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Environmental Laboratories 42501 Albrae Street Fremont, CA 94538 Phone (510) 623-0775 (800) 247-5223 FAX (510) 651-9754 ANALYSIS REPORT Attention: Mr. Greg Stahl RESNA 1710 Main Street Escalon, CA 95320 Project: AGS 19509-I, Project #W0381 Comgan Property Benzene Toluene DO RPb Detection Ltmit: OS 0.5 SAMPLE Laboratory Identification MACOMA Working to Restore Nature 10201abAm Date Sampled: 04-09-92 Date Received: 04-10-92 BTEX Analyzed: 04-14-92 TPHg Analyzed. 04-14-92 TPHd Analyzed: 04-18-92 Matrix: Water Ethyl- Total benzene Xylenes TPHg TPHd P12h Ili P12h p9h 0.5 0.5 50 100 CP MW -1 ND ND ND ND ND ND W1204380 CP MW -2 ND ND ND ND ND ND W1204381 CP MW -3 ND ND ND ND ND ND W1204382 ppb = parts per billion = ug/L = micrograms per liter ND = Not detected Compound(s) may be present at concentrations below the detection limit NR = Analysts not requested ANALYTICAL PROCEDURES BTEX— Benzene, toluene, ethyibenzene, and total xylene isomers (BTEX) are measured by extraction using EPA Method 5030 followed by analysis using EPA Method 8020/602, which utilizes a gas chromatograph (GC) equipped with a photoroniratton detector (PID) and a flame -ionization detector (FID) in sones TPHg—Total petroleum hydrocarbons as gasoline (law-to-medcum boiling points) are measured by extraction using EPA Method -'%W, followed by analysis using modified EPA Method 8015, which utilizes a GC equipped with an FID TPHd—Total petroleum hydrocarbons as diesel (high boding points) are measured by extraction using EPA Method 3550 for soils and EPA Method 3510 for followed by modified EPA Method 8015 with direct sample injection into a GC equipped with an FID W Aorxl 21. 1992 Laboratory Representative Date Reported RESNA Environmental Laboratory IS CERTIFIED BY THE STATE OF CALIFORNIA DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY (Certification No 1211)