ARCHIVED REPORTS_2002 - Laserfiche WebLink

Home Browse Search

Table 3e - STLC WET EPA200.7 - Beard Property Regulatory Limit Analyte Sample Identification mg/I T-65-1.5 T-65-3.5 5 Lead 5.5 1 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! Ran a 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 2533 parts per million (ppm). The statistical analysis shows an 80% confidence level of 1 _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 m. 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 0 0 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 m. 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 like thaf the resence o icated in samle T-65-3.5 is an a omal and therefore its presence may be in an isolated area of the waste. n