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Page 3 of 4 <br /> a It is best to determine if remediation is needed in this portion of the site now,before we initiate <br /> ISCO in the former UST area of the site. It would be more cost-effective to treat both areas of the <br /> site at once,if necessary. <br /> Our primary goal with this investigation is to get a better handle on the distribution of petroleum <br /> hydrocarbons in the subsurface in order to formulate an effective plan for ISCO. We need to know the <br /> aerial extent and depths where ISCO treatment is needed. <br /> Page 4 of 4 <br /> In summary,we propose the following: <br /> • We do not plan to install well MW-15. <br /> • We reiterate our request for installing MW-16 and MW-17. <br /> • We plan to collect soil and groundwater samples from MW-16 and MW-17 for ISCO Bench Scale <br /> Testing. <br /> • We do not plan to install a deep well (screened below 70 feet deep). <br /> • We reiterate our request for advancing CPT borings SB-7 through SB-10. <br /> Sorry for the long email message,but we wanted to provide enough detail in our explanation to let you <br /> know why we believe this work is warranted and prudent. Please let me know if our proposed work is <br /> acceptable. If after considering our explanation above you and Nuel still think our proposed work is <br /> not necessary, then we would like to meet with you to discuss this further. <br /> Regards, <br /> Ann <br /> Ann Rosecrance <br /> Conestoga-Rovers 8r Associates (CRA) <br /> 19449 Riverside Drive <br /> Sonoma, CA 95476 <br /> Phone: 707-933-2371 <br /> Fax: 707-935-6649 <br /> Cell: 510-385-0037 <br /> Email: arosecrance@CRAworld.com <br /> www.CRAworld.com <br /> Think before you print NA <br /> Perform every task the safe way,the right way,every time! <br /> 4/12/2010 <br />