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EXHIBIT 9 Leaching Potential Analysis for Gasoline and Diesel Using Total Petroleum Hydrocarbons (TPH) and Benzene, Toluene, Xylene and Ethylbenzene (BTX&E) The following table was designed to permit estimating the concentrations of TPH and BTX&E that can be left in place without threatening groundwater Three levels of TPH and BTX&E concentrations were derived (from modeling) for sites which fall Into categories of low, medium or high leaching potential To use the table, find the appropriate description for each of the features Score each feature using the weighting system shown at the top of each column Sum the points for each column and total them Match the total points to the allowable BTX&E and TPH levels S SCORE S SCORE S SCORE SITE C 10 PTS C 9 PTS C 5 PTS O IF CON- O IF CON- O IF CON- FEATURE R DITION R DITION R DITiON E IS MET E IS MET E IS MET Minimum Depth to X100 51-100 5 25-501' Ground Water from the Soil Sample (feet) Fractures in subsurface 10 None Unknown Present (applies to foothills or mountain areas) Average Annual <10 9 10-25 264012 Precipitation (inches) Man-made conduits which 10 None Unknown Present increase vertical migration of leachate Unique site features None 9 At least More recharge area, coarse one than one soil, nearby wells, etc COLUMN TOTALS—TOTAL PTS 20 + 18 + 5 - 43 RANGE OF TOTAL POINTS 49 pts or more 41 - 48 pts 40 pts or less MAXIMUM ALLOWABLE 1150150150 3/3/1/1 NA13 B/TIXIE LEVELS (mg/Kg) MAXIMUM LD SOLINE 1000 100 10 ALLOWABLE TPH IL LEVELS (mg/Kg) SEL 10000 1000 100 08220010 009 ' If depth is greater than 5 ft and less than 25 ft, score 0 points If depth is 5 ft or less, this table should not be used 2 If precipitation is over 40 inches, score 0 points 3 Levels for BTX&E are not applicable at a TPH concentration of 10ppm (gasoline) or 100ppm (diesel) (For explanation see step 6, page 27)