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,h <br /> • i <br /> CONESTOGA-ROVERS <br /> &ASSOCIATES <br /> March 8,2010 -3- Reference No. 060223 <br /> 2. Installing conductor casings within the upper 50 feet below ground surface at the four <br /> deep well locations to prevent possible cross-contamination during drilling from <br /> shallow to deep groundwater zones. <br /> 3. Install one additional shallow well southwest of trench 3. The attached Figure 1 shows <br /> the location for this additional well. <br /> If you have any questions regarding the contacts of this letter,please can Jeff Gaarder at <br /> (707) 933-2362. <br /> Yours truly, <br /> CO�NESTOGA-ROVERS&ASSOCIATES <br /> - , M a-t"'a <br /> Jeff Gaarder <br /> JG/fb/2 <br /> Enclosures: <br /> Figure 1. Site Map <br /> cc: Mr.Joe Lentini,Shell Oil Products US <br /> Mr. Mike Infurna,San Joaquin County Environmental Health Department,Stockton <br /> Ms. Eileen Nottoh,Allen Matkins Leck Gamble&Mallory LLP,San Francisco <br /> Mr. David Corliss,Golden State Developers,Walnut Creek <br /> Worldwide Engineering, Environmental, Construction, and IT Services <br />