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2. Rinse the turbidity probe with deionized water then place in the standard solution <br /> `i 3. <br /> Adjust the meter for appropriate turbidity.scale then read the turbidity. <br /> 4. If required use the "calibrate" adjustmen€on the meter to correct the instrument to read <br /> the comxt turbidity. <br /> The calibration.process will be'recorded on a turbidity calihradon log. A Sample Calibration <br /> i,og is located in Appendix Cr Copies of calibration logs for each individual instilment are kept <br /> in a binder at the office. The logs are reviewed periodically top assess whether the instrument is <br /> becoming-more difficult to calibrate and therefore needs adjustment by the manufacturer, or if <br /> new probes are required. <br /> .Equipment Decontamination <br /> To reduce the potential for introducing contaminants or cross-contaminating samples,sampling <br /> equipment that is used repeatedly at different wells (in-line filtar, meters) will be washed in a <br /> trisOdium'pliosl hate solution and triple rinsed with deioniwd water prior to-use-in each-weiL-. <br /> =-� The monitoring wells are equipped with dedicated-sampling-syst=m which:-will not-rcgtiirc <br /> decontanxinatiom 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 depth to water mea:=emcnts and sampling <br /> is performed is the least contaminated wells first(based on historical results)_ Measuu-em_ ent and <br /> sampling order will then move from lesser impacted wells to the most impacted wellss. This is <br /> done to reduce the potential that wells and samples can be cross contauainated. Groundwater <br /> taotdtoring order begins at MW 20 and then MW-12 c'h are the background wells. The next <br /> we11s, listed yin order, to be sampled ora MW-15, -10, -1 and -3_. These -wells rarely contain <br /> tAdcnce of cle=rical-impacts. The last wells to be sampled,listed in ardor,include MW-1 4,43 <br /> Md �_2, proposed well 16 will be sampled in an apprrspriate order depending on what _ <br /> constituents are detected(if any) in the well upon the first sampling. Initially, MW 16 will-be <br /> the 1ast,well sampled. <br /> 1 <br /> 23483849-POM3JOR325 A-s July 14,2000 <br /> 2000 xt«eerada,1tw- <br />