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ENV..': <br /> A M E R I C A <br /> Mr. Duane White <br /> California Department of Toxic Substances Control <br /> September 24, 2004 <br /> Page 6 of 6 <br /> Zone Well <br /> A MW21 This is an offsite downgradient well and COC concentrations have been NDs, near <br /> the RAOs, and/or less than the RAOs for more than four consecutive rounds. <br /> B MW1D This is a cross-gradient well and COC concentrations have been NDs for more <br /> than four consecutive rounds. <br /> B MW5 This is an in-plume well located between MW9R and MW6R, which are both <br /> included in the proposed revised groundwater monitoring program. MW5 does not <br /> provide additional information for remediation progress evaluation. <br /> B MW17 This is a cross-gradient well and COC concentrations have been NDs, near the <br /> RAOs, and/or less than the RAOs for more than four consecutive rounds. <br /> B MW22 This is a cross-gradient well and COC concentrations have been NDs, near the <br /> RAOs, and/or less than the RAOs for more than four consecutive rounds. <br /> C MW14 This is an offsite up-or cross-gradient well and COC concentrations have been <br /> NDs, near the RAOs, and/or less than the RAOs for more than four consecutive <br /> rounds. <br /> C MW15 This is an offsite up-or cross-gradient well and COC concentrations have been <br /> NDs, near the RAOs, and/or less than the RAOs for more than four consecutive <br /> rounds. <br /> C MW16 This is an offsite cross-gradient well and COC concentrations have been NDs, <br /> near the RAOs, and/or less than the RAOs for more than four consecutive rounds. <br /> C MW25 This is an offsite downgradient well and COC concentrations have been NDs, near <br /> the RAOs, and/or less than the RAOs for more than four consecutive rounds. <br /> These wells will be decommissioned in accordance with San Joaquin County and State <br /> requirements after receiving approval from the DTSC. <br /> Please call us at 451-989-9933 or Ms. Betsy Brunswick of PG&E at 415-973-1642 if you <br /> need additional information or have questions. <br /> Sincerely, <br /> ENV America Incorporated <br /> Veen Chee Foong, PE Voytek Bajsarowicz <br /> Senior Project Manager Principal <br /> cc: Ms. Betsy Brunswick, PG&E <br /> Mr. Darrell Klingman, PG&E <br /> Mr. Gerald Djuth, CV-RWQCB <br /> Mr. Jeff Wong, San Joaquin County EHD <br /> CADocuments and Settings\mlavier\Local Settings\Temporary Internet Files\OLK86\DTSC response Itr Sep2004_revised.doc <br />