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0 <br />CLEANUP AND ABATEMENT ORDER NO. R5-2006-0707 2 <br />COVE CONTRACTORS, INC. AND <br />EL DORADO PROPERTY MANAGEMENT, INC. <br />COVE CONTRACTORS FACILITY <br />SAN JOAQUIN COUNTY <br />northern 15 acres (APN 177-020-028) was sold to El Dorado Property Management and is now <br />the site of Universal Services Recycling, LLC. Waste disposal operations ceased in 1982. Waste <br />was disposed on nearly the entire southern portion of the site (owned by Cove Contractors) and <br />an eastern triangular portion of the property (owned by El Dorado Property Management) as <br />shown on Attachment A, which is included and made part of this Order by reference. <br />5. Technical reports submitted to the Regional Board have indicated that only inert and non- <br />putrescible waste was disposed of at the facility. Groundwater monitoring data suggests, <br />however, that non -inert waste was disposed of at the facility because VOCs and increasing <br />concentrations of inorganic constituents (TDS, sulfate, chloride and metals) have been detected in <br />the groundwater. In addition, methane was measured at 52% in one of the interior gas probes, <br />which is not a characteristic of inert waste. <br />6. In February 1995, the Regional Board received a Closure and Post Closure Plan for the facility <br />and found the plan to be incomplete. Between 1995 and 2003, the Regional Board requested <br />additional information regarding the closure. In 2003, the Regional Board received a Landfill <br />Closure and Post -Closure Maintenance Plan. The plan was incomplete and additional <br />information was requested. <br />:1 \1# 04T'1`41 <br />I F1 UUM <br />7. In 1989, the Regional Board received a groundwater monitoring report. Based on the results of <br />the groundwater monitoring, the site is impacting groundwater because of the increased <br />concentrations of TDS and sulfate in downgradient monitoring wells as compared to upgradient <br />monitoring wells. In addition, aromatic VOCs and increased concentrations of metals were <br />detected. <br />8. In 2003, additional groundwater monitoring was performed. The data showed detectable <br />concentrations of benzene, ethylbenzene, isopropylbenzene, toluene, p/m xylenes, acetone and <br />trichloroethene in downgradient wells. In addition, increased concentrations of TDS, chloride <br />and sulfate were present in downgradient monitoring wells. Seven metals (arsenic, barium, <br />beryllium, total chromium, nickel, selenium, and vanadium) exhibited concentrations exceeding <br />water quality objectives in one or more wells. For example, in downgradient well MW -3, <br />concentrations of arsenic, barium, total chromium and nickel exceeded their Primary Maximum <br />Contaminant Levels. <br />RECENT REGULATORY HISTORY <br />9. On 26 September 2005, the Executive Officer issued a California Water Code (CWC) Section <br />13267 Order requiring the Discharger to submit a Revised Closure Plan and a Groundwater <br />Investigation Workplan for the facility. <br />