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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916) 921-9600 <br /> FAX 92! <br /> 100 <br /> Analytical <br /> www seququoialabs comom <br /> Upgradient-Valley Springs Projet i J&L Market <br /> 336 Augusta Court Project Number NIA Repot ted <br /> Valley Springs CA 95252 Project Manager Vic Cherven 12/11/01 14 37 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %R-EC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1110267- CPA 5030E [MeOH] <br /> LCS_(I I10267-BS1) Prepared&Analyzed 11/27/01 <br /> Methyl tert butyl ether �- 308 0 10 mg/kg 2 50 123 60-140 <br /> .Surrogate 12-DCA-d4 219 250 91 6 60-140 <br /> Matrix Spike(III 026.7--MS1) _ Sour_ce S111224-02 _ Prepared&Analyzed 11/27/01 <br /> Methyl tert-butyl ether — F 262 0 10 mg/kg 2 50 ND 105 60-140 <br /> ---- -- -------- ------------- --------- <br /> Surrogate 12-PCR-d4 224 2 SO 896 60-140 <br /> Matrix Spike Dup(1110267_MSDI) — ` - Source 5111224-02 - Prepared&Analyzed 11/27/01 �— <br /> Methyl tent-butyl ether 259 0 10 mg/kg 250 ND 104 60-140 1 15 25 <br /> Surrogate 12-DCQ-d4 - 2 17 f 250 868 60-140 <br /> 0 <br /> uoia Analytical - Sacramento The results to this report apply to the samples analyzed in accordance with the chain of <br /> cttstady dactimene This analytical report nurse be,?produced—its entirafy <br /> Page 15 of 18 <br />