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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-4 08/29/05 -- -- -- -- -- -- -- SPH Sheen observed TS-4 12/02/05 24 <0.50 <0.50 <0.50 130 <80 <80 TS-4 02/07/06 180 <15 <15 <15 <70 <1,500 <150 TS-4 05/08/06 -- -- -- -- -- -- -- SPH Sheen observed TS-4 08/07/06 -- -- -- -- -- -- -- SPH Sheen observed TS-4 11/01/06 45 <1.5 <1.5 <1.5 380 <150 <50 TS-4 01/29/07 -- -- -- -- -- -- -- SPH Sheen observed TS-4 05/01/07 -- -- -- -- -- -- -- SPH Sheen observed TS-4 08/02/07 180 <3.0 <3.0 <3.0 210 <300 <50 TS-4 11/01/07 130 <2.0 <2.0 <2.0 260 <500 <50 TS-4 02/06/08 270 <2.0 <2.0 <2.0 130 <200 <50 TS-4 05/08/08 280 <15 <15 <15 150 <1,500 <150 TS-4 08/07/08 240 <5.0 <5.0 <5.0 170 <500 <50 TS-4 11/07/08 200 <5.0 <5.0 <5.0 250 <800 <50 TS-4 02/05/09 240 <5.0 <5.0 <5.0 120 <500 <50 TS-4 04/16/09 -- -- -- -- -- -- -- Well Destroyed TS-4R 05/08/09 240 <20 <20 <20 130 <2,000 <200 TS-4R 08/07/09 270 <20 <20 <20 120 <2,000 <200 TS-4R 11/03/09 160 <10 <10 <10 150 <1,000 <100 TS-4R 02/03/10 150 <15 <15 <15 73 <1,500 <1,500 -- -- TS-4R 03/23/10 120 <15 <15 <15 <70 <1,500 <150 -- TS-5 05/09/01 <1.0 <1.0 <1.0 <1.0 <5.0 -- -- TS-5 08/30/01 <1.0 <1.0 <1.0 <1.0 <5.0 TS-5 11/06/01 <1.0 <1.0 <1.0 <1.0 <5.0 TS-5 02/07/02 76 <5.0 <5.0 <5.0 <10 -- -- TS-5 05/01/02 19 <0.50 <0.50 <0.50 <5.0 <100 <50 <0.50 <0.50 TS-5 07/30/02 16 <0.50 <0.50 <0.50 <5.0 <50 <5.0 -- -- TS-5 10/29/02 8.3 -- -- -- -- -- -- TS-5 02/25/03 0.55 <5.0 TS-5 05/28/03 0.53 -- TS-5 08/04/03 1.2 TS-5 11/04/03 0.67 TS-5 02/27/04 <0.50 TS-5 05/21/04 <0.50 TS-5 08/17/04 <0.50 TS-5 11/18/04 <0.50 1 Q10 STTC gwtables.xlsx Page 63 of 77