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1 COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> lent AMERCO Real Estate Company Service Request L9703331 <br /> 1 Project U-Haul Stockton/709-50 Date Collected NA <br /> Sample Matrix Water Date Received NA <br /> Date Extracted NA <br /> 1 Date Analyzed 10/3/97 <br /> Matnx Spike/Duplicate Matnx Spike Summary <br />' Volatile Organic Compounds <br /> Sample Name Batch QC Units ug/L(ppb) <br />'Lab Code L9703269-001MS, L9703269-OOIDMS Basis NA <br /> Test Notes <br /> 1 Percent Recovery <br /> CAS Relahve <br /> Prep Analysis Spike Level Sample Spike Result Acceptance Percent Result <br />'Analyte Method Method MRL MS DMS Result MS DMS MS DMS Limits Difference Notes <br /> 1,1-Dichloroethene(1,1-DCE) EPA 5030 8260 05 500 500 ND 3 38 374 68 75 61-145 10 <br /> (TCE) EPA 5030 8260 05 500 500 ND 460 503 92 101 71-120 9 <br />,Tnchloroethene <br /> Benzene EPA 5030 8260 0 5 500 500 ND 4 61 468 92 94 76-127 2 <br /> Toluene EPA 5030 8260 05 5 00 500 ND 547 563 109 113 76-125 3 <br /> orobenzene EPA 5030 8260 0 5 500 500 ND 4 80 525 96 105 75-130 9 <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Approved By I inxi Date Q <br />�MSI05089716M]VOA HW I g 1019!97 pp8o No <br />