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Samples from this well contained endosulfan(0.24 ug/1)in the third quarter of 1998,and low levels of <br /> b-BHC throughout the MRP. Historically,the maximum concentration of b-BHC detected was 0.23 <br /> ug/1 in November 1999. From November of 1994 to November of 1999, detections ofb-BHC ranged <br /> from 0.09 to 0.23 ug/l. From April 2002 to October of 2005, detections of b-BHC ranged from <br /> 0.083 to 0.1 ug/l, and was not detectable above 0.1 ug/l in October 2011 (Table 2). Concentrations <br /> of b-BHC appear to have decreased with time in well MW-3 as shown on Figure 8. <br /> Chlorinated herbicide compounds were detected only once within the 1998 sampling events in MW-1, <br /> MW-2,and MW-7,and were not detected in these wells through the four quarters of 1999(Table 2). <br /> Previous monitoring events reported frequent detections of dinoseb and sporadic detections of Silvex <br /> in MW-3 (Table 2). Dinoseb concentrations in MW-3 over the last three quarters of 1999 were <br /> consistent and ranged from 3.8 to 6.1 ug/l. Chlorinated herbicides were analyzed from MW-3 in <br /> October 2002 and all compounds were reported as ND. With RWQCB concurrence, chlorinated <br /> herbicides were removed from the MRP following 2002. <br /> CdG®4gtr11 7 ,D&m.M Co.fth,JV7n0J t <br />