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Table A. Statistics of Metals Data and C PCD termination Pittman Elementary School T O e ry CONSTITUENT Antimony Arsenic Barium Beryllium Cadmium Chromium Cobalt Copper Lead ercufy olybdenum Nickel Selenium Silver Thallium Vanadium Zinc ( [Sample ID Date c L1-S 8/6/2003 0.31 9.9 340 0.54 0.39 62 20 45 80 0.097 0.59 53 0.88 0.50 0.99 72 100 L1-D 8/6/2003 NA 6.0 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 1-3-8 8/6/2003 0.40 9.4 350 0.55 0.077 67 22 50 51 0.130 0.49 58 0.95 0.58 1.1 88 89 L3-D 8/6/2003 0.34 8.3 420 0.91 0,078 97 26 69 39 0.210 0.35 76 0,97 0.47 1.1 130 100 L5-S 8/6/2003 NA 7.7 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA L7-S 8/6/2003 0.38 15 310 0.63 0.070 73 20 47kN 3 0.087 0.46 55 0.87 0.32 0.98 89, 210 L7-S 8/6/2003 NA 14 NA NA NA NA NA NAA NA NA NA NA NA NA NA NA 1-7-D 8/6/2003 NA 4.3 NA NA NA NA NA NAA NA NA NA NA NA NA NA NA LD-S 8/6/2003 0,32 52 440 0,48 0.15 71 17 498 0.057 0.34 52 0.92 0,47 1.0 78 120 1-9-D 8/6/2003 0.31 5.8 390 0.92 0.072 81 19 493 0.600 0.33 60 0.89 0.34 1,0 96 73 L11-S 8/612003 NA 7.6 NA NA NA NA NA NAA NA NA NANA NA NA NA NA L13-S 8/6/2003 NA 8.2 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA L15-3 8/6/2003 0.30 7.6 220 0.20 0.070 51 16 37 59 0.120 0.33 40 0,87 0.50 0,98 60 90 L16-S 8/6/2003 0.30 7.5 220 0.20 0.069. 52 15 37 58 0.120 0.35 41 0.86 0.47 0.97 59. 100 Total Number of Samples=n 8 14 8 8 8 8 8 8 8 8 8 8 8 8 8 8. 8 Number of Detects 2" 14 8 8 2 8 8 8 8 8 5 8 0 8 0 8 8 Frequency of Detection 25.0% 100.0% 100.0% 100.0% 25,0% 100.0% 100,0°/a 100.0% 100.0% 100.0% 62.5% 100.0% 0.0% 100.0% 0.0% "100.0% 100.0% Maximum 0,40 15.0 440.0 0.9 0.4 97.0 26.0 69.0 80.0 0.6 0.6 76.0 1.0 0.6 1.1 130.0 210.0 Minimum 0.30 4.3 220.0 0.2 0.1 51.0 15.0 37.0 13.0 0.1 0.3 40,0 0.9 0.3 1.0 59.0 73.0 Arithmetic Mean 0.33 8.32 336.25 0.55 0.12 69.25 19.38 47.88 53.88 0.18 0.41 54.38 0,90 0.46 1.02 84.00 110.25 Standard Deviation 0,04 1 3.04 83.31 0.27 0.11 15.18 3.54 9.99 20.39 0,18 0.10 11.38 0.04 0.09 0.05 1 22.93 42.44 Coeff.Variation 0.11 0.37 0.25 0.49 0.92 0.22 0.18 0.21 0.38 0.99 0.24 0.21 0,05 0.19 0.05 0,27 0,38 Geomean 0.33 7.86 326.35 0,48 0.10 67.84 19.10 47.04 48.44 0.14 0.40 53.36 0.90 0.45 1.01 81.48 104.96 Wilcoxon Rank Sum(p) >0.097 not applicable 0.014 <0.010 >0.097 <0.010 0.010 0.025 >0.097 >0.097 X0.097 <0.010 >0.097 >0.097 >0.097 0.041 >o.097 Wilcoxon Rank Sum(a=0.05) 0.050 not applicable 0.050 0.050 0.050 0,050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 Wilcoxon Rank Sum(Zrs) -1.689 1 0.290 2.215 2.524 -0.894 2.631 2.324 1.949 -1.156 1.210 0,000 2.530 -2.158 -1.900 -2.323 1.735 0.159 Wilcoxon Rank Sum(Z,-a) 1.645 1.645 1.645 1.645 1.645 1.645 1.645 1.645 1.645 1,645 1,645 1,645 1,645 1.645 1.645 1.645 1'.645 Highest Site cone. >Highest background cone.? no yes yes yes yes yes yes yes no yes yes yes no es no es` yes Wilcoxon Rank Sum Test, p<a? not applicable yes yes no yes yes yes no no es no yes no Wilcoxon Rank Sum Test,Zrs>Zl-d no Chemical of Potential Concern? NO NO YES YES NO YE5 YES YES NO NO NO YES NO NO NO YES NO Background Samples B1 8/6/2003 0.33 8.9 260 0.38 0.077 58 19 47 61 0.100 0.35 47 0.95 0.52 1.1 70 95 62 8/6/2003 0.35 6.5 240 0.27 0.080 58 16 41 46 0.051 0.36 46 0.99 0.54 1A 74 84 B3 8/6/2003 0.40 7.6 250 0.26 0.093 62 16 44 91 0.087 0.5 47 1.2 0,57 1.3 73 120 134 8/6/2003 0.41 7.1 220 0.17 0,075 46 15 39 120 0,140 0.34 35 0.93 0.56 1.1 65 100 65 8/6/2003 0.39 13 230 0.30 0.076 51 18 40 92 0.054 0,34 40 0.93 0.52 1.1 70 120 66 8/6/2003 0.32 6.5 210 0.17 0.074 40 13 35 41 0.100 0.33 31 0.91 0.49 1.0 60 88 87 8/6/2003 0.32 6.3 260 0.18 0.083 45 1 14 40 200 1 0.150 0.43 40 0.90 1 0.48 1 1.0 54 1 140 88 8/6/2003 0.35 6.4 210 0.13 0.081 36 14 32 46 0.061 .0.39 28 1 A 0.48 1.1 61 81 Total Number of Samples=n 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 ' 8 Maximum 0.41 13 260 0.380 0.093 62 19 47 200.0 0.15 0.5 47 1.20 0.570 1.30 74 140 Minimum 0.32 6.3 210 0.130 0.074 36.0 13.0 32.0 41.0 0.05 0.330 28.0 0.900 0.480 1.000 54 81 Arithmetic Moan=X 0.36 7.79 235.00 023 0.08 49.50 15.63 39.75 87.13 0.09 0.38 39.25' 0.98 0.52 1.10 65.88 103.50 All concentrations listed are in milligrams per kilogram(mg/kg), parts per million. Method detection limit(MDL)value was substituted for"ND"for statistical purposes, NA: Not analyzed for this constituent Wilcoxon Rank Sum Test described in Selecting Inorganic Constituents as Chemicals of Potential Concern at Risk Assessments at Hazardous Waste Sites and Permitted Facilitie�1997)" wilcoxon.xls(summary)