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man <br /> TABLE 9-D <br /> METHOD USED TO CALCULATE REPRESENTATIVE CHEMICAL CONCENTRATIONS <br /> IN ENVIRONMENTAL MEDIA <br /> SOIL CONCENTRATIONS (ppb)(1) <br /> Background <br /> G-6 G-7 G-8 G-9 AS-1A AS-4A G-10 G-11 G-12 G-13 G-14 G-15 G-16 G-17 G-18 <br /> Chemical <br /> Benzo-a-pyrene (.021 2.7 7.5 35 33 113 370 130 73 18.8 18.6 29.8 341 110 (1.4 <br /> Benzo(ghi)perylene (.79 77 (40 1200 720 (200 (39 (390 3000 588 790 874 2300 940 130 <br /> I <br /> Naphthalene (63 (3200 (3200 (16000 (16000 (16000 (2800 (28000 (28000 (2800 (2800 (2800 (28000 (28000 (2800 <br /> i <br /> Representive Concentration of <br /> Benzo-a-pyrene - (2.7 + 7.5 + 35 + 33 + 113 + 370 +130 + 73 + 18.8 + 18.6 + 29.8 + 341 + 110 + 13 <br /> - 1,282.40 + 13 - 98.64 ppb - 0.099 ppm (2) <br /> Representative Concentration of <br /> Benzo(ghi)perylene - 77 + 1200 + 720 + 3000 + 588 + 790 + 874 + 2300 + 940 + 130 + 10 <br /> - 10,619.00 + 10 <br /> 1061.90 ppb - 1.06 ppm(3) <br /> Representative Concentration of <br /> Napthalene - 0(4) <br /> 1 Surface soil samples were obtained in May 1989 by Dames i Moore. <br /> 2 Mean concentrations were calculated using detected values only. Samples G-6 and G-18 were not included in the calculation of the mean <br /> concentration of benzo-a-pyrene because benzo-a-pyrene was not detected in either of these samples. <br /> 3 Mean concentrations were calculated using detected values only. Samples G-6, G-8, AS-4A, G-10, and G-11 were not included in the mean <br /> concentration calculation. <br /> 4 The respresentative concentration of napthalene was taken as zero because napthalene was not detected in any of the soil samples. <br /> CK/0811d <br />