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as little agitation as possible to reduce potential loss of volatile constituents. Major ions, 7DS, and metals analyses (in non-preserved containers) will be collected next followed by samples to be collected in preserved containers. Containers will be filled directly from the disposable bailer, immediately capped, and placed in a temperature-monitored iced chest. Caution will be Used not to overfill bottles containing a pfeservative. Temperature will be monitored by placmg* a thermometer in the chest and checking to make sure that there is'sufficientin he IC.e chest to maintain a temperature of approximately 4 degrees Celsius. The 'lab-oratory will measure, document, and report the temperature of the sample container upon arrival at the laboratory.. The analytical laboratory places a total of 2 ml of nitric add-in some of the I liter bottles to reduce the pH to below. 2. On an annual basis an extra preserved bottle will be .filled with groundwater and-the pH measured in the bottle. It is'assumed that the PH will be-below 2; If it is not the field technician will add nitric acid in measured amounts until the pH is below 2. This added quantity of acid will be placed in all the preserved bottics.durin.9 the following m . onitoring rounds until it is checked again the following-y!:ar-Sample:-pH--vvilI"- be-confirmed:at:the,_: laboratory and recorded- Deviations will be documented and reported by the laboratory_ Samples;to be submitted for metals analysis-will. be filtered in the field- Filtering-will be performed using an in Eric filter mechanism which uses the-pumping ' - c process-of. he dedicated pumpto draw water through the 4 micron filter-_ A new filter will be used at each well. The new , filters -will have a minimum of one filter volume of groundwater pressurized through them to- reduce adsorption effects. The actual filtered-sample.will not be collected.until a minimum of two filter volumes of groundwater has been passed through the filter. For wells without dedicated pumps, the samples are transferred from the bailer,through a filter apparatus,. into the appropriate sample container- The filter apparatus consists of a pressure vessel, a hand-operated. pressure pump, and a filter cartridge- Water from the bailer is placed in the pressure -vessel and enough air pressure(via the hand pump)is applied to force water through the Meer cartridge into the sample bottles. The pressure vessel is washed in Alconox, steam cleaned, and rinsed with deicnized water between wells. A new Mter cartridge is used at each well. Simples will be labeled with a unique sample identification number, project identification number, sample location, and date and time sampled. Samples will be transported to the contract Laboratory under strict chain-of-custody procedures- ' 023483 949-FO I W I OR325 A-9 July 14,2004 CMY4�ht 2000 KkWcldcr,la,_