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Table 4e - STLC EPA WET 200.7 - Waller <br />McAnaly) Property <br />Regulatory <br />Limit <br />mg/l <br />Analyte Sample Identification <br />T-4-4 T-66-1 T-66-3 <br />5 Lead 0.23 7.5 3.4 <br />Table 4e - STLC WET EPA 200.7 - <br />Waller (McAnaly) Property <br />Lead <br />Mean 3.71 <br />Standard Error 2.104384312 <br />Median 3.4 <br />Mode #N/A <br />Standard Deviation 3.644900547 <br />Sample Variance 13.2853 <br />Kurtosis #DIV/0! <br />Skewness 0.379958017 <br />Range 7.27 <br />Minimum 0.23 <br />Maximum 7.5 <br />Sum 11.13 <br />Count 3 <br />Confidence Level (80.0%) 3.968067012 <br />Waste within the Waller (McAnaly) property has an average total lead concentration of 168.8 ppm. The <br />statistical analysis shows an 80% confidence level of 50.31 to 287.09 ppm. The California regulatory <br />limit (TTLC) for lead is 1000 ppm. Based on a two-tailed normal distribution, it is likely that total <br />concentration of lead in the fill areas does not exceed the TTLC. <br />The average STLC for lead is 3.71 ppm. The statistical analysis shows an 80% confidence level of –0.26 <br />to 7.68 ppm. The California regulatory limit STLC for lead concentration is 5 ppm. Based on a two- <br />tailed normal distribution, it is likely that the total soluble lead concentration in the fill areas does exceed <br />CCR, Title 22 hazardous waste limitations.