| OCR Text |
Show the action level for arsenic, concentrations ranged from 200 to 338 ppm and averaged 272 ppm. In the seven samples exceeding the action level for lead, concentrations ranged from 2250 to 18,000 ppm and averaged 5222 ppm. Four of the seven samples had detectable cadmium concentrations ranging from 2.5 to 5.9 ppm and averaging 4.3 ppm. Two of the seven samples had detectable selenium at 11 and 36 ppm. For the 10 post removal samples not exceeding the action levels, nine had detectable arsenic concentrations ranging from 3 .3 to 133 ppm and averaging 54.1. Lead concentrations ranged from 115 to 1480 and averaged 629 ppm. Cadmium was detected in six of the samples rangiJ)g from 1.2 to 6.9 ppm and averaging 4.0 ppm. Selenium was detected in three of the samples at 6.4, 10.0 and 21.5 ppm. Post removal sample analytical data are listed in Table 1. A total of 13 post reclamation and fill soil samples were collected from the Site and analyzed for total arsenic, cadmium, lead and selenium concentrations. Arsenic was detected in nine of the samples with concentrations ranging from 17 to 84.8 ppm and averaging 44.5 ppm. Lead was detected in eight of the samples with concentrations ranging from 26.5 to 115 ppm and averaging 53.6 ppm. Cadmium was detected in two of the samples at 0.5 and 0.7 ppm. Selenium was detected in nine of the samples with concentrations ranging from 5 to 25.1 ppm and averaging 15 .1 ppm. Post reclamation and fill soil sample data are listed in Table 3. --... SPLP ANALYTICAL RESULTS All 17 post removal samples were analyzed by the SPLP for arsenic, barium, cadmium, chromium, lead, silver and selenium concentrations. None of the samples exceeded the RCRA TC limits for any of the analytes. Arsenic was detected in four of the samples at 0.02, 0.05, 0.07 and 0.1 ppm and cadmium was detected in three samples at 0.07, 0.034 and 0.337 ppm. Lead was detected in six of the samples with concentrations ranging from 0.07to 0.7 ppm and selenium was detected in one sample at 0.2 ppm. SPLP analytical data are listed in Table 2. SITE STATUS A total of 3500 yards 3 of contaminated soil were remo ved from the Site and taken to the WWTP Pond C for temporary storage. The soil will ultimately be mixed with WWTP sludge and disposed of in the Arthur Step-Back Repository. Reclamation of the Site included covering the areas where contaminated soil was left in place with at least 18 inches of clean soil as well as other disturbed areas where soil stabilization was needed. No further action is planned and the Site is now considered closed. MOl prpt.wpd * 3 June 10, 1997 Rev . 0 |
