75A - PH BRISTOL ST MEMORY LN PROJECT

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ENVIRONMENTAL IMPACT REPORT ADDENDUM Bristol Street and Memory Lane Intersection Improvements - Project No. 17-6883 No other routine transport, use, or disposal of hazardous materials is anticipated as a result of the proposed Project. Thus, compliance with existing regulations would ensure that impacts are not greater than that previously analyzed in the 1990 FEIS/EIR. Certified 1990 FEIS/EIR Mitigation Measures: No 1990 FEIS/EIR mitigation measures are applicable. Mitigation Measures: No additional mitigation measures are required. b) Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment? As listed in Tablel. Proposed Propertv Acquisition, a total of three Assessor's Parcel Numbers (APNs) (002-261- 06, -29, and -30) would be partially acquired as a result of the proposed intersection improvements; refer to Exhibit 5 Proposed Riehl -of -Way Acquisition. All proposed areas of acquisition include vacant portions of commercial and multi -family residential properties. These vacant areas consist of bare soils, paving/asphalt, or ornamental landscaping. Based on information maintained by the State Water Resources Control Board (SWRCB), APN 002- 261-06 (currently a vacant disturbed property located at 2702 N. Bristol Street) was historically Chevron Service Station #9-8787.[2 On January 28, 1999, three 10,000 -gallon gasoline underground storage tanks (USTs) and one 1,000 -gallon used oil UST were removed from the property. According to the SWRCB, a release from the USTs, clarifier, sump, and degreaser were reported during tank removal. Site characterization of potential contaminates was completed and, based on groundwater monitoring, determined that only the soil was affected above regulatory thresholds. Contaminated soils were excavated. Based on a case closure letter issued by the Santa Ana Regional Water Quality Control Board (RWQCB), dated October 22, 2001, completion of the site investigation, remedial action, and groundwater monitoring was completed. 13 No further action related to the reported release is required based on the current land use. According to the 1990 FEIS/EIR, ROW impacts to businesses that may generate hazardous waste or sites that contain underground storage tanks will occur with implementation of the preferred alternative. The 1990 FEIS/EIR acknowledged that it is likely that implementation of the preferred alternative would require the removal of USTs or aboveground storage tanks, or modifications to sites that have historically been handling, processing, or storing hazardous materials. Such activities have the potential to release hazardous wastes into the air or into the ground, but standard construction practices, which would involve careful coordination of design plans or prior notification of construction activity, are expected to minimize these risks and to minimize any disruptions. Thus, compliance with existing regulations and the 1990 FEIS/EIR mitigation measures would ensure that impacts are not greater than that previously analyzed in the 1990 FEIS/EIR. Certified 1990 FEIS/EIR Mitigation Measures: X-1 The City of Santa Ana's Public Works Director will coordinate closely with all agencies and companies which maintain underground or at -grade utility or energy facilities within the areas to be disturbed by project construction activities. Preliminary and final design plans will be made available to such agencies for review and comment. At least 48 hours prior to commencement of any excavation activities, the City will contact the Underground Service Alert to notify the affected utility/energy purveyors who can place their personnel at the excavation site to assist in the location of underground facilities during the exploratory digging immediately preceding excavation. In this manner, the risk of line rupture to natural gas, petroleum, and sewer facilities, which might release hazardous substances and odors in to the air, can be minimized. X-2 Should any unidentified substances, odors, leaking underground tanks, or other mysterious and potentially hazardous materials be encountered during project construction, work in that area will be halted and the Santa Ana Fire Department's Hazardous Materials. Team will be contacted to evaluate the materials and to define appropriate remedial measures. 12 State Water Resources Control Board, Geo Tracker, http://geotracker.waterboards.ca.gov/, accessed July 24, 2017. 11 Ibid. Draft November 2017 3-14 Environmental Consequences 75A-43