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mss. <br /> COUNTY OF SAN JOAQUIN THOMAS R.FLINN <br /> :< DEPARTMENT OF PUBLIC WORKS DEPUTY DIRECTOR <br /> P.0.BOX 1810—1810 E.HAZELTON AVENUE MANUEL LOPEZ <br /> •: '• <br /> � STOCKTON.CALIFORNIA 95201 DEPUTY DIRECTOR <br /> CqC! �eP (209)468-3000 STEVEN DEPUTY DIRECTOR <br /> L R <br /> F®R <br /> FAX(209)468-2999 <br /> HENRY M.HIRATA <br /> DIRECTOR <br /> Irt <br /> March 14, 1997 <br /> TO: Ed Padilla, Lead Senior RENS <br /> Public Health Services <br /> Environmental Health Division <br /> FROM: Gabriel Karam c• t,- <br /> Senior Solid Waste Engineer <br /> SUBJECT: LANDFILL GAS MONITORING AT THE <br /> CORRAL HOLLOW SANITARY LANDFILL <br /> This is in response to your letter dated January 3, 1997, <br /> regarding landfill gas monitoring/control at the Corral Hollow <br /> Sanitary Landfill . The County would like to apply for an <br /> exemption from the requirement of installation of a landfill gas <br /> control system. Your letter stated that an exemption may be <br /> considered if certain information was provided. The following is <br /> the requested information in the order shown in your letter: <br /> 1. Obtain confirmatory samples that identify trace gas <br /> constituents detected at various wells (Air SWAT Data) . <br /> The County performed an Air Solid Waste Assessment Test <br /> (SWAT) in September 1988 . Attached are the results of the <br /> landfill gas sampling from the 1988 SWAT. <br /> 2 . Identify corrective action measures to control gas migration <br /> at the landfill. <br /> The current strategy for landfill gas migration control <br /> consists of minimizing gas production due to the existence <br /> of the clay barrier layer which was installed during closure <br /> in 1995. The clay barrier layer will reduce the amount of <br /> moisture entering the landfill which will reduce landfill <br /> gas production over time. <br />