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C7 <br />WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2010-0016 <br />SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS <br />NORTH COUNTY LANDFILL <br />SAN JOAQUIN COUNTY <br />VOCs, pg/L <br />Carbon Disulfide <br /><.5 <br />5.1 <br />1,2-Dichloroethane <br /><.5 <br />3.9 <br />Trichlorofluoromethane <br /><.5 <br />1.5 <br />1,1,1 -Trichloroethane <br /><.5 <br />1.9 <br />Trichloroethene <br /><.5 <br />0.6 <br />Tetrachloroethene <br /><.5 <br />1.1 <br />1. Similar constituents and elevated concentrations also detected in VZs-2 and 4. <br />-7- <br />Neither the background nor any of the detection lysimeters have produced a <br />sufficient amount of liquid for sampling since 2003. VZ -3 has been dry since April <br />2000. Provision G.8.b requires that Discharger investigate all lysimeters at the site <br />and submit a status report as to their condition, including plans for repair or <br />replacement, as necessary. <br />31. The quality of liquid detected in the leachate collection sumps of the landfill <br />modules during the First Half 2008 was as follows: <br />Leachate Monitoring Results, First Half 2008 <br />Constituent Concentration <br />Module 1 Module 3 Module 4 <br />General Minerals, mg/L <br />Chloride <br />Bicarbonate Alkalinity <br />TDS <br />VOCs, pg/L1 <br />Acetone <br />Benzene <br />1,1-Dichloroethane <br />1,2-Dichloroethane <br />1,4 -Dichlorobenzene <br />Cis-1.2-DCE <br />MTBE <br />Tert-Butyl Alcohol <br />Vinyl Chloride <br />590 <br />500 <br />260 <br />790 <br />730 <br />1,100 <br />2,400 <br />2,100 <br />1,600 <br />31 <br />14 <br />20 <br />0.68 <br />< 0.4 <br />8.8 <br />1.1 <br />0.91 <br />2.9 <br />1.4 <br />1.6 <br />4.3 <br />3.4 <br />3.0 <br />2.4 <br />1.6 <br />0.78 <br />2.9 <br />8 <br />11 <br />50 <br />220 <br />150 <br />110 <br />3.0 <br />2.9 <br />19 <br />Listing includes most, but not all, VOCs detected in the module sumps during the monitoring <br />period. <br />MRP Section D requires that the discharger monitor leachate semiannually for <br />the above leachate monitoring parameters. <br />