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Ground Water Sampling <br /> STable 2 Sampling and preservation requirements round-water les <br /> 9 P <br /> LParameter Container Preservation e anon Holding Time No of Samples <br /> & Minimum <br /> Volume (ml) <br /> Acidity P,G Cool,4" C 14 days 100 <br />' Alkalinity P,G Cool,4"C 14 days 100 <br /> Ammonia P,G Cool,4" C 28 days 1000 <br /> H2SO4to pH <2 <br /> Asbestos P Cool,4" C 48 hours 1000 <br /> PH P,G Determine on site 2 hours 50 <br /> Radioactivity P,G HNO3,to pH <2 6 months 1 gallon <br />' TOX Amber G-V Cool,4" C 7 days 3x 100 <br /> 1mI0IM <br /> Na2SO4,HNO3, <br /> topHa2 <br /> TOC P,G Cool,4" C 28 days 100 <br /> Chloride P,G None 28 days 100 <br /> . Cyanide P,G NaOH to pH> 12 14 days 1000 <br /> Fluoride P,G None 12 8 days 500 <br /> Nitrate P,G Cool,4" C 48 hours 500 <br /> Oxygen(1801160) P,G,G-V None 6 months 4o <br />' Hydrogen(2H/3H) P,G,G V None 6 months 40 <br /> Nitrogen(15N/14N) P,G Cool,4°C 28 days 1000 <br />' Sulfate P,G Cool,4" C 28 days 200 <br /> Sulfide P G Cool,4" C 7 days 1000 <br /> 2 ml zinc acetate <br /> NaOH to pH > 9 <br /> ChromiumVI P,G Cool,4" C 24 hours 500 <br /> Dissolved Metals P,G Filter on site 6 months(except Hg- 1000 <br /> (except Cr VI) HNO, to pH<2 28 days) <br />' Total Metals P,G HNO�,to pH <2 1 6 months(except Hg- 1000 <br /> 28 days) <br /> Extractable G Cool,4" C 7 days to extraction, 1000 <br /> Organics analysis 40 days after <br /> (EPA 8270) extraction <br />' 19 <br />