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1 <br />1 <br />t <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />N;lMiscellaneouslGroundwaterInfo, -All Sltes1SAP AppendlxA.doc <br />Groundwater Monitoring A•10 Department of Public WDrkslSolld Waste <br />County of San Joaquin <br />Table A-2 <br />t <br />Analytical Test Methods and Sample Holding Times <br />i <br />r <br />Parameter Matrix' Test Method <br />Holding Time <br />Volatile Organic 8260H or 601 Series <br />14 days <br />Compounds <br />Metals <br />6000 and 7000 <br />6 months' <br />Series <br />Hexavalent Chromium <br />7199 <br />24 hours <br />Alkalinity (carbonate, <br />310.1 <br />14 days <br />!!E{ <br />bicarbonate total) <br />l <br />Chemical Oxygen Demand <br />410.2 <br />28 days <br />Y <br />; <br />= <br />Chloride <br />300. <br />28 days <br />1 <br />Nitrate+nitrite as Nitrogen <br />353.2 <br />14 days <br />Sulfate <br />300 <br />28 days <br />Sulfide <br />903013 <br />7 days <br />Total Dissolved Solids <br />160.1= <br />7 days <br />� <br />Total Organic Carbon <br />415.1 <br />28 days <br />1 <br />Semi -volatile organic <br />8270 <br />7 days to extraction <br />compounds <br />I <br />Organophosphorous <br />8141 <br />7 days to extraction <br />compounds <br />Chlorophenoxy Herbicides <br />81SIA <br />7 days to extraction <br />Cyanide <br />9010B <br />14 days <br />j <br />Oil and Grease <br />413.2 <br />28 days <br />! <br />j <br />' Metals analyzed by ICP (USEPA Method 6010), with the exception of antimony <br />(USEPA Method 7041), arsenic <br />(USEPA Method 7062), cadmium (USEPA Method 7131A), lead (USEPA Method 7421), mercury (USEPA Method <br />7470A), nickel (USEPA Method 7521), selenium (USEPA Method 7742), and thallium (USEPA Method 7541). <br />b Holding (ime for all metals is 6 months, with the exception of mercury (28 days). <br />N;lMiscellaneouslGroundwaterInfo, -All Sltes1SAP AppendlxA.doc <br />Groundwater Monitoring A•10 Department of Public WDrkslSolld Waste <br />County of San Joaquin <br />