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11/26/1997 23:22 5102772361 TOSCO ENVIRONMENTAL PAGE 02 <br /> ration Marketing company <br /> two Cow Canon <br /> Place.Sm.400 <br /> ' San Ramon, 94583 <br /> Ir Telephone:516277-20-2T7-2 305 <br /> Fge51mme.510.2772361 <br /> Ettvlronmantal complhnea <br /> TO$C 0 Department <br /> November 26, 1997 <br /> Ms. Mary Maeys <br /> San Joaquin Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton,CA 95202 <br /> Unocal Station#6981 <br /> 4707 Pacific Avenue <br /> Stockton,California <br /> Dear Ms.Maeys: <br /> Tosco Marketing Company(Tosco)was informed today that groundwater samples for the 4'Quarter monitoring and <br /> sampling event were analyzed by the EPA 8260 method,as per your request. Unfortunately,the field technician for <br /> MPDS misinterpreted your request on October 15, 1997,and completed the cbain of custody for Mt9E only, rather <br /> than indicating the analyses were to be performed for oxygenates. Tosco had also verbally instructed MPDS to analyze <br /> all groundwater samples for oxygenates by the 8260 method. We apologize for any inconvenience and any <br /> miscommunication between the San Joaquin County,MPDS and Tosco. <br /> ` We have contacted our primary consultant,GeoStrategies,and requested that they contact your office to schedule the <br /> resampling of the groundwater monitoring wells for analysis of the oxygenates. Once the results are available,they will <br /> be incorporated in the 4'Quarter monitor and sampling report as an addendum. <br /> !f You have any questions,please feet free to contact me at(510)277-2311 <br /> �Sincerely, <br /> Edward C.Ralston <br /> Project Manager <br /> CC: James Munch,SWRC13 <br /> Tom Skok,Tosco <br /> Greg Gurss,GSl <br /> Erin Gamer,PEG <br /> Ron Schwab,Unocal <br />