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• 6A.' en r ;,at _ - Helena MT 877- 472 -0711 • Billings, MT 800- 735 -4489 • Casper, wy 888 -235 -0515 <br />l Anatytrcal Excellence Since 1951 allrttn wy 866.686 -7115 • Rapid City, SD 888 -672 -1225 0 College Station, Tx 888- 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: O'Connor Design Inc <br />Project: CM -25 <br />Analyte <br />Method: A2510 B <br />Sample ID: SC 2ND 1413 <br />Conductivity @ 25 C <br />Sample ID: MBLK <br />Conductivity Cm 25 C <br />Sample ID: C12050521- 004ADUP <br />Conductivity C 25 C <br />Count Result Units <br />Laboratory Control Sample <br />1450 umhos /cm <br />Method Blank <br />2 umhos /cm <br />Sample Duplicate <br />2220 umhos /cm <br />Report Date: 06/18/12 <br />Work Order: C12050462 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch R159595 <br />Run PHSC_101- C_120515A 05/15/12 09:18 <br />1 0 103 90 110 <br />Run PHSC_101- C_120515A 05115/12 09 24 <br />02 <br />Run PHSC_101- C_120515A 05/15/12 09-53 <br />1 0 1.6 10 <br />Qualifiers: <br />L - Analyte reporting limit ND - Not detected at the reporting limit <br />1DC - Minimum detectable concentration <br />