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C7 <br />Table 1f — STLC EPA WET 200.7 Results - Delta Funding (Lynch) <br />Regulatory LimitI Analyte <br />mg/I <br />Sample Identification <br />I I I T-1-15 T-1-2 T-16-4 T-6-4 T-7-6 T-8-1 <br />5 1 Lead 1 2.2 0.95 2.5 1.6 0.64 1.4 <br />Table 1f - STLC WET EPA200.7 - Analysis - Delta Funding (Lynch) Property <br />Lead <br />Mean <br />1.548333333 <br />Standard Error <br />0.290865567 <br />Median <br />1.5 <br />Mode <br />#N/A <br />Standard Deviation <br />0.712472222 <br />Sam le Variance <br />0.507616667 <br />Kurtosis <br />-1.333006712 <br />Skewness <br />0.14256605 <br />Range <br />1.86 <br />Minimum <br />0.64 <br />Maximum <br />2.5 <br />Sum <br />9.29 <br />Count <br />6 <br />Confidence Level 80.0% <br />0.429284069 <br />Waste within the Delta Funding (Lynch) property has an average total lead concentration of <br />54.89 parts per million (ppm). The statistical analysis shows an 80% confidence level of 30.92 to <br />7§M -ppm. The California regulatory limit (TTLC) for lead is 1000 m. <br />Based on a two -tailed normal distribution, it is likely that total concentration of lead in the fill <br />areas does not exceed the TTLC. <br />The average STLC for lead is 1.55 ppm. The statistical analysis shows an 80% confidence level <br />of 1.12 to 1.98 ppm. The California regulatory limit STLC for lead concentration is 5 ppm. <br />Based on a two -tailed normal distribution, it is likely that the total soluble lead concentration in <br />the fill areas does not exceed the STLC. <br />