Barclay Ridge Section III - Hydrostudy - Appendix A: GAR-9

HYDROGEOLOGIC LOG FOR GAR-9 BARCLAY RIDGE -- SECTION III LOUDOUN COUNTY, VIRGINIA Project: Barclay Ridge -- Section !!I Casing Depth: 66' Casing Stickup: 1' Driller: Singhas & Michael Corp. Casing Thickness:.188 " Date Drilled: //10-1/12/01 Depth Drilled:500' Drill Rig Type: Air Rotary Depth to bedrock: 10' Well Diameter: 6" Air-lift Yield: 8 gpm Latitude: N38°59'38" Longitude: W 77°35'58" Grout Type (Depth): Bentonite (60) Virginia Planar Grid Coordinates.: E 2,255,983 N484,627 Loudoun County Permit #: 177/ FW 00 Depth AIR-LIF Graphic (feet) YIELD * Log Descriptive Log (gPm) 0 20 Casing 0' - 10': Saprolite. ao ~ 10'-240': Reddish-brown, fine-grained, poorly bedded sandstone interbedded with agrey-green 60 ~~ medium- grained, moderately sorted sandstone. 80 100 120 140 160 180 200 zzo 5 210': WATER-BEARING ZONE: 5 gpm. 2ao .. 240'-380': Overall reddish-grey, poorly sorted conglomerate clasts of greenstone sandstone 260 , , , 280 quartzite, and quartz. 300 320 LT~ 340 s~P, D.F ~ 360 ~ ,~ 380 .~ O~ ~~ 380'-400': Reddish-brown sandstone. aoo 400'-420': Conglomerate. azo a4o ~'~' ~ ~~~ C' 420'-440': Reddish-brown sandstone. ' ' 460 8 440 -500 : Conglomerate. ~ ~~Ct~ 1 ~E Ph.D. 460': WATER-BEARING ZONE: 3 m aso gp . E., 500 500': End of drilling. Cs * Yield determined during drilling of 6" test well. O ~w LEGEND ~ssio~ SAPROLITE: Residual products of in-situ weathering of bedrock. CONGLOMERATE: Overall dark reddish-grey, massive and poorly sorted. Matrix is dark reddish to grey, fine-to medium-grained sand; clasts consist of greenstone, sandstone, quartzite and quartz. SANDSTONE: Dark reddish-brown, poorly to moderately laminar bedded, calcareous, mostly fine- to medium-grained sandstone. Interbedded with a grey, medium-grained, poorly bedded sandstone. ® WATER-BEARING ZONE: Where yield of well increased. GAR logs.xls;GAR-9 Page 1 Emery and Garrett Groundwater, Inc.