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Limited Phase II Environmental Site Assessment 8 -Acre Property, Fairhaven Memorial, Santa Ana, California EXECUTIVE SUMMARY This report presents the results of a limited Phase II environmental site assessment (ESA) that was performed at the Fairhaven Memorial Park & Morturary site located at Cambridge Avenue and Fairhaven Avenue in Santa Ana, California. The purpose of the site assessment was to determine if soil at the subject property has been affected by historical agricultural use associated with the site. On October 17, 2005, eight hand auger borings (HA1 through HA8) were advanced on the subject property. The hand auger borings were advanced to 3 feet below grade. Five soil samples were collected from each boring at depths of 0.5, 1, 1.5, 2 and 3 feet below grade. 1.; Varying concentrations of pesticides were detected in the soil samples collected and analyzed for pesticides. None of the detected pesticides exceeded Preliminary Remediation Goals (PRGs) or Total Threshold Limit Concentration (TTLC) thresholds established by the United States Environmental Protection Agency (USEPA) or the State of California Department of Toxic Substances Control (DTSC). Varying concentrations of metals were detected in the soil samples collected and analyzed for r' metals. The PRGs for residential and industrial settings for arsenic are 0.062 and 0.25 mg/kg, - respectively. Background concentrations of arsenic found in western United States soils (non - contaminated sites) range from 0.10 to 97 mg/kg (Shacklette and Boerngen, Element Concentrations in Soils and Other Surficial Materials of the Conterminous United States, USGS, 1984). The USEPA states that generally they do not require cleanup below natural background levels. In light of this fact and in our experience, regulatory agencies typically consider the use of local or regional background concentrations as the threshold concentration for requiring further investigation or remediation. All of the analyzed soil samples detected arsenic concentrations above the PRGs for residential and industrial settings and all of the detected concentrations are within the range of naturally occurring background concentrations for arsenic in western United States soils. The levels of the other metals identified in the soil samples collected from the subject property were within the published background ranges for metals in California soils. In addition, the _ levels of metals detected were compared to total threshold limit concentration levels established by the DTSC. The TTLC is used to determine whether excavated soil would be classified as a hazardous or non -hazardous waste for disposal purposes. STLC and TTLC levels for metals are listed in Table 2. Lead was detected in the 0.5 -foot sample from boring HA -6 at a level that warranted soluble (STLC) analysis. The additional STLC analysis revealed non -detect levels of soluble lead. Metal concentrations detected for all of the other samples analyzed for metals did not exceed their respective TTLC levels and were not high enough to warrant soluble (STLC) analysis. Based on the results of this limited Phase II assessment, no further assessment is recommended. Rincon Consultants 3'lAr66