SITE INFORMATION AND CORRESPONDENCE 1995-2004

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James L. Tjosvold, P.E. April 24, 1996 Page 3 Chapters 4 and 5. Revised Soil OUFS Chapters 4 and 5 will be submitted to DTSC and the RWQCB for advance comment in May, 1996. The draft Phase IV groundwater investigation work plan to install six additional groundwater monitoring wells at the site was delivered to DTSC and the RWQCB on January 8, 1996. A conference call to discuss this draft work plan took place on January 22, 1996 and the final work plan was submitted to DTSC and the RWQCB on February 6, 1996. Phase IV work to install the new monitoring wells began on March 18, 1996 and ended on April 19, 1996. A draft Phase IV Technical Memorandum describing the results of Phase IV work will be submitted to DTSC and the RWQCB in June, 1996. "The Quarterly Monitoring Report, PG&E Stockton Former MGP Site, Fourth Quarter, 1995", containing the results of groundwater monitoring conducted in December, 1994 was submitted to DTSC and the RWQCB on January 31, 1996. The next quarterly groundwater monitoring occurred on March 4 and 5, 1996. The results of this monitoring will be submitted to DTSC and the RWQCB by April 30, 1996 in the"Quarterly Monitoring Report, PG&E Stockton Former MGP Site, First Quarter, 1996". III. Schedule Changes: An updated project schedule incorporating conducting a treatability study prior to preparing the final Soil OUFS was submitted to DTSC and the RWQCB on March 13, 1996. IV. Activities Planned for Next Ouarter: The final Soil OUFS is scheduled to be delivered to DTSC and the RWQCB in June, 1996. This final Soil OUFS will incorporate the criteria used to define the soil source areas, the results of fate and transport modeling of diesel, PNAs and BTEX in the non- source soils, the results of the treatability study, and DTSC's and RWQCB's comments on the draft Soil OUFS. Revised Chapters 4 and 5 of the Soil OUFS which discuss the criteria used to define the source areas and the results of fate and transport modeling of ` diesel, PNAs and BTEX in the soil will be submitted to DTSC and the RWQCB for their review prior to submittal of the final Soil OUFS. The results of the treatability study to evaluate the effectiveness of the proposed soil remedial action will be available in early May, 1996 and will be discussed with the agencies at that time.