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CHEVRON #9-7780 - Z -`- 30 July 1991.' <br /> ground water samples, one i n 'the fall of 1991 and one in fhe spring of 1992, <br /> . and install several borings:tin the formertank pit area. _;Soil samples should <br /> be collected for analysis beginning' at ,about ,.19 'feet and every five. feet ; <br /> thereafter until the ground°water_ table`' is,e.ncountered. A final 'soil` sample <br /> should be. collected just above -the water table, <br /> If the groundimater and soia sample-'results have non-.detectable .or otherwise <br /> acceptable levels of -contamination, we :may then close this" -site. If you have <br /> any questions; please cal..l._�e ai .'(916). 361-5726.. <br /> LIZA TH'.A'. THAYER <br /> Assoc 'ate; Engi neer <br /> JiA <br />