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E Table 2-1 13, <br /> 4 Leachin --ritial Analysis for GasoI -- and Diesel <br /> Usi, Total Petroleum Nydrocart (TPH) <br /> 3 and Benzene', Toluene, Xylene and Ethylbenzene (BTX&E) <br /> The following table wag designed to permit '�estimating the <br /> concentrations of TPH and BTX&E that can be.' left in place without <br /> threatening ground water. Three levels ofiTPH and BTX&E <br /> concentrations were derived (from modeling){ for sites which fall into <br /> categories of low, medium or high leaching ,potential . To use the <br /> table, find the appropriate description for:. each of the features. <br /> Score each feature using the weighting system shown at the top of <br /> each column. Sum the points for each column and total them. ,...Match <br /> the total points to the allowable BTX&E and TPH, levels . <br /> p S SCORE S it SCORE S SCORE <br /> SITE C 10 PTS C 9 ,PTS C 5 PTS <br /> 0 IF CON- Oj, IF CON- 0 IF CON- <br /> FEATURE P R DITION Rj DITION R DITION <br /> E IS MET E1is MET E IS MET <br /> Minimum Depth to >100 1, 51-100 r 25--50� <br /> Ground Water from the I' <br /> Soil Sample (feet) <br />+ Fractures in subsurface None Unknown Present <br /> (applies to foothills <br /> or mountain areas) I <br /> 3, <br /> ( I <br /> <10 ,�� 10--25 26-40\2, <br /> Average Annual ,c �,,,� <br /> Precipitation (inches) <br /> i, ij <br /> Man-made conduits wh.icli _ None unknown Present <br /> increase vertical �S v <br /> migration of leachate � I <br /> �t <br /> Unique site featured: None ; At least More <br /> recharge area, coarse � one than one <br /> soil, nearby wells, etc <br /> COLUMN TOTALS-TOTAL PTS ?G` f -' r } - 1 7 <br /> RANGE OF TOTAL POINTS 49pts or more 41 - 48 pts . 40pts or less <br /> MAXIMUM ALLOWABLE 1/50/50/50 . 3/. 3/1/1 NAS <br /> B/T/X/E LEVELS (PPM)I1 I I' <br />{ MAXIMUM GASOLINE 1000 'i }100 10 <br /> ALLOWABLE TPH <br /> LEVELS (PPM) DIESEL 10000 i. 1000 100 <br /> U1 If depth is gre;later than 5 ft. and less than 25 ft. , score 0 <br /> points. j <br /> If depth is 5 ft. or less, this table should not be used. <br /> \2 If precipitatiorn is over 40 inches,liscore 0 points. <br /> \3, T,evels for BTX&IE are not applicable at a TPH concentration of <br /> loppm, (gasoline) or 100ppm (diesel) !� (For explanation see step <br /> 6, page 27. ) <br /> 29 e <br />