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In June 2003, the Evaluation Monitoring Program was completed. Groundwater samples from temporary borings were found free of contaminants. A soil gas well, SG-1, was bored to sample soil gas above the water table near groundwater monitoring well MW-3. Four VOCs were detected at SG-1; however, these compounds were not detected in the water samples taken at MW-3. Monitoring data from MW-3 continues to show no impact by VOCs. On September 16, 2003, due to delay in submitting the results of the Evaluation Monitoring Plan, the CVRWQCB issued a Water Code Section 13267 Order. This Order required that the County submit the results of the Evaluation Monitoring Program and an Engineering Feasibility Report that includes closure of Module `I'. On October 30, 2003, the County submitted a final Engineering Feasibility report to the CVRWQCB presenting the results of the Evaluation Monitoring Program. Corrective action was identified as preventing further ponding on the landfill surface near MW-3, this action taken in 1998. closure of Module "I" was discussed, but was not proposed as further corrective action, due to the apparent success of previous corrective action indicated by the of lack of groundwater contamination. On December 16, 2003, an Administrative Civil Liability Complaint was issued by the CVRWQCB for"not submitting a Closure Plan for Module `I"'. Negotiations in January 2004 resulted in a Clean Up and Abatement Order which requires the County to initiate the Foothill Landfill Site Improvement Project, which includes: Final closure of the crest of Module "I" Installation of a barrier between Module "I" and the future refuse placed over Module"I" in extension and completion of Module 1 • Landfill gas collection system • Partial Cover of those surfaces of Module"I"that are not covered by the inter-Module barrier or final closure Two groundwater monitoring wells This project is to be pursued in lieu of complete closure of Module "I". On July 20, 2004, the San Joaquin County Board of Supervisors approved a contract with Kleinfelder to design the Site Improvement Project. By February 2007, construction of the Site Improvement Project was substantially complete; however, failure by the construction contractor to follow the specifications regarding planting of the vegetation in the evapotranspirative (ET) closure cover prevented the vegetation from rooting properly. This area was replanted according to specifications in October 2007. In March 2008 it was noted that the ET cover vegetation was not sufficient due to inadequate nutrients in the soil. Addition of nutrient mulch and replanting is planned for October 2008. MONITORING PROGRAM Water quality is monitored in accordance with WDR Order No. R5-2003-0020. 1 Foothill Sanitary Landfill 5 Department of Public Works/Solid Waste 1s`Semester 2008 Groundwater Monitoring County of San Joaquin—July 31,2008