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�h TADZX 2-3 • 421-F L Alex ApMzd1AL R "OT"TION OF NATE QVLt�TALxTY: YES No i. !--ti ' ApFi�tllglL�TY CItE 2, xs the site in 4 mountainous area? (shaded moist areas i/or areas witt rocky subsurface conditions) 2. Is the site in an area that could collect surface runoff or intercept Water frog a source otner than, J the natural precipitation? 3. Does the areal extent of *oil contwaination I' exceed loo motors'? l e 4. Do the concentrations of fuel constituents in any soil samples exceed the following amounts: benzene - 100 ppm, toluene - 8o ppm. xylere - 40 PPm. ethylbenzene - 40 ppa. S. Are there any records or evide.1ce of ma,,-made or ' natural objects which coull provide a conduit for vertical migration of leachate? ' 6. Do any boring or excavation logs show the of fractures, Joints or faults that could actsasca ► conduit for vertical migration of leachate? 7. Do any boring logs show that contaminated soil could be within 5 ft. of highest ground wpter? �,' 8. Do any boring logs show the presence of a layer ofj material, 5 ft_ thick or more, which is more than 75% sand and/or gravel- Directions: _• Boring logs taken during the general risk appraisal can be used to answer questions 5-s. In addition, analytical results of the soil samples taken during the general risk appraisal can be Used to answer questions 3 and 4. '. Lateral migration of constituents to problem areas should also be considered in questions 5-8. 3 . The above cneckli%t contains questions which are designed to identify sites with environmental conditions which could produce a greater risk to ground water than was modeled. The results of the general risk appraisal are most applicable if all Of the questions on the checklist can be answered "no" with reasonable certainty. If any of the questions on the checklist cannot be answered "noir then the resuits of the general risk appraisal may be lass valid.