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ASSET Laboratories nate: 28-Alar-17 <br /> CLIENT: Pacific Edge Engineering <br /> Project: Manteca Firing Range,0025 CASE NARRATIVE <br /> Lab Order: N023518 <br /> SAMPLE RECEIVING/GENERAL COMMENTS: <br /> Samples were received intact with proper chain of custody documentation. <br /> Cooler temperature and sample preservation were verified upon receipt of samples if applicable. <br /> Information on sample receipt conditions including discrepancies can be found in attached Sample <br /> Receipt Checklist Form. <br /> Samples were analyzed within method holding time. <br /> Analytical Comments for EPA 601013: <br /> Matrix Spike (MS) and Matrix Spike Duplicate(MSD) are outside recovery criteria for some analytes <br /> in QC samples N023518-004A-MS and N023518-004A-MSD possibly due to matrix interference. The <br /> associated Laboratory Control Sample (LCS)recovery was acceptable. <br /> RPD for Sample Duplicate(DUP)N023518-OI OA-DUP is outside criteria for lead possibly due to non- <br /> homogeneity of sample; however,the Laboratory Control Sample(LCS)validated the analytical batch. <br /> Matrix Spike (MS)and Matrix Spike Duplicate(MSD) samples N023518-010A-MS,N023518-05OA- <br /> MS and N023518-05OA-MSD are outside recovery criteria for lead possibly due to matrix interference. <br /> The associated Laboratory Control Sample(LCS)recovery was acceptable. <br /> Analytical Comments for EPA 7471 A: <br /> Matrix Spike (MS) is outside recovery criteria; however, the Laboratory Control Sample(LCS) <br /> validated the analytical batch. <br /> Analytical Comments for EPA 8270C-SIM: <br /> Laboratory Control Sample(LCS)recovery biased low for fluoranthene.NELAC standard allows for <br /> one analyte in marginal exceedence based on 11-30 analytes on Laboratory Conrol Sample(LCS). <br /> RPD of some analytes in Matrix Spike(MS)/Matrix Spike Duplicate (MSD)is outside criteria; <br /> however, recovery on both met acceptance criteria. <br /> CALIFORNIA I P:562.219.7435 F:562.219.7436 NEVADA�P:702Ne2&)f P902.307.2691 <br /> ASSET LABORATORIES 11110 Artesia Blvd.,Ste B,Cerritos,CA 90703 3151 W.Post Rd., Las Vegas,NV 89118 <br /> ELAP Cert 2921 ELAP Cert 2676 1 NV Cert W00922 <br /> "Serving Clients with Passion and Professionalism" EPA ID CA01638 ORELAP/NELAP Cert 4046 <br /> Page 2 of 99 <br />