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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 <br /> 0 <br /> Roseville, CA 95678 <br /> Phone#: (916) 773-3664 Fax#: (916) 773-4784 <br /> ANALYSIS REPORT <br /> Attention: Mr. Gary Barker Date Sampled : 04-04-97 <br /> Horizon Environmental Date Received: 04-04-97 <br /> 5011 Golden Foothill Pkwy, Ste 7 BTEX Analyzed: 04-08,09-97 <br /> El Dorado Hills, CA 95762 TPHg Analyzed: 04-08,09-97 <br /> Project: Discovery Chevrolet Matrix: Water <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes TPHg <br /> PPB PPB PPS PPB PPB <br /> Reporting Limit: 0,5 0.5 0.5 0.5 50 <br /> SAMPLE <br /> Laboratory Identification: <br /> W-0404-MW4 1.1 0,5 10,9 35.5 415 <br /> G:=1 W0497048 <br /> W-0404 MW5 ND ND ND ND ND <br /> W0497049 <br /> ppb=Parts par billion=ug/L=micrograms per liter <br /> ND=Not detected. Compound(s)maybe present at concentrations below the reporting limit. <br /> ANALYTICAL PROCEDURES <br /> BTEx-- Benzene, toluene, ethylbenzene, and total xylene isomers (BTEX) are analyzed by using EPA Method 602 which utilizes a gas <br /> chromatograph(GC)equipped with a photoionization detector(PID). <br /> TPHg—Total petroleum hydrocarbons as gasoline(low-to-medium boiling points)are analyzed by using modified EPA Method 8015,which atilizes a <br /> GC equipped with an FID. <br /> D't (JZ�6 , 04-16-97 <br /> a oratory Representative Date Reported <br /> EXC'ELCHEM UNVIRONMEFrI-AL LABS IS CERTIFIEn IiY'CHG STATE OF CALIFORNIA <br /> OEPARTMENTOF HEALTH SERVICES AS A WAROOUS WAM TESTING LABORATORY <br /> (CertiBcarton No,1760,2119) <br />