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e <br />L <br />lil <br />Citation No. 03-10-07C-004 <br />1, NCYCC <br />Page 4 <br />1' <br />2 The Department has been aware of the presence of various organic chemicals in <br />3 NCYCC's active wells at concentrations less than their respective MCLs. In addition to <br />4 PCE, some wells have had sporadic detections of Trichloroethylene (TCE) and some <br />5 <br />unregulated organic chemicals, <br />6 <br />7 Subsequent to the most recent August 23, 2006 inspection of the facility by the <br />a Department, all four wells werelaced on <br />p quarterly monitoring for PCE and Vinyl <br />9 <br />10 <br />11 <br />12 <br />13 <br />14 <br />15 <br />16 <br />17 <br />18 <br />19 <br />20 <br />21 <br />22 <br />23 <br />24 <br />25 <br />26 <br />27 <br />COURT PAPER <br />LYAT[ Or CALIFORNIA <br />STC. 113 1REv. 13.721 <br />a5 "l— <br />Chloride. However, the monitoring results of March 26, 2007 were the first indication of <br />an exceedence of the PCE MCL in any of the active wells. All Vinyl Chloride results <br />have been non -detect. The following table shows the PCE detections within the past <br />several years: <br />HistoricalTetr• • - <br />i- • <br />Well No. 1 Well No, 2 <br />Well No, 3 <br />Well No, 4 <br />2.0 u9/1 (6/8/04) 1.6 ug/1 (3/9/04) <br />6.3 u9/1 (8/6103) <br />0.60 ug/1 (6/7/06) <br />0.60 ug/I (6/7/05) 5.2 u9/1 (6/8/04) <br />3.1 u9/10 1/13/03) <br />1.4 u9/1 (9/27/06) <br />1.4 ug/l (12/13/06) <br />1.2 ug/1 (12/6/05) 2.8 u9/1 (9/6/05) <br />3.9 ug/I (9/27/06) <br />1.8 ug/1 (3/1/06) 1.7 ug/1 (12/6/05) <br />17 u9/1 (2/21107) <br />1.3 (2/21/07)ug/1 <br />2.1 ug/1 (6/7/06)_ 5.4 ug/l (9/20/06) <br />17 ug/I (3/7/07) <br />1.6 ug/I (3/7/07) <br />Offline 3.9 ug/) {11/1/06) <br />16 ugll (4/12107) <br /><0.50 ug/1 (4112/07) <br />—offline 3.4 ug/I (2121/07) <br />—offline 2.9 ug/l (3/7/07) <br />-'offline 8.8 ug/I (4/12/x7) <br />"Well No. 1 has been offline due to mechanical problems since august 2006. <br />