RECAP

1

• RECAP
• GROUNDWATER

2
Groundwater

• Current Use
• DOTD Well Survey (1 mi radius/12 mo)
• 500 foot walking receptor survey
• Potential Use
• sustainable yield
• total dissolved solids

3
Groundwater Classifications

• Groundwater Classification 1 public water supply
• Yield gt 4,800 g/d
• TDS lt 1,000 mg/l
• Class 1A current public water supply
• Class 1B potential public water supply

4
Groundwater Classifications

• Groundwater Classification 2 domestic water
  supply
• Yield gt 800 g/d but lt 4,800 g/d
• TDS lt 10,000 mg/l
• Class 2A current domestic water supply
• Class 2B potential domestic water supply (TDS lt
  1,000)
• Class 2C potential domestic water supply (TDS
  gt1000 but lt 10,000)

5
Groundwater Classifications

• Groundwater Classification 3
• Not a potential public or domestic water supply
• Class 3A yield lt 800g/d
• Class 3B TDS gt 10,000 mg/l

6
Groundwater POC and POE

• Point of Compliance
• point where RECAP standard must be met
• Point of Exposure
• point of actual or potential contact between a
  receptor and a COC

7
Groundwater 1 POC and POE

• Point of Exposure
• throughout the aquifer to be protected or
  restored
• Point of Compliance
• sampling location placed as near to the
  source as feasible without causing an
  adverse impact

8
Groundwater2 POC and POE

• Point of Exposure
• on-site exposure point, or
• property boundary, or
• nearest downgradient point off-site
• Point of Compliance
• sampling location placed as near to the source as
  feasible without causing an adverse impact

9
Groundwater 3 POC and POE

• Point of Exposure
• point of discharge to a surface water body within
  the aquifer
• Point of Compliance
• sampling location placed as near to the source as
  feasible without causing an adverse impact

10
Point of Compliance (POC) and Point of Exposure
(POE)
GW-1
Site Boundaries
POC
POE THROUGOUT AQUIFER
Flow Direction
GW-2
Road
POC
POC
POE
POE
Flow Direction
GW-3
POC
POE
Water Body
Flow Direction