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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 SP/WC-1M 08/06/03 <0.50 SP/WC-1M 11/03/03 - SA(1,3) SP/WC-1M 03/04/04 <0.50 SP/WC-1M 05/17/04 -- SA(1,3) SP/WC-1M 08/19/04 <0.50 SP/WC-1M 11/15/04 -- SA(1,3) SP/WC-1M 02/16/05 <0.50 SP/WC-1M 05/16/05 -- SA(1,3) SP/WC-1M 08/31/05 <0.50 SP/WC-1M 02/07/06 <0.50 SP/WC-1M 05/11/06 <0.50 SP/WC-1M 08/10/06 <0.50 SP/WC-1M 10/30/06 -- SA(1,3) SP/WC-1M 01/30/07 <0.50 SP/WC-1M 05/01/07 -- SA(1,3) SP/WC-1M 08/01/07 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 SP/WC-1M 10/29/07 -- -- -- -- -- -- -- SA(1,3) SP/WC-1M 02/07/08 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 SP/WC-1M 05/05/08 -- -- -- -- -- -- -- SA(1,3) SP/WC-1M 08/05/08 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 SP/WC-1M 11/03/08 -- -- -- -- -- -- -- SA(1,3) SP/WC-1M 02/03/09 <0.50 <0.50 <0.50 <0.50 <5.0 SP/WC-1M 05/04/09 -- -- -- -- -- SA(1,3) SP/WC-1M 08/04/09 <0.50 SP/WC-1M 11/02/09 - SA(1,3) SP/WC-1M 02/04/10 <0.50 -- -- -- -- -- -- SP/WC-1S 02/14/01 <1.0 <1.0 <1.0 <1.0 <5.0 SP/WC-1S 08/24/01 <1.0 <1.0 <1.0 <1.0 <5.0 SP/WC-1S 02/08/02 <2.0 <5.0 <5.0 <5.0 <10 SP/WC-1S 05/01/02 -- -- -- -- -- -- -- SA(1,3) SP/WC-1S 07/31/02 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 SP/WC-1S 10/28/02 -- -- -- -- -- -- -- SA(1,3) SP/WC-1S 02/26/03 <0.50 SP/WC-1S 05/27/03 -- SA(1,3) SP/WC-1S 08/06/03 <0.50 SP/WC-1S 11/03/03 -- SA(1,3) SP/WC-1S 03/02/04 <0.50 1 Q10 STTC gwtables.xlsx Page 48 of 77