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McCampbell Analytical, Inc. <br />"When Quality Counts" <br />1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />To]] Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 <br />http://www.tmcarnpbell.com / E-mail: main@mccampbell.com <br />Chow Engineering <br />7770 Pardee Lane, Ste. 100 <br />Oakland, CA 94621-3023 <br />Client Project ID: #1 IR-120;CalWater <br />Stockton <br />Date Sampled: 12/15/11 <br />Date Received: 12/15/11 <br />Client Contact: Reuben Chow <br />Date Extracted: 12/15/11 <br />Client P.O.: <br />Date Analyzed: 12/16/11 <br />LUFT 5 Metals* <br />Extraction method: SW3050B Analytical methods: SW6010B Work Order: 1112484 <br />Lab ID <br />001A <br />Client ID <br />4E <br />Matrix <br />S <br />Extraction Type <br />TOTAL <br />Cadmium <br />ND <br />Chromium <br />35 <br />Lead Nickel <br />7.8 24 <br />Zinc <br />49 <br />DF <br />1 <br />% SS <br />109 <br />Comments <br />002A <br />5W <br />S <br />TOTAL <br />ND <br />33 <br />6.1 30 <br />46 <br />1 <br />i <br />100 <br />I <br />I003A <br />6E <br />S <br />TOTAL <br />ND <br />42 <br />6.6 29 <br />55 <br />1 <br />108 <br />f <br />Illi 004A <br />7M <br />S <br />TOTAL <br />ND <br />36 <br />6.0 25 <br />45 <br />1 <br />101 <br />I <br />OOSA <br />8W <br />S <br />TOTAL <br />ND <br />37 <br />5.4 24 <br />48 <br />1 <br />101 <br />i i <br />Reporting Limit for DF =1; W TOTAL NA NA NA NA NA NA <br />ND means not detected at or <br />above the reporting limit S TOTAL 1.5 1.5 5.0 1.5 5.0 mg/Kg <br />*water samples are reported in pg/L, product/oil/non-aqueous liquid samples and all TCLP / STLC / DISTLC / SPLP extracts are reported in mg/L, soil/sludge/solid samples <br />in mg/kg, wipe samples in µg/wipe, filter samples in gg/filter. <br /># means surrogate diluted out of range; ND means not detected above the reporting limit/method detection limit; N/A means not applicable to this sample or instrument. <br />TOTAL = Hot acid digestion of a representative sample aliquot. <br />TRM = Total recoverable metals is the "direct analysis" of a sample aliquot taken from its acid -preserved container. <br />DISS = Dissolved metals by direct analysis of 0.45 µm filtered and acidified sample. <br />%SS = Percent Recovery of Surrogate Standard <br />DF = Dilution Factor <br />DHS ELAP Certification 1644 <br />Angela Rydelius, Lab Manager <br />Page 14 of 21 <br />