The purpose of the Phase II ESA was to further investigate two recognized environmental conditions RECs at the site as documented in a Phase I ESA report conducted at the site. According to the Phase I ESA Report, the following RECs existed: � Sanborn Maps and city directory searches revealed that a service station operated on the subject property during the 1930s, 1940s, and possibly the early 1950s. Historically, such facilities typically dispensed fuel from an underground storage tank UST. However, the contractor was unable to obtain documentation on possible USTs located on and/or removed from the subject property. Furthermore, these types of facilities historically conducted maintenance on vehicles which could potentially release petroleum hydrocarbons, polynuclear aromatic hydrocarbons PAHs, semi-volatile organic compounds SVOCs, volatile organic compounds VOCs, and metals. Additional assessment should be conducted in the reported area of the former service station to verify that USTs are not present at the site. In the event that USTs are discovered, soil and/or groundwater samples should be collected and analyzed for PAHs, SVOCs, VOCs, and metals to identify potential impacts to soil and/or groundwater. � Review of standard records indicates that there is an active leaking UST LUST case, ID #4482.03, located at 1700 S. 6th Avenue, approximately 65 feet south of the subject parcel. Allwyn Environmental review of the files for this LUST case identified two monitoring wells located on the subject property. The most current groundwater monitoring report for this LUST case was dated January 5, 2009. The report indicated that concentrations of petroleum hydrocarbons in the groundwater were detected in one of the wells in the December 2008 groundwater sampling event, in concentrations above the Arizona Water Quality Standards AWQS. Historical sampling results indicate that groundwater in both wells consistently contained concentrations of petroleum hydrocarbons above AQWS. For the Phase II ESA, a back-hoe was used to excavate areas in the vicinity of the former gas station to ensure that USTs were not present at the site. In addition, three borings were installed to depths ranging from 55 feet below ground surface bgs to 65 feet bgs and samples were collected at 10-foot intervals beginning at 5 feet bgs and analyzed for VOCs and PAHs. Finally, four near surface samples were collected across the parcel and analyzed for VOCs, SVOCs, and 8 RCRA metals. VOCs and PAHs were not present above the analytical laboratory method detection limits in samples collected from the borings SS-1, SS-2, and SS-3. The following constituents were present in soil at concentrations above the applicable analytical laboratory method detection limits MDLs in soil samples: � HS-1: Anthracene, Benzoaanthracene, Benzobfluorantene, Benzokfluorantehne, Benzoapyrene, Chrysene, Fluoranthene, Phenanthrene, Pyrene, and all 8 RCRA metals except selenium and silver � HS-2: All 8 RCRA metals except cadmium, mercury, selenium, and silver � HS-3: All 8 RCRA metals except selenium and silver � HS-4 All 8 RCRA metals except cadmium, selenium, and silver Of the constituents listed above, Benzoapyrene was present in HS-1 0.21 milligrams per kilogram mg/kg at a concentrations above the applicable State of Arizona residential Soil Remediation Levels 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. All other constituents were present in concentrations below the applicable residential SRL. The City conducted Supplemental Phase II field investigation on September 10, 2010 by collecting three near surface samples HS-5, HS-6, and HS-7 and submitting the samples for SVOCs analysis. The following constituents were present in soil at concentrations above the applicable analytical laboratory method detection limits MDLs in soil samples: � HS-5: Bis2-ehtylhexylphthala