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COUNTY OF SAN JAU I THOMAS R. FLINN <br /> :< DEPARTMENT OF PUBLIC WORKS DEPUTY DIRECTOR <br /> ®: ,® P.O.BOX 1810-1810 E.HAZELTON AVENUE MANUEL LOPEZ <br /> STOCKTON,CALIFORNIA 95201 r DEPUTY DIRECTOR <br /> (209)468-3000 a STEVEN WINKLER <br /> 9t�F0Rd FAX(209)468-2999 I' !9 m ! DEPUTY DIRECTOR <br /> HENRY M.HIRATA <br /> DIRECTOR <br /> March 23, 1998 <br /> TO: Greg Oliveira, SREH3 <br /> Public Health Services <br /> Environmental Health Division <br /> FROM: Wes Johnson W11< <br /> Assistant Engineer <br /> SUBJECT: LANDFILL GAS MONITORING AT THE <br /> FOOTHILL SANITARY LANDFILL <br /> On March 12, 1998, Solid Waste Division staff monitored for <br /> landfill gas migration at the Foothill Sanitary Landfill . <br /> Environmental Health Division staff previously requested the <br /> installation of more permanent monitoring points. Accordingly, <br /> the Foreman installed four PVC pipes with caps at four locations. <br /> The pipes are open at the bottom and they are approximately two <br /> and one-half feet deep. These probes are now used by County <br /> staff for monitoring. <br /> The County used a GasTech Landfill Monitor to perform the <br /> monitoring. The instrument was calibrated using standard GasTech <br /> gas calibration canisters prior to monitoring. <br /> The results from the first quarter 1998 monitoring event are <br /> shown on the attached map. The readings for all probes and <br /> structures are shown adjacent to their locations on the map. if <br /> you have any questions, please call me at Extension 83066. <br /> WJ:vj <br /> R:I VIRGI NIA IMEMOSIFH-GA S.398 <br /> Attachment <br /> c: Scott Walker, California Integrated <br /> Waste Management Board <br /> LA 63229 <br /> LA 31209 <br />