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�) HECENEff 0 Shaw Environmental, Inc <br /> j 1326 !North Market Boulevard <br /> Sacramento, CA 95834-1912 <br /> NIAR 9, 5 2nnii 916 928 3300 <br /> Fax 916 565 4356 <br /> ENVInONMEN1 HEALTFl ax (Killers Only) 916 928 0415 <br /> -n a ® Shaw Environmental, Inc. PERMIT/SERVICES <br />' March 23, 2005 3A lo, <br /> Project No 880040 lA 02010000 Iyar <br /> Ms Vicki McCartney <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue <br /> Stockton, California 95202 <br /> Re First Quarter 2005 Groundwater Monitoring Report, Parkinson's Hammer <br /> I-5 Arco, 3250 West Hammer Lane Stockton, Califorma <br /> Dear Ms McCartney <br /> On behalf of Parkinson's Hammer I-5 Arco, Shaw Environmental, Inc (Shaw) presents <br /> the results of the First Quarter 2005 groundwater monitoring event for the above <br /> referenced site <br /> SITE BACKGROUND <br /> ' The site is located at 3250 West Hammer Lane, in Stockton, San Joaquin County, <br /> California The site is a privately owned Arco-branded service station that has retailed <br /> ' gasoline fuel for approximately 15 years It contains three 12,000-gallon capacity <br /> gasoline underground storage tanks (USTs) and associated product lines and dispensers <br /> Diesel fuel has never been dispensed at the site <br /> On January 7, 2000, the station began product line upgrades After the removal of <br /> ' dispenser plumbing, petroleum hydrocarbons impacted soil was discovered below the <br /> western dispenser islands Soil samples were collected from beneath the dispensers and <br /> ' along the product lines at a depth of approximately 3 5 feet below ground surface (bgs) <br /> Remedial activities conducted in January 2000, included removal of approximately <br /> ' 262 tons of impacted soil from beneath and near the dispenser and product lines <br /> Excavation areas were selected based on the January 7, 2000, sampling results <br /> Excavation was restricted laterally by concrete canopy footings and asphalt surfacing <br /> ' A Shaw Group Company <br /> N IsacDP120051Prj188018800401A 5aa doc <br /> N <br />