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F ENSR Project#5555-411-100 eg 1615-1650 19th Ave West Tracy, Califomia r TEG PROJECT#90208C I QA/QC DATA - MATRIX SPIKE ANALYSES- SOIL (Sample#SB-4) ANALYZED: 2/8/99 SPIKED MEASURED % i COMPONENT CONC. CONC. RECOVERY i 1,1 DICHLOROETHANE (mg/kg) 0.0100 0.0086 86.0% ! cls- 1,2 DICHLOROETHENE (mg/kg) 0.0100 0.0104 104.0% CHLOROFORM (mg/kg) 0.0100 0.0097 97:0% 1,1,1 TRICHLOROETHANE (mg)kg) 0.0100 0.0100 100.0% CARBON TETRACHLORIDE (mg/kg) 0.0100 0.0112 112.0% 1,2 DICHLOROETHANE (mg/kg) 0.0100 0.0091 91.0% TRICHLOROETHENE (mg/kg) 0.0100 0.0108 106.0% TETRACHLOROETHENE (mg/kg) 0.0100 0.0098 98.0% 1,1,2,2 TETRACHLOROETHANE (mg/kg) 0.0100 0.0093 93.0% BENZENE (mg/kg) 0.0100 0.0080 80.0% TOLUENE (mg/kg) 0.0100 0.0095 95.0•/ ETHYLBENZENE (mg/kg) 0.0100 0.0116 116.0% XYLENES (mg/kg) 0.0300 0.0296 98.7% TRPH (mg/kg) 50.0 51.6 103.2% SPIKED MEASURED % RPD COMPONENT CONC. CONC. RECOVERY i 1,1 DICHLOROETHANE (mg/kg) 0.0100 0.0084 84.0% 2.4 cis- 1,2 DICHLOROETHENE (mg/kg) 0.0100 0.0110 110.0% 5.6% CHLOROFORM (mg/kg) 0.0100 0.0096 96.0% 1.0% 1,1,1 TRICHLOROETHANE (mg/kg) 0.0100 0.0101 101.0% 1.0% CARBON TETRACHLORIDE (mg/kg) 0.0100 0.0111 111.0% 0.9% 1,2 DICHLOROETHANE (mg/kg) 0.0100 0.0088 88.0% 3.4% TRICHLOROETHENE (mg/kg) 0.0100 0.0111 111.0% 2.7% TETRACHLOROETHENE (mg/kg) 0.0100 0.0110 110.0% 11.5 1,1,2,2 TETRACHLOROETHANE (mg(kg) 0.0100 0.0095 95.0% 2.1% BENZENE (mg/kg) 0.0100 0.0074 74.0% 7.8% TOLUENE (mg/kg) 0.0100 0.0089 89.0% 6.5% ETHYLBENZENE (mg/kg) 0.0100 0.0101 101.0% 13.8% XYLENES (mg/kg) 0.0300 0.0311 103.7% 4.9% I TRPH (mg/kg) 50.0 55.1 110.2% 6.6% ACCEPTABLE RPD LIMITS: 15% I ANALYSES PERFORMED IN TEG's DHS CERTIFIED MOBILE LAB ANALYSES PERFORMED BY: Mr. Leif Jonsson DATA REVIEWED BY: Mr. Mark Jerpbak / page i Transglobal Environmental Geochemistry 11350 Monier Park Place, Rancho Cordova, CA 95742 Phone: (916) 853-8010 Fax: (916) 853-8020