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2. Rinse the turbidity probe with deionized water then place in the standard solutign, ' <br /> 3. Adjust the meter for appropriate turbidity.scale then read the turbidity. <br /> 4. If required use the "c:ah'brate" adjustment on the meter to correct the instrurncn�,t to read <br /> the comet turbidity. - <br /> The calibration.process will be'recorded on a turbidity calibration log. A Sample Calibration <br /> Log is located in Appendix C Copies of calibration logs for each individual instrument arc kept <br /> in a binder at the office. The logs arc reviewed periodically top assess whether the instrument is <br /> becoming-more difficult to calibrate and therefore needs adjustment by the uranufaciurer, or if <br /> new probes are required. <br /> .Equipment Decontamination <br /> To reduce the potential for introducing contaminants or-,cross-contaao ima ing samples,.sampling <br /> equipment that is used repeatedly at diffemnt wells (in-line filW, meters) will be Welshed in a <br /> trisodivm•phosphate solution and triple rinsed with ddoni=d water prior to-use.in egch-well <br /> The monitoring wells are equipped with dedicated-sampling systems-vddch-.—wM not-r�egtiiir <br /> decontamination,. Sterile factory scaled disposable e- rs are used to collect the samples, Bailer <br /> cord is replaced between each well <br /> Monitoring Order - <br /> Groundwater monitoring will be conducted such-that depth to water m ee;xts and sgmpling <br /> is performed in the least contaminated wells fumt on historical results). M er#and <br /> sampling order wr71 tl=move from lesser'- to the most impacted wells. This is <br /> done to reduce the potential that wells and samples can be cross contariunated. G owadwater _ <br /> inorutoring order begins at MW-20 and then -I2 'ch aye the background wells.. The next <br /> wells,-listed in order, to be sampled are MW 15, -10, -1 and 3.. These was rarely contain <br /> evidence of chemical impacts. The last wells to be'sampled,listed in order,include MW-14,.-13 <br /> and '-2. ' .Proposed well 16 will be sampled in an ippropriate order depending on what _ <br /> constituents are detected(if any) in the well upon the: first SMVUn& Initially, MW-16 will-be <br /> the last,welt sampled. <br /> 234939-49.FOI 3I OR325 A-5 July t4,2000 <br /> Copyfkk 2WQ XkWe er,tw- <br />