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TestAmerica ANALYTICAL TESTING CORPORATION 2960 FOSTER CREIG14TON DRIVE • NASHVILLE TENNESSEE 37204 800-765-0980 • 615-726-3404 FAX I IROJECT QUALITY CONTROL DATA oject Number: roject Name: EXXONNOBIL 7-3942 age: I aboratory Receipt Date: 12/ 4/04 Matrix Spike Recovery Note If Blank is referenced as the sample spiked, insufficient volume was received for the defined analytical batch for MS/MSD analysis on an true sample matrix Laboratory reagent water was used for QC purposes Analyte units Orig Val MS Val Spike Conc Recovery Target Range Q C Batch Spike Sample `------ --------- --------- ---------- --------- ------------ ---------- ------------ *•UST ANALYSIS** Benzene mg/l 0 230 3 07 2 50 114 54 - 160 3930 04-AIS9107 Toluene mg/l 0 485 3 36 2 50 115 51 - 157 3930 04-A189707 I Ethylbenzene mg/l 2 99 6 02 2 50 121 47 - 159 3930 04-AIS9707 BTEX/GRQ Surr , a,a,a-TFT Recovery 87 69 - 132 3930 VOA Surr 1,2-DCA-d4 Rec 103 73 - 127 356 VOA Surr 1 2-DCA-d4 Rec 77 73 - 127 7261 VOA Surr Toluene-d8 t Rec 97 79 - 113 356 VOA Surr Toluene-de it Rec 96 79 - 113 7261 VOA Surr, 4-BFB t Rec 89 79 - 125 356 VOA Surr, 4-BFB 16 Rec 105 79 - 125 7261 VOA Surr, DBFM t ReC 100 75 - 134 356 VOA Surr, DBFM % Rec 86 75 - 134 7261 *`METAL$`* Manganese, Dissolved mg/l 0 485 0 984 0 500 100 75 - 125 9052 '189962 Matrix Spike Duplicate Analyte units Orig Val Duplicate RPD Limit Q C Batch --------------- ------- ---------- ---------- ---------- ----- ---------- **UST PARAMETERS** Benzene mg/l 3 07 2 98 2 98 30 3930 Toluene mg/1 0 0005 c 0 0005 N/A 37 9102 • Toluene mg/l 3 36 3 32 1 20 37 3930 project QC continued W ww lestamencoinc corn TeslAmenca Analytical Testing Corporation I TestAmernca Drilling Corporation I TestArnenco Air Emission Corporation