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' SEP 0 1 2004 <br /> Shaw Environmental&Infrastructure, Inc <br /> ENViRuMV1t,, <br /> PERW�'`' � 1€ S 1326 North Market Boulevard <br /> Sacramento, California 95834 <br /> 9169283300 <br /> FAX 91 6 565 4356 <br /> ShaW The Shaw Group Inc"" <br /> August 30, 2004 <br /> Project No 880-040 lA 02010000 <br /> Ms Vicki McCartney 91 <br /> San Joaquin Count Public Health Services <br /> q Y <br /> Environmental Health Division ¢'`it ��s <br /> 304 East Weber Avenue <br />' Stockton, California 95202 <br /> Re Third Quarter 2004 Groundwater Monitoring Report, Parkinson's Hammer <br /> I-5 Arco, 3250 West Hammer Lane Stockton, California <br /> Dear Ms McCartney <br /> On behalf of Mr Jim Parkinson, Shaw Environmental, Inc (Shaw) presents the results <br /> of the third quarter 2004 groundwater monitoring event for Parkinson's Hammer <br /> I-5 Arco <br />' SITE BACKGROUND <br /> The site is located at 3250 West Hammer Lane, east of Interstate 5 in Stockton, <br />' California The site is a privately owned Arco-branded service station that has retailed <br /> gasoline fuel for approximately 14 years The site currently includes three 12,000-gallon <br /> capacity gasoline underground storage tanks (USTs) and associated product lines and <br /> dispensers 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, soil impacted by petroleum hydrocarbons 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 on January 26, 2000, included removal of approximately <br /> 262 tons of impacted soil in the area below dispenser and product lines Excavation <br />' N\sac DP120041Pri188018800401A 4ac doc <br />