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Roamingwood Wellhead Protection Capture Zone Prepared by: Mr. Brian Oram, PG, MS Mr. Bill Toothill,...
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Transcript of Roamingwood Wellhead Protection Capture Zone Prepared by: Mr. Brian Oram, PG, MS Mr. Bill Toothill,...
![Page 1: Roamingwood Wellhead Protection Capture Zone Prepared by: Mr. Brian Oram, PG, MS Mr. Bill Toothill, MS Wilkes University Geo Environmental Sciences and.](https://reader030.fdocuments.us/reader030/viewer/2022033105/56649ca55503460f949664a0/html5/thumbnails/1.jpg)
Roamingwood Wellhead Protection Capture Zone
Prepared by:
Mr. Brian Oram, PG, MSMr. Bill Toothill, MS
Wilkes UniversityGeo Environmental Sciences and
Environmental Engineering Department
http://www.wilkes.edu
http://www.water-research.net
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Project Location- Wayne County
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Roamingwood Sewer and Water Well Field- Project Location
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The Hideout
Well 1
Well 6
Well 4
Well 3
Well 2
Well 5
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Roamingwood Lake – The Hideout – Project Site
Photo by: Roamingwood Water and Sewer Association
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Roamingwood Well Field
Well # Depth, ft Yield, gpd DrasticScore
1 496 144,000 147
2 456 208,800 142
3 495 201,600 155
4 600 345,600 160
5 525 194,400 160
6 653 43,200 139
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Hazard Evaluation
• Drastic Analysis• Point and Non-Point
Sources• Physical Features
– Shallow Depth to Rock– Fractured Zones– Wetland Area
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Drastic AnalysisModerate (95 to 140); High (> 140)
Well # Depth, ft Yield, gpd DrasticScore
1 496 144,000 147
2 456 208,800 142
3 495 201,600 155
4 600 345,600 160
5 525 194,400 160
6 653 43,200 139
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Shallow Depth to BedrockBedrock near Surface or Less than 2 feet
Purple Areas – Shallow Depth to Bedrock
Well 3
Well 4
Well 5
Well 6
Well 1
Well 2
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Fractured Zones
Fracture Trace / Linear Feature
Well 1
Well 2 Well 6
Well 5
Well 4
Well 3
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Bedding Plane Fractures
Jointing
Photo by: Mr. Brian Oram (2004)
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Wastewater Pumping Stations
Well 1
Well 6Well 2
Well 5
Well 4
Well 3
Pump Stations
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Wastewater Pumping Stations
Photo by: Mr. Brian Oram (2005)
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Hazard Inventory
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Fixed RadiusMethod
R=( (Q*t)/(pi *n*H))^0.5Time Framet= 90 days, 1 year, 2 year, 5 year, 10 years
For example,Well 5t= 90 days, r = 232 feett = 365 days, r = 466 feett= 2 yr, r = 660 feett= 5 yr, r = 1043 feetT = 10 yr, r = 1475 feet
T = 90 days
T = 10 years
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Capture Zone Analysis• Model Used – WinFlow• Steady State – Transient Flow Model• Referenced to Modflow• Reference Head – 650 feet• Gradient – 0.012 ft/d• Porosity – 7 % (trail and error)• K = 0.2 ft/d (Pump Test Data)• Storage Coefficient – 1*e^-5 (confined system)• Groundwater Discharge Rate - - 0.00026
ft/day (baseflow)• Confining Layer – 200 feet below grade• Screened – Fully Penetrating• Saturated Thickness – 500 feet• Direction of Flow – Southeast (315 degrees)
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Capture Zone Analysis
The capture zone analysis was completed using theWinFlow Model. The area was divided into threeseparate zones. The zones were defined asfollows:
• Zone I: Zone of Direct Influence- area where all groundwater is captured.
• Zone II: Zone of Capture- area were natural flowpatterns are altered and contribute to the Zone I.
• Zone III: Contributes Water to the Zone II Area.
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Background Groundwater Contour Map
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SteadyState
AnalysisAverage Pumping
Rate
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Capture ZonesSteady State
Average PumpingRate
13 MG/Month
Zone 3
Zone 2
Zone 1
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Capture ZonesSteady State
Peak PumpingRate
20 MG/month
Zone 3Zone 2
Zone 1
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Time Based Delineation
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RecommendationsFor the Hideout
• Maintain Chemical Inventory and Improve Hazardous Waste Storage, Management, and Transport.
• Continue the STOP AND RECYCLED USED OIL FACT, Awareness Programs, other Educational Programs, and Hazardous Waste Disposal.
• Prohibit the use of Underground Fuel Storage or regulate the use.
• Encourage the use of water conservation devices.
• Minimize Site Disturbance and Provide Maximum Lot Coverage.
• Update Nutrient and Pesticide Management Plan for Golf Course.
• Encourage the Use of Rainwater Capture for Irrigation Use – Rather than Potable Water Use.
• Real-time monitoring of wells, including Well 6.
• Additional background monitoring of select wells for major cations and anions.
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High Lot Coverage – Increase Runoff and Decrease Natural Recharge
Paved Driveway – Roof runoff goesto driveway and immediately to road andstormwater system.
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Low Lot Coverage / Natural or Enhanced Green Areas – Decrease Runoff and
Promote Natural Recharge
Lot Coverage – Gravel Driveway
Photos by:Brian Oram (2005)
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RecommendationReach Out, Inform, and Educate
Outside of the Hideout• Local Well Ordinance (Siting, Construction,
and Testing)• Septic and Sludge Management Program• Public Education – school students and new
residents.• Monitoring Select Private Wells within Zone
II and Zone III.• Stormwater Management System that
promote Recharge
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Private Well Ordinance
Ordinance should address:
Well Siting and Location
Construction Standards
Well Material Standards
Well Grouting
Initial Water Testing
Image Source: Master Well Owner, Powerpoint Presentation
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On-lot Disposal System
Program Includes:
Homeowner Education on SystemOperation and Maintenance
Developing a Maintenance and Repair Program – Mandatory SepticTank Pumping
Developing a Septage / Sludge Management Ordinance
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Individual / Community Stormwater Management Systems
Example: Bioretention System for Stormwater Management
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Roamingwood Wellhead Protection Capture Zone
Prepared by:
Mr. Brian Oram, PGMr. Bill Toothill, MS
Wilkes UniversityGeoEnvironmental Sciences and
Engineering Department
http://www.wilkes.eduhttp://www.water-research.net