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*C%ILP%JIA AMALT 1 MAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> Kapreallan Engineering, Inc Client Project ID Unocal #5421,'7303 Pacdic Ave ,}Stockton <br />,2401 Stanwell Drive, Suite 400 <br /> Concord, CA 94520 <br /> Attention Mardo Kaprealian, P E QC Sample Group 2110460-516 Reported Nov 25, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> Method EPA 8015 EPA 8015 EPA 8015 EPA 8015 <br /> Analyst K Wimer K Wimer K Wimer K Wimer <br /> Reporting Units mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed Nov 23, 1992 Nov 23, 1992 Nov 23, 1992 Nov 23, 1992 <br /> Sample # 211-0512 211-0513 211-0516 Matrix Blank <br /> 0 Surrogate <br /> % Recovery 115 118 113 112 <br /> 0:;t.tUA <br /> OI NALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relative%Difference Conc of M S -Conc of M S D x 100 <br /> Chi O (Cont of MS + Cone of M S D)/2 <br /> Project Manager 2110502 KEI <25> <br />