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Client BSK Pleasanton <br /> BSK Lab Number Ch950999 , <br /> Project Name Van Den Bergh <br /> Project Number P92219 3 <br /> Page 3 of 3 <br /> BSI( ANALYTICAL LABORATORIES <br /> ORGANIC QA/QC SUMMARY REPORT <br /> Analysis/Analyte Run Units DLR MB Result LCS Spikes Analyst <br /> No Result LCS%Rec MS%Rec MSD%fiec RPD Initials <br /> BTEX <br /> Benzene 95033 pg/L 0 3 <0 3 105 94 93 <1 IA <br /> Toluene 95033 pglL 0 3 <0 3 112 88 89 2 IA <br /> Ethylbenzena 95033 pglL 0 3 <0 3 102 93 95 2 IA <br /> m Xylene 95033 pg/L 0 3 <0 3 102 93 95 2 IA <br /> p-Xylene 95033 pglL 0 3 <03 100 92 94 2 IA <br /> o-Xylene 95033 pg/L 0 3 <0 3 104 95 96 <1 IA <br /> Fluorobenzene (Surrogate) 95033 % -- 96 -- 99 100 - IA <br /> TPH -Diesel <br /> TPH-Diesel 95043 jug/L. 50 <50 101 100 108 8 JC <br /> Tetracosane Surra ate) 95043 % 56 61 42 JC <br /> BTEX Surrogate (Fluorobenzene) Recovery 0998-1 96% Rec 0998-2 97% Rec 0998-3 96% Rec <br /> TPH-D Surrogate (Tetracosane) Recovery 0998-1 59% Rec 0998-2 44% Rec 0998-3 39% Rec <br /> DLR Detection Limit for Reporting Purposes LCS Laboratory Control Sample MS Matrix Spike MSD Matrix Spike Duplicate RPD Relative Percent Difference % <br /> Rec Percent Recovery <br /> RPD= DI-D2 X100 Percent Recovery= T x 100 <br /> D1 = first sample value, D2 = second sample value, X = the observed value of measurement, T = "true" value X N A i Y 1 I ( 1 E <br /> MLIABORATORIES <br />