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2. Rinse the turbidity probe with deioaind water then place in the standai d solution. <br /> 3. Adjust the meter for appropriatd turbidity.scale then rad the turbidity. <br /> 4. If required use the "calibrate" adjustment on the meter to correct the xnsuvme4t to read <br /> the correct turbidity. - <br /> Tba calibration.process will be recorded on a turbidity calr'bration log. A Sample Calriination <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 am reviewed periodically top assess whether the instzumcnt is <br /> becoming-more difficult to calibrate and therefore needs adj-wtmcnt by the manufactnrer, or if <br /> new probes arc required. <br /> Equipment Decontamination <br /> { <br /> To reduce the potential for introducing contaminants or-crass-contaminating samples,sampling <br /> equipment that is used repeatedly at different wells (u -line fitter.,met=) willbe vs►fished in a <br /> trisadltun.phospbate solution and triple rinsed with ddon'i=d water prior to.use'is each-welL- g <br /> The monitoring wells are equipped with dedicated-sampling-systems-which-.will not-squire � <br /> &contamination. Sterile factory sealed disposablettiailers are used to coil< the samples, Bailer <br /> cord is replaced between each well <br /> t <br /> 7 <br /> Monitoring Order <br /> Groundwater monitoring will be conducted such that depth to water n1 cuts and sampling <br /> is performed in the least contaminated yells fust on historical resrths). Measurement and <br /> sampling order will then,move from lesser impacted, wills to the most Impacted wells. This is <br /> done to the potential that wells and samples can be cross contaminated, Groundwater <br /> monitoring order begins at MW-20 and then -12-which are the backgtoundwells. The next <br /> Wells.'listcd in order, to be sampled are MW-13, -10, -1 and 3.. These wells 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 appropriate order depending on what _ <br /> cOnstituentS are detected(,-if any) in the well upon the first.sampling. Initially, MW-16 will-bee <br /> the last,well sampled <br /> 23-483844-F01t7310R325 A-5 Arty 14,2000 <br />