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1 <br /> Harding Lawson Aesoclalos <br /> II. BACKGROUND <br /> A. Site Histor <br /> LO-.cation <br /> ' The 7-Bleven facility at the corner of Grant Line <br /> r <br /> and Buthmann Avenue Consists of Road <br /> j. i Zine station. a convenience store gaso- <br /> The facilit and a <br /> Y was constructed <br /> in October <br /> r- a vacant site. Plate 1, the Site plan, ► 1978, on <br /> layoutillustrates <br /> {underground the facility <br /> tanks and associated ` <br /> the neighborhood; and ne piping) ; its location in <br /> arby underground i <br /> . Overhead utilities uti3ities. There are no <br /> in the ° <br /> immediate vicinity of the site. <br /> 2. Tank <br /> Test,n <br /> On March 27, 198.6 f <br /> tanks , precision testing of under <br /> and product lines was conducted .b ground } <br /> The results. Y Lawrence Tank Testing. <br /> Of these tests were . <br /> Inconclusive; r <br /> decided to. therefore, it was <br /> is all product <br /> piping from the tanks and <br /> retest individual co <br /> m later ' <br /> Ponents. Because inventor <br /> records indicated no Y reconciliation <br /> loss of gasoline <br /> priority ranking the store was not t <br /> g by the <br /> given a <br /> The tanks and lines - - - - - - - <br /> ti ,t i <br /> " were exposed <br /> retested on October 27 , isolated, and <br /> ` , 1986. <br /> The results showed that the <br /> unl <br /> �.. 10,000-gallon tank for <br /> eaded gasoline (Plate .. 7) <br /> a rate of gallons On October was leaking at <br /> .09` <br /> per hour. <br /> was em 30, 1°��, this tank <br /> ptied and .taken permanently <br /> the out of service , <br /> 'total quantity . .10 estimate of <br /> Of <br /> gasoline rel'ras 'ed was <br /> filed an Underground available. <br /> Southland <br /> }. Storage Tank Unauthorized <br /> � Release Report on <br /> L <br /> 2 <br />