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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2010-0016 -7- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS NORTH COUNTY LANDFILL SAN JOAQUIN COUNTY <br /> <br /> VOCs, µg/L Carbon Disulfide <.5 5.1 1,2-Dichloroethane <.5 3.9 Trichlorofluoromethane <.5 1.5 1,1,1-Trichloroethane <.5 1.9 Trichloroethene <.5 0.6 Tetrachloroethene <.5 1.1 _____________________________ 1. Similar constituents and elevated concentrations also detected in VZs-2 and 4. Neither the background nor any of the detection lysimeters have produced a sufficient amount of liquid for sampling since 2003. VZ-3 has been dry since April 2000. Provision G.8.b requires that Discharger investigate all lysimeters at the site and submit a status report as to their condition, including plans for repair or replacement, as necessary. 31. The quality of liquid detected in the leachate collection sumps of the landfill modules during the First Half 2008 was as follows: Leachate Monitoring Results, First Half 2008 <br />Constituent Concentration Module 1 Module 3 Module 4 General Minerals, mg/L Chloride 590 500 260 Bicarbonate Alkalinity 790 730 1,100 TDS 2,400 2,100 1,600 VOCs, µg/L1 Acetone 31 14 20 Benzene 0.68 < 0.4 8.8 1,1-Dichloroethane 1.1 0.91 2.9 1,2-Dichloroethane 1.4 1.6 4.3 1,4-Dichlorobenzene 3.4 3.0 2.4 Cis-1,2-DCE 1.6 0.78 2.9 MTBE 8 11 50 Tert-Butyl Alcohol 220 150 110 Vinyl Chloride 3.0 2.9 19 _____________________________ 1. Listing includes most, but not all, VOCs detected in the module sumps during the monitoring period. MRP Section D requires that the discharger monitor leachate semiannually for the above leachate monitoring parameters. <br />