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Harding Lawson Associates <br /> decanted into o 40-milliliter (ml) volatile organic analysis (VOA) <br /> E vials. V0A's were stored in cooled insulated container and <br /> delivered under chain-ox-custody to 'he chemical testing labora- <br /> tory. Excess water generated during well development was stored <br /> I ; <br /> in 55-gallon drums pending proper disposal. Well completion <br /> { diagrams are in Appendix B. <br /> i <br /> The screened intervals{ of wells varied from 5 to 20 feet in <br /> - length. Ground water flows north-northeast in a shallow sandy <br /> : j <br /> stratum immediately beneath the site, with a gradient of 0.004 <br /> 7 <br /> feet.per foot. A review of preliminary data suggests that the <br /> { <br /> tank backfill is in hydraulic'-connection with this shallow sandy <br /> r Yj stratum. The permeable zone understudy is not currently used as <br /> a. source of potable water or for irrigation or commercial <br /> purposes. _ <br /> The closest surface water feature is the <br /> Lj Tom Paine slough, <br /> approximately three miles to the northeast, Available data indi- <br /> cate that neither this slough or any other surface feature is <br /> hydraulically interacting with the shallow sandy stratum. <br /> i <br /> 5 <br /> S <br /> I <br /> 3 <br /> } ... - f <br /> � i <br /> �" 6 <br />