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MONITORING AND REPORTING PROGRAM NO. R5-2010-0016 -19- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS NORTH COUNTY LANDFILL SAN JOAQUIN COUNTY <br /> <br /> <br /> <br /> INORGANIC CONSTITUENTS OF CONCERN (COCs), APPROVED USEPA ANALYTICAL METHODS, & CONCENTRATION LIMITS <br />Table G.1 <br />Concentration Limit1 <br />Constituent USEPA Test <br />Method Unsaturated Zone Ground-water Surface Water3 <br />Field Parameters Elevation, Ft. MSL ---- n/a ---- n/a pH, pH units 150.1 or meter ---- ≥6, ≤8 ---- Temperature, OC, OF ---- ---- ---- ---- Turbidity, NTU ---- ---- 18 209 Dissolved Oxygen 360.1 or meter ---- ---- ---- Oxidation-Reduction (Redox) Potential, mv ---- ---- ---- n/a <br />Specific conductance, µMhos/cm 120.1 or meter ---- 450 695 <br />General Minerals, mg/L Total Dissolved Solids (TDS) 2540C ---- 300 468 Total Alkalinity 2320B ---- 1652 334 Total Hardness 2340B ---- ---- ---- Chemical Oxygen Demand (COD)410.4 ---- ---- 565 Major Anions Bicarbonate 2310B ---- 130 ---- Chloride 300 ---- 40 61 Nitrate – Nitrogen 300 ---- 4 10 Sulfate 300 ---- 31 69 Major Cations Calcium 200.7/6010 ---- 31 ---- Magnesium 200.7/6010 ---- 23 ---- Potassium 200.7/6010 ---- 7 ---- Sodium 200.7/6010 ---- 31 ---- <br />Dissolved Metals, µg/L5 Aluminum 200.7/6010 ---- 2102 3,050 Antimony 200.7/6010 ---- PQL ---- Arsenic 200.9/200.8 ---- PQL ---- Barium 200.7/6010 ---- 902 254 Beryllium 200.7/6010 ---- PQL ---- Boron 200.7/6010 ---- 1702 ---- Cadmium 200.7/6010 ---- PQL ----