HomeMy WebLinkAboutSUB200900028 Review Comments Groundwater Assessment 2009-02-27Tier II Groundwater Assessment
TMP 36 -30A
Application Number: SUB200900028 — Carroll Hoffman - Rural Division
Groundwater Reviewer: J. Rubinstein
Date: 27 February 2009
Description: 1 division — 2 lots
Water Quantity
The Albemarle County Database shows seven wells within half a mile of the
parcel. The wells range from 155 to 365 feet in depth with a median depth
of 205 feet. The well yields range from 5 to 50 gallons per minute with a
median yield of 8 gallons per minute. The median yield for the entire county
is 7 gallons per minute.
Water Quality
As shown on the Virginia Department of Environmental Quality (DEQ) GIS
websitel, the southwest corner of the property is within 2000 feet of a
leaking underground storage tank sites (LUST). Section 500 through 503 of
Albemarle County Code requires that new wells within two thousand feet of
a LUST site be tested for the volatile organic compounds Benzene, Toluene,
Ethylbenzene and Xylenes before a building permit can be issued.
Buffers
According to the county GIS site, and as shown on the plat, parcel 36 -30A
has two required stream buffers on its northern portion. Parcel A has buffer
required around the pond .2 The property is in the Happy Creek watershed.
Site Description
According to the Virginia Department of Mineral Resources 1993 Map, the
parcel is underlain by the metabasalts of the Catoctin Formation (CZc).
1 http: // gisweb. deq .virginia.gov /deqims /viewer.htm ?SERVICE= VA_DEQ
2 http: / /gisweb.albemarle.org/
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 which contains the parcel:
The Blue Ridge East unit overlies "greenstone" and represents the eastern
limb of the Blue Ridge Anticlinorium. The area is characterized by the
presence of a prominent ridge which rises and trends generally northeast
within the otherwise rolling piedmont landscape. Portions of this ridge
are known locally as Green Mountain, Carters Mountain and the
Southwest Mountains. This area is dominated by the Rabun and
Myersville soils and to a lesser extent, the Catoctin. The Rabun soil
series is deep and well drained and like the Myersville soil series is
formed from weathered greenstone. The Catoctin soil series is
considered to be moderately deep and well drained and is also formed
from weathered greenstone.