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Daniel Mcneer <br /> Contamination Investigation Work <br /> August 27,2004 <br /> Page 2 of 2 <br /> time of sale. During our investigation, we detected low concentrations of gasoline contaminants in <br /> soil and groundwater next to the underground fuel storage tanks at the site. Although we believe <br /> that the contamination is limited to the area immediately adjacent to the tanks, the San Joaquin <br /> County Health Department has requested that we evaltutte conditions further south from the tanks. <br /> The area south of the tanks is required because that is the direction that groundwater flows and may <br /> have carried gasoline contaminants. In order to accomp ish this task, we must install a groundwater <br /> monitoring well on your property at 2430 Kettleman Lane. I have enclosed a map showing the <br /> proposed well location. <br /> Also, I have enclosed two tables that summarizes the concentrations of gasoline contaminants that <br /> have been detected in the soil and monitoring well adjacent to the fuel tanks. These concentrations <br /> are considered to be low, but it is required that the extent to which concentrations may have <br /> migrated.be determined. Samples we test from this monitoring well will likely accomplish this <br /> objective. <br /> As I mentioned to you over the telephone, the work is being reviewed by Harlin Knoll of the San <br /> Joaquin County Environmental Health Department. I am sure that Harlin will be happy to speak <br /> with you. His phone number is (209)468-3442. <br /> In order to minimize disturbances for any residences f the property, we would contact you to <br /> schedule drilling activities during a time that would be convenient. Monitoring well installation <br /> would only take one day and the well would be sampled 48 hours after completion. After that, we <br /> would sample the well up to 4 times during the year. <br /> If you have any questions regarding this project,please contact me at(916) 638-2765. <br /> Sincerely, <br /> DELTA ENVIRONMENT SULTANTS,INC. <br /> ta-mes Brownell <br /> ia Registered Geologist No. 5078 <br /> Enclosures <br /> cc: Jeffrey Baker, Tesoro Environmental Resources Company <br /> Harlin Knoll, San Joaquin County Environmental Health Department. <br /> Chuck Miller,USA Petroleum <br />