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QUALITY ASSURANCE LABORATORY <br /> 6605 NANCY RIDGE DRIVE <br /> SAN DIEGO, CALIFORNIA 92121 <br /> ( 619 ) 552-3636 <br /> --------------------------------------------------------------------------- <br /> ADVANCED SCIENCES, INC. <br /> ATTN: LEN SINFIELD <br /> 4909 MURPHY CANYON RD . #500 <br /> SAN DIEGO, CA 92123 <br /> DATE OF REPORT AUGUST 28, 1991 <br /> DATE RECEIVED AUGUST 14 , 1991 <br /> DATE OF SAMPLE AUGUST 13, 1991 <br /> DATE COMPLETED AUGUST 26, 1991 <br /> ANALYZED BY VJ MC <br /> SAMPLE TYPE 3 SOIL <br /> PROJECT NAME FAA STOCKTON ATCT <br /> PROJECT NUMBER 9788-2240 <br /> ANALYSES RESULTS <br /> LOG NUMBER: 12144-91 12145-91 12146-91 <br /> ANALYSIS METHOD UNITS SAMPLE ID: SCK 11 (MIDDLE) SCK 12 (NORTH) SCK 13 (SOUTH) <br /> ---------------------------------------------------------------------------------------------------- <br /> TPH DNS MG/KG <10.0 <10.0 <10.0 <br /> BENZENE EPA 8020 UG/KG <1.0 <1.0 <1.0 <br /> TOLUENE EPA 8020 UG/KG <1.0 <1.0 <1.0 <br /> ETHYLBENZENE EPA 8020 UG/KG <1.0 <1.0 <1.0 <br /> XYLENE EPA 8020 UG/KG 0.0 0.0 0.0 <br /> TPN - TOTAL PETROLEUM HYDROCARBONS <br /> DHS - RECOMMENDED PROCEDURE FROM LEAKING UNDERGROUND FUEL TANK FIELD MANUAL, MAY 1988 <br /> i <br /> PETER SHEN <br /> LABORATORY DIRECTOR <br /> PS/ft <br /> QUALITY ASSURANCE <br /> LABORATORY <br />