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4. Page 4-2 Section 4 . 1. 4 , Paragraph 1 Sentence 1 This sentence should read "an ecological assessment . . . on plants and animals, exclusive of domesticated species. " S. Page 4-2 . Section 4 . 1.4 . Bullet 3 Explain what is meant by remediation criteria. Please give examples. 6. Page 4-3. Section 4.2. Heading This heading should read "baseline risk assessment approach. " 7. Page 4-3 . Section 4.2. 1. Paragraph 1 Since DDRW-Tracy is now preparing the draft final OU No. 1 RI report, it is not clear what additional data needs exist for OU #1, as stated in the text. Revise the text to explain this statement. S. Page 4-3 Section 4 .2 . 1. Paragraph 1 Explain the intent of the Phase I sampling. 9. Page 4-3 Section 4 .2. 1 Paragraph 1 The Detailed Risk Assessment Plan (DRAP) is not standard risk assessment terminology and to avoid confusion should not be used. The reviewer suggests that revised risk assessment work plan be used in its place. This revised work plan will account for site-specific data collected in Phase I. Thus sentence three should read "the overall risk assessment approach . . . a revised risk assessment work plan . of Phase I RI data" and sentence four should read "the revised risk assessment work plan will provide detailed information on site-specific characteristics . . . human health and ecological assessment. " 10. Page 4-4 Section 4 .2.3 . Paragraph 2 Other guidance that should be used for conducting the BRA include: CERCLA Compliance with Other Laws Manual, EPA 1988 ; Superfund Exposure Assessment Manual, EPA 1988 ; Human Health Evaluation Manual Supplemental Guidance: "Standard Default Factors" , EPA May 1991; Draft Risk Assessment Guidance for Superfund Ecological Assessments/Region IX, EPA 1989 ; and other guidance, and directives, such as Selection Criteria for Mathematical Models Used in Exposure Assessments: Ground-Water Models, EPA 1988. II-3