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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client EMCON Associates Service Request 5950210 <br /> Project ARCO Facility No 2168/E`1CON Project No 1775-234 01 Date Collected- 2/16/95 <br /> Sample Matra-, Water Date Received 2/21/95 <br /> Date Extracted NA <br /> Date Analyzed 2/27,28195 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code cx,a,cx-Trifluorotoluene <br /> MW-1 (54') 5950210-001 102 <br /> MW-2 (53') 5950210-002 98 <br /> MW-3 (53') 5950210-003 101 <br /> MW-4 (58') 5950210-004 97 <br /> MW-5 (59') 5950210-005 104 <br /> MW-6 (47') 5950210-006 94 <br /> MS S950196-002MS 105 <br /> DMS 5950196-002DMS 106 <br /> Method Blank 5950227-WB1 105 <br /> Method Blank 5950228-WB1 90 <br /> CAS Acceptance Limits 69-116 <br /> Approved B-, c LQe� Date 7-11-A <br /> MA 1/062994 <br /> Page 5 <br /> 1921 Rinowood AvonuP 6 5nn lnvp (-nhfnrrnn 09;4'14 • TP1-- - AnA/A`k-? 'YAnn C-- AnAIA k7 01'aA <br />