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m <br /> N WIN <br /> Tabla <br /> Leaching Potential Analysis for Diesel <br /> Using Total Petroleum Hydrocarbons(TPH) <br /> and bc.;izene, Toluene, Xylene and Ethylbenzene (BTX&E) <br /> The following table was designed to permit estimating the concentrations <br /> of TPH and BTX&E that can be left in place without threatening ground <br /> water. Three . levels of TPH and BTX&E concentrations were derived (from <br /> modeling) for sites which fall into catagories of low, medium or high <br /> leaching potential. To use the table, find the appropriate description <br /> for each of the features. Score each feature using the weighting system <br /> shown at the top cf each column. Sum the points for each column and total <br /> them. Match the tonal points- to the allowable BTX&E and TPH levels. <br /> S SCORE S SCORE S SCORE <br /> SITE C 10 PTS C 9 FTS C 5 FATS <br /> 0 IF CON- G IF CON- 0 IF CON- <br /> FEATURE R DITION R DITION R DITION <br /> E IS MET E IS MET E IS MET <br /> Minimum Depth to >100 51-100 .` 25-50\1 <br /> Ground Water from the <br /> Soil Sample (feet) "' <br /> F4ctiares in subsurface Ilona. Unknown Present <br /> (applies to foothills jp <br /> J <br /> r or mountain areas) <br /> Average Annudl <10 <br /> s" Precipitation (inches) 10-25 26-40 _Z <br /> a { <br /> Man-made conduits which N~ne Unknown present <br /> increase vertical �Q <br /> migration of leachate <br /> Unique site features; None At least More. <br /> recharge area, coarse ona than one <br /> soil., nearby wells, etc <br /> k <br /> COLUMN TOTALS-TOTAL PTS �C) + �8 .� _ <br /> RANGE OF TOTAL.POINTS 45pts or more 41 - 48 pts d0pts or less <br /> 1 <br /> MAXIMUM ALLOWABLE 1/50/50/50 .3/.3/] rl.. . <br /> B/T/X/E LEVELS (PPM) <br /> MAXIMUM,ALLOWABLE 10000 10.00 'PNA. <br /> TPH LEVELS-(PpH) - - - <br /> - <br /> If depth is greater than 5 ft. but less. tHan 25 ft. , score - <br /> } Ir. depth is 5 ft or ;Less, this table should not.be used. <br /> If precipitation is over 40 `inches, :score 0.points <br /> . ' <br /> it `3 Levels for BTX&E are not applicable at a TPH concentration of '100ppm <br /> a <br />