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C <br /> Pacific Gas and Electric, Company Environmental Services ECE� <br /> P.O. <br /> 0.Box 7640 n <br /> 415/973-7000 San Francisco, <br /> CA 94120 Q C T 2 U 1992 <br /> Direct <br /> opy411973-9 ENVIRONMENTAL HEALTH <br /> relecopy4157s73-s2o1 PI=RMIfi/�K�iVicLo <br /> October 15, 1992 <br /> Mr. Val F. Siebal <br /> California Environmental Protection Agency <br /> ' Department of Toxic Substances Control <br /> 10151 Croydon Way <br /> Sacramento, CA 95827 <br /> Attention: Mr. Fernando Amador <br /> Dear Mr. Siebal : <br /> Re: Docket #HSA 90/91-08 - Stockton Manufactured Gas Plant Site <br /> Subject: October 1992 Quarterly Summary Report <br /> This quarterly summary report was prepared in accordance with Provision <br /> 3.7 of the referenced order. This report summarizes technical <br /> activities conducted by PG&E in compliance with the order during the <br /> quarter from July through September 1992, and activities planned for the <br /> current and subsequent quarters. <br /> (a) Technical Activities Performed During Previous Quarter <br /> The second quarter monitoring report was submitted to DTSC on July <br /> 28. Monthly water level monitoring was conducted each month <br /> during the quarter as specified in the Workplan. <br /> Third quarterly water quality sampling was conducted during the <br /> third week of August. Analyses were conducted as specified in the <br /> Workplan with the deletion of phenols as agreed to by DTSC in your <br /> May 7 letter. <br /> A letter report documenting the completion of the Interim Remedial <br /> Measure for the Hazelton Avenue strip was submitted to DTSC on <br /> July 28, and a revised version submitted on September 22. <br /> The Phase 2 Supplemental RI Workplan for Area I was submitted and <br /> approved on August 6, 1992. Five borings and three wells were <br /> installed and sampled between August 3 and August 17. <br /> PG&E has continued preparing the draft Remedial Investigation (RI) <br /> Report and Risk Assessment. <br />