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State Inspection- Foothill Sanitary Landfill Page 5 <br /> Facilitv No.- 39-AA-0005 <br /> COMMENTS: <br /> Overall site conditions and operations were excellent. I observed that cover, suitable for <br /> a textbook example, had been applied to the active face the previous operating day. Inter- <br /> mediate cover of an equally high calibre had also been placed over previously active areas <br /> of the landfill (see map) . <br /> Area of Concern: <br /> 14 CCR 17705 Gas Control- At the time of the inspection (8/4/92), Board staff using a <br /> combustible gas indicator (CGI), obtained gas readings as high as 440 parts per million <br /> (ppm) along the southern exterior foundation of the supervisor's residence located at the <br /> landfill (see map) . <br /> During a follow-up investigation on August 21, 1992, Board staff using two CGIs and San <br /> Joaquin County Public Works staff using a CGI, obtained gas readings as high as 380 ppm <br /> along the southern exterior foundation of the residence. At this time, Board and County <br /> Public Works staff monitored the interior space of the residence for the presence of gas. <br /> No gas (o ppm) was detected along the interior southern wall of the residence nor any other <br /> interior space monitored. <br /> Waste Management Specia �0_ <br />