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i <br /> Table A-2 <br /> Analytical Test Methods and Sample Holding Times <br /> Parameter Matrix' Test Method Holding Time <br /> Volatile Organic 82608 or 601 Series 14 days <br /> Compounds <br /> Metals 6000 and 7000 6 months° <br /> Series <br /> HexaYrdent Chromium 7199 24 hours <br /> t i <br /> Alkalinity(carbonate, 310.1 14 days j <br /> bicarbonate total) <br /> i <br /> Chemical Oxygen Demand 410.2 28 days <br /> Chloride 300. 28 days 1 <br /> Nitrate+nitritc as Nitrogen 353.2 14 days <br /> Sulfate 300 28 days <br /> Sulfide 9030B 7 days <br /> Total Dissolved Solids 160.1 7 days <br /> Total Organic Carbon 415.1 28 days <br /> Semi-volatile organic 8270 7 days to extraction <br /> compounds <br /> Organophosphorous 8141 7 days to extraction l <br /> compounds <br /> Chlorophenoxy Herbicides 9151A 7 days to extraction <br /> Cyanide 9010B 14 days <br /> S <br /> Oil and Grease 413.2 28 days i <br /> 'Metats analyzed age ICP(USEPA Method 6010),with the exception of antimony(USEPA Metfwd 7041),arsenic <br /> (USEPA Mcdwd 7062),cadmium(USEPA Method 7131 Al lead(USEPA Method 7421),mercury(USEPA Method � <br /> 7470A�nickel(USEPA Method 7521).selenium(USEPA Method 77421 and thallium(USEPA Method 7841). <br /> °Holding time for all metals is 6 moolhs,with the exception of mercury(28 days). <br /> I <br /> I <br /> N:\hlisce0aneous%Groundwater Info-AN StieslSAP_Appendixkdoc i <br /> i <br /> 4 <br /> i <br /> Groundwater Monitoring A-10 Department of P"iic WorWSotkf Waste <br /> county of San Joaquin <br /> r <br />