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URSData Validation Memorandum <br /> 8801 Folsom Boulevard,#200 <br /> SacramentCA <br /> Dames & Moore Telephone-(9 6) 39582687-8800 <br /> ' Fax—(916)387-0802 <br /> TO Jack Kemp INFO <br /> ' FROM Sacramento QA/QC Group FILE 15884-017-044 <br /> DATE November 13,2000 SITE American Forest Products <br /> SUBJECT Summary of Data Validation for the STL Report GOH260141 <br /> A check for data completeness(Completeness Check)was performed by the Sacramento QA/QC Group on <br /> ' STL Report GOH260141 This report contains analytical data for eight aqueous samples DMW-I, <br /> DMW-2, DMW-3, DMW-4, DMW-5, DMW-6, DMW-7, and DMW-70 Samples DMW-7 and <br /> DMW-70 represent a field duplicate pair The samples were collected on August 25, 2000 and submitted <br /> to STL in West Sacramento, California for analysis The analyses requested include TPH-Diesel with <br /> Northwest Cleanup(EPA 8015M), Ethanol(EPA 80158), Oxygenates,and 1,2-DCA (EPA 8260B) <br /> The data were reviewed in accordance with analytical methods outlined in SW-846 The data were <br /> evaluated based on the following parameters <br /> ✓ Data Completeness <br /> ✓ Holding Times <br />' ✓ Blanks <br /> ✓ Laboratory Control Samples <br /> ✓ Matrix Spike/Matrix Spike Duplicates <br /> ✓ System Monitoring Compounds(Surrogates) <br /> ' ✓ Field Duplicates <br /> If Compound Identification and Quantification <br />' The following presents an overview of the Completeness Check <br /> • All analyses were performed as requested on the chain-of-custody record and all holding times were <br />' met <br /> • All associated blanks were free of contamination <br />' • All Laboratory Control Sample recoveries were within laboratory acceptance limits <br /> • An assessment of matrix effects can not be made since an MS/MSD analysis was not performed <br />' • All surrogates are appropriate for their respective methods All surrogate recoveries were within <br /> laboratory acceptance limits <br /> • There were no significant differences observed for the field duplicate pair DMW-7/DMW-70 <br /> • No dilutions were performed <br /> • The laboratory has notated the ethanol results for samples DMW-1 and DMW-3 as suspect due to <br /> hydrocarbon interferences These results should be considered estimated <br /> These data are acceptable and are useable for their intended purpose <br /> A ISacva108 800 <br /> 1 <br />