55C - ALTON AVE OVERCROSSING @ SR 55

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Draft Findings of Fact and Mitigation Monitoring Reporting Program (applies to CEQA only) . Site No. 44 - One Source Distributors, 1021 Duryea Avenue, Irvine - Partial Take On November 17, 2004, Leighton Consulting conducted a site reconnaissance of the site (Leighton Consulting, 2005). The usage/storage or hazardous materials and the presence of underground storage tanks were not observed on the property. There was no indication hazardous material impact to near-surface soils on the portion of the property to be acquired. Groundwater beneath the site may have been impacted by migration of contaminants present in the groundwater in the area. Any project excavation required on this site is expected to be shallow and not expected to encounter groundwater. · Site No. 74 - Arte International Furnishings, 17092 Pullman Street, Irvine - Partial Take On November 17, 2004, Leighton Consulting conducted a site reconnaissance of Arte International Furnishings located at 17092 Pullman Street (Leighton Consulting, 2005). The present or past usage/storage of hazardous materials and underground storage tanks were not observed on the property. There was no indication hazardous material impact to near-surface soils on the portion of the property to be acquired. Several groundwater monitoring wells were observed during the site reconnaissance in the right-of-way along Pullman Street in front of the property site. Groundwater beneath the site may have been impacted by migration of contaminants present in the groundwater in the area. Any project excavation required on this site is expected to be shallow and not expected to encounter groundwater. · Site No. 75 - 3M, 17132 Pullman Street, Irvine - Partial Take On December 1, 2004, Leighton Consulting received a copy of the completed Phase I ESA for 3M located at 17132 Pullman Street (Weston Solutions, Inc., 2004). According to the Phase I ESA, underground storage tanks, vent pipes, dispenser pads, and groundwater wells were not observed on site. The facility operates under 13 air permits for knitting operations/coaters and a storm water discharge permit. Hazardous substances (coolants and oils) are stored in 55-gallon drums in an outdoor covered and locked area. No violations were found for this site. One release of approximately 30 gallons of hydraulic fluid into the subsurface soils occurred in 1986, however, the spill and impacted soil was removed. A Phase II ESA is being prepared for this site to assess soil and groundwater conditions based on the historic use of chlorinated solvents at the facility between 1975 and 1994. Any project excavation required on this site is expected to be shallow and not expected to encounter groundwater. · Site No. 77 - RicohlLanier Professional Services, 1062 McGaw Avenue, Irvine - Partial Take On September 30, 2004, Leighton Consulting conducted a site reconnaissance of the vacant Ricoh building located at 1062 McGaw Avenue. The site was previously used to assemble printers and toner cartridges. An aboveground propane storage tank that is no longer in use is located in the rear of the building. A groundwater investigation conducted by Applied Geosciences, Inc. in 1993 indicated groundwater contamination was present at the site. Although the RWQCB has taken the position that the site may have been impacted by discharges of chlorinated volatile organic compound (CVOC) contaminated groundwater from the 17482 Pullman Street property, which is a non-acquisition property, any project excavation required on this site is expected to be shallow and not expected to encounter groundwater. · Site No. 19 - ITT Cannon, 666 Dyer Road, Santa Ana - Non-Acquisition Alton Avenue Overcrossing at SR-55 K-14 April July 2005 55C-32