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Superior Precision analytical, Inc. <br /> A member of ESSCON Environmental Support Service Consortium <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> Page 3 of 3 <br /> QA/QC INFORMATION <br /> SET: 15613 <br /> NA = ANALYSIS NOT REQUESTED <br /> ND = ANALYSIS NOT DETECTED ABOVE QUANTITATION LIMIT <br /> mg/kg = parts per million (ppm) <br /> OIL AND GREASE ANALYSIS By Standard Methods Method 5520F: <br /> Minimum Detection Limit in Soil: 50mg/kg <br /> Modified EPA SW-846 Method 8015 for Extractable Hydrocarbons: <br /> Minimum Quantitation Limit for Diesel in Soil: lmg/kg <br /> EPA SW-846 Method 8015/5030 Total Purgable Petroleum Hydrocarbons: <br /> Minimum Quantitation Limit for Gasoline in Soil: lmg/kg <br /> PA SW-846 Method 8020/BTXE <br /> Minimum Quantitation Limit in Soil: 0. 005mg/kg <br /> ANALYTE MS/MSD RECOVERY RPD CONTROL LIMIT <br /> ------------- <br /> Gasoline—Range: 98/86 13% 55-141 <br /> Benzene: 85/90 6% 67-141 <br /> Toluene: 90/92 2% 67-141 <br /> Ethyl Benzene: 80/85 6%- 67-141 <br /> Total Xylenes: 87/88 1- 67-141 <br /> f b <br /> Senior Chemist <br /> Certified Laboratories Account Manager <br /> 1555 Burke St Unit I San Francisco California 94124 • (41 5) 647-2081 / fax (41 5) 821-7123 <br />