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'r <br /> PHASE ONE <br /> io-v <br /> F: <br /> ENVIRONMENTAL <br /> November 18, 1996 <br /> Mr. John Urrutia <br /> Bank of Stockton <br /> Post Office Box 1110 <br /> Stockton, Ca. 95201 <br /> RE: ADDENDUM TO WORKPLAN FOR VADOSE ZONE SITE <br /> CHARACTERIZATION { <br /> FORMER UNION TANK SITE- CUTTER LUMBER <br /> 3430 & 3422 S. EL DORADO, STOCKTON <br /> Dear Mr. Urrutia: <br /> On October 8, 1996, Phase One Environmental Inc. submitted a Work Plan proposing eight <br /> soil boring designed to help determine the horizontal and vertical extent of gasoline and <br /> diesel fuel contamination in the vadose zone in the vicinity of the former gasoline UST , <br /> which is believed to .have been operated by"Union Oil Company. The work plan also <br /> proposed installing a temporary plug in the idle domestic water well and checking'the entry <br /> rate of water in order to check on the casing integrity of the well. Based on additional <br /> consideration, and discussion with service companies and regulators, we now propose to <br /> modify the previously prepared Work Plan. The addendum proposed to abandon the <br /> domestic water well without additional testing: <br /> The attached addendum is intended to`replace Section 4.0 of the original Work Plan. <br /> If you have any questions or need additional information, please contact me. Thank you for <br /> u <br /> this opportunity to serve your environmental needs. <br /> Sincerely, <br /> Pha One Environment C. <br /> Stephen M. Lankford, , REA <br /> President <br /> cc: Harlan Knoll, San Joaquin Co:; PHS/EHD <br /> Wendy Cohen, CVRWQCB <br /> I <br /> I <br /> q <br /> 1 <br /> i <br />