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RUG-12-1994 12=34 FROM PARK ENVIRONMENTAL CORP. TO 12094640138 P.02 <br /> /fork <br /> En virortme oral <br /> March 16, 1994 <br /> (USA approved August 12, 1994) <br /> 5007J2 <br /> Ms. Linda Turkatte <br /> San Joaquin County Public Health Services <br /> 1601 East Hazelton Avenue <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> RE: Request for Modification <br /> Workplan For Off Site Assessment <br /> of Soil and Groundwater at <br /> USA Petroleum Corporation' s Station#110 <br /> 2132 Mariposa Road <br /> Stockton,California (Site Code#1669) <br /> Dear Ms. Turkatte: <br /> Park Environmental Corporation(Park) submitted a workplan dated February 11, 1993, for the <br /> further assessment of soil and groundwater at the above referenced site location. The workplan <br /> prepared described the drilling and sampling of three off 1perty <br /> il borings, and the completion of <br /> these borings as groundwater monitoring wells. The approlocations for these wells were the <br /> southwest and northeast corners of Mariposa and Farmingtoo and the north side of Farmington <br /> Road approximately 325 feet east of the intersection. <br /> Subsequent to Park's workplan submittal, Geological Aervices, Inc. (GAS) of Stockton, <br /> California performed an environmental assessment for the located at 2088 Mariposa Road, <br /> "Monitoring Well Installation and Quarterly Report", dat Id November, 1993. .As part of this <br /> assessment,GAS installed a groundwater monitoring well ii the vicinity of Park's proposed well <br /> location on the northeast corner of the intersection. We are o the opinion that two monitoring wells <br /> are not needed at this location, and recommend that we relc rate that proposed well to an adjacent <br /> parcel along the south side of Farmington Road, which is own gradient from the USA site and <br /> approximately 350 feet east of the intersection, in front of he strip mall in the adjacent property <br /> parking area(see enclosed Figure). <br /> Also,Park reviewed the GAS documents in an effort to bette r understand what has happened in the <br /> vicinity of the '[ISA site. These GAS reports have documented the presence of TPH and BTEX <br /> compounds in the soils and groundwater beneath and down E radient of the closed Chevron site. A <br /> closer review of the soil and groundwater laboratory analyl ical reports raises the question of the <br /> 4731 Facifrc Street•Suite 7 d3.Rocklin.Ca.95677 TEL:916 784-740 800-753.7407 FAX;716-781,7x46 <br />