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SPECIFIC COMMENTS <br /> 6) Page 4-1/Section 4 . 1. 1: <br /> The paragraph is ambiguous in defining the contaminants that <br /> are considered part of OU - 1. The ROD authors need to <br /> establish a consistent definition of the contaminants that are <br /> part of OU - 1. The ROD should further state the <br /> determinations that will be made regarding other contaminants <br /> in the ground water. <br /> 7) Page 4-1/Section 4 . 1.2 : <br /> The paragraph establishes criteria for further investigation <br /> of soil contamination. The ROD should also state what is <br /> planned for additional ground water contamination. <br /> 8) Page 4-2/Section 4 .2 . 2 : <br /> This section establishes cleanup level for primary <br /> contaminants that make up OU - 1; trichloroethene (TCE) ; <br /> tetrachloroethene (PCE) ; and 1, 1 dichloroethene. Other <br /> contaminants and the investigations planned for them are also <br /> discussed. How they interact with OU - 1 should be included <br /> in the ROD. <br /> This paragraph is a more complete definition of OU - 1 and <br /> should be moved to the front of this section as a consistent <br /> definition of OU - 1. See first comment of this section. <br /> 9) Page 6-1/Section 6. 1. 2 : <br /> This section establishes the constraints of the Risk <br /> Assessment (RA) for OU - 1 and how pathways not considered <br /> will be picked up in the ongoing site wide remedial <br /> investigation/feasibility study (RI/FS) . The discussion, as <br /> written, leaves the implication that OU -1 will be the extent <br /> of ground water investigations. As this is not so, it should <br /> be reflected in the discussion. <br /> -2- <br />