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Arcady Oil 2 30 April 2009 <br /> San Joaquin County <br /> Fourth Quarter 2008 <br /> Water Quality Data <br /> Approximate Sample Location Chloride <br /> Distance from Water Quality Limit 106 mg/1— <br /> Whiskey Slough A riculture Goal <br /> --- Slou h SW-1 111 m /I <br /> 38 feet MW2 173 m /I <br /> 225 feet Drilling Mud DP-9 996 mg/I <br /> A ril2008 <br /> 300 feet MW5 656 m /I <br /> Section 3.3.1 of the report presents the Discharger's waste classification of the drilling mud. <br /> The Discharger has classified the drilling mud as a nonhazardous waste. Nonetheless, the <br /> drilling mud's soluble constituents have impacted in the underlying groundwater beneficial <br /> uses. Therefore according to Section 20210 of CCR Title 27, this material is a designated <br /> waste and must be handled as such. <br /> Item 2 of the CAO directed the Discharger to implement a groundwater monitoring program. <br /> Due to the apparent impacts to groundwater, the Discharger must develop a monitoring <br /> program for groundwater that includes a plan for defining the vertical and lateral extent of the <br /> plume. This proposed monitoring plan shall be submitted no later than 1 August 2009. <br /> The Discharger recommended seven scenarios for completing closure of the DePoali <br /> property. Staff evaluated the proposals and concurs with following the proposals to either <br /> clean close the site or consolidate the waste under an alternative cover design Therefore, no <br /> later than 1 August;2009, a closure plan that incorporates one of the two above site closure <br /> proposals shall be submitted. As discussed in our 16 April 2009 meeting, this plan must <br /> include detailed cost analysis for each proposed closure scenario. <br /> If you have any questions before that time, please contact me directly at 916-464-4679. <br /> HOWARD HOLD <br /> Engineering Geologist <br /> Compliance and Enforcement <br /> Title 27 and WDR Programs <br /> cc: Mr. Jerry Lile, Department of Toxic Substances Control, Sacramento <br /> Ms. Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Mark Bradford, ERM West, Sacramento <br /> Mr. Ron Barber, Manteca <br /> Mr, David Isola, Isola and Bowers, LLP, Lodi <br />