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March 30, 1992 TO: Attendees- Austin Road Landfill Meeting at RWQCB, Sacramento FROM: Mike Miller, City of Stockton SUBJECT: Minutes of March 11 1992 Meeting Concerning Austin Road Landfill Remediation Project Below is a summary of the major issues we discussed at the meeting on March 11, 1992. If any of this differs from your understanding of what transpired, I would appreciate you letting me know as soon as possible. 1. Groundwater Treatment Plant Design Parameters: Bill Marshall said he would like to see the analysis which was done to establish the treatment system design efficiency parameters. Mark Thomas (EMCOM) said EMCON has that information available would send it to the regional board. 2. NPDES Permit: Wayne Pierson (RWQCB- NPDES SECTION) said his section was overloaded with work and short of staff and as a result would not be able to review the Austin Road Landfill NPDES permit application immediately. Wayne said Pat Leary of his staff would be working on the application when she could get to it. Mr. Pierson also asked if the water being treated contained metals. Mark Thomas (EMCON) responded that since it was ground water, metals were present. Mr. Pierson subsequently mentioned that the NPDES permit would likely contain stringent (low) limits for metals as well as for the organic compounds. The subject of the Fish and Game Department's involvement in the permitting process was discussed. Wayne said that Fish and Game would have an opportunity to comment on the remediation project during the NPDES permit review process. 3. Capture Zone Analysis: Bill Marshall asked if EMCON had done a capture zone analysis as part of their work on the Remediation Project. J.C. Isham (EMCON) said although EMCON did not do groundwater modeling, they did do a capture zone study which showed the pumping cone of dispression would encompass the width of the plume at the downgradient edge of the landfill. Mr. Marshall said that the arithmetic approach used to predict the capture zone was acceptable and that confirmation of the capture zone would be based on future ground -water monitoring. 4. Landfill Gas (LFG) Condensate Disposal: Tim Christ (CIWMB) said the new Federal landfill regulations prohibit return of LFG condensate to landfills starting in 1993. Tim said his agency would like to see progress made toward eliminating return of LFG condensate at Austin Road landfill. The City of Stockton informed Mr. Christ that an addendum to the NPDES permit was being prepared to allow for future treatment of the condensate using the ground- water treatment system. However, implementation of condensate treatment would not occur in the near future. Rather, that Pacific