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819 Striker Avenue jSulte 8 <br /> Sequoia Sacramentoc95834 <br /> (9 91t 6)922 t-9600 <br /> FAX(916)921-0 100 <br /> Analytical www sequolalabs com <br /> SECOR International-Sacramento Protect ARCO 2133, Stockton,CA Sampled 413100 <br /> 9912 Business Park Dr,Ste 100 Project Number 077 41929 190 Received 4/4/00 <br /> Sacramento,CA 95827 Protect Manager Rusty Benkosky Reported 4112100 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE in Air by DHS LUFT/Quality Control <br /> Sequoia Analytical- Sacramento <br /> Date Spike Sample QC Reporting limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0040065 Date Prepared 4/6100 Extraction Method EPA 5030B(Me011) <br /> Blank 0040065-BLKI <br /> Purgeable Hydrocarbons 416100 ND mglm'Air 100 <br /> Benzene ND 00500 <br /> Toluene ND 00500 <br /> Ethylbenzene _ND 00500 <br /> Xylenes(total) _ ND "-- - - 00500 - - - - - <br /> Methyl tent-butyl ether - ND 0 500 <br /> Surrogate a a a-Trifluorotoluene 200 2 18 600-140 109 <br /> LCS 0040065-BS] <br /> Benzene 416100 200 1 99 mg/m'Air 700-130 995 <br /> Toluene 2 00 2 03 700-130 101 <br /> Ethylbenzene 200 1 98 700-130 990 <br /> Xylenes(total) 600 5 95 700-130 9920 <br />_Methyl tert-butyl ether _ " 200 1 99 700-130 995 _ __— <br /> Surrogate a a a-Trifluorotoluene 200 238 600-140 119 <br /> LCS Dui) 0040065-BSD1 <br /> Benzene 416100 200 2 00 mglm'Air 700-130 <br /> 100 25 0 0 501 <br /> Toluene 2 00 2 03 700-130 101 25 0 0 <br /> Ethylbenzene 2 00 200 700-130 100 250 1 01 <br /> Xylenes(total) 600 599 700-130 99 8 250 0 603 <br /> Methyl tert-butyl ether __ _ 2 00 202 700-130_101 _25 0.— 1 50--- <br /> Surrogate a a a-Trrfluorotoluene 2 00 2 41 600-140 121 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 5 of 8 <br /> `dd' <br />