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LABORATORY CONTROL SPIKE/LABORATORY CONTROL SPIKE DUPLICATE <br /> ' EPA 8015 MODIFIED <br /> TOTAL EXTRACTABLE PETROLEUM HYDROCARBONS <br /> Preparation Method EPA 35505 <br /> Date Prepared 11/01/95 10 00 Lab ID 29625-LCS /7948 <br /> Initial Wt (Volume 60 grams Matrix Soil Units mg/Kg (ppm) <br /> Final Volume 10 mL Batch Number 4010-951101 <br /> LCS Date Analyzed 11/03/95 LCSD Date Analyzed NA <br /> (a) (b) (c) (d) (e) (f} (g) <br /> Sample <br /> Sample Dup Acceptance <br /> + + Spike Limits <br /> 1Sample Spike Spike Spike Spire Dap RPD <br /> Analyte Conc Conc Conc Rec 9 Conc Rec % % Rec RPD <br /> TPH (Extractable) (C7-C32) 0 41 7 26 62 NA NA NA 52-125 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 = ( Ic-el ) / ( (c+e) x 5) x 100 <br /> ' The cover letter and enclosures are integral parts of this report <br /> Approved by Date <br /> MBT Env nmental Master Builders Technologies <br /> Report Generated 11/06/95 Laboratories�- Page 1 <br />