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PRECIS <br /> ENYIRO <br /> on ECH <br /> Analytical Laboratory <br /> CERTIFICATE OFAIVALYS <br /> Tuesday,July 22, 2005 <br /> Attention: Doug Heard <br /> Kleinfelder, Inc. <br /> 2825 Myrtle St. Report Page 92 of 103 <br /> Stockton, CA 95205 <br /> Volatile Organic Compounds by EPA Method 82606 <br /> Sample ID: 31969 TP 12 -COMP Sample Information <br /> Laboratory ID: 5070608-19 Sample Type: Grab <br /> Date/Time Sampled. 01-Jul-05 00:00 by Doug Heard Project Name: 99 Speedway <br /> Sample Matrix: Soil <br /> FTestrameter Result DLR Unit Dilution Batch Prepared Analysis Date Method <br /> oethene ND 2.00 u /k Not9 9 1 AG50802 08-Jul-05 08-Jul-05 EPA 82606ofluoromethane ND <br /> 2.00 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 82606 <br /> 1,2,3-Trichloropropane <br /> ND 2.00 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 8260B <br /> 11315-Trimethylbenzene ND 2.00 ug/kg 9 9 1 AG50802 08-Jul-05 08-Jul-05 EPA 82608 <br /> 1,2,4-Trimethylbenzene ND <br /> Vinyl acetate 2.00 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 8260B <br /> ND 20.0 ug/kg 1 AG50802 08-Jul-OS 08-Jul-05 EPA 8260B <br /> Vinyl chloride ND 2.00 ug/kg 9 9 1 AG50802 08-Jul-05 08-Jul-05 EPA 8260B <br /> Methyl tert-butyl Ether(MtBE) ND <br /> 2.00 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 82608 <br /> m,p-Xylene ND 2.00 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 8260B <br /> Ethyl tert-Butyl Ether(ETBE) ND <br /> 2.00 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 8260B <br /> to ylene Methyl Ether(TAME) ND 2.00 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 82608 <br /> o-Xylene <br /> tert-Butyl Acohol(TBA) ND 2.00 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 8260B <br /> ND 50.0 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 82608 <br /> Diisopropyl Ether(DIPE) ND <br /> 2.00 ug/kg 1 AG50802 08-Jul-05 08-Jul-05 EPA 8260B <br /> Surrogate:Dibromofluoromethane 101 % 86-118 <br /> Surrogate:Toluene-d8 96% 88-110 <br /> Surrogate:4-Sromofluorobenzene 95% 86-115 <br /> mg/L=milligrams per Liter=ppm <br /> DLR=Detection Limit for Purpose of Reporting. <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> (�J/10t-Z <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 Dhone: (209) 477-8105 Fax: (209) 477-8148 <br />