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' LABORATORY CONTROL SPIKE/LABORATORY CONTROL SPIKE DUPLICATE <br /> PESTICIDES AND POLYCHLORINATED BIPHENYLS <br /> Analytical Method EPA 8080 <br /> ✓ Preparation Method EPA 3520 <br /> ' Date Prepared 11/01/95 15 30 Lab ID 2 614-LCS 29615-LCSD/7721 <br /> Initial Wt /Volume 1000 mL Matrix Water Units uu /_g.L "b <br /> Final Volume 5 0 mL Batch Number. 4005-951101 <br /> LCS Date Analyzed 11/03/951933 LCSD Date Analyzed 11/07/95 0329 <br /> Instrument/Column /RTX-35 <br /> ' Analyst LLI Data File 95307m47-0, 95307m48- <br /> (a) (b) (c) (d) (e) (f) (g) <br /> Sample <br /> Sample Dup Acceptance <br /> + + Spike Limas <br /> ' Sample Spike Spike Spike Spike Dup RPD <br /> Analyte Conc Cone Cone Rec % Conc Rec % % % Rec RPD <br /> alpha-BHC 0 012 015 118 013 104 14 40-160 s20 <br /> gamma-BHC (Lindane) 0 0 12 014 111 0 14 115 0 60-140 520 <br /> Heptachlor 0 012 013 106 012 100 8 40-331 s20 <br /> Endosulfan I 0 0 12 013 101 0 14 112 7 40-160 520 <br /> ' Dieldrin 0 025 027 108 031 125 14 40-160 520 <br /> Endnn 0 025 028 113 030 121 7 40-160 s20 <br /> 4,4'-DDD 0 025 026 105 029 118 11 40-160 s20 <br /> 4,4'-DDT 0 025 026 102 0 33 133 24* 40-160 s20 <br /> Methoxychlor 0 12 13 106 19 155 38* 40-160 s20 <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 /> (h) (k) 0) <br /> Sample Sample <br /> + Dup <br /> ' Surr Surr Surr + Surr <br /> Spike Spike Spike Surr Spike Acceptance <br /> Surrogate Conc Conc Rec % Spike Conc Dup Rec % Limits <br /> Tetrachloro-m-xylene 050 040 80 0 38 76 60-150 <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 Date !/-g-rr. <br /> MBTlronmental lilt Master Builders Technologies <br /> ' Report Generated 11/08/95 Labor ones Jill Page 1 <br />