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HomeMy WebLinkAboutSUB200800272 Review Comments Groundwater Assessment 2008-11-10Tier II Groundwater Assessment TMP 47 - 47F Application: SUB200800272 Michael O Barrett - (2 Lot) -Final Groundwater Reviewer: J. Rubinstein Date: 10 November 2008 Description: 1 division — 2 lots Water Quantity The Albemarle County Database shows 18 wells within half a mile of the lot. The wells range from 130 to 505 feet in depth with a median depth of 300 feet. The well yields range from zero to 50 gallons per minute with a median yield of 3 gallons per minute. The median yield for the county is 7 gallons per minute. Water Quality As shown on the Virginia Department of Environmental Quality (DEQ) GIS website, there are no leaking underground storage tank sites (LUST) within two thousand feet of the parcel.' Buffers Most of Parcel 4A2 and portion of 4A1 are in the Preddy Creek watershed. The remaining portion of 4A1 is in the watershed for the Flannigan Branch of the North Fork of the Rivanna. Neither watershed contributes to a public water supply. According to the county GIS site, there is no required buffer on the parcel . 2 Site Description According to the Virginia Department of Mineral Resources 1993 Map, the residue and most of parcel 4A are underlain by hornblende and metagabbro ' http: / /gisweb.deq.virginia.gov /deqims /viewer.htm ?SERVICE= VA_DEQ 2 http: / /gisweb.albemarle.org/ (Czmd). The northern tip of parcel 4A is underlain by metasandstones of the Lynchburg Group (Zch). In a groundwater assessment done for the Albemarle County, ENSAT Corporation divided the county into `hydrologic units'. Below is ENSAT's description of the unit in which lies the property: The Lynchburg unit is characterized by a relatively narrow band that trends in a northeast direction and includes a relatively long segment of the Mechums River valley. Soils within this unit are dominated by the Hazel and to a lesser extent by the Elioak and Glenelg soils. The Hazel soil series are moderately deep and well drained and are formed in the weathered products of metagreywacke sandstone and mica schist. Hazel soils lie on the uplands and their slopes range from 7- 45 %. The Elioak soil series are deep and well drained and are formed in the products of weathered micaeous metamorphic rock. Slopes of the Elioak range from 2 -25 %. The Glenelg soils are also deep and well drained and are formed in the weathered products of quartz mica schist. Slopes of the Glenelg range from 2 -45 %.