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PUBLIC AEALTH SER'V*ICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION " ` <br /> Karen Furst, M.D., M.P.H., Health Officer ;P.. <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> April 27, 1998 <br /> MEMORANDUM <br /> TO: Wes Johnson,Assistant Engineer <br /> San Joaquin County Public Works Department <br /> Solid Waste Division <br /> FROM: Greg Oliveira,Senior R.E.H.S�� <br /> (�--l-I <br /> Environmental Health Division <br /> SUBJECT: LANDFILL GAS MONITORING,HARNEY LANE LANDFILL <br /> Per my conversation with Tim Crist,California Integrated Waste Management Board,on April 23, 1998,it <br /> is the position of the Board that all gas monitoring probes shall be monitored every quarter,including those <br /> that exhibit negative pressure.This requirement is specified in California Code of Regulations,Title 27, <br /> Section 20932.The only exception is for flooded probes.According to Mr. Crist,probes with slight <br /> negative pressures,such as those found during the January 1998 monitoring event,can still be monitored <br /> without causing damage to sampling equipment.Probes with larger negative pressures should be monitored <br /> by evacuating gas to a Tedlar bag and then sampling the Tedlar bag with monitoring equipment. <br /> Please begin sampling all probes,except flooded probes,during subsequent monitoring events. <br /> cc: Tim Crist,California Integrated Waste Management Board <br /> A Division of San Joaquin County Health Care Services <br />