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HYDROGEOLOGIC LOG FOR PKL-13 <br /> BISHOP'S GATE SUBDIVISION <br /> LOUDOUN COUNTY, VIRGINIA <br />Project: Bishop's Gate Subdivision Casing Depth: 8/' Casing Stickup: Z' Casing Thickness:. /88" <br />Driller: Siitghas and Michael Corp. Depth Drilled: 260' <br />Date Drilled: / //3/04 Depth to bedrock: SS' <br />Drill Rig Type: Schrant »: Air Rotary Static Water Level: 48.05' <br />Well Diameter: 6" Airlift Yield: 20 gpm <br />Latitude: 39°9'48' Longitude: 77°42'53" Grout Type (Depth): Bensea! (77) <br /> Loudoun County Permit #: 740/48680001 <br />Depth Air-Lift Graphic <br />(feet) Yield* Log Descriptive Log <br /> ( m) <br />0 Casin 0' - 55': Saprolite. <br />10 <br />20 <br />30 <br />40 <br />50 <br />60 ~' <br />.~ ~; 55' - 100': Dark greenish-gray, fine-grained, moderately foliated greenstone. <br />70 • <br />`~ <br />• <br />80 ~ <br />90 <br />100 <br />110 100' - 240': Dark gray, medium- to coarse-grained, moderately foliated biotite granite gneiss. <br />120 <br />130 5 130': Water-bearing zone: 5 gpm. <br />140 <br />150 <br />160 <br />170 <br />180 <br />190 <br />200 <br />210 <br />220 <br />230 20 230': Water-bearing zone: 15 gpm. <br />240 <br />250 240' - 260': Greenstone. <br />260 <br /> <br />270 <br />Cuttings of bedrock collected at 10-foot intervals and at changes in lithology. * Yield determined during drilling of 6" test well. <br /> LEGEND** <br />SAPROLITE: Residual products of in-situ weathering of bedrock. <br />® BIOT[TE GRANITE GNEISS: Dark-gray, medium-grained to course-grained, moderately foliated biotite <br /> granite gneiss, commonly with smoky blue coarse-grained quartz. Occasionally grades to a well foliated <br /> micaceous schist. <br />GREENSTONE: Dark greenish-gray, fine-grained, moderately foliated greenstone. <br />~~ WATER-BEARING ZONE: Where yield of well increased. <br />** Minerals describin rock t es are listed in order of increasin abundance. <br />PKL Bedrock well Iogs.xls;PKL-l3 Page 1 Emery & Garrett Groundwater, Inc. <br />