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2, Rinse the turbidity probe with deionized water then place in the standard solution ' <br /> i 3. Adjust Adj <br /> 1 the meter for appropnatc turbidity.scale then read the turbidity. <br /> 4. If required use the "calibrate" adjustment on the meta to correct the instrument to read <br /> the correct turbidity. <br /> The calibration.process will be recorded on a turbidity calibration log. A Sample Calibration <br /> Log is located in Appendix G. Copies of calibration logs for each individual instrument are 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 adjusilnent by the manufacturer, or if <br /> new probes are required. <br /> .Equipment Decontamination <br /> To reduce the potential for introducing contaminants or cross-co aminatingSampl samling <br /> equipment than is used repeatedly at different w (m-line filter, .meters) vAH be washed in a <br /> trisodium,phosphate solution and triple rinsed with dcionized water prior to-use.in each-Wen_ <br /> —' The monitoring wells are equipped with dedicated-sampling-systems-which-:wi11 not-rcgtidre <br /> ® decontamination. Sterile factory sealed disposable bailers 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 d<pth to waxer measurements and sampling <br /> is performed in the least contaminated wells first QxL5cd on historical results). Measurement and <br /> sampling aider wt�l then move from lesser', to the.mast impacted weIIs. this is <br /> done to reduce the potential that wells and samples can be cross contaminated. Cirocnndwater <br /> monitoring order begins at MW-20 and thea MW-12-which are the background wells.. The nerd <br /> we1h%'listed in order, to be sanded tiro MW-15, -10, -1 and -3-- These wells rarely contain <br /> evidence of chemical impacts. The last wells to be" pled,listed in order,include MW-14,43 <br /> and '4.. Proposed well 16 will be sampled in an appropriate order depending on what _ <br /> constituents arc detected(if any) in the well upon the first sampling. initially, MW--16 will-be <br /> the last.well sampled. w <br /> 23-4838494,01M IOR325 A-5 hely 14,2040 <br /> coffrWW 2000 KkWd4a,Jw_ <br />