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Table 3e - STLC WET EPA200.7 - Beard Property Regulatory Limit mg/l Analyte Sample Identification T-65-1.5 T-65-3.5 5 Lead 5.5 0.62 Table 3e - STLC WET EPA 200.7 - Beard Property Lead Mean 3.06 Standard Error 2.44 Median 3.06 Mode #N/A Standard Deviation 3.450681092 Sample Variance 11.9072 Kurtosis #DIV/0! Skewness #DIV/0! Range 4.88 Minimum 0.62 Maximum 5.5 Sum 6.12 Count 2 Confidence Level (80.0%) 7.509550414 Waste within the Beard property has an average total lead concentration of 25.3 parts per million ppm). The statistical analysis shows an 80% confidence level of 10.77 to 39.83 ppm. The California regulatory limit (TTLC) for lead is 1000 ppm. Based on a two-tailed normal distribution, it is likely that total concentration of lead in the fill areas does not exceed the TTLC. The average STLC for lead is 3.06 ppm. The statistical analysis shows an 80% confidence level of –4.45 to 10.57 ppm. The California regulatory limit STLC for lead concentration is 5 ppm. Based on a two-tailed normal distribution, it is likely that the total soluble lead concentration in the fill areas does exceed the STLC. The average total arsenic concentration is 30,000 ppm. The statistical analysis shows an 80% confidence level of –19132.35 to 79,132.35 ppm. The California regulatory limit (TTLC) for arsenic is 500 ppm. Based on a two-tailed normal distribution, the total concentration of arsenic in the fill area does exceed the TTLC. The sample, T-65.3.5 was taken at a depth of 3.5 feet below ground surface in Trench T-65. Sample T-65-1.5 was taken at 1.5 feet below ground surface and analytical results of this sample in Table 3, above, indicates 0 ppm of arsenic. It is likely that the presence of arsenic as indicated in sample T-65-3.5 is an anomaly and therefore its presence may be in an isolated area of the waste.