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California Regional Water Quality Control Board
<br />Central Valley Region
<br />Robert Schneider, Chair
<br />Winston H. Hickox Gray Davis
<br />Secretaryfor Sacramento Main Office Governor
<br />Environmental Internet Address: http://www.swrcb.ca.gov/-rwgcb5 MU57JEDD
<br />Protection 3443 Routier Road, Suite A, Sacramento, California 95827-3003
<br />Phone (916) 255-3000 • FAX (916) 255-3015 FEB 2 8 2002
<br />ENVIRONMEW HEALTH
<br />PERM T/SERViOES
<br />27 February 2002
<br />Mr. Jim Lancaster
<br />Woolsey Oil, Inc.
<br />166 Frank West Circle
<br />Stockton, CA 95206
<br />ANNUAL GROUNDWATER MONITORING AND SAMPLING REPORT 2001, MRP NO. 5-01-841,
<br />WOOLSEY OIL, INC., 930 VICTOR ROAD, LODI, SAN JOAQUIN COUNTY
<br />We have reviewed the Annual Groundwater Monitoring and Sampling Report 2001, Monitoring and
<br />Reporting (MRP) No. 5-01-841, Woolsey Oil, Inc., 930 Victor Road, Lodi, San Joaquin County, CA
<br />(Report), received 4 February 2002, submitted on your behalf by Ground Zero Analysis, Inc (GZA). The
<br />Report describes four quarterly groundwater sampling events during 2001 of shallow monitoring wells
<br />in the aquifer A -zone, and one round of groundwater sampling during January 2002 for MW -1D, which
<br />is screened in the B -zone aquifer. During 2001, depth to groundwater across the site varied from 48 to
<br />52 feet below ground surface, with a slight (0.012 ft/ft) upward gradient from the B -zone to the A -zone.
<br />Groundwater flow direction varied from south -southeasterly to south -southwesterly, with a gradient
<br />variation from 0.003-0.035 feet/feet.
<br />Monitoring well MW -8 was not sampled during 2001, due to the presence of floating free product.
<br />Approximately 61 gallons of floating free product mixed with groundwater was removed from
<br />monitoring well MW -8 during 2001. D7 monitoring well MW -1 was abandoned on 10 January 2001.
<br />MW -2 and MW -5 were dry during the 4 quarter 2001.
<br />The Report states that Total Petroleum Hydrocarbons, as diesel (TPH-d), as gasoline (TPH-g), benzene-
<br />toluene-ethylbenzene-xylenes (BTEX), volatile organic compounds (VOCs, including oxygenates), and
<br />dissolved lead were detected in the A -zone. Maximum groundwater concentrations were:
<br />• 39,000 µg/L for TPH-g (MW -9, 4a' quarter 2001),
<br />• 2,900 µg/L for TPH-d (MW -6, 1" quarter 2001),
<br />• 4,600-1,300-920-3,200 µg/L for B -T -E -X (MW -9, 4`h quarter 2001), and
<br />• 2,900 µg/L for Methyl tert-Butyl Ether (MtBE) in MW -7 (2°d quarter 2001).
<br />a VOC (1,2-dichloroethane) was detected for the first time, at 3.3 ug/L (MW -6, 4th quarter 2001).
<br />During January 2001, analyses from soil boring DB -1 revealed TPH-d, TPH-g, BTEX, and oxygenates
<br />in soil and groundwater in the B -zone aquifer. Subsequent non -detect results of groundwater analysis
<br />for deep monitoring well MW -1D (January 2002), located near DB -1, were presented as proof that the
<br />California Environmental Protection Agency
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