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Excelchem Environmental Labs <br /> Ramage Environmental Project: SJ County Courthouse <br /> 465 South Meadows Parkway Suite 20 pmb 48 Project Number: NA Date Reported: <br /> Reno,NV 89521 Project Manager: Joe Ramage 03/09/07 14:52 <br /> BTEX/TPHG by PID/FID -Quality Control <br /> Rep rtin SSp,, pgour a °°JZF.0 Rp D <br /> Analyte Result �.im�� Units Leveel Resuclt %REC Eimrts RPD Limrt Notes <br /> 'Batch AQC0022-EPA 8021B/8015M <br /> lank(AQC0022-BLKI) Prepared&Analyzed:'03/05/07 <br /> Surrogate:Chlorobenzene 12.9 ug/l 12.5 :.103 70-130 <br /> QBenzene ND 0.55 <br /> oluene ND 0.5 <br /> thylbenzene ND 0.5 " <br /> Xylenes(total) ND 1.0 " <br /> Gasoline Range Hydrocarbons ND 50.0 " <br /> ,CS(AQC0022-BSI) Prepared&Analyzed:103/05/07 <br /> Surrogate:Chlorobenzene 12.8 ug/l 12.5 .102 80-120 <br /> VBenzene 12.2 0.5 „ 12.5 .97.6 80-120 <br /> oluene 12.1 0.5 12.5 '96.8 80-120 <br /> Ethylbenzene 12.3 0.5 12.5 98.4 80-120 <br /> LXylenes(total) 36.0 1.0 37.5 96.0 80-120 <br /> LCS Dup(AQC0022-BSD1) Prepared&Analyzed:03/05/07 <br /> ..Surrogate:Chlorobenzene 12.8 ug/l 12.5 102 80-120 <br /> LBenzene 12.2 0.5 12.5 197.6 80-120 0.00 20 <br /> Toluene 12.1 0.5 12.5 :'96.8 80-120 0.00 20 <br /> Ethylbenzene 12.3 0.5 12.5 .:98,4 80-120 0.00 20 <br /> °Xylenes(total) 36.t LO 37.5 '96.3 80-120 0.312 20 <br /> Atrix Spike(AQC0022-MSI) Source:0703016-01 Prepared:03/05/07 Analyzed:03/06/07 <br /> Surrogate:Chlorobenzene 13.1 ug/l 12.5 105 70-130 <br /> Benzene 12.4 0,5 12.5 ND `99.2 80-120 <br /> Toluene 12.2 0.5 12.5 ND '197.6 80-120 <br /> Ethylbenzene 12.6 0.5 12.5 ND 101 80-120 <br /> Xylenes(total) 37.6 1.0 37.5 0.5 "98.9 80-120 <br /> L <br /> Excelchem Environ-mental Lala The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This'analytical report must be reproduced in its entirety. <br /> Laboratory Representative Page 5 of <br />