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r' °z COUNTY OF SAN JOAQUIN <br /> THOMAS R. FLINN <br /> DEPARTMENT OF PUBLIC WORKS h 1 P DEPUTY DIRECTOR <br /> . .' P.O.BOX 1810-1810 E.HAZELTON AVENUE MANUEL LOPEZ <br /> STOCKTON.CALIFORNIA 95201 DEPUTY DIRECTOR <br /> (Kq`IFOR��P (209)468-3000 - , r STEVEN WINKLER <br /> FAX(209)468-2999 ® 2 DEPUTY DIRECTOR <br /> HENRY M.HIRATA <br /> DIRECTOR <br /> April 16, 1998 <br /> Steve Rosenbaum <br /> California Regional Water <br /> Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, California 95827 <br /> Subject: GROUNDWATER MONITORING AT <br /> SAN JOAQUIN COUNTY LANDFILLS <br /> Dear Mr. Rosenbaum: <br /> This is regarding the groundwater sampling schedule for San <br /> Joaquin County owned landfills. In past years, the sampling <br /> schedule for San Joaquin County's four landfills has been <br /> staggered in different months as shown below, for example: <br /> PREVIOUS YEAR'S FIRST QUARTER SCHEDULE <br /> North County Recycling Center <br /> and Sanitary Landfill January <br /> Foothill Sanitary Landfill January <br /> Harney Lane Sanitary Landfill February <br /> Corral Hollow Sanitary Landfill March <br /> These sampling times probably correspond to the time of year in <br /> which the monitoring programs for each site were started. In an <br /> effort to reduce costs and simplify the monitoring program, the <br /> sampling for all County landfills will be performed during the <br /> same month in the calendar quarter. This will allow the sampling <br /> consultant to perform two sites in one trip, which will reduce <br /> mobilization and travel costs. Reports will still be mailed by <br />