The purpose of the Phase II ESA was to further investigate two recognized environmental conditions RECs at the site as documented in the Phase I ESA report. Subsequently, a Phase II field investigation on May 2, 2011. The following information was obtained from the analytical report: � Sample SS-1, collected in the vicinity of the waste street sweepings revealed the following constituents at levels above the applicable analytical laboratory method detection limits MDLs but below the applicable State of Arizona non-residential or residential SRLs: - Anthracene, Acenaphtene, Benzoa anthracene, Benzobfluoranthene, Benzog,h,iperylene, Benzokfluoranthene, Chrysene, Dibenza,hanthracene, Fluoranthene, Fluorene, Indeno1,2,3-cdpyrene, Phenanthrene, and Pyrene. - Arsenic, Barium, Chromium, Lead, and Silver. Benzoapyrene was present in SS-1 0.21 milligrams per kilogram mg/kg at a concentrations above the applicable State of Arizona residential SRL for the 1x10-6 cancer risk of 0.069 mg/kg, but below the applicable State of Arizona non-residential SRL for the 1x10-5 cancer risk of 0.69 mg/kg. � Sample SS-2, collected in the vicinity of the waste street sweepings revealed the following constituents at levels above the applicable analytical laboratory MDLs but below the applicable State of Arizona non-residential or residential SRLs: - Arsenic, Barium, Chromium, and Lead. � Sample SS-3, collected in the vicinity of the construction and demolition debris revealed the following constituents at levels above the applicable analytical laboratory MDLs but below the applicable State of Arizona non-residential or residential SRLs: - Barium, Chromium, and Lead. � Sample SS-4, collected in the vicinity of the construction and demolition debris revealed the following constituents at levels above the applicable analytical laboratory MDLs but below the applicable State of Arizona non-residential or residential SRLs: - Barium, Chromium, and Lead. A Supplemental Phase II ESA was to further investigate the horizontal concentration of semi-volatile organic compounds SVOCS, particularly Benzoapyrene in the vicinity of SS-1. The soil samples collected did not reveal the presence of SVOCs above the applicable analytical laboratory method detection limits MDLs. Based on the results of the Supplemental Phase II ESA, the results of the Phase II ESA, and the results and conclusions in the Phase I ESA, the horizontal extent of SVOCs has been delineated in the vicinity of SS-1. Therefore, no additional soil sampling is required and no recognized environmental conditions RECs exist at the site.
Former Use: In 1958, the subject property consisted of native desert. No significant changes have occurred at the subject property since that time.