Laserfiche WebLink
Mr.McClellon <br /> August 25,2004 <br /> well as the California Regional Water Quality Control Board. We also noted a house that appeared to <br /> have been built within the past year on the parcel adjacent to the landfill. Though CIWMB (and LEA) <br /> jurisdiction extends only to landfill permitted boundary, staff are concerned with gas migration from the , <br /> site and into the adjacent parcel. Staff had recommended previously that any structure on the adjacent <br /> parcel located within 1,000 feet of the landfill footprint should meet standards outlined in 27 CCR, <br /> §21190,post closure land use. <br /> Please note that a number of gas monitoring probes were missing identifications. In addition several <br /> valves were defective in that the valve would easily separate from the probe, thus not having a tight <br /> fitting as required. All defective gas monitoring probes shall be corrected immediately. Due to the high <br /> concentrations of landfill gas detected, CIWMB staff suggest that the operator increase the landfill gas <br /> monitoring frequency to weekly until such time that gas concentrations are brought under control and <br /> within the regulatory limits. The result of our gas monitoring is included in the following table: <br /> Probe# CH4 % CO2 % 02 <br /> GWl ------------ -------------- ------------- <br /> Dee 8.1 21.0 1.2 <br /> Intermediate 33.2 29.6 0 <br /> Shallow 0.4 2.4 17.7 <br /> GW2 --------------- --------------- --------------- <br /> Deep, <br /> -------------- <br /> Dee ***** ***** ** * <br /> Intermediate 0.3 18.4 0.7 <br /> Shallow 0.3 3.6 16.5 <br /> GW3 ---------------- ----------------- ----------------- <br /> Dee 7.0 13.7 0.2 <br /> Intermediate 1.2 17.0 0.7 <br /> Shallow 0 2.3 18.7 <br /> GW5 ---------------- ---------------- ------------------- <br /> Dee 0.4 15.6 6.7 <br /> Intermediate 0.3 16.7 5.5 <br /> Shallow 0.3 6.1 14.9 <br /> GW9 <br /> Deep Not able to Monitor due to Inadequate probe <br /> Intermediate Not able to Monitor due to Inadequate probe <br /> Shallow Not able to Monitor due to Inadequate probe <br /> Thank you and please call Mr. Gino Yekta of my staff at(916) 341-6354 or me at(916) 341-6318 if you <br /> have any questions. <br /> Sincerely; <br /> Michael B. Wochnick, P.E. <br /> Closure and Technical Services <br /> Cc: Ms.Kim Schwab,California Regional Water Quality Control Board <br />