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k <br /> TABLE 2-3 <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 subsul'face conditions) <br /> 2. is the site in an area that could- collect surface ; / <br /> runoff or 'intercept water from a source otter than ! i <br /> the natural precipitation? <br /> 3. Does the areal extent of sail contamination I � <br /> exceed .100 meters'? <br /> 4.- Do the concentrations of fuel constituents in any <br /> soil samples exceed the followingamounts: <br /> benzene:.- 100 ppm, toluene' ppm, xylene - 40 <br /> ppm, ethyl_ benzene. 40 ppm. ` <br /> 5. Are there, any.records or evidence of man-made or, <br /> I <br /> natural objects which could provide a conduit for, I <br /> vertical migration of leachate? <br /> 6. Doany- boring, or eycavation. 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 <br /> could be within 5 ft. -of highest ground water? v <br /> 8. bo, any„boring logs show the presence of a layer ofl 4/ <br /> material, 5.,ft_ .thick or more, which is more than ✓ ' <br /> 75% sand and/or "gravel? <br /> i ; <br /> Directions:.­ . <br /> . <br /> 1. Boring -logs taken during "the general risk appraisal <br /> can -be-used-to answer questions J-8. En addition, <br /> analytical results of the soil samples,,taken 'during <br /> the-,general_ risk-appraisal can be used to answer <br /> questions 3 .and 4. . <br /> .2 ,The ._,above, checklist contains" questi�rns which are <br /> designed_ to identify. . sites with environmental <br /> conditions whicjj.'_could produce a greater risk to <br /> - ground..water than. was modeled. The results of the <br /> general risk appraisal are host arp3.icable if all <br /> of the questions on the checklist can be answered <br /> "no” with reasonable certainty. If any of t:ie <br /> questions on the checklist cannot be answered "no", <br /> then the results of the general risk a raiszl may <br /> be less va i. <br /> -28- <br /> v <br />