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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br />CENTRAL VALLEY REGION <br />CLEANUP AND ABATEMENT ORDER NO. 5-00-704 <br />Kelm <br />CHEVRON PRODUCTS COMPANY <br />IVERN AND ROGER BAFFONI <br />AT <br />301 WEST KETTLEMAN LANE, LODI <br />SAN JOAQtIN COUNTY <br />The California Regional Water Quality Control Board, Central Valley Region, (hereafter Board) finds <br />that: <br />1. The former Chevron Station #9-5775 at 301 West Kettleman Lane in Lodi was operated as a <br />gasoline dispensing facility by Chevron Products Company until August 1998. The property was <br />and is now owned by Ivern and Roger Baffoni. Therefore, the Chevron Products Company, and <br />Ivern and Roger Baffoni, are hereafter collectively referred to as Discharger. <br />On 24 August 1998, five underground storage tanks (USTs), dispenser islands and associated <br />product piping were removed. In January 1999, five soil borings were drilled, and four of the <br />borings were completed as monitoring wells (MW -1 through MW -4) screened from 45 to 65 feet <br />below ground surface (bgs). Groundwater samples collected on 3 February 1999 were found to <br />contain up to: <br />• 11,000 micrograms per liter (µg/1) of total petroleum hydrocarbons as gasoline (TPI <br />• 6,800 µg/1 of benzene; <br />• 62,000 µg/1 of methyl tertiary butyl ether (MtBE); <br />• <br />2,400 Q 1 of ethyl tertiary butyl ether ETBE ; and / <br />µ� Y rY Y ( ) <br />• 780 µg/1 of tertiary amyl methyl ether (TAME). <br />3. Subsequent soil and groundwater investigations were completed, and one extractiog well and <br />five additional monitoring wells were installed. Extraction well EX -1 is screened from 55 to 65 <br />feet bgs, monitoring well MW -5 is screened from 70 to 75 feet bus, and the other monitoring <br />wells are screened from 45 to 65 feet bgs. Five groundwater sampling events have been <br />completed between February 1999 and March 2000. Groundwater samples collected on the <br />1 March 2000 quarterly monitoring and sampling event, were found to contain up to: <br />• 51,000 µg/1 of TPHg; <br />• 39,000 µg/1 of benzene; <br />• 720,000 µg/1 MtBE; <br />• 18,000 µg/1 ETBE; and <br />• 6,000 µg/1 TAME. <br />4. On 24 March 2000, Chevron's consultant, Gettler-Ryan Incorporated (GR) started weekly <br />pumping at extraction well EX -1. Approximately 300 gallons of groundwater was pumped -in 6.5 <br />California Environmental Protection Agency <br />rc� Ren cled Paper <br />