ARCHIVED REPORTS_2012_3 - Laserfiche WebLink

Home Browse Search

.as little agitation as possible to reduce potential loss of volatile constituents. Major' ions, TDS, 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 sable bailer immediate) p YP and 1 in a temperature-monitored i cbct. Cazttion will be used not to overfill bottles contadning a p live. Temp=ture will be monitored by Plac%ngdienna omcter in the chest and ch ; g to make sure that there is'suffcient ice in the chest to maiatain a temperature of appro ' cly 4 degr= Cclsius. The laborato ry WM measurei doctimimt, and report the temperature of the sample container upon arrival at the laboratory.. The analytical laboratory 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 that the pH will be belovt 2: if it is not the field technician will add nitric acid in measuz d amounts until the pH is below 2. This Added quantity of acid will be placed in all the preserved bottles-during the following monitoring rounds until it is checked again the fallowing-year_;Samplezpbl will_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 perforzued using an in line filter echanism which uses the- Process-of.the-dc&c2ted ' to w - - .pump draw water through the 4 micron'filter-_ A.new filtcr will be used at each well_ Tire new fihers will have a minimun of one filter volume of groundwater pressurized through them to reduce adsorption efforts. Tho actual fiheied_sample.will not be collected-until a m blimum of two filter volumes of groundwater has been passed through the filter. For wells without dedicated pumps, the samples are transferred from the bider,through a filtcr agpazatus, into the apprropraatc sample container_ The filter appmatus consists of a pressure vessel, a hand-operated - press= Pump, and a fidter-cartridge, Water from the bailer is placed in the pressum vessel and ,enough air pressum(via the hand pump)is applied to force water thmugh the filter cartridge unto the sample bottles_ The pressure vessel is washed in Alconox, steam cleaned, and iinsed'witla deionized water between wells_ A new fiber cartridge is used at each well_ Simples willbe Libeled with a unique sample identification number, project identification number, sample location, and date and time sampled. Samples will be transported to the contract story under strict chain-of-custody ores__ - 83944-FO I W I OR325 A-9 July 14,2000 2000 Kkiafad*4 Ilse,