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Appendix I Historical Groundwater Oxygenate and Fuel Additive Analytical Data Stockton Terminals Technical Committee Port of Stockton Stockton, California Sample Sample MTBE DIPE ETBE TAME TBA Methanol Ethanol 1,2-DCA EDB Identification Date (pg/L) (pg/L) (Ng/L) (pg/L) (Ng/L) (Ng/L) (Ng/L) (pg/L) (pg/L) Comments TS-8 08/09/06 <4.0 <4.0 <4.0 <4.0 40 <400 TS-8 11/01/06 <0.50 <0.50 <0.50 <0.50 68 <100 TS-8 01/30/07 <4.0 <4.0 <4.0 <4.0 34 <400 TS-8 05/01/07 1.6 <0.50 <0.50 <0.50 48 <50 -- TS-8 08/02/07 <0.90 <0.90 <0.90 <0.90 170 <90 <50 TS-8 11/01/07 <0.90 <0.90 <0.90 <0.90 95 <90 <50 TS-8 02/06/08 <2.5 <2.5 <2.5 <2.5 <15 <250 <50 TS-8 05/08/08 <5.0 <5.0 <5.0 <5.0 <25 <500 <50 TS-8 08/07/08 <1.5 <1.5 <1.5 <1.5 71 <200 <50 TS-8 e 11/06/08 <1.5 <1.5 <1.5 <1.5 53 <150 <50 TS-8 02/05/09 2.3 <1.5 <1.5 <1.5 67 <150 <50 TS-8 05/08/09 <0.50 <0.50 <0.50 <0.50 15 <50 <50 TS-8 s 08/07/09 <0.50 <0.50 <0.50 <0.50 86 <50 <50 TS-8 11/05/09 <0.50 <0.50 <0.50 0.67 94 <100 -- TS-8 02/03/10 <5.0 <5.0 <5.0 <5.0 <25 <500 -- -- -- TS-9 08/29/01 7.1 <1.0 <1.0 <1.0 <5.0 -- TS-9 02/07/02 <2.0 <5.0 <5.0 <5.0 <10 TS-9 05/01/02 -- -- -- -- -- -- -- SA(1,3) TS-9 07/30/02 1.5 <0.50 <0.50 <0.50 <5.0 <50 <5.0 TS-9 10/28/02 -- -- -- -- -- -- -- SA(1,3) TS-9 02/25/03 4.3 <5.0 TS-9 05/27/03 -- -- SA(1,3) TS-9 08/04/03 0.66 TS-9 11/03/03 - SA(1,3) TS-9 02/26/04 <0.50 TS-9 05/17/04 -- SA(1,3) TS-9 08/17/04 <0.50 TS-9 11/15/04 -- SA(1,3) TS-9 02/16/05 <0.50 TS-9 05/16/05 -- -- -- -- -- -- -- SA(1,3) TS-9 09/02/05 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 TS-9 12/02/05 -- -- -- -- -- -- -- SA(1,3) TS-9 02/07/06 <0.50 TS-9 05/09/06 <0.50 TS-9 08/08/06 <0.50 TS-9 10/30/06 - SA(1,3) TS-9 01/30/07 <0.50 1 Q10 STTC gwtables.xlsx Page 66 of 77