ARCHIVED REPORTS_2007_5 - Laserfiche WebLink

Home Browse Search

-as little agitation as possibk to reducd potential loss of volatile constituents. Major ions, TDS, and metals analyses (In non-preserved containers) will be collected nem followed by be collected in preserved containers. Containers will be filled directly�m samples to the disposable bailer, immediately capped,and placed in a temperature-monitored iced chest. Caution win be used not to overfill bottles containing a preservative. Temperature will be monitored by placing-a thenuometer in the chest and checking to make sure that there is-sufficient ice in the chest to maintaina emperature of rwdmatol 4 . tY . degrees Celsius. The Iaboratary will measure; doctiinent, and report the temperature of thesample container upon arrival at the laboraxory.. The analytical Iaboratory places a total of 2 ml of nitric acid in some of the 1 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 tbat 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 bottles.during the fallowing monitoring rounds until it is checked again the following-year_;Sample_--pH--will-be_confzated:at.lire-: laboratory and recorded. Deviations will be documented and reported by the laboratory, Samples;-to be submitted for metals analysis-will. be filtered in the 5cld- Filtering-Will be performed using an in line filter mechanism which uses the-pumping process-of the-dedicated ° pump to 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 prcssufiz;�d through them to- reduce adsorption effects_ The actual filtered-sarnpleavdl 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 frum.the bailer,through a filter apparatus, into the appropriates sample container_ The filter apparatus consists of a pressUre vel,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 filter cartridge into the sample bottles_ The pressure vessel is washed in Alconox, steam cleaned, and xinsed'with ,deianize d.water between wells_ A new fiber cartridge is used at each well. Samples willbe labeled with a unique sample identification number, project identWcation number,sample location,and date and time sampled. Samples will be transported to the contract laboratory under strict chain-of-custody procedures._ 23-483849-FO I L23 I OR325 A-9 July 14,2(?O4 2000 KkWd&4 lac.