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2: Rinse the pH probe and temperature probe with deionized water then place in the PH 7 solution. . . 3. Adjust the teeter for the appropriate temperature then read the pH. 4, If required use the "calibrate" adjustment on the meter to correct the uuttumcnt to read pH 7. . S. Rause the pH and temperature probes with delonized .water and place in the PH 10 solution (note: at Forward I:andfll.gmundwater pH is usualfy above 7 therefore it is appropriate to use the Ph 10 standard. If the pH is below 7 them the pH 4 standard shouldbe used) 6. Use the "slope"adjustment to con-ect the meter to properly read pH 10. 7. Repeat steps 2 to 6 until the meter reads PH.7 and 10 as closely as possible. T1t4e calibration process will be recorded on a pH calibration log. Copies of calibration logs for e,2c1t individual.instrument.are kept in a binder-at the office. The logs are reviewed periodically �,. to asse.•ss -whether the instrument-is.becoming•mere diflYcult to calibrate and therefore.-needs - adjustment by the manufacturer,yr if new probes arc required Canductivity Meter Conductivity mcasurement is subject to variations due to temperature and instrument drift. For d:ds reason conductivity metem must be calibrated before and after sampling on each day and at least once; more during the day. To calibrate a conductivity meter the instrument reading is. adjusted to read correctly for solutions with a standard conductivity. Standard conductivity solutions are mixed fresh, according to package instructions, for each sampling event Standard solutions for conductivity of 100, 1000, or 1. -0,000 umhos/liter,are carte =vklly available. These standards are purchased fresh and discarded after shelf life has expired. Shelf.&es vary depending on the brand of standards used.; If pre-prepared_solution is used,the expiration date of the solution will be noted on the calibration log. { 23-433949-Fla -3 l\2318R32S AJuly 14,200 2M 9khAider.lac.,