ARCHIVED REPORTS_ANNUAL 2009 GROUNDWATER MONITORING AND SAMPLING REPORT

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TABLE 3 GROUNDWATER ANALYTICAL RESULTS (PAHs)""' ALDEN PARK Tracy, California Concentrations reported in µg/L 1 m r w 847 a v 40- Date QDate v m a v�' ' �• a Well 11D Sampled �' Q` 94 1 4P 4 6 6 7 8 5 b 9 5 5 6 6 6SCREENING WQO 20 --- 2100 0.04 0.0029 0.04 --- 0.04 0.4 0.0038 130 280 0.04 17 --- 210 LEVEL ESL 20 to 30 11 0.73 11 0.027 11 0.01411 0.029 11 0.10 11 0.029 12 0.35 11 0.0048 E2 8 11 3.9 11 0.048 11 17 12 4.6 11 2 11 MW-5 04/23/02 D 0.3 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0 1 <0.1 <0 1 <0.1 <0.1 <0.1 <0.1 - cont] 07/24/02 0.1 - <0.1 <0.1 <0.1 <0.1 <0.1 <0 1 <0.1 <0 1 <0.i <0.1 <0 1 <0.1 <0.1 .. <0.1 - <0.1 ( - -- -_ 07/24/02 D 0.2 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1------ <0 1 <0.1 <0.1 C0.1 <0.1 -. <0,1 11/25/02 0.2 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0 <0,1 0 1 <0.1 <0 1 -- 8 2 11/25/02 D 0.2 <0.1 <0.1 <0.1 <0.1 <o.l <o.l <a.l <o.l <o.l <0.1 0.9 <0.1 1.1 0.5 <0.1 03/11/03 0.2 ND ND ND ND ND ND ND ND ND ND 0.3 ND ND ND ND- 03....i,1/03 D0311/03 D 0.2 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 08/27/03 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 08/27/03 D <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0 1 <0,i <0,1 <0.1 <0.1 <0.1 <0.1 <0.1 <0 1 <0.1 02/18/04 Not sampled due to the presence of SPO/sheen 08/05/04 Not sampled due to the presence of SPO;oleophilic sock placed in well -- 02/23/05 Not sampled due to the presence of SPO; oleophilic sock placed in well 08/17/05 Not sampled due to the presence of SPO, oleophilic sock placed in well 02/16/06 Not sampled due to the presence of SPO; oleophilic sock placed in well - 08/01/06 Not sampled due to the presence of SPO; oleophilic sock placed in well 01/29/07 Not sampled due to the presence of SPO,oleophilic sock placed in well 05/08/07 Not sampled due to the presence of SPO;oleophilic sock placed in well 01/16/09 Not sampled due to the presence of SPO; oleophilic sock placed in well i MW-6 Well not sampled due to the presence of SPO 04/25/96 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND - - -- -_-_ - ---._. - -- - - - --- -- - NS 04/02/97 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS 07/08/97 ND ND ND ND ND ND ND ND 2.4 ND ND ND ND ND ND ND - _ - 1. 10/07/97 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND MW-7 -- _ 10/07/97 D ND ND ND ND ND.. ND ND ND ND --. . ... ND ND ND ND ND ND ND _ - -- - .. 01/30/98 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0 1 <0.1 <0.1 <0 1 <0.1 01/30/98 D <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0 1 <0.1 <0.1 <0.1 <0.l <Q 1 <0.1 <0.1 <0 1 <0.1 07/20/00 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <O.l <0.1 <0.1 <0.1 <0.1 <0.1 3 From Science to Solutions Page 4 of 13