Laserfiche WebLink
�.`rte EDMUND G. BROWN JR. <br /> ��� GOYERNOP <br /> CA LPONNIA MATTHEW RODRIGUEZ <br /> Water Oars SECRETARY FOR <br /> ENVIRONMENTAL PROTECTION <br /> Central Valley Regional Water Quality Control Board <br /> 6 June 2018 <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 FOR THE FOOTHILL SANITARY LANDFILL, SAN JOAQUIN <br /> COUNTY <br /> The San Joaquin County Foothill Sanitary Landfill is regulated by Waste Discharge <br /> Requirements (WDRs) Order R5-2015-0058. Central Valley Water Board staff conducted a site <br /> inspection of the Foothill Sanitary Landfill on 31 May 2018. <br /> Staff met with Mr. Taj Bahadori, of San Joaquin County Department of Public Works Solid <br /> Waste Division. Staff began the inspection from the top deck of Module I and the <br /> Evapotranspiration (ET) cover. The cover had a robust vegetative cover established. No <br /> erosion (channeling or riling) of the cover or side slopes were observed on Module I during this <br /> inspection. Staff did observe the perimeter ditches around Module I need maintenance and <br /> should be cleared prior to the 2018/2019 wet season. <br /> Staff also inspected Landfill 2, where the Module 2A cell is actively being filled. While <br /> discussing the expansion of Landfill 2 and the timing, staff reminded the Discharger the need to <br /> have a 401 Certification from the Water Board and CEQA review prior to expansion of Module <br /> 2. <br /> During the inspection, the Discharger stated that the landfill gas (LFG) system is running at <br /> capacity due to an increase in LFG generation following the 2016/2017 wet season. Eight new <br /> LFG extraction wells were added bringing the total to 17 extraction wells. The gas to energy <br /> plant is running at capacity, which is delaying build out of Module I LFG extraction system. The <br /> Discharger conducts surface emission surveys of Module I, annually. Staff recommended <br /> monitoring of surface emissions be increased to semi-annual. <br /> Staff told the Discharger that LFG in the vadose zone is a concern as are detections of VOCs in <br /> groundwater. These detections suggest that additional LFG extraction is needed. Further <br /> evaluation of vadose zone and groundwater is appropriate to determine if control of migrating <br /> LFG is being achieved with the current LFG extraction system. <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/centralvalley <br /> `�RECYCLED PAPER <br />