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California Regional Water Quality Control Boar ,k . <br /> Central Valley Region <br /> Steven T. Butler,Chair <br /> Winston H. Hickox N Gray Davis <br /> Secretaryjor Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/mgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 " <br /> Phone(916)255-3000•FAX(916)255-3015 N - <br /> C.n <br /> co <br /> 24 July 2000 _- <br /> Mr. Cecil Dillon Mr. Richard Bokides Mr. Navtej Dhingsa <br /> Flag City Ltd. Partnership Bokides Family Ltd. Part. First Invest. Flag City, Inc. <br /> 1820 W. Kettleman Lane, Suite E 6421 Capitol Avenue 5517 Coronawood Lane <br /> Lodi, CA 95242 Lodi, CA 95242 Carmichael, CA 95608 <br /> REVIEW PROBLEMASSESSMENT REPORT <br /> FLAG CITY CHEVRON, 6421 CAPITOL AVENUE, LODI, SAN JOA QUINCOUNTY <br /> CLEANUP AND ABATEMENT ORDER NO. 5-00-700 <br /> I reviewed your 19 June 2000 Problem Assessment Report(PAR) submitted by Advanced <br /> GeoEnvironmental, Incorporated (AGE) for the subject site. The PAR presents a summary of site <br /> investigation activities, a description of soil and groundwater contamination identified on and off site, <br /> and a proposed strategy to remediate soil and groundwater contamination. <br /> The maximum extent of groundwater contamination is shown to extend from the site southwest across <br /> Thornton Road onto the Rocky's Restaurant lot (See enclosed Figures 1 and 2 from AGE's PAR). The <br /> extent of groundwater contamination has not been defined near the on-site fuel dispensers, northeast of <br /> fuel dispensers, southeast of MW-6, and southwest of Rocky's Restaurant domestic well and MW-12. <br /> Complete site assessment work is required. <br /> The highest concentrations of fuel products dissolved in groundwater were identified on-site near the <br /> active fuel dispensers. Grab water samples collected near the fuel dispensers contained up to <br /> 11,000 micrograms per liter (µg/1)total petroleum hydrocarbons as gasoline (TPHg), 10,000 µg/1 MtBE, <br /> and 1,900 µg/1 total petroleum hydrocarbons as diesel (TPHd). All three of these values are above the <br /> maximum historical concentrations previously identified at the site, and the presence of fuel products <br /> near the dispensers suggests a new release has occurred. You must take action immediately to <br /> investigate and correct this new release. By 15 August 2000, submit a report of findings to <br /> document your investigation and corrective measures. <br /> The PAR also identified Rocky's Restaurant domestic well (RDW-1) as a conduit for contamination to <br /> migrate into deeper water bearing zones. The maximum MtBE concentration identified in RDW-1 is <br /> 20 µg/1. Potable water has been provided to Rocky's Restaurant since 3 March 2000, and an alternate <br /> water source is being investigated as a permanent supply to Rocky's Restaurant. <br /> RDW-1 is screened at three intervals, 67-76 feet, 87-104 feet, and 130-142 feet, and reportedly gravel- <br /> packed from 50 to 150 feet. Multi-level monitoring well MW-1 I was installed near RDW-I to monitor <br /> these screen zones, and MtBE concentrations up to 270 µg/1 were identified at 65 to 75 feet. Based on <br /> the MtBE concentrations, the multiple screening intervals, and the gravel-pack interval, RDW-1 must be <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br />