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30. Section 4.2.4 EPA explained that it is important to include numbers to represent the aquifer cleanup target (i.e., the MCLS) rather than use text "less than." The State is not sure at this time if this will be a problem. 32. Section 4.2.5 The State has provided numbers for all the effluent treatment standards with the exception of dieldrin. The State agreed to provide a number for dieldrin. 33. Section 4.2.6 Rather than delete the statement that implies metals are naturally occurring, both the State and EPA agreed that the text should be replaced with "The Comprehensive RI/FS will evaluate whether or not metals concentrations are naturally occurring. 36. Table 4.2-2 EPA explained that DDRW tracy a\has agreed to include cancer risk numbers in the table EPA has recommended be included in this ROD, thus, obviating the need for Table 4.2-2. The State initially intended to discuss this action internally, but in later discussion during this conference call, the State concurred that this action would be acceptable. 38. Table 4.2-2 The State and EPA agreed (see summary above) that numbers would be provided for all effluent treatment standards. 39. Table 4.2-3 The State posed no objection to the requested revision to the footnote, per EPA's request. However, after discussion with the State, EPA has agreed to not request an effluent standard for arsenic. 40. Table 4.2-3 The State has agreed to include a number for dieldrin which will be set at the detection limit. 45. Section 5.2.8 The State believes that EPA's concern with this text can be satisfactorily addressed. EPA commented that the more important point which should be made in this section is that recent non-turbid samples have indicated elevated levels of metals in groundwater. 46. Section 5.2.14 The State indicated that they would concur with EPA's comment provided the data substantiates EPA's comment. EPA/R9 21 Jun 93 2/4