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3- 14 _Cb(J <br /> CITY OF STOCKTON <br /> A;P <br /> DEPARTMENT OF PUBLIC WORKS <br /> CITY HALL <br /> 425 N.EL OORAOO STREET <br /> STOCKTON,CA 95202-1997 FACILITY FILE CARBON COPY <br /> November 26, 1997 .>61, <br /> ORIGINAL TO FILE <br /> suBMn7ED BY DATE <br /> Jeff Hackett, Waste Management Specialist COPYTo ' <br /> Integrated Waste Management Board COPY TO <br /> 8800 Cal Center COPY TO <br /> Sacramento, CA 95826 COPY TO <br /> AUSTIN ROAD LANDFILL - METHANE GAS CONTROL PLAN <br /> The purpose of this letter is to layout a plan to address the elevated levels of methane <br /> gas that have been detected in gas monitoring wells SGP-11A and 12A at the Austin <br /> Road Landfill. The location of these wells are shown on the attached Drawing #1. <br /> Elevated levels of methane had been detected in monitoring wells SGP-3, 10, 11, and <br /> 12 at Austin Road during second and third quarter monitoring.. Because these wells <br /> were located in waste and not at the property boundary, they were moved. After <br /> relocation, only wells SGP-11A and 12A continued to show elevated levels of methane. <br /> Because of the expansion of the Austin Road Landfill, additional property has been <br /> purchased to the north. This additional property would allow the installation of two <br /> additional wells (SGP-13 and 14) along the property boundary directly to the north of <br /> wells SGP-11A and 12A as shown on Drawing #1. These new wells would allow for the <br /> monitoring of methane levels at the property boundary in accordance with Section <br /> 20919.5 of Title 27 which states that owners and operators must ensure that the <br /> "concentration of methane gas does not exceed the lower explosive limit for methane at <br /> the facility property boundary'. <br /> The City already has a firm under contract to install these two additional wells. Upon <br /> approval of this work plan, these new wells should be in place and tested within one <br /> week. If the results from these new wells do not show elevated levels of methane, then <br /> the landfill will be in compliance with the applicable regulations. <br /> 9 fig ; <br /> T.\WPWIN\SOLI DWSTVAUSTIN RD\PLAN.GAS <br /> "STOCKTON...CALIFORNIA'S SUNRISE SEAPORT" <br />