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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> dent -ARCO Products Companv Service Reyue%t: 59601080 <br /> Project 6020 Manteca/#21775-243 002/TO#19350 00 Date Collected. 713196 <br /> Sample Matrix- Nater Date Received 7/8/90 <br /> Date Extracted NA <br /> Date Analyzed 7/10196 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> Units ug/L(ppb) <br /> Sample Name %1W-1 (36) <br /> Lab Code 59601080-001 <br /> Peri- Lnt Rccovei _% <br /> CAS ltelatn e <br /> Sp1kc Level Sample Spike Rt cult Acceptance Percent <br /> Analrtc MS DMS Result Ms DMS MS DMS Limits Diffemncc <br /> ND 250 250 1011 [Ilf1 c.7-I�l I <br /> U\Itiiti Ou61 II <br /> Page 7 <br />