1 Hour Presoak: 1 Hour
Time
Reading
Time
Reading
Time
Reading
Time
Reading
11:30 3.48” 12:30 8.04”
11:35
3.36”
12:35
11.16”
11:40 4.20”
11:45
5.04”
11:50 5.16” 11:55 6.84”
12:00 5.88”
12:05
7.92”
12:10 6.60” 12:15 9”
12:20 7.32”
12:25
10”
Soil Moisture: Medium
Location: 339 Chesterfield Road, Montville
Location Drawing Including all Test Holes and Percolation Tests
*Test pits and perc test holes located by RCL Thompson LLC.*
SPECIAL CONDITIONS CONCLUSIONS
Design Flow > 2000 GPD Suitable for Sewage Disposal x
Public Water Supply Watershed Unsuitable for Sewage Disposal
(Based on area tested)
Probable High Groundwater Additional Investigation Required
Ground Water < 36 inches below grade Wet Season Monitoring Required
Slope > 25% Retest During Wet Season
Perc Rate < 1 min/inch Licensed Engineer’s Plan Required x
Perc Rate < 5 min/inch (24″ above
water)
Other:
Perc Rate > 30 min/inch
Ledge < 5 feet below grade x
Limited Suitable Area
Open Watercourse or Wetlands x
Flood Plain/Seasonal Flooding
DESIGN RECOMMENDATIONS/COMMENTS: A septic design for a 3-bedroom home will
require a 1,000 gallon two compartment septic tank and 495 square feet of ELA. The maximum
depth into grade is not to exceed 0”. MLSS must be addressed. An engineered plan is to be
submitted for review prior to any permit to construct being issued. The existing house,
system, and well are to be properly abandoned. Must get approval from Town of Montville
Zoning Department and Wetlands Commission.
Form Completed By: Donovan Moe, Environmental Health Inspector
Others Present For Site Investigation: Ryan Thompson, Engineer & Surveyor RCL Thompson