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p44RIry <br /> e• Za <br /> THOMAS M.GAU P.O.BOX 1810-1810 E.HAZELTON AVENUE <br /> Y. DIRECTOR tC `f�c, (> STOCKTON,CALIFORNIA95201 <br /> •`'�%F a R�P T (209)468-3000 FAX(209)468-2899 <br /> wmv.sjgov.org1pubworks <br /> MICHAEL SELLING "sf <br /> DEPUTY DIRECTOR for <br /> "r <br /> STEVEN WINKLER <br /> DEPUTY DIRECTOR <br /> ROGER JAMES <br /> BUSINESS ADMINISTRATOR <br /> July 9, 2012 <br /> Mr. Todd Del Frate, PG <br /> California Regional Water Quality Control Board <br /> 11020 Sun Center Drive, #200 <br /> Rancho Cordova, California 95670 <br /> SUBJECT: FIRST SEMESTER 2012 GROUNDWATER AND SURFACE WATER <br /> MONITORING, HARNEY LANE SANITARY LANDFILL <br /> Dear Mr. Del Frate: <br /> Enclosed is the First Semester 2012 Groundwater and Surface Water Monitoring Report <br /> for the closed Harney Lane Sanitary Landfill, submitted in compliance with current <br /> Waste Discharge Requirements. <br /> I am pleased to report that only two VOCs were detected, with only one compound <br /> above trace concentration (but less than 1 ppb). This is a significant improvement over <br /> previous years, in which several compounds were reported and in concentrations above <br /> 1 ppb. This improvement indicates success in the corrective action at the site, and that <br /> additional landfill gas wells are not needed at this time. <br /> These conditions are consistent with those presented in previous reports. <br /> Data from recently-installed MW-5 and -6 continue to indicate that the wastewater <br /> treatment ponds north of our "secondary site" have an effect on the groundwater; <br /> however, this effect seems to be minor and dissipates as the groundwater moves onto <br /> our site to reach MW-4. <br /> Sanitas software indicates an increasingtrend for turbidity at MW-2 and -3 and <br /> y <br /> Bicarbonate Alkalinity at MW-3. However, these parameters appear to be within the <br /> range of previous monitoring data. Reporting a "significant increasing trend" with such <br /> small variation in data is an unfortunate feature of the Sanitas software. An increasing <br /> trend of conductivity at MW-2 is no longer reported. <br /> Some potentially ponding areas have been regraded. This work continues in <br /> preparation for the winter. <br />