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LABORATORY CONTROL SPIKE/LABORATORY CONTROL SPIKE DUPLICATE <br /> VOLATILE AROMATIC COMPOUNDS <br /> Analytical Method Modified EPA 8020(BTEX)/EPA 8015 (TPH) <br /> Preparation Method EPA 5030 <br /> I <br /> ' Date Prepared- NA Lab ID. 30275-LCS /8404 <br /> Matrix Water Units u /L b <br /> Batch Number 440L 7 <br /> LCS Date Analyzed 11/08/95 LCSD Date Analyzed NA <br /> Instrument/Column vgc04/DB-WAX <br /> Analyst TL Data File 95210d62-0 <br /> ' (a) (b) (c) (d) (e) (g) <br /> Sample <br /> Sample Dup Acceptance <br /> + + Spike Limits <br /> Sample Spike Spike Spike Spike Dup RPD <br /> ' Analyte Conc Conc Cone Rec % Conc Rec % % % Rec RPD <br /> Benzene 0 10 12 123 NA NA NA 72-134 s20 <br /> Ethyl benzene 0 10 11 110 NA NA NA 72-128 s20 <br /> TPH (Purgeable) (C4-C12) 1 0 100 99 99 NA NA NA 80-120 s20 <br /> Spike Recovery = d = ( (c-a) /b) x 100 <br /> ' Spike Duplicate Recovery = t = ( (e-a) /b) x 100 <br /> Relative Percent Difference = g = ( Ic-el ) / ( (c+e) x 5) x 100 <br /> (h) (1) T (k) <br /> Sample Sample <br /> + Dup <br /> Surr Surr Sun + Surr <br /> Spike Spike Spike Surr Spike Acceptance <br /> Surrogate Conc Conc Rec % Spike Conc Dup Rec % Limits <br /> Orthochlorotoluene (PID) 40 38 94 NA NA 80-120 <br /> Orthochlorotoluene(FID) 40 66 166* NA NA 80-120 <br /> Surrogate o Recovery = 3 = (i-h) x 100 <br /> Surrogate Duplicate Recovery = 1 = (k/h) x 100 <br /> Qualifier Legend <br /> * - Value beyond QC limits <br /> ' The cover letter and enclosures are integral parts of this report <br /> Approved by I Date /1— - T, <br /> MBT E lronmental I� Master Build=Technologies <br /> ' Labora pries <br /> Report Generated 11!09195 Page t <br />