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2. Rinse the turbidity probe with 4cionized water then place in the standard solution, 3. Adjust the meter for appropriate turbidity.sWe then react the turbidity. 4. If required use the "calibrate" adjustment on the meter to correct the instrument to read the cmect turbidity. - The calibration process will be recorded on a turbidity calibration log. A Sample Calibration Log is located in Appendix C. Copies of calibration logs for eacb individual instrument are kept in a binder at the office. The Iogs are reviewed periodically top assess whether the instrument is becoming-more difficult to calibrate and therefore needs aTlustment by the nsanufacier, or if new probes are required. Equipment Decontamination To raducae the potential for introducing contarinmts or-cross-contaminating samples,sampling equipment that is used repeatedly at dillerent wells (wi line filter, meters) will be washed in a t3zsaditmn phosphate solution and triple rinsed with deign water prior to•use in each-wc1L The monitoring wells are equipped with dedicated-sanipling systeu=vddc:h-:will not-regtiirc A � decontamination, Sterile factory sealed disposable ers are used to ceolfax the samples. Bailer cord is replaced between each welL M®nitoring Order ' ' e - GrOUndwater monitoring will be conducted such.that depth to water measaremcats and sampling is performed in the least contaminated wells first on histone l results). Measurement and sampling order will then move from lesser". to the most kpwted wells. This is done to reduce the potential that wells and samples can be cross conrminatad Ciroundwater mox0toring order bq*at MW-20 and then MW-12,which are the background weiis.. The nit wr,1134Iisted in ceder, to be sampled ata MW-15, -10, -1 and 3.. These wells rarely contain evidence of chemical impacts. The last wefts to be' pled.,listed in order,include MW14,-13 and '-Z ' Proposed well 16 will be sampled inan " to order depending on what constitueuuts arc detected(f any) in the well upon the first sampEng. Initially, MW--16 will be the last,well sampled. *493949L-FOIA23 IOR325 A-S .tiny 14,2Q40 • ZOQO lCkie�lCldcr,tae.