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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/M-1 10/31/07 36 <0.50 <0.50 <0.50 8.5 <50 <50 TS/M-1 02/05/08 1.0 <0.50 <0.50 <0.50 <5.0 <50 <50 TS/M-1 05/07/08 4.3 <0.50 <0.50 <0.50 <5.0 <50 <50 TS/M-1 08/06/08 16 <0.50 <0.50 <0.50 5.2 <50 <50 TS/M-1 11/07/08 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 TS/M-1 02/04/09 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 TS/M-1 05/07/09 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 TS/M-1 08/06/09 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <50 TS/M-1 11/05/09 <0.50 -- -- -- <5.0 -- -- TS/M-1 02/02/10 <0.50 -- <5.0 -- -- - - TS/M-2 05/01/02 -- -- Not sampled due to SPH TS/M-2 07/29/02 -- -- -- -- -- -- -- SPH Sheen observed TS/M-2 10/30/02 <100 <100 <100 <100 <1,000 <10,000 <1,000 TS/M-2 02/24/03 -- -- -- -- -- -- -- SPH Sheen observed TS/M-2 05/27/03 SPH Sheen observed TS/M-2 08/04/03 SPH Sheen observed TS/M-2 11/03/03 SPH Sheen observed TS/M-2 02/24/04 Unable to access TS/M-2 05/24/04 Unable to access TS/M-2 08/17/04 SPH Sheen observed TS/M-2 11/15/04 SPH Sheen observed TS/M-2 02/15/05 SPH Sheen observed TS/M-2 05/16/05 SPH Sheen observed TS/M-2 08/31/05 SPH Sheen observed TS/M-2 12/02/05 <25 <25 <25 <25 <150 <2,500 <250 TS/M-2 02/07/06 16 <15 <15 <15 <70 <1,500 <150 TS/M-2 05/08/06 -- -- -- -- -- -- -- SPH Sheen observed TS/M-2 08/07/06 SPH Sheen observed TS/M-2 10/30/06 SPH Sheen observed TS/M-2 01/29/07 SPH Sheen observed TS/M-2 05/01/07 SPH Sheen observed TS/M-2 07/30/07 Not sampled due to SPH TS/M-2 10/29/07 Unable to access TS/M-2 02/04/08 Not sampled due to SPH TS/M-2 05/08/08 <9.0 <9.0 <9.0 <9.0 <50 <900 <90 TS/M-2 08/07/08 9.4 <9.0 <9.0 <9.0 <50 <900 <90 TS/M-2 11/07/08 <9.0 <9.0 <9.0 <9.0 <50 <900 <90 1 Q10 STTC gwtables.xlsx Page 70 of 77