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IT Cotpopation <br /> 1.326 North Alarket Boulevard <br /> Saeramento, CA 95834-1912 <br /> Tel 916 928 3300 <br /> 4Vhe t -( tax 916 928 3341 <br /> r*oup A Mernber of The IT Croup <br /> December 4, 2001 <br /> Project 880-040 IA <br /> Mr Sam Savig <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue <br /> Stockton, California 95202 <br /> Re Fourth Quarter 2001 Groundwater Monitoring Report <br /> Parkinson's Hammer I-5 Arco <br /> 3250 West Hammer Lane <br /> Stockton, California <br /> Dear Mr Savig <br /> On behalf of Mr Jim Parkinson of Parkinson's Hammer I-5 Arco, IT Corporation (IT) <br /> presents the results of the fourth quarter 2001 groundwater monitoring event at the site <br /> referenced above <br /> SITE BACKGROUND <br /> The site is located on West Hammer Lane east of Interstate 5 in Stockton, California <br /> The site is a privately owned Arco-branded service station that has retailed gasoline fuel <br /> for approximately 14 years The site currently 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 /> Product line upgrades began on January 7, 2000 After the removal of dispenser <br /> plumbing, soil obviously 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 /> areas were selected based upon the results of January 7, 2000 sampling Excavation was <br /> restricted laterally by concrete canopy footings and asphalt surfacing Maximum <br /> excavation depth was 10 feet bgs due to close proximity of groundwater Results of soil <br /> IT CORPORATION <br /> SAC 1115ACRFPIICOMMON1sacDP120011PR11P]$18800401A lab doc-Mit 1 <br /> (01070000) <br />