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m Y <br /> Wd <br /> SOP 40 <br /> Procedure for sampling of soil/water for metallic parameters: <br /> 1. Containers <br /> A. For all metals except silver and mercury, in which normal <br /> -. storage is predicted, white translucent linear polyethylene <br /> bottles and caps, with a volume of approximately 250 ml, <br /> which have been approved and precleaned by G.T.Enviornmental <br /> Laboratories shall be used for sampling of water matrices. <br /> $. For samples that are to be analyzed for mercury, where the <br /> holding time (Lapsed time between date sampled and date <br /> analyzed) may exceed 14 days, 250 ml amber glass bottles <br /> fitted with TEFLON lined caps, that have been precleaned and <br /> supplied by G.T. Enviornmental Laboratories shall be used. <br /> C. For samples to be analyzed for silver, dark brown linear <br /> polyethylene, 250 ml bottles that have been precleaned and <br /> supplied by G.T.Enviornmental Laboratories, are prefered. <br /> However, 250 ml amber glass bottles or translucent linear <br /> ., polyethylene bottles, which have been properly precleaned and <br /> and supplied by G.T.Enviornmental Laboratories, may be uszd, <br /> provided each bottle is wrapped in two layers of aluminium <br /> foil, after the samples have been taken and labels applied. <br /> D. Soil samples may be taken using any of the containers and <br /> parameter dependent conditions as applied to water samples, <br /> with the difference that they should be of a wide-mouth type. <br /> Upon special request, samplers can be provided with plastic <br /> bags for soil samples taken in large numbers or remote <br /> locations, provided G.T.Enviornmental Laboratories in given <br /> 30 days notice of the intent to sample. <br /> - 2. Sampling A. General- All matrices, soil/water, should be <br /> sampled in duplicate. B. Water- Total metallic parameters a. <br /> Sampling by Submerging Container- The sample container is <br /> inverted and totally'submerged underwater, the container is <br /> turned upright and moved to create a current to displace the <br /> contents of the bottle and then capped while underwater. b. <br /> Sampling by Pouring- The sample container is filled to <br /> approximately 75% of capacity, with sample, capped, shaken <br /> and the sample discarded. The bottle is then refilled with <br /> sample to 80% of capacity (Around 200 ml for a 250 ml <br /> container) and capped, C. Water- Suspended metallic <br /> parameters After water samples have been obtained as for <br /> "Total metallic parameters", but before any preservation <br /> method has been applied, the sample should be filtered thru a <br /> membrane-retained--in-a-disposable_plas.ti T T <br /> filtration assemble, assisted by a vacume. The filtrato (The <br /> liquid which passes thru the filter) is discarded (Unless <br /> "Dissolved metallic parameters" are required, then it shall <br /> 1 be retained, as in "D. ") . The entire filter apparatus is <br /> platted in a "zip-lok" plastic bag and sent to <br /> G.T.Enviornmental Laboratories for analysis for "Suspended <br /> Metals" of the desired metallic parameters. D. Water <br /> Dissolved metallic parameters After water samples are <br />