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Polynuclear Aromatic Hydrocarbons (PAHs) <br />kq K L E I N F E L D E R <br />Four PAHs from the semi -volatile organic analyses (EPA 8270) were detected in a single <br />composite sample. A summary of the concentrations are shown on Table 2 found in the <br />appendix of this report. A summary of the four PAHs concentrations are illustrated below with <br />including Industrial PRGs <br />PAHs Analytes <br />Concentration (mg/kg) <br />Industrial PRG (mg/kg) <br />Benzo (a) anthracene <br />0.15 <br />2.9 <br />Benzo (a) pyrene <br />0.15 <br />0.29* <br />Chrysene <br />0.11 <br />290 <br />Fluoranthene <br />0.17 <br />30,000 <br />* "Cal -Modified PRG" (PEA 1994) <br />As noted above the concentrations for each of these compounds area below PRGs for industrial <br />use. According to the "Handbook of Environmental Data on Organic Chemicals, Second <br />Edition", these chemical have similar sources including crude oil, coal tar, emissions from <br />gasoline engines, asphalt, cigarette smoke, sewage etc. In general these are relatively heavy and <br />found in a variety of compounds. These type of PAHs generally have low solubility. <br />Corrosivity <br />The composite stockpile samples was also analyzed for corrosivity. Corrosivity is measured <br />using pH. The pH values ranged from 7.89 to 7.96 units which is slightly alkaline. However in <br />Kleinfelder's experience these values are not uncommon of many soils in the valley. <br />5.0 RECOMMENDATIONS <br />Based upon the analytical results presented in this report, it appears the stockpiled material is <br />suitable for industrial use or to be disposed of in an appropriate landfill. If the material is to be <br />moved offsite, the findings within this report should be made available to the recipient of the <br />material and approval obtained from PHS/EHD. Offsite residential use of this material is not <br />recommended. Kleinfelder recommends forwarding this report to PHS/EHD for their review and <br />comment. <br />This report, and the conclusions and recommendations presented in this report are subject to the <br />"Limitations" presented below. Any other party other than regulatory agencies having <br />enforcement jurisdiction for this site) who would like to use this report shall notify Kleinfelder, <br />Inc. of such intended use by executing the "Application for Authorization to Use" contained in <br />Attachment C. <br />20-1108-33-001/2011 R 1 188 Page 5 of 7 <br />0 2001, Kleinfelder, Inc. October 17, 2001 <br />