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TABLE 3 <br /> LABORATORY ANALYTICAL METHODS AND FIELD PARAMETERS <br /> 2012 SEMIANNUAL GROUNDWATER MONITORING REPORT <br /> FORMER MARLEY COOLING TOWER SITE <br /> STOCKTON,CALIFORNIA <br /> Analytes Test Method <br /> Container Type Preservation Maximum Holding Maximum <br /> and Size Time Detection Limit <br /> Laboratory Analytical Methods <br /> 0.45-micron laboratory filter; <br /> EPA 6010B/EPA 6 months after <br /> Chromium(Dissolved Total) 6020 preservation 500-mL poly followed by HNO3 to 5 µg/L <br /> pH<2;4 degrees C <br /> Hexavalent Chromium EPA 7199/EPA 500-mL poly 4 degrees C 24 hours 5 µg/L <br /> 7196A <br /> Metals(Dissolved Total)-Arsenic(As), EPA 200.8/EPA 0.45-micron laboratory filter; 6 months after As-5 µg/L, <br /> 500-mL poly followed by HNO3 to Fe-20µg/L,, <br /> Iron(Fe),Manganese(Mn) 6020 preservation <br /> pH<2;4 degrees C Mn-2 µg/L <br /> Sulfate(SO4) EPA 300.0 500-mL poly 4 degrees C SO4 28 days 0.5 mg/L <br /> Total Dissolved Solids(TDS) EPA 160.1 500-mL poly 4 degrees C 7 days 10 mg/L <br /> Total Organic Carbon(TOC) EPA 415.1 SM5310C 250-mL poly H2SO4 to pH<2;4 degrees C 6 months 2 mg/L <br /> Field Parameters <br /> Dissolved Oxygen(DO) Field Meter NA NA NA NA <br /> Oxidation/Reduction Potential(ORP) Field Meter NA NA NA NA <br /> pH Field Meter NA NA NA NA <br /> Electrical Conductivity(EC) Field Meter NA NA NA NA <br /> Water Level Field Meter NA NA NA NA <br /> Notes: <br /> <-less than <br /> µg/L-microgram per liter <br /> C-Celsius <br /> EPA-U.S.Environmental Protection Agency <br /> HNO3-nitric acid <br /> H2SO4-sulfuric acid <br /> mg/L-milligram per liter <br /> mL-milliliter <br /> NA-not applicable <br />