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5.0 ANALYTICAL REQUIREMENTS <br /> 5.1 FIELD ANALYSES <br /> A separate sample container will be used for the field measurement of <br /> temperatures, pH, and specific conductivity to minimize cross- <br /> contamination. The measurements will be taken immediately after the water <br /> is collected and in accordance with the guidelines of Section 4 .3.2.1 of <br /> the Current Work Plan. <br /> 5.2 LABORATORY ANAYLSES <br /> All samples will be collected, preserved, handled, and analyzed for total <br /> and dissolved concentrations of arsenic, total chromium, hexavalent <br /> chromium, copper, and zinc in accordance with EPA's "Test Methods for <br /> Evaluating Solid Waste" (EPA SW-846) as listed below. <br /> Constituent Analytical Method <br /> Arsenic EPA SW-846 #7060 <br /> Chromium, Total EPA SW-846 #6010 <br /> Chromium VI EPA SW-846 17195 <br /> Copper EPA SW-846 #6010 <br /> Zinc EPA SW-846 #6010 <br /> For the analytical results to be most useful, they must be able to be <br /> compared to the applicable requirements for the constituents of concern. <br /> The analytical method detection limits need to be at least as low as the <br /> effluent limits specified by the NPDES permit. Therefore, the following <br /> maximum detection limits to be used will be as follows: <br /> Contaminant Detection Limit <br /> Arsenic 10.0 ug/l <br /> Chromium, Total 50.0 ug/1 <br /> Chromium VI 11.0 ug/l <br /> Copper 6.5 ug/l <br /> Note that zinc effluent limits have not been specified by the NPDES permit <br /> because zinc has not been used as a wood treating chemical. Therefore, the <br /> industry standard detection limit of 10.0 ug/l for zinc will be used to <br /> analyze the storm water samples. <br /> 4 <br />