RECAP GROUNDWATER

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

Groundwater Classifications Groundwater Classification 1: public water supply »Yield > 4,800 g/d »TDS < 1,000 mg/l Class 1A: current public water supply Class 1B: potential public water supply

Groundwater Classifications Groundwater Classification 2: domestic water supply »Yield > 800 g/d but < 4,800 g/d »TDS < 10,000 mg/l Class 2A: current domestic water supply Class 2B: potential domestic water supply (TDS < 1,000) Class 2C: potential domestic water supply (TDS >1000 but < 10,000)

Groundwater Classifications Groundwater Classification 3: Not a potential public or domestic water supply Class 3A: yield < 800g/d Class 3B: TDS > 10,000 mg/l

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

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

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

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

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