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2. Rinse thepH probe and tcmpezature probe with deionized water then place inth solution. a pH 7 3. Adjust the meter for the appropriate tcmperature then read the pH. 4. If required use the "calibrate" adjustment on the meter to correct the instrument to read pH 7. 5. Rinse the pH and temperature probes with deionized.water and place in the solution (note: at Forward landfill PH I4 groundwater pH is usually above 7 therefore it is aWOPdatc to use the Ph 10 standard. If the pH is below 7 hien the pH 4 standard should be used b. Use the "slope"adjustment to correct the meter to praparlY read pH 10- 7. Repeat steps 2 to 6 until the meter reads pH.7 and 10 as closetY as possible_ The calibration process will be recorded on a pH Vibration log. Copies of calibration logs for each iividual.&str=Mt are kept in a binder-at the-ofice- The lags are reviewed Pecally --` to assess whether the instrument-is.becoming=more di cul calibrate brate and �dicreffo�reodinceds _ adjustment by the manufacturer,.or if new probes are required- Co duuctivi Meter Conductivity measurement is subject to variations due to trsuperatitm and hot ument drift For this reason conductivity meters-roust be caffbrated before and after,sampling on each day and at — least voce more during the day_ Tb calibrate a conductivity meter the instrument leading . adjusted to read con=tfy for solutions with a standard conductivity. Standard conductivity solutions are mixed fresh, according to .package izz$trtuctiarts, for each SamPiinB cve nt Standard solutions for conductivity of 104, 1004, or 1.0,000 umlibetiter arc 'COMMerrkHy available. These standards are purchased fresh and discarded after shelf life has eVktd Shelf lives vary depending on the brand of standards used; If pre-fid solution is tusai,the expiration date of the solution will be noted on the calibration log. - 849-F0112310R323 A-3COMTkW zM J*I4,2400 .I*-