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HYDROGEOLOGIC LOG FOR GAR-18 <br />BARCLAY RIDGE -- SECTION III <br />LOUDOUN COUNTY, VIRGINIA <br />Project: Barclay Ridge -- Section 111 Casing Depth: 68' Casing Stickup: I' <br />Driller: Singhas & Michael Corp. Casing Thickness:.188 " <br />Date Drilled: 1/9-1/10/01 Depth Drilled:340' <br />Drill Rig Type: Air Rotary Depth to bedrock: 20' <br />Well Diameter: 6" Air-lift Yield: 10 gpm <br />Latitude: N38°59'44" Longitude: W 77°36'03" Grout Type (Depth): Bentonite (60) <br />Virginia Planar Grid Coordinates: E 2,255,552 N Loudoun County Permit #: 1772 FW 00 <br />Depth AIR-LIF Graphic <br />(feet) YIELD * Log Descriptive Log <br />(gpm) <br />0 <br />zo <br />Casing <br />O' - 20': Saprolite. <br /> 20'-80': Overall reddish-grey <br />poorly sorted conglomerate <br />clasts of greenstone <br />sandstone <br />ao , <br />, <br />, <br />, <br />6o quartzite, and quartz. <br />so <br />too ~: 80'-140': Reddish-brown, fine-grained, poorly bedded sandstone. <br />tzo <br />a ~ <br />t <br />o 140'-220': Conglomerate. <br />160 <br />t8o 2 180': WATER-BEARING ZONE: 2 gpm <br /> <br />zoo . <br /> <br />220 <br />zao <br />•: ~,r~ <br />220'-320': Reddish-brown sandstone. -41 OF <br />~ <br />260 ~ <br />~ , <br /> <br />280 ~ <br />~ <br />~j <br />, <br />300 <br />320 <br />to N <br />~ ~~~ ~° <br />315': WATER-BEARING ZONE: 8 gpm. n1`f 1~`. <br />~ <br />Qn <br />D <br />Sao 320'-340': Con <br />lomerate <br />340': Final de <br />th <br />( <br />~~ <br />' <br />' <br /> g <br />. <br />. <br />, <br />~ <br />p <br />* Yield determined during drilling of 6" test well. ~ <br />LEGEND ~w° <br />Q~~Q~ <br />SAPROLITE: Residual products of in-situ weathering of bedrock. <br />CONGLOMERATE: Overall dark-reddish grey, massive and poorly sorted. Matrix is dark <br />reddish to grey, fine-to medium-grained sand; clasts consist of greenstone, sandstone, quartzite <br />and quartz. <br />SANDSTONE: Dark reddish-brown, poorly to moderately laminar bedded, calcareous, mostly fine-to <br />medium- grained sandstone. Interbedded with a grey, medium-grained, poorly bedded sandstone. <br />® WATER-BEARING ZONE: Where yield of well increased. <br />GAR Iogs.xls;GAR-I8 Page 1 Emery and Garrett Groundwater, Inc. <br />