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�. .9. _-�•. -::_- sr-� S - •�* _ ��' .. 1-1 <br /> � '�'az V t .:r.,.., u;a mac. <br /> ° i -- Y C55i - _ <br /> r ° a a` rrikgf^ t' f:A" ,+ •"'v�Zcriie'�+wr:G <br /> s <br /> s <br /> mr,Environmental CoMultw[ts, Inc. <br /> Sampling Protocol <br /> Page: 4 <br /> i <br /> fab. This travel blank should be listed on tha Chain of Custody but will be <br /> analyzed only if all samples contain the same contaminants. <br /> equipment including tite pump, bailer, and cables, used by <br /> All sampling <br /> sampling personnel, ant <br /> will be disassembled, if appropriate, <br /> ling followed <br /> prior to commencement of sampling. These procedures wili <br /> between each well, sampling point, and at the end of the sampling day. De- <br /> ionized or organic-free water (also provided by the laboratory) will then be <br /> introduced into the pump or bailer as a final stage of cleaning. This water will <br /> then be pumped or gently poured into sample vials to be used as pump or bailer <br /> blanks. These blanks will be tested only if their corresponding samples are <br /> found to contain contaminants. <br /> Immediately prior to sampling, water levels and well depth measurements will <br /> be taken in all wells at the site. Each well will be evacuated using a stainless <br /> steel bladder pump, which does not introduce air into the water column, or a <br /> Teflon bailer. The PH, temperature, and electrical conductivity of the water <br /> will be monitored as the well is evacuated. These parameters will be noted on a <br /> field log. Instruments calibrated to known standards will be used to monitor <br /> these parameters. At least 5 well volumes will be evacuated frons each well, <br /> and more, if necessary, until the above parameters have stabilized. Wells that <br /> are de-watered before evacuation of 5 well volumes has been accomplished will <br /> be sampled upon 80 percent recovery of the initial water level. The wells or <br /> other sampling points will be sampled in order of the le<1st to the most <br /> contaminated, as best known or estimated. The samples will be pumped from a <br /> stainless steel bladder pump or carefully poured from a Teflon bailer into clean <br /> glass vials with TeCion-lined screw caps and half gallon plastic containers <br /> provided by the laboratory. Care will be taken to ensure that no air space exists <br /> in the vials by inverting to check for bubbles and re-sampling if necessary. The <br /> samples will be analyzed or extracted within 14 days according to their EPA <br /> methods. Water samples collected for analysis will be analyzed by L'-PA method <br /> 602 for purgeable aromatics and halocarbons, and total petroleum ltiydrocarbons, <br /> as referenced in Solid Waste Method SW 846. <br />