Eastham Water System Water Supply Investigations Status Update Board of Selectmen September 21,...
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Transcript of Eastham Water System Water Supply Investigations Status Update Board of Selectmen September 21,...
![Page 1: Eastham Water System Water Supply Investigations Status Update Board of Selectmen September 21, 2009.](https://reader036.fdocuments.net/reader036/viewer/2022062409/5697bfae1a28abf838c9c9fd/html5/thumbnails/1.jpg)
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Project Coordination ActivitiesProject Coordination Activities
Meeting with Cape Cod National Meeting with Cape Cod National Seashore –Seashore – August 27 August 27
Cape Cod Commission Cape Cod Commission USDA Meeting – September 16USDA Meeting – September 16
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Nauset Regional High School
Drill Site
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Drill Site at NRHS
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Mud System
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Drill Cuttings - Aquifer Zone
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Well Screen
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Well Development
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Nauset High SchoolHydrogeologic Conditions
Deep boring installed to 400’
Water table at 50’
Good material to 105’Silts and clays below
Installed well at 90’
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District H District H
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District HDistrict HHydrogeologic Conditions Summary Hydrogeologic Conditions Summary
Deep boring: 405’ bgsDeep boring: 405’ bgs DTW – 30’ bgsDTW – 30’ bgs Potentially productive zones:Potentially productive zones:
Shallow 106-116’ bgsShallow 106-116’ bgsIntermediate 207-217’ bgsIntermediate 207-217’ bgs
Freshwater/Saltwater Interface 343 feetFreshwater/Saltwater Interface 343 feet
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District HWell Installations
Deep well: 346’Deep well: 346’
Intermediate well: 207’ Intermediate well: 207’
Shallow well: 116’Shallow well: 116’
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District H
Well Development
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District H
Well Development
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District H Drill Log
Potentially productive aquifer zone (sand) 80-218’
Fresh Water/Salt water interface: 143’ bgs
Specific Capacity Shallow: 33 gpm/ft Intermediate: 5-10+ gpm/ft
Water quality: Shallow – excellentIntermediate – Waiting on data
Silt and Clay
Sand
Fresh WaterSalt Water
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District HDistrict HHydrogeologic IssuesHydrogeologic Issues
Response of salt water transition zone Response of salt water transition zone with pumpingwith pumping
Proximity of vernal poolsProximity of vernal pools Groundwater/vernal pool interactionGroundwater/vernal pool interaction
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District H Deep Test Well
19.00
19.25
19.50
19.75
8/27/09 8/28/09 8/29/09 8/30/09 8/31/09 9/1/09 9/2/09 9/3/09 9/4/09 9/5/09
Tidal influences on water level in deep test well
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Vernal Pools
Single Family Residential> 80,000 sq. ft.
General Business
General Industrial
Single Family Residential 40,000-79,999 sq. ft.
Conservation/Passive Recreation
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District GDrill Site
•Drill site and 400’ buffer entirely within Town-owned land
• Currently installing deep boring
• Site has available land for more than one test site
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Eastham Water Supply Investigations
Updated Schedule
8 15 22 29 6 13 20 27 3 10 17 24 31 7 14 21 28 5 12 19 26 2 9 16 23 30 7 14 21 28 4 11 18 25 1 8 15 22 1 8 15 22 29
Phase I Tasks
Task 1. Project and Regulatory Coordination
Task 2. Orleans Water Source Feasibility Study
Task 3. Site Survey
Task 4. Initial Site Investigations
Nauset Regional High School
District H
District G
Task 5. Groundwater Modeling
Task 6. Request for Site Exam
Nauset Regional High School
District H
District G
Task 7. Request Approval to Conduct Pump Test
NovemberOctober FebruaryDecember2009 2010
Project Task June JanuaryJuly August MarchSeptember
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