ARCHIVED REPORTS_2006_3 - Laserfiche WebLink

Home Browse Search

2. Rinse the turbidity probe with deionized water then place in the standard solution. 3. Adjust the meter for appropriate turbidity,scalc then read the turbidity. 4. If required use the "calibrate" adjustment on the meter to correct the instrument to read the correct 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 each individual instrument are kept in a binder at the office. The logs are reviewed periodically top assess whether the instrument is becoming more difficult to c lalibraxe and therefore needs adjustment by the manufacturer, ®r if new probes are required. Equipment Decontamination To reduce the potential for introducing contaminants or cross-contaminating samples, sampling equipment that is used repeatedly, at different wells (m-line filter, meters) wip be washed in a trisodium.phosphate solution and triple rinsed with deioni=d water prior to-use.in each-welL-. The monitoring wells arc equipped with dedicated-sampling-systems which.:-will not- require decontamination. Sterile factory sealed disposable bailers are used to collect the samples_ Bailer cord is replaced between each well. Monitoring Order Groundwater monitoring will be conducted such that depth to water measurements and sampling is performed in the least contaminated wells first(based on historical results). Measurement and sampling order will then move from lessor '- *wells to the most impacted wells., This is done to reduce the potential that wells and samples can be cross contaminated. Groundwater monitoring order begins at MW 20 and then MW 12 which are the background wells. The next wells,'listed in order, to be sampled arc MW-15, -10, -1 and -3.. These wells rarely contain evidence of chemical impacts. The last wells to be-sampled, listed in order, include -14,.-13 and -2. - Proposed well 16 will be sainpled in an appropriate order depending on what constituents are detected (if any) in tfie well upon the first sampling. Initially, MW-16 will-be the last,well sampled. s Z493949401\2310323A duly 14,2404 2W KkWC1&r'1W_