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as little agitation as possible to reduce potential loss of volatile constituents. Major ions, TDS, and metalsses in non-preserved containers) ' Y C InUbe collected next followed by samples to be collected in preserved containers. Containers will be filled dizctty from the disposable bailer, immediately capped,and placed in a temperature-monitored iced chest. Caution will be used not to overfll bottles containing a pnservative. T=p=t= wiU be monitored by placing• a thermometer in the chest and checking to make sure that there is'sufftcient ice in the chest to maintain a temperitme of,approximately 4 degrees Celsius. The Laboratory will measure; docuiment, and report the temperature of the sample container upon arrival at the Laboratory.. The analytical Iaboratory places a total of 2 ml of nitric acid•in some of the I liter bottles to reduce the pH to below 2. 4n an aniiva! basis an extra preserved bottle will be filled with groundwater and-the pH measured in the bottle, It is' cel that the pH will be-below 2: If it is not the field techniciari will add.nitric acid in measured amounts until the pH is below 2. This added quantity of acid will be placed in all the prrzerved bottles.during the following monitoring rounds until it is checked again the follo - _.Samplc.pH--will-be_con{mrfted:at,the•.: laboratory and recorded- Deviations will be documented and reported by the laboratory: Samples:to be submitted for metals analysis filtered in the field. Filtering-will be performed using an in Line filter mechanism which-uses the pumping process of.the-dcdicaxed \� to draw - Pump water through the 4 micron-fiiter A new filter will be used at each well_ The new fidters will have a minimum of one filter volume of groundwater pressurized through them to- reducc adsorption effects. The actual liltered-sample.3vill not be collected-until a minimum. of two filter volumes of groundwater has been passed through 'the. filter. For without dodicated pumps, the samples are transferred from the bailer;through a filter apparatus, into the appropriate sample container. The filter apparatus consists of a Pr=11=vessel,a hand-operated pressin-c pump, and a filter cartridge. Water frrvm the bailer is placed in the Pressure vessel and enough air pressure(via the hand )is applied to force vnmex through the filter castddge into the sample bottles. The pzess= vessel is washed in conox, steam cleaned, and rinsed'with deicnized water betty=wells. A new filter cartridge is at each well_ pies will. be Labeled with a unique sample idendfication her, project i cation number,sample location,and date and time sampled- Samples will be transported to the contract laboratory under strict chain-of-custody procedures.. 23-483849-FOIX23A-9 I dR325July 14,2000 t&2000 KkkAddes,tae,