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TM Alpha Analytical Laboratories Inc. 0 860 Waugh Lane, H-1, Ukiah, California 95482 CHEMICAL EXAMINATION REPORT (707) 468-0401 Advanced Geo Environmental 4005 N. Wilson Way Stockton, CA 95205 Date Printed Page Attn: Kevin McKibben 4/07/98 7 Batch Number Receipt Date Client Client P.O. Send Via 98-0401-011 04/01/98 10:15 ADVGEO Mail METHOD EXTRACTED TEST DATE RESULT UNITS PQL DILUTION Batch 98-0401-011 consisted of 2 Samples and 12 Tests Sample 1 S-1,2,3 Composite 3:1 K & S Sample Type: Soil Sampled by: Michael Rauser Sampled: 3/30/98 16:15 The PQL's for Benzene, Toluene & Ethylbenzene are 6x and Xylenes lbx higher than usual due to matrix interferences. * Additional notes for this Sample are printed at the conclusion of the Results Report. TPH Gasoline W/BTXE TPH - Gasoline GCFID/5030 4/02 4/03/98 17 mg/kg 1.00 Benzene EPA 8020 4/02 4/03/98 ND mg/kg 0.030 Toluene EPA 8020 4/02 4/03/98 ND mg/kg 0.030 Ethylbenzene EPA 8020 4/02 4/03/98 ND mg/kg 0.030 Xylenes EPA 8020 4/02 4/03/98 ND mg/kg 0.090 Sample 2 S-4,5,6 Composite 3:1 K & S Sample Type: Soil Sampled by: Michael Rauser Sampled: 3/30/98 16:30 w The PQL's for Benzene, Toluene, & Ethylbenzene are 6x and Xylenes 16x higher than usual due to matrix interferences. • Additional notes for this Sample are printed at the conclusion of the Results Report. TPH Gasoline W/BTXE TPH - Gasoline GCFID/5030 4/02 4/03/98 50 mg/kg 1.00 — Benzene EPA 8020 4/02 4/03/98 ND mg/kg 0.030 Toluene EPA 8020 4/02 4/03/98 ND mg/kg 0.030 Ethylbenzene EPA 8020 4/02 4/03/98 ND mg/kg 0.030 Xylenes EPA 8020 4/02 4/03/98 ND mg/kg 0.090 r PQL - Practical Quantitation Limit ND - None Detected Indicates Detection Limit altered due to Sample Dilution NOTES: Bruce L. Gove Laboratory Director Date Printed: 4/07/98