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1 4 <br /> SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> 40preallan Engineering, Inc Client Project ID Unocal#5098,5606 Pacific Ave,Stockton Sampled Sep 29, 1993 <br /> 401 Stanwell Dr, Ste 400 Sample Descript Water, MW-11 Received Sep 29, 1993 <br /> Concord, CA 94520 Analysis Method EPA 5030/8010 Analyzed Oct 11, 1993 <br /> Attention Avo Avedessian Lab Number 309-1461 Reported Oct 13, 1993 <br /> HALOGENATED VOLATILE ORGANICS (EPA 8010) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Bromodichloromethane 50 N D <br /> Bromoform 50 N D <br /> Bromomethane 10 N D <br /> Carbon tetrachloride 50 N D <br /> Chlorobenzene 50 N D <br /> Chloroethane 10 N D <br /> 2-Chloroethyivinyl ether 10 N D <br /> Chloroform 50 N D <br /> Chloromethane 10 N D <br /> Dibromochloromethane 50 N D <br /> 1,3-Dichlorobenzene 50 N D <br /> 1,4-Dichlorobenzene 50 N D <br /> 1,2-Dichlorobenzene 50 N D <br /> 1,1-Dichloroethane 50 N D <br /> 2- is oroet ane... — ..... ..... ., ..... ... . 50 . . . ............................... 77 <br /> 1- Ic oroet ene 50 <br /> cis-1,2-Dichloroethene 50 N D <br /> trans-l,2-Dichloroethene 50 N D <br /> 1,2-Dlchloropropane 50 N D <br /> cis-1,3-Dlchioropropene 50 N D <br /> trans-l,3-Dichloropropene 50 N D <br /> Methylene chloride 50 N D <br /> 1,1,2,2-Tetrachloroethane 50 N D <br /> Tetrachloroethene 50 N D <br /> 1,1,1-Trichloroethane 50 N D <br /> 1,1,2-Trichloroethane so N D <br /> Trichloroethene 50 N D <br /> Trichlorofluoromethane 50 N D <br /> Vinyl chloride 10 N D <br /> Analytes reported as N D were not present above the stated limit of detection Because matrix etfects ana/or other factors <br /> required additional sample dilution detection limits for this sample have been raised <br /> EQUOIA ANALYTICAL <br /> Alan B Kemp <br /> Project Manager/ 3091460KEI <3> <br />