ARCHIVED REPORTS_2008_2 - Laserfiche WebLink

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By February 2007, construction of the Site Improvement Project was substantially complete; however, the vegetation in the evapotranspirative (ET) closure was not well established. At that time, it was assumed that difficulty in growth was due to the failure of the Contractor to include fungus inoculants with the seed, as specified. In November 2007, the ET area was again reseeded, this time with fungus inoculants as specified. In the spring of 2008, it was determined that the seed growth remained insufficient for adequate ET cover. In November 2008, the closure cap soil was amended and fertilized, and again seeded. MONITORING PROGRAM Water quality is monitored in accordance with WDR Order No. R5-2003-0020. Groundwater New wells MW-4 and MW-5 were installed during the fall of 2006. The groundwater well network now consists of upgradient well MW-4 and downgradient wells MW-2R, MW-3, and MW-5. MW-1, which had previously been considered "upgradient" is now known to be crossgradient from the landfill, and not upgradient of either the landfill or another monitoring well. All monitoring wells are equipped with dedicated purge and sampling pumps. Groundwater samples are analyzed semiannually for the following field and monitoring parameters as specified in the WDRs: • Temperature • Chloride • Electrical Conductivity • Sulfate pH • Nitrate-Nitrogen • Turbidity • Calcium • Total Dissolved Solids • Magnesium • Potassium • Sodium • Carbonate Alkalinity • Bicarbonate Alkalinity • Volatile Organic Compounds (VOCs) • Groundwater samples are analyzed every 5 years for the following Constituents of Concern (CDCs): • Total Organic Carbon • Inorganics (dissolved) • VOCs (extended list) Foothill Sanitary Landfill 4 Department of Public Works/Solid Waste 2nd Semester and Annual 2008 Groundwater Monitoring County of San Joaquin—January 31,2009