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2. .Rinse the pH probe and Temperature probe with d4onized water then place in the pH 7 <br /> solution, <br /> 3. Adjust the meter for the appropriate temperature then read the p . <br /> ¢. If required use the "calibrate" adjustment on the meter to correct the Inst vrnent to read <br /> �- Rinse the PH and temp,,temp, =tur pro deionized water and place in the pH 1t1 <br /> solution (note: at Forward landfill groundwater PH is usuziIy above 7 therefore it is <br /> appropriate to use the Ph 10 standard. If the pH is below 7 d xn the PH 4.standard should <br /> be asci) <br /> 6- Use the "slope"adjustment to correct the meter to properly read pfd 10. <br /> 7. Repeat steps 2 to 6 until the rneter reads p .7 and 10 as closely as possible. <br /> +e calibration process will be recorded on a pH calibration tog. Copies of c:ah-bration logs for <br /> individual ent are kept in a binder.at e o cc, The logs are reviewed periodically <br /> to assess whether the ' ent•is. =moredffctdt to calibrate and -therefore-needs - <br /> adjustment by the manufacturer,,or if new probes are required- <br /> �ConductivJMMcter <br /> Conductivity ineasw=eat is subject to yariations due,to and ' cnt drifL For <br /> this reaso <br /> n Gond ' 'ty meters must ba calf ed before and af ber.sampling on each day and at = <br /> l otice more dtuing the day- To cahibratc a conductivity meter the ihstrurnentreading is <br /> to read coxrectly for solutions with a standard conductivity. <br /> Standard Conductivity solutions " ed to pacJMgC instructions, for each <br /> samtpling cventw. Standard soI 'ons for conductivity of 100, 1000, or 10,000 mnhds4itcx-arc <br /> tcmlncrc�y available. I hese stmdards are purchased fmh and discarded shelf life has <br /> Shelf lives vary depending on the brznd o If ,solution is <br /> -1 <br /> rhe expiration date of the solution will be noted on the cahibration log. <br /> 23 849-fi0y i`�23!Q A-3 July 14,20% <br /> M O t� <br />