SITE INFORMATION AND CORRESPONDENCE

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• q3 - � � 1 ** Fmcon AsAciates 1433 North Market Boulevard • Sacramento,California 95834119 - L� 43',�(i916),Q28T3dWI {99$)928-3341 i.}u1y�12Q'T 9� 0�3 Proposal P93-040.31 Mr. Philip Isorena California Regional Water Quality Control Board Central Valley Region 3443 Routier Road, Suite A Sacramento, California 95827-3098 Re: Workplan for Phase 11 Site Assessment, Port of Stockton Terminal Facilities, Stockton, California Dear Mr. Isorena: On behalf of the Stockton Terminals Technical Committee (STTC), EMCON Associates (EMCON) is pleased to submit this workplan for a phase 11 site assessment of the Port of Stockton Terminal Facilities. The scope of work is based on the findings of the February 1993 Interim Pollution Assessment Report (IPAR), comments by the Regional Water Quality Control Board (RWQCB) following review of the IPAR, and subsequent discussions with Philip Isorena and Wendy Cohen of the RWQCB at the May 6, 1993, meeting. SCOPE OF WORK The objective of the phase II site assessment is to define the lateral and vertical extent of petroleum hydrocarbon impact to the subsurface. Areas of petroleum hydrocarbon impact to the A- and B-zones were identified across the site in the IPAR; however, further study is required to characterize the lateral and vertical extent. In addition, impacts to the lower water-bearing zones, if any, will be investigated. Activities associated with the phase II site assessment are organized into 13 tasks, as described in the following sections and summarized on Table 1. Task 1. Preliminary activities, including coordinating with the STTC and facility representatives, clearing underground utilities, scheduling subcontractors and materials, obtaining drilling and well installation permits, and updating the site safety plan. SAC/PROT93,P9304031.1be-93 lmc:5