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i 4 Analysis of the absolute amounts of certain organic chemicals found to be present(lab analyses performed by GeoAnalytical Labs of Modesto, CA, following EPA Procedure 8260B-GC/Mass Spec Analysis) in the contents of the 1,600 gallon septic tank on the property located at 24876 Suttenfield Road, Acampo, CA 95220-this property is owned by David K. &.Deborah R.Miller. Organic chemicals that are components of common vehicle gasoline Emp. Merck Index Tank Concentration Volume of Chemical in Tank No. Chemical Synonym Formula Number* µg/1 ppb(mass) Density,gm/cc in ml in teaspoons 1. benzene benzol C6116 1074 13 13 0.8787 0.0896 0.018 2. ethylbenzene none C$H10 3723 56 56 0.8660 0.3916 0.079 3. toluene toluol CHB 9455 182 182 0.8661 1.2726 0.258 4. m-xylene&p-xylene xylol C81416 9988 188 188 0.8654 1.3156 0.267 5. o-xylene xylol C8H10 9988 98 98 0.8601 0.6893 0.140 6. n-butylbenzene none C10H14 1549 2.3 2.3 0.8604 0.0162 0.003 7. sec-butylbenzene none CI01414 1550 1.0 1.0 0.8608 0.0070 0.001 8. isopropylbenzene cumene C9H 12 2619 3.9 3.9 0.8621 0.0274 0.006 9. p-isopropyltoluene cymene C lOH 14 2770 1.2 1.2 0.8610 0.0084 0.002 10. n-propylbenzene none C9H i 2 7856 13 13 0.8621 0.0913 0.019 11. 1,2,4,-trimethylbenzene pseudocumene C91412 7929 71 71 0.8761 0.4908 0.100 12. 1,3,5-trimethylbenzene mesitylene C9H12 5810 21 21 0.8637 0.1472 0.030 13, methyl t-butyl ether MTBE C5H120 5954 180 180 0.7404 1.4723 0.299 TOTALS = 6.0193 1.222 Organic chemicals that are NOT components of common vehicle gasoline Emp. Merck Indexi Tank Concentration Volume of Chemical in Tank No. Chemical Synonym Formula Number* µgA ppb(mass) Density,gm/cc in µl in teaspoons 14. 1 acetone none ii CAO 58 96 96 0.7880 0.7378 0.150 TOTALS 0.7378 0.150 * Merck Index, Eleventh Edition, Published by Merck& Co. 1989 ti +� I� 1