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'i LABORATORY CONTROL SPIKE/LABORATORY CONTROL SPIKE DUPLICATE <br /> r <br /> VOLATILE AROMATIC COMPOUNDS <br /> I <br /> Analytical Method: Modified EPA 8020(BTEX)/EPA 8015 (TPH) <br /> . Preparation Method EPA 5030 <br /> I <br /> Date Prepared 11/07/95 Lab ID 30273-LCS 18404 <br /> Initial Wt /Volume 20 grams Matrix Soil Units ua/Kg <br /> Final Volume 10 mL Batch Number 4096-951107 <br /> LCS Date Analyzed 11/07/95 LCSD Date Analyzed. NA <br /> Instrument/Column vgc04/DB-WAX <br /> ' Analyst TL Data File. 95310d49-0 <br /> (a) (b) (c) (d) (e) (t} (g) <br /> Sample <br /> Sample Dup Acceptance <br /> + + Spike Limits <br /> Sample Spike Spike Spike Spike Dup RPD <br /> Analyte Cone Conc Conc Rec % Conc Rec % % % Rec RPD <br /> Benzene 0 250 280 113 NA NA NA 70-124 s25 <br /> Ethyl benzene 0 250 260 103 NA NA NA 67-128 s25 <br /> TPH (Purgeable) (C4-C12) 0 2500 2700 108 NA NA NA 75-125 s25 <br /> ' Spike Recovery = d = ( (c-a) /b) x 100 <br /> Spike Duplicate Recovery = f = ( (e--a) /b) x 100 <br /> Relative Percent Difference = g = ( i c-e l ) / ( (cfe) x 5) x 100 <br /> . (h) (k) (1) <br /> Sample Sample <br /> + Dup <br /> ' Surr Surr Surf + Surr <br /> Spike Spike Spike Surr Spike Acceptance <br /> Surrogate Conc Conc Rec % Spike Conc Dup Rec % Limits <br /> Bromofluorobenzene (PID) 200 250 123* NA NA 60-111 <br /> Bromofluorobenzene (FID) 200 220 108 NA NA 60-111 <br /> ' Surrogate o Recovery = 0 = (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 rntegral parts of this report <br /> Approved by Date !/—l-4. <br /> MBTCnvvironmental Master Builders Technologies <br /> Labo <br /> Report Generated 11/09/95 '��„ Page 1 <br />