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Nib. <br /> 1` Sa.&�3 North Market Boulevard <br /> Sacramento, CA 95834-1943 <br /> Tel. 916.928.3300 <br /> Fax.916.928.3341 <br /> the(t;group- <br /> Ri=,,,E1VED <br /> January 10, 2000 JAN 112000 <br /> Project 880-040.1A ENS InONMENTAL HEALTH <br /> Ms. Margaret Lagorio <br /> PERMIT/SERVICES <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue <br /> Stockton, California 95202 <br /> Re: Over-Excavation Work Plan <br /> Parkinson's Arco <br /> 3250 West Hammer Lane <br /> Stockton, California <br /> Dear Ms. Lagorio: <br /> On behalf of Mr. Jim Parkinson of Parkinson's Arco, IT Corporation (IT) will be providing <br /> environmental services associated with product line upgrade activities at the above referenced <br /> site. ,An approved contractor will be responsible for all construction activities associated with the <br /> product line replacement, including permitting,product line removal and disposal. The purpose <br /> of this.Work Plan is to notify the San Joaquin County Environmental Health Department <br /> -(SJCPHS/EHD) of the intent of Parkinson's Arco to perform over excavation of soil impacted by <br /> petroleum hydrocarbons and briefly discuss the sampling procedures to be followed during the <br /> site activities. <br /> SITE BACKGROUND <br /> The site is located on West Hammer Lane east of Interstate 5 in Stockton, California. The site is <br /> a privately owned Arco service station that has retailed gasoline fuel for approximately 14 years. <br /> The site currently contains three-10,000-gallon capacity gasoline underground storage tanks <br /> (USTs) and associated product lines and dispensers. <br /> Product line upgrade was begun on January 7, 2000. Mr. Michael Kith with SJCPHS/EHD <br /> .observed soil compliance sampling per the Tri Regional Board Staff Recommendations for <br /> Preliminary Evaluation and Investigation of Underground Tank Sites. Following the removal of <br /> dispenser plumbing soil obviously impacted by petroleum hydrocarbons was discovered below <br /> the western dispenser islands. As directed by Mr. Kith soil samples were collected from beneath <br /> the dispensers and along the product lines at a depth of approximately 3.5 feet below ground <br /> surface (bgs). <br />