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1. .4: Summary of Groundwater Analytical Data - Zones George's Service 1680 Durham Ferry Road Tracy, California Wells Date Benzene Toluene Ethyl Total TPH MTBE DIPE ETBE TAME TBA 1,2-DCA EDB Ethanol Benzene Xylenes Gasoline ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L MW-102 05/05/97 219 497 160 959 9,000 ND<5 09/19/97 135 7.0 3.0 316 3,380 ND<2 ND<2 ND<2 ND<2 ND<100 ND<500 02/24/98 8.0 1.0 ND<.3 7.0 184 ND<2 05/29/98 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<2 11/13/98 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<5 ND<5 ND<5 ND<5 ND<50 04/28/99 0.8 2.4 1.4 6.3 ND<50 ND<5 09/01/99 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<5 12/22/99 ND<.5 ND<.5 ND<.5 ND<.5 ND<50 N/A 03/31/00 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N0<2 06/20/00 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<2 09/20/00 0.3 0.4 0.3 2 ND<50 ND<2 12/27/00 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<2 03/06/01 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<2 06/20/01 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N/A 09/07/01 ND<.3 ND<.3 ND<.3 NO<.3 ND<50 ND<2 12/03/01 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<2 02/22/02 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<2 06/05/02 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<2 09/11/02 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<2 12/26/02 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 N/A 03/21/03 ND<.3 NDe.3 ND<.3 ND<.3 ND<50 ND<1 06/06/03 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<1 09/05/03 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<1 01/03/04 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<1 04/27/04 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<1 07/23/04 ND<.3 ND<.3 NO<.3 ND<.3 ND<50 ND<1 11/03/04 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 ND<1 01/21/05 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 04/11/05 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 07/20/05 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 10/30/05 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 01/22/06 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 04/28/06 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 08/02/06 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 10/13/06 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 02/07/07 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 04/13/07 ND<0.5 ND<0.5 ND<0.5 ND<1 N0<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 07/16/07 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 10/10/07 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 01/29/08 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 04/21/08 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 07/09/08 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 10/23/08 Not Sampled 01/23/09 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 06/30/09 Not Sampled 11/06/09 ND<0.5 1 ND<0.5 I ND<0.5 I ND<1 I ND<50 I ND<0.5 I ND<0.5 1 ND<0.5 I ND<0.5 I ND<5 I ND<0.5 I ND<0.5 I 04/26/10 Not Sampled 10/22/10 ND<0.5 I ND<0.5 I ND<0.5 I Noel 1 ND<50 1 ND<0.5 1 ND<0.5 1 ND<0.5 1 ND<0.5 I ND<5 1 ND<0.5 I ND<0.5 I 04/26/11 Not Sampled 04/16/12 Not Sampled 10/18/12 Not Sampled 01/22/13 Not Sampled 04/25/13 ND<0.5 I ND<0.5 1 ND<0.5 I ND<1 I ND<50 1 ND<0.5 I I I - I - I ND<0.5 I - I - 08/05/13 Not Sampled 10/23/13 Not Sampled 06/30/14 ND<0.5 I ND<0.5 I ND<0.5 I ND<1 I ND<50 I ND<0.5 I - I - 1 - I - IND<0.5 I - I - 09/10/14 Not Sampled 11/20/14 Not Sampled 01/05/15 Not Sampled 04/08/15 Not Sampled 07/29/15 Not Sampled 10/05/15 Not Sampled 01/07/16 Not Sampled 04/19/16 Not Sampled 08/01/16 Not Sampled 11/08/16 ND<0.5 I ND<0.5 I ND<0.5 1 ND<1 I NDc50 1 ND<0.5 I - I I - i - I ND<0.5 I I Ground Zero Analysis, Inc. 1 of 4 8/16/2017