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MA TR"ENVIRONMENTAL LARORA TORIES <br /> 3017 KILGORE ROAD X1100 RANCHO CORDOVA CA 95742 PHONE(916)635-3962 FAX(916)635-9331 <br /> ANALYSIS BTEX SPIKE SUMMARY <br /> CLIENT: Western GEo Engineering <br /> CONTACT: G. Converse Date Sampled: N/A <br /> COC No: 4733 Date Received: N/A <br /> Project No: R 603 Date Extracted: N/A <br /> Sample ID: N/A Date of Analysis: 10/28/94 <br /> Lab ID: MS/MSD Matrix: WATER <br /> CONC CONC PERCENT <br /> COMPOUND SPIKED MEASURED RECOVERY <br /> ug/L MS MSD MS MSD RPD <br /> (ppb) <br /> BENZENE 11 . 76 10. 87 10. 45 92% 89% 4% <br /> TOLUENE 17 . 92 1.6 . 54 16 . 12 92% 90% 3% <br /> ETHYLBENZENE 13 . 80 12 . 57 11. 98 91% 87% 5% <br /> TOTAL XYLENES 35. 28 33 . 11 32 . 03 94% 91% 3% <br /> MS= MATRIX SPIKE <br /> MSD= MATRIX SPIKE DUPLICATE <br /> RPD= RELATIVE PERCENT DIFFERENCE <br /> CONC= CONCENTRATION <br />