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s <br /> EDMUNn G. BROWN JR. <br /> •L �. GOVERNOR <br /> MArTHEw'O�ItIOi MI• iii <br /> \ RORIOUEZ <br /> SECRETARY R <br /> Water Boards ENVIRONMENTAL PROTECTION <br /> Central Valley Regional Water Quality Control Board <br /> REcavEo <br /> 20 January 2016 JAN 2 5 2016 <br /> ENORONMENTAL N <br /> PERMIT/SERVICES L� <br /> Mr. Taj M. Bahadori, PE <br /> Senior Civil Engineer <br /> San Joaquin County Public Works, Solid Waste Division <br /> 1810 E. Hazelton Avenue <br /> Stockton, CA 95201 <br /> SITE INSPECTION REPORT#2, NORTH COUNTY SANITARY LANDFILL, SAN JOAQUIN <br /> COUNTY <br /> The North County Sanitary Landfill is owned and operated by San Joaquin County (Discharger) <br /> and is regulated by Waste Discharge Requirements Order(R5-2010-0016) for construction, <br /> operation, and monitoring of the Class III Landfill. Staff inspected the site on 2 November 2015. <br /> This site inspection was the second inspection conducted as a follow up to the 21 October 2015 <br /> inspection concerning the damaged operations layer and torn geotextile fabric. Staff met Mr. <br /> Taj Bahadori of San Joaquin County and staff. Also in attendance was the construction quality <br /> assurance (CQA) monitor Mark Huggard of Advanced Earth Sciences Inc. (AES), Mr. John <br /> Moody and Mr. Todd Del Frate of the Central Valley Water Board. <br /> On the 2 November 2015 inspection, active filling in Area 5 had ceased as required. A short <br /> precipitation event had passed through the area prior to this inspection. The damaged liner <br /> area was surrounded by a soil berm and covered in plastic sheeting to prevent run-on into the <br /> exposed leachate collection and recovery system (LCRS)-gravel. Areas outside of the berm <br /> were inspected but no damage from the rain to the area of concern was observed. <br /> As shown in the photographic log (enclosed) the damaged area had been cleared, exposing the <br /> underlying LCRS gravel and cushion geotextile. The cushion geotextile was the focal point <br /> during this inspection. Staff was concerned the geomembrane underlying the geotextile could <br /> have been damaged requiring a significant repair effort if true. Staff inspected the exposed <br /> cushion geotextile and it was determined that the cushion geotextile was not damaged and that <br /> the underlying geomembrane layer was in original condition. Staff expressed no concerns with <br /> the lower barrier and agreed the County could begin the backfilling of LCRS gravel. As shown <br /> in the photographic log, gravel was placed by backhoe and distributed evenly by hand. <br /> The remaining question during this inspection was the functionality of the LCRS gravel. Staff <br /> had requested the Discharger provide evidence the LCRS gravel functioned as designed by <br /> conducting a LCRS test. It was agreed upon during the inspection that the LCRS test would be <br /> conducted with only the gravel filling damaged area. Staff completed observing the <br /> reconstruction once the damaged area was backfilled with 75% LCRS gravel. Furthermore, <br /> staff did not witness the LCRS gravel test but was notified by email dated 9 November 2015, <br /> KARL E. LONGLEY SCD, P.E., CHAIR I PAMELA C. CREEDON P.E., BCEE, EXECUTIVE OFFICER <br /> 11020 Sun Center Drive#200,Rancho Cordova,CA 95670 1 www.waterboards.ca.gov/centraIvalley <br /> t.�RECYCLED PAPER <br />