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2. Rinse the pH probe and temperature probe with deionized water then place in the PH 7 <br /> ..t solution, <br /> 3. Adjust the meter for the appropriate temperature thea read the p _ <br /> 4. If required use the "calibrate' adjustment on the meter to correct the instrIment to <br /> read <br /> PH 7. . <br /> Rinse the pH and temperatureprobes with delonized water and place in the pH 10 <br /> solution (note: at Forward landfM groundwater pH is USUalfy above 7 therefore it is <br /> appropriate to use the Ph 10 standard If the pH is below 7 then the pH q,standard should <br /> be used) <br /> 6. Use the "slope"adjustment to correct the Meter to properly read pH 10- <br /> 7- <br /> 0_7- Repeat steps 2 to 6 until the mew reads pH.7 and I0 as closely as possibleThe _ - <br /> calibration process wM be recorded on a pH calibration lag. Copies of'cabIxation logs for <br /> eakh IndividualIndividubi <br /> .ifistraxnent ire kept in a binder At the office. The logs are reviewed periodically <br /> to assess whethw the ' ent•is.becoming-mom &ffcult to cerate and therefore.-needs - <br /> adj ent by the manufacturer,or if new probes are uired_ <br /> C <br /> OaAleflvitv Meter <br /> Conductivity in eat is subject to vm7adons due to temperaftire and ' ant dri& For <br /> reasonthis conductivity meters mast be talibtated before and after sampling on day and at = <br /> least once mom during the day. To cahibrate a cotiductivity meter the ' eatreading is <br /> 4USted to read cm=dy for solutions with a standard conductivity. <br /> Stmdard conductivity solutions'are mixed fiwk according to pwjmgc " coons, for <br /> evert.. Standard solutions for . `vity of 100, 1 OW, -or 1.0,000 umd2dsfter,arc <br /> y available. I h,:se standgrds-am purchased fiesh and discarded Mkr shelf life bas <br /> ding on the brandof used: If pre .solution is <br /> the expiration date of the solution will be noted on the m1ibration log. <br /> 23 849-iO 11233 l Q A-3My 14,200 <br /> 2400 KkWkWa,tae, <br />