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suggests that corrective action measures have been successful in reducing facility related <br /> groundwater impacts downgradient of the Austin Unit. <br /> Surface water samples collected from the upstream and downstream surface water <br /> monitoring stations during the first quarter 2013 monitoring period are generally <br /> consistent with each other and no VOCs were detected. These results suggest that <br /> landfill operations are not impacting surface water. <br /> The results of the five-year COC monitoring event indicates that with the exception of <br /> one SVOC (di-n-butyl phthalate), no organic COCs were detected in the groundwater and <br /> surface water samples. It should be noted that phthalates are used as plasticizers in PVC, <br /> which is a common monitoring well material. Therefore,the presence of di-n-butyl <br /> phthalate in well AMW-4 at an estimated trace concentration is believed to be a field <br /> contaminant. Several inorganic COCl were detected in both up-gradient and down- <br /> gradient wells and surface water stations. The similarity in the concentrations in both up- <br /> gradient and down-gradient wells and surface water stations suggest that the inorganic <br /> COCs are naturally occurring and not related to the landfill. As a result, no changes to <br /> the current monitoring program are recommended at this time. <br /> 4.0 REFERENCES <br /> California Regional Water Quality Control Board, Central Valley Region, 2003, "Order <br /> No. R5-2003-0049 Waste Discharge Requirements for Forward Inc. and Allied <br /> Waste Industries for Operations of Forward Landfill a Class II Facility Landfill, <br /> San Joaquin County". <br /> CH2M Hill. 2000. Fourth Quarter/Annual 1999 Monitoring Report, Austin Road <br /> Landfill. January. <br /> Geologic Associates. 2001. Low-Level VOC Detections in Monitoring Wells, Forward <br /> Sanitary Landfill, San Joaquin County, California, (RWQCB Case No. 2209). <br /> February. <br /> Herst Associates ("Herst"). 2011. 2011 Annual Corrective Action Evaluation Report, <br /> Austin Road Landfill. July 2011. <br /> Kleinfelder, Inc. ("Kleinfelder"). 1999. 1999 Annual Monitoring Report, Forward <br /> Landfill, San Joaquin County, California. March. <br /> , 2000. Quarterly Monitoring Report, Third Quarter 2000, Forward Landfill, <br /> San Joaquin County, California. October 16. <br /> C:\2013-002ITA_1 QI3.duc 14 Geo-Logic Associates <br />