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levels (MCLS) need to be included in this table. FIELD SAMPLING PLAN (APPENDIX A) 52. Pages A-4 and A-6, Sections A.1.2.1.1.E and A.4.1.2 Section A.1.2.I.I.E calls for 10 background monitoring wells to be installed in Phase I; however, only seven background well locations are discussed in Section A.1.4.1.2 and displayed in Figure 3.9-1. • Please reconcile these background well numbers and locations between these sections of text and Figure 3.9-1. 53. Page A-15, Section A.4.4.1 The first samples taken from the HydroPunch II sampling tool and preserved for analysis should be those that are to be analyzed for volatile organic compounds (VOCs), so that they remain as undisturbed as possible. • Please verify that this is to be the field sampling procedure. 54. Page A-24, Section A.9.2 Metals and halogenated organics are not the universe of possible, or even likely, hazardous wastes at these under-ground storage tank (UST) and solid waste management unit (SWMU) sites. Aromatic hydrocarbons, pesticides, and dioxins are other likely hazardous wastes that may be present at particular sites. EPA's Toxicity Characteristic L6aching Procedure (TCLP) is another analytical method that should be utilized for determining hazardous wastes for disposal. • Please consider the universe of all likely hazardous wastes that may, or are likely to, be found at these sites and modify the sampling/analysis plan accordingly. 55: Page A-26, Section A.10.1.5.1 Please ensure that the lamp for the photoionization detector (PID) is at the correct voltage to detect the most toxic substances possible at the site. For instance, Radian Corporation detected vinyl chloride in a soil sample below the water table while drilling monitoring well LM30 in 1985. OAPP (APPENDIX B) 56. Although EPA Method 8310 is the analytical method described in Section 4.3.3.8.1 and in Table 4.3-1 to detect polyaromatic hydrocarbons (PAHs) in groundwater, no [7SEPA/R9 12 Apr 93 11/19