WORK PLANS - Laserfiche WebLink

Home Browse Search

Phase 11 Site Investigation 7.3.2 Analytical Results • Phase 11 mg/kg. Two samples contained concentrations of Investigation total xylenes detected at 460ug/kg and 520 ug/kg. .,, A total of 26 soil samples and one composite 7.3.2.2 Composite Sample from sample were submitted for analyses in Agricultural Chemical Mixing accordance with the above described analytical Areas program. The results of the analyses performed `'' on the soil samples are summarized in Table 1 The results of the analyses performed on the and the locations of the soil borings are shown on composite sample for agricultural chemicals Plate 3. The results of the analyses for indicate that three of the analytes are present ,., agricultural chemicals performed on the with concentrations detectable above method composite sample are summarized in Table 2 and reporting limits. Nitrate was detected in the the locations of the agricultural chemical mixing composite sample at a concentration of 278 areas are shown on Plate 2. Copies of the mg/kg. DDE, a breakdown product of DDT, was "~ analytical reports are attached as Appendix C detected at a concentration of 33 ug/kg. Diuron, a preemergent herbicide, was detected with a 7.3.2.1 Soil Samples from AST* Location concentration of 0.37 mg/kg. With these three bw and Former USTs Location exceptions, all of the remaining analytes consisting of the organochlorine pesticides, Two borings were drilled during the initial part of polychlorinated biphenols, organophosphorus the Phase II Investigation. Two soil samples were pesticides, chlorinated herbicides, and the submitted from boring SB-1, drilled adjacent to carbamate and urea pesticides included under the the existing ASTs location, and were analyzed in EPA methods listed above were not present at accordance with analytical program described detectable concentrations. �+ above. Neither sample contained detectable concentrations of TPHg,TPHd, or BTEX. Five samples were submitted from boring SB-2 drilled at the former location of the two gasoline USTs and the former AST. None of the five samples contained detectable concentrations of TPHg or benzene. Four of the five samples(SB-2-5.0, SB- 2-10.0, SB-2-19.5, and SB-2-34.5) contained detectable concentrations of TPHd ranging from 81 milligrams per kilogram (mg/kg) to 8,800 mg/kg. Toluene was detected in two of the five samples (SB-2-5.0 and SB-2-19.5) at concentrations of 6 and 12 micrograms per kilogram (ug/kg), respectively. Three of the five samples (SB-2-5.0, SB-2-10.0, SB-2-19.5) contained detectable concentrations of ethylbenzene ranging from 5.9 to 140 ug/kg. The same three samples contained detectable concentrations of total xylenes ranging from 32 to 200 ug/kg. `r Five additional borings were advanced during the second part of the Phase lI investigation. Nineteen samples were submitted for analyses �Iw from these five borings. None of these samples contained detectable concentrations of TPHg, benzene, toluene, or ethylbenzene. Ten of the samples contained detectable concentrations of �. TPHd ranging from 1.3 mg/kg to mg/kg to 13,000 v G:\WRGDH\GH36371Z.151 Harding Lawson Associates 15 V.r