Laserfiche WebLink
`moo, TABLE 2-2 `✓ <br /> GENERAL RISK APPRAISAL <br /> FOR PROTECTION OF WATER QUALITY: <br /> APPLICABILITY CHECKLIST YES NO <br /> 1. Is the site in a mountainous area? (shaded moist <br /> areas &/or areas with rocky subsurface conditions) <br /> 2 . Is the site in an area that could collect surface <br /> runoff or intercept water from a source other than V" <br /> the natural precipitation? <br /> 3 . Does the areal extent of soil contamination <br /> exceed 1000 feet2 ? <br /> 4. Do the concentrations of fuel constituents in any <br /> soil samples exceed the following amounts: ✓ <br /> benzene - 100 ppm, toluene - 80 ppm, xylene - 40 <br /> ppm, ethylbenzene - 40 ppm? <br /> 5. Are there any records or evidence of man-made or <br /> natural objects which could provide a conduit for <br /> vertical migration of leachate? <br /> 6. Do any boring or excavation logs show the presence <br /> of fractures, joints or faults that could act as a <br /> conduit for vertical migration of leachate? <br /> 7. Do any boring logs show that contaminated soil tj 2 <br /> could be within 5 ft. of highest ground water? VDJ <br /> 8. Do any boring logs show the presence of a layer of <br /> material, 5 ft. thick or more, which is more than <br /> 75% sand and/or gravel? <br /> Directions: <br /> 1. Boring logs taken during the general risk <br /> appraisal can be used to answer questions 5-8. In <br /> addition, analytical results of the soil samples <br /> taken during the general risk appraisal can be <br /> used to answer questions 3 and 4 . <br /> 2 . Lateral migration of constituents to problem areas <br /> should also be considered in questions 5-8 . <br /> 3 . The above checklist contains questions which are <br /> designed to identify sites with environmental <br /> conditions which could produce a greater risk to <br /> ground water than was modeled. The results of the <br /> general risk appraisal are most applicable if all <br /> of the questions on the checklist can be answered <br /> "no" with reasonable certainty. If any of the <br /> questions on the checklist cannot be answered <br /> "no" , then the results of the general risk <br /> appraisal may be less valid. <br /> 38 <br />