Airmont Meadows Subdivision - Hydrostudy - Text

Emery c~ Garrett Groundwater, Inc. 56 Main Street • P.O. Box 1578 Meredith, New Hampshire 03253 (603) 279-4425 Fax (603) 279-8717 DETAILED HYDROGEOLOGIC STUDY Conducted in Accordance with Loudoun County Requirements DEVELOPMENT OF INDIVIDUAL WELLS FOR THE AIRMONT MEADOWS SUBDIVISION LOUDOUN COUNTY, VIRGINIA February 2006 ' I. BACKGROUND /SUMMARY Emery & Garrett Groundwater, Inc. (EGGI) has prepared the following Detailed Hydrogeologic Study for the Airmont Meadows Subdivision, in Loudoun County, Virginia (Figure 1 and Plate 1). The intent of this study was to assess whether sufficient on-site groundwater resources are available to meet the potable water supply needs for future houses within the Airmont Meadows Subdivision. The subdivision plans include the development of 24 separate new residential lots using individual bedrock wells. The anticipated maximum total demand for potable water, based on 600 gallons per day (gpd) per household, will be 14,400 gpd or approximately 10 gallons per minute (gpm). The Airmont Meadows Subdivision encompasses approximately 0.13 square miles (82.82 acres), west of Airmont, Virginia (Figure 1). EGGPs groundwater investigation of the project site included the following work tasks: 1. Geologic field mapping to characterize the local bedrock geology. 2. A review of the fracture fabric of the underlying bedrock aquifer using lineaments and bedrock fracture characterization techniques. 3. An assessment of potential availability of groundwater recharge. 4. An assessment of potential contaminant threats/existing land uses that could degrade groundwater quality within 2,000 feet of the project site. 5. Compiling available domestic well information surrounding the subdivision using the Loudoun County Geographic Information System (GIS) database. ~ This is based upon a use of 75 gpd per person, two persons per bedroom, with an average of four bedrooms per residence. A total of 24 lots were used in the calculation for this subdivision.