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4 — (92/ Sequoia 404 N. ,CA Lane <br /> Walnut Creek,CA 94598 <br /> Analytical FAX <br /> 5)988-9600 <br /> (925)988-9673 <br /> Roy F. Weston, Inc. Client Project ID: Home Depot, Tracy Sampled: May 12, 1999 <br /> 2300 Clayton Rd., Ste 1580 Sample Descript: Water, GW-1 Received: May 13, 1999I!. <br /> Concord, CA 94520 Analysis Method: EPA 8260 Analyzed: May 20, 1999.:' <br /> :...Attention: Scott Lookingbill Lab Number: 905-0775 Reported: Jun 2, 1999:::: <br /> CC Batch Number: MS0519998260S2A <br /> Instrument ID: GC/MS-2 <br /> VOLATILE ORGANIC COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> Ng/L Ng/L <br /> p-Isopropyltoluene............................................................ 2.0 ..................................... N.D. <br /> Methylenechloride............................................................ 10 ..................................... N.D. <br /> Naphthalene...................................................................... 10 ..................................... N.D. <br /> n-Propylbenzene............................................................... 2.0 ..................................... N.D. <br /> Styrene.............................................................................. 2.0 ..................................... N.D. <br /> 1,1,1,2-Tetrachloroethane................................................. 2.0 ..................................... N.D. <br /> 1,1,2,2-Tetrachloroethane................................................. 5.0 ..................................... N.D. <br /> Tetrachloroethene............................................................. 2.0 ..................................... N.D. <br /> Toluene.............................................................................. 2.0 ..................................... N.D. <br /> 1,2,3-Trichlorobenzene..................................................... 10 ..................................... N.D. <br /> 1,2,4-Trichlorobenzene..................................................... 10 ..................................... N.D. <br /> 1,1,1-Trichloroethane........................................................ 2.0 ..................................... N.D. <br /> 1,1,2-Trichloroethane........................................................ 2.0 ..................................... N.D. <br /> Trichloroethene................................................................. 2.0 ..................................... N.D. <br /> Trichlorofluoromethane.................................................... 2.0 ..................................... N.D. <br /> 1,2,3-Trichloropropane..................................................... 5.0 ..................................... N.D. <br /> 1,2,4-Trimethylbenzene.................................................... 2.0 ..................................... N.D. <br /> 1,3,5-Trim ethyl benzene.................................................... 2.0 ..................................... N.D. <br /> Vinylchloride..................................................................... 2.0 ..................................... N.D. <br /> Total-Xylene....................................................................... 2.0 ..................................... N.D. <br /> Surrogates Control Limit % % Recovery <br /> Dibromofluoromethane..................................................... 50 150..................................... 79 <br /> Toluene-d8........................................................................ 50 150..................................... 105 <br /> 4-Bromofluorobenzene..................................................... 50 150..................................... 93 <br /> Analytes reported as N.D.were not present above the stated limit of detection. <br /> SEQUOIA/ANALYTICAL, #1271 <br /> J - nne Fegley <br /> Project Manager Page 2 of 2 <br /> 9050775.RFW <8> <br />