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MICHAEL SELLING <br />DEPUTY DIRECTOR <br />FRITZ BUCHMAN <br />DEPUTY DIRECTOR <br />JIM STONE <br />DEPUTY DIRECTOR <br />KRIS BALAJI <br />DIRECTOR <br />NAJEE ZARIF <br />INTERIM BUSINESS ADMINISTRATOR <br />January 30, 2017 <br />Mr. Todd Del Frate, PG <br />Central Valley California Regional Water Quality Control Board <br />11020 Sun Center Drive, #200 <br />Rancho Cordova, California 95670 <br />�4 <br />P. O. BOX 1810 -1810 E. HAZELTON AVENUE <br />STOCKTON, CALIFORNIA96201 <br />(209) 468-3000 FAX (209) 468-2999 <br />www_sjgov.orgtpubworks <br />SUBJECT: SECOND SEMIANNUAL AND ANNUAL 2016 GROUNDWATER AND SURFACE <br />WATER MONITORING REPORT, NORTH COUNTY SANITARY LANDFILL <br />Dear Mr. Del Frate: <br />Enclosed is the Second Semiannual and Annual 2016 Groundwater and Surface Water Monitoring <br />Report for the North County Recycling Center and Sanitary Landfill (NCRCSL), submitted in accordance <br />with Waste Discharge Requirements R5-2010-0016. <br />Below is a summary of the findings for 2016: <br />All concentrations of field and monitoring parameters were below established concentration limits in wells <br />G -2A and G -5A during the 2nd semi-annual 2016 monitoring period. Samples could not be collected <br />from wells G -1A, G -3D, G-4, or G-6 during this monitoring period due to low water levels. However, <br />water level measurements could be collected in these wells for the purpose of determining the <br />groundwater flow direction. <br />Two additional groundwater monitoring wells (wells G-7 and G-8) were installed to augment the site's <br />monitoring network (see figures 3 and 4). These two wells will be sampled along with the existing wells, <br />starting in 2017. <br />VOCs were not detected in any groundwater monitoring wells sampled during this period. <br />The lysimeters did not yield enough water for sampling, indicating no detectable leaks from the liner in <br />those areas. Unsaturated zone monitoring will continue in accordance with the WDRs. <br />Results of leachate monitoring are consistent with past leachate monitoring events. The second <br />semiannual leachate monitoring event occurred on July 20, 2016. Twenty-three (23) different VOCs <br />were reported in the leachate samples. The highest VOC concentrations reported were those of xylenes, <br />naphthalene, and some of the benzene compounds. <br />