COMPLIANCE INFO_1989-1996 - Laserfiche WebLink

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Robert A. Evans, RWQCB Page 3 September 30, 1991 APPROVAL OF CORRECTIVE ACTION PLAN (CAP). AUSTIN ROAD LANDFILL. CITY OF STOCKTON it would be unwarranted to add these parameters to the list of constituents of concern. The elevated levels of TDS and EC in ground water from upgradient well MW -3, and the presence of tetrachloroethane in ground water from upgradient well MW -5, may be a result of upgradient diffusion from the landfill. Since the direction of ground -water movement is towards the landfill, no further action is proposed at this time. Comment If the City pursues reinjection of treated ground water, an underground injection permit may be required by the Environmental Protection Agency. Discharge to the City sewer system will require an industrial user permit from the local sewage treatment plant. Response The City's current plan is to obtain a National Pollution Discharge Elimination System permit and discharge treated ground water to Littlejohns Creek, which will allow for indirect recharge to ground water through the creek bed. Comment Before the final treatment technology for extracted ground water is selected, the CAP indicates that pilot studies will be conducted to determine the compatibility of the wastewater with each treatment method. The City should continue other efforts required by the CAP until the results of the pilot studies are received. Response The City has authorized EMCON to begin designing and preparing the technical specifications for the ground -water extraction system, as well as the conveyance piping from the extraction wells to the treatment system, and from the treatment system to the discharge point at Littlejohns Creek. The City has also authorized EMCON to begin the design of a concrete support pad on which to place the treatment system equipment. The City will continue efforts required to implement the CAP consistent with the project time line displayed on Figure 1. Comment Send more detailed information on the Kendall -tau test which is proposed for the statistical analysis of the data received from the CAP activities.