SITE INFORMATION AND CORRESPONDENCE 1991-1992

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Mr. Val F. Siebal Page Three February 5, 1992 event of a major fault in the system. All the power lines (10-4 kV lines and 4-12 kV lines) to downtown Stockton are buried in the substation yard. Other energized lines connect all the equipment in the yard to the controls in the building. If the substation were de- energized to allow an investigation, approximately 20,000 customers in downtown Stockton including City Hall , County and State offices, the courthouse, the police station, numerous banks, and a portion of the Port of Stockton would be without power. Therefore, based on the site history which identifies very limited chemical usage, the chemical results for the soils sampled, the current and future site use as an electrical substation, and the dangers and disruptions inherent in subsurface investigation near high voltage equipment, PG&E strongly recommends no further site investigation be performed in Area II . 2. Project Schedule. As you requested, the project schedule has been revised to include an period for treatability studies prior to evaluating remedial action alternatives and a submittal date and review period for the Risk Assessment. We have scheduled these additional activities to occur concurrently with other project activities as much as possible, to minimize the extension of the total project schedule. The revised project schedule is enclosed. We look forward to your final approval of this Workplan. If there are any other issues that you would like addressed, please notify me as soon as possible at (415) 973-1116. Sincerely, Yvonne J. Meeks, R.G. , C.E.G. Manufactured Gas Plant Project cc: Mr. William Crooks, Executive Officer Regional Water Quality Control Board Central Valley Region 3443 Routier Road Sacramento, CA 95827 Mr. Ron Valinoti , Director San Joaquin Local Health District P.O. Box 2009 Stockton, CA 95202 Attention: Ms. Eleanor Ratliff Enclosures