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Ryegrass Limited Purpose Landfill and Balefill Closed Landfill <br />Groundwater and Leachate Sampling and Analysis Plan <br />Kittitas County Solid Waste <br />Groundwater Monitoring Procedures Checklist <br />Two Weeks Prior to Sampling Event <br />17. Check equipment and sampling kits two weeks before schedule sampling. <br />6. Does the kit contain everything on the checklist? If not, order or purchase. <br />7. Are pH buffers or conductivity standard past their expiration date? If so, order new <br />solution. <br />8. Is pH fill solution within one inch of fill hole? If not, add KCI. <br />9. Go through calibration (Step 3) and correct any problems if a probe will not calibrate <br />properly. <br />10. Make sure all other equipment is operating properly. <br />One Week Prior to Sampling Event <br />1. Order sample containers from laboratory. See Appendbc C for Sample Container Request <br />Forms. <br />Day of Sampling <br />1. Calibrate pH/Conductivity Meter (instructions provided for Oakton; manual provided in <br />Appendix B). <br />a. Rinse pH probe with DI water, insert into pH 7 solution, and press "cal". <br />b. When readout goes to 7.00, rinse again, insert into pH 4 solution, and press "cal" again. <br />c. When readout goes to 4.00, rinse tip thoroughly, replace rubber cap filled with pH 10 <br />buffer, and press "cal" again. <br />d. When readout goes to 10.00, rinse tip thoroughly, replace rubber cap filled with pH 7 <br />buffer, and slide rubber sleeve to cover vent hole. <br />e. Attach conductivity probe to meter and press "cal". <br />f. When readout goes to zero, insert probe into 1413 Nmhos/cm conductivity standard, <br />making sure the silver bands are covered without air bubbles in the sleeve, and press <br />"cal" again. Note: don't puce probe directly into large supply botfie because you may <br />contaminate It Just pour what you need Into a smaller container and cue the large <br />bottle Immediately. <br />g. When readout stabilizes at 1413 Nmhos/cm, remove sleeve and rinse probe and sleeve <br />with DI water. <br />h. Press "mode" twice to turn off meter. <br />2. Measure static water level. See Standard Operating Procedure StM Water Level Monitoring. <br />3. Purge well. See Standard Operating Procedure Groundwater Sampling and Low Flow <br />Groundwater Puriong and Sampling. <br />4. Collect groundwater samples. See Standard Operating Procedure Groundwater Sampling and <br />Low Flow Groundwater Purging and Sampling. <br />April 2024 1 553-1763-010 B-7 <br />