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roPgV IN•.0 r _ ` THOMAS M.GAU P.O.BOX 1810-1810 E.HAZELTON AVENUE DIRECTOR STOCKTON,CALIFORNIA 86201 �.• �G j F � • -3000 -2999(209)468 ppv www.sjgov.org/pubworks FRITZ BUCHMAN 444; . o DEPUTY DIRECTOR Wcwldng for YOU MICHAEL SELLING DEPUTY DIRECTOR JIM STONE DEPUTY DIRECTOR ROGERJANES BUSINESS ADMINISTRATOR January 28, 2014 Mr. Todd Del Frate, PG California Regional Water Quality Control Board 11020 Sun Center Drive, #200 Rancho Cordova, California 95670 SUBJECT: SECOND SEMESTER AND ANNUAL 2013 GROUNDWATER AND SURFACE WATER MONITORING, HARNEY LANE SANITARY LANDFILL rDear Mr. Del Frate: Enclosed is the Second Semester 2013 and Annual Groundwater and Surface Water Monitoring Report for the closed Harney Lane Sanitary Landfill, submitted in compliance with current WDRs. rI am pleased to report that VOCs at the previously-impacted wells continue to show significant improvement since 2006. At well MW-2, two chlorinated VOCs (CFC-12 and 1, 2- Dichloropropane) that previously indicated LFG impact were not detected. This is a significant improvement since 2007, when these compounds were consistently reported at this well. Conditions at the site are consistent with recent reports. We continue to see impact to groundwater inorganic constituents (not VOCs) moving to our site from the wastewater treatment ponds at the iterant labor housing facility. However, this impact is apparently attenuated as the water passes under landfill property, such that water quality within our property is higher than the water as it enters our property. The trend analysis by Sanitas software indicates an increasing trend for Turbidity and decreasing trends for Chloride and Sulfate during the first semester 2013 at MW-2. However, there has been no activity on the surface that would account for this change. There was no storm water discharge to the receiving waters (drainage ditch south of the landfill property) this semester. Storm water is only discharged by manually operating the pumps at the retention pond, and we did not need to operate the pumps this semester. rAs noted in the cover letter of the First Semester report, surface water samples are no longer taken at this site. CCR Title 27 Section 20415 (c) "Surface Water Monitoring Systems" paragraph (1) "General' requires that "The discharger shall establish a surface water monitoring system to monitor each surface water body that could be affected by a release from the Unit." The physical configuration of the landfill, retention pond and drainage ditch south of the retention pond makes it impossible to affect the "surface water" in the drainage ditch by sheet flow from the landfill. _r