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�1 Advanced �- i GeoEnviron mental , Inc . - '� 09 October 2000 AGE-NC Project No 96-0232 Subject: Public Notification Letter- Discharge of Treated Ground Water 6421 Capitol Avenue (FLAG CITY CHEVRON), Lodi, California To Whom It May Concern On behalf of the property owners for 6421 Capitol Avenue (Flag City Chevron), Lodi, California and in accordance with Attachment A of the Califorrua Regional Water Quality Control Board (RWQCB) General Order 5-00-119 For Discharge of Ground Water From Cleanup Of Petroleum Fuel Pollution To Surface Water, Advanced GeoEnvironmental, Inc (AGE) is hereby giving public notification that ground water cleanup activities will commence at the Flag City Chevron on 01 November 2000 The permitting process for Attachment A requires that a"Public Notification Letter"be subrmtted to adjacent properties, to the local County Health Department and to the California Department of Fish and Game "Che Flab City Chevron site is located approximately 5 rrules west of Lodi, California(see Figure 1) at the northeast intersection of Capitol Avenue and Thomton Road,approximately 500 feet south of the intersection of California State Highway 12 and Thomton Road The property is currently utilized as a Chevron fueling facility and a mini-market(see Figure 2) The facility consists of one building structure, a canopied structure for the fuel dispensing area, and four 12,000-gallon petroleum underground storage tanks (USTs) A ground water treatment system is proposed on the southwest section of the property (see Figure 2) Results of a subsurface investigation at Flag City Chevrons indicates that ground water at the site has been impacted by methyl tertiary butyl ether(MTBE), total petroleum hydrocarbons quantified as gasoline and diesel (['PH-g and TPH-I., respectively), low concentrations of dissolved 1,2-dichlorocthane(1,2-DCA), tert butanol (TBA), ethanol and methanol have been detected during investigation at the site A Problem Assessment Report, dated 19 June 2000 and a Final Remedialron Plan, dated 31 August 2000 was prepared by AGE for the site and submitted to the California Regional Water Quality Control Board-Central Valley Region (RWQCB) as required by the RWQCB's Cleanup and Abatement Order No 5-00-700, dated 01 March 2000 As a result of petroleum-impact to soil and ground water at the Flag City Chevron site, the RWQCB has directed by Cleanup and Abatement Order No 5-00-700 to install and continuously operate a ground water pump and treat remediation system in the areas of ground water contarrunation by 01 November 2000 Therefore, AGE intends to install an on-site multi-media ground water remediation system for treatment of extracted ground water Ground water will be extracted from extraction wells utilizing dedicated, submersible Grundfos pumps and . at pumping rates between 3 and 6 gallons per nanute(GPM) for a total discharge rate of 25 GPM From the extraction wells, ground water will be routed to an on-site treatment system The first stage of treatment will 4005 Norch Wfkon Way, SwLkton Cifitomic 95205 `Telephone i2-091 -16",.1006 FAX (?09)407-k 1 13