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Page 3.3 SEC77ON 3-ENVIRONMENTAL MONR'OR1NG <br /> A new monitoring program that would comply with Article 5 requirements has been proposed; <br /> however, it has not yet been approved by the RWQCB. A copy of the proposed program is <br /> included as Attachment A. <br /> 3.2 CORRECTIVE ACTION PLAN <br /> 1 <br /> The City has implemented a Corrective Action Pian (CAP) dated August 1991, prepared by <br /> EMCON Associates (EMCON) and approved by the RWQCB. The CAP includes the installation <br /> of an extraction and treatment system to mitigate groundwater impacts to address detected <br /> chlorinated hydrocarbon impacts on the first encountered groundwater beneath the Austin Road <br /> Landfill. As discussed in EMCON's report, "chlorinated hydrocarbons are the only volatile organic <br /> compounds (VOCs) detected at concentrations greater than established maximum containment <br /> levels (MCLS). In summary, the report presents the following information: <br /> ■ a description of site conditions, including past and future property uses, and regional and <br /> local geologic and hydrogeologic conditions <br /> ■ a description of ground-water impact, including definition of`the compounds of concern <br /> (chlorinated hydrocarbons), the lateral and vertical extent of chlorinated hydrocarbon <br /> migration, their migration path and rate, and potential receptors <br /> ■ an evaluation of alternative corrective actions,justification for the recommended alternative <br /> (extraction and treatment of groundwater,and a discussion of recommended technologies <br /> j to be used in implementing the recommended corrective actions <br /> a activities to be conducted to install the proposed extraction and treatment system and a <br /> timeline for implementation <br /> a proposed methods for evaluating the corrective action effectiveness. <br /> 3.3 SURFACE WATER MONITORING <br /> j The North Branch of the South Fork of little Johns Creek(Little Johns Creek) currently splits the <br /> existing City landfill area into an approximate 135-acre parcel north of the Creek and an <br /> approximate 45-acre parcel south of the Creek. The RWQCB has required monitoring samples <br /> to be collected quarterly from the Creek and analyzed. Little Johns Creek will be relocated and <br /> i lined to limit the potential for surface water contamination due to landfill operations or groundwater <br /> intrusion. Little Johns Creek will be sampled upstream and downstream of the landfill facility; <br /> concentrations of indicator parameters or waste constituents at these points of compliance shall <br /> not exceed the established water quality protection standards. Surface water samples will be <br /> collected and analyzed on a quarterly basis for the following: <br /> Ciy cr a:akton R.W.Beck and ASSOCA as <br /> 1811.002 <br />