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--4ai' y'! orpopation <br /> North Market Boulevard <br /> Sacramento, CA 95834-19.12 <br /> Tel. 916.928.3300 <br /> theFax. 916.928.3341 <br /> (4r <br /> '*0up- A lfember of The IT Group <br /> DEC 1 7 2001 December 12, 2001 <br /> Project 880-040.1A <br /> ENV1KjNMLN rA,. s ,EALTH <br /> Mr. Sam Savig PERM VUSERVICES <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue <br /> Stockton, California 95202 <br /> Re: Work Plan for 5-Day Dual Phase Extraction Event,Installation of Two Down <br /> Gradient Wells,and One Deep Soil Boring <br /> Parkinson's Hammer 1-5 Arco <br /> 3250 West Hammer Lane <br /> Stockton, California <br /> Dear Mr. Savig: <br /> On behalf of Mr.Jim Parkinson of Parkinson's Hammer 1-5 Arco, IT Corporation (TT) presents <br /> this Work Plan Report for performing a 5-day dual phase extraction.(DPE) remediation event at <br /> the site referenced above. The purpose of this event is to reduce the concentrations of methyl <br /> tertiary butyl ether (1VItBE) in soil and groundwater beneath the site and to evaluate the <br /> feasibility of implementing groundwater extraction, vapor extraction, or DPE as a remedial <br /> solution. In addition,.this work plan details the installation of two down gradient monitoring <br /> wells and one deep soil boring. This report was prepared in response to a letter from the San <br /> Joaquin County Environmental Health Division (SJCEHD) dated October 31, 2001 <br /> (Attachment A) requesting a work plan to define the vertical and lateral extent of soil and <br /> groundwater contamination and-determine aninterim remedial alternative to control the off-site <br /> migration of MtBE. <br /> Site Background <br /> f Interstate 5 in Stockton California(Figure 1 <br /> The site is located on West Hammer Lane east o ( g ) <br /> The site is a privately owned Arco-branded service station that has retailed gasoline fuel for <br /> approximately 14 years. The.site currently contains three 12,000-gallon capacity gasoline <br /> underground storage tanks (USTs) and associated product lines and dispensers. Diesel fuel has <br /> never been dispensed at the site. <br /> \\SACRFP 1\COMMON\sacDP\2001\PRJ\PJ8\8800401 A.1 ac.doc <br /> "12112/01 <br /> I <br />