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. DATA VALIDATION MEMO DAMES & MOORE Sacr Folsom Boulevard,#200 Sacramento,CA 95826 A DAMES a MOORE GROUP ODMPAMy Telephone-(916)387-8800 Fax-(916)387-0802 TO: Dave Zuber INFO: FROM: Sacramento QA/QC Group FILE: 15884-016-044 ' DATE: August 27, 1998 SITE: American Forest Products SUBJECT: Summary of Data Validation for Quanterra Report 300566 A check for data completeness (Completeness Check) was performed by the Sacramento QA/QC Group on Quanterra Report 300566 for the American Forest Products protect This report contains analytical data for six samples DMW-1, DMW-5, DMW-2, DMW-20, DMW-3, and DMW4 Samples DAM-2/DMW-20 represent a field duplicate pair These samples were collected July 23, 1998 and submitted to the laboratory for analysis of TPH-diesel (EPA 8015M). The laboratory report was received by the Sacramento QA/QC group on August 27, 1998 The data were reviewed in accordance with analytical methods outlined above The data were evaluated based on the following parameters Some data were refected in accordance with the principles of EPA validation procedures ✓ Data Completeness I ✓ Holding Times ✓ Blanks ✓ Laboratory Control Samples ✓ Matrix Spike/Matrix Spike Duplicates ✓ Field Duplicates ✓ System Monitoring Compounds(Surrogates) i ✓ Compound Identification and Quantification The following presents an overview of the Completeness Check IAll analyses were performed as per Chain-of-Custody(COC)and all holding times were met • No assessment of matrix interferences can be made, because no MS/MSD analysis was performed All LCS recoveries met QC criteria. + No significant differences were noted between field duplicate pair, DMW-2/DMW-20 • No contaminants were detected in any associated method blank These data are acceptable in all areas of review and are useable for their intended purpose A 15acva108 609 1