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LEARWATE <br /> G R O U P, I N C <br /> Environmental Services <br /> Mrs Stella Ruiz June 12, 1998 <br /> 4491 West Durham Ferry Road <br /> Tracy, CA 95376 <br /> Re Ruiz Grocery,4491 West Durham Ferry Road,Tracy,CA <br /> Dear Mrs Ruiz, <br /> Enclosed please End a copy of Clearwater Group, Inc 's (Clearwater's) Quarterly Groundwater Monitonng Report- <br /> Second Quarter 1998 or your site The report presents the results of groundwater monitoring activities performed in <br /> May 1998 Results were generally consistent with those observed previously Please note that all wells were tested <br /> for Fuel Oxygenates (MTBE, ETBE,TBA, DIPS, TAME) as requested by the San Joaquin Public Health Services/ <br /> Environmental Health Department MTBE was detected in samples from wells MW-1 and MW-2 at concentrations <br /> of 7 7 and 810 gg/L,respectively TBA was detected in the sample from well MW-2 at a concentration of 39 gg/L, <br /> however,TBA and the remaining Fuel Oxygenates were not detected in any other wells at compounds exceeding the <br /> reporting limits Copies of this report have been submitted to the regulatory agencies listed below <br /> The Underground Storage Tank Clean-Up Fund has recently provided pre-approval of costs associated with remedial <br /> equipment for the site Clearwater will coordinate equipment delivery and installation within the next month The <br /> remediation system should be ready for start-up and operation shortly thereafter Please do not hesitate to call if you <br /> have any questions or comments regarding the project <br /> Sincerely, <br /> Clearwater Group, Inc. <br /> Brian Gwinn, R G <br /> Project Geologist <br /> enclosure <br /> cc Ms Margaret Lagorio, SJCPHS/EHD f <br /> Ms Elizabeth Thayer, CVRWQCB <br /> 520 Third Street Suite 104 a Oakland,California 94607 m Telephone 510-893-5160 o Fax 510-893-5947 <br />