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Table 7 <br /> Recent Groundwater Oxygenate and Fuel Additive Analytical Data <br /> Stockton Terminals Technical Committee <br /> Port of Stockton <br /> Stockton, California <br /> Sample Sample MTBE DIPE ETBE TAME TBA Methanol Ethanol <br /> Identification Date (pg/L) (pg/L) (Ng/L) (pg/L) (Ng/L) (Ng/L) (Ng/L) Comments <br /> ARCO <br /> AR/MW-1A 05/07/09 570 <0.90 <0.90 16 1,100 <500 <50 <br /> AR/MW-1A 08/06/09 970 <2.5 <2.5 18 3,000 <500 <50 <br /> AR/MW-1A 11/05/09 480 <2.0 <2.0 8.7 1,400 <400 <50 <br /> AR/MW-1A 02/03/10 91 <0.50 <0.50 1.9 310 <80 ' <50 <br /> AR/MW-1B 05/07/09 88 2.8 <0.50 <0.50 1,600 <80 <50 <br /> AR/MW-1B 08/06/09 93 2.8 <0.50 0.64 1,500 -- -- <br /> AR/MW-1B 11/05/09 120 2.3 <0.50 0.79 1,600 <br /> AR/MW-1B 02/03/10 160 2.6 -- 0.95 1,800 -- -- <br /> AR/MW-3A 05/08/09 43 <15 <15 <15 1,400 <1,500 <150 <br /> AR/MW-3A 08/07/09 120 <15 <15 <15 1,700 <1,500 <150 <br /> AR/MW-3A 11/06/09 37 <15 <15 <15 1,200 <1,500 <150 <br /> AR/MW-3A 02/04/10 21 <15 <15 <15 590 <1,500 <150 <br /> AR/MW-5A 05/08/09 2,200 <6.0 <6.0 31 1,500 <1,500 <60 <br /> AR/MW-5A 08/07/09 8,300 <9.0 <9.0 99 2,200 <2,000 <200 <br /> AR/MW-5A 11/06/09 9,100 <20 <20 90 1,900 <2,000 <200 <br /> AR/MW-5A 02/04/10 4,000 <9.0 <9.0 41 1,300 <2,000 ' <90 <br /> AR/MW-5B 05/06/09 65 0.56 <0.50 <0.50 190 <80 <50 <br /> AR/MW-5B 08/05/09 46 0.81 <0.50 <0.50 630 <90 920 <br /> AR/MW-5B 11/06/09 37 0.59 -- -- 840 <100 <50 <br /> AR/MW-5B 02/02/10 56 0.72 -- -- 890 <200 ' <50 <br /> AR/MW-5C 05/06/09 42 0.76 <0.50 <0.50 7.3 <80 <50 <br /> AR/MW-5C 08/05/09 27 <1.0 <1.0 <1.0 110 <100 1,300 <br /> AR/MW-5C 11/06/09 12 0.82 <0.50 <0.50 7.4 <50 <50 <br /> AR/MW-5C 02/03/10 3.4 0.93 <0.50 <0.50 5.5 <50 <50 <br /> AR/MW-50 05/08/09 10,000 <20 <20 140 2,500 <5,000 <200 <br /> AR/MW-50 08/07/09 16,000 <15 <15 160 3,700 <4,000 <150 <br /> [AR/MW <br /> 11/06/09 13,000 <30 <30 120 4,000 <10,000 <300 <br /> -50 02/04/10 9,700 <20 <20 91 7,800 <4,000 ' <200 <br /> 1 Q1 0 STTC gwtables.xlsx Page 1 of 14 <br />