SITE INFORMATION AND CORRESPONDENCE

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FilioslDoblerAnnexation iand Development Project Environmental Impact Report TRACY result in.thc release of ACMs or LBPs must be conducted according to federal and-state laws and regulations. The National Emission Standards for Hazardous Air Pollutants (NESHAP), implemented through the: SJVAPCD Rule 4002, mandates that building owners conduct an asbestos survey to determine the presence of ACMs prior to the commenccrrient of any remedial work, including demolition. If ACM material is found, abatement of asbestos would.be required prior to .any demolition activities. Also, if paint is separated from building materials (chemically or physically) during demolition of the structures.- the-paint tructures.the-paint waste would be required to be.evaluated independently from the building material by a qualified Environmental Professional. If.lead-based paint is found and is.separating'from the building material, abatement would be required to be completed by a qualified Lead Specialist-prior,to any demolition activities. Compliance with Mitigation Measures 4.10-1a and 4.10-1b'and compliance with STVAPCD Rule 4002 would reduce potential impacts in this regard to less than significant levels. Agricultural Activities r f no hazardous The Project site is currently utilized for agricultural purposes. .Based on the EHMCA, materials contamination has resulted at the.Project site due to current agricultural operations. However, j ! the Project site has been historically utilized for agricultural purposes(since prior to 1957 until the present day). Therefore; a combination of several commonly-used pesticides (i.e., DDD, DDT and DDE);which are now banned,may.have been used throughout the Project site(particularly from the 1940s through the 1960s). The historical use of agricultural pesticides may have resulted in pesticide residues of certain persistence in soil at concentrations that are considered to be'hazardous based on established federal regulatory levels. The primary concern with historical pesticide residues is human health risk from inadvertent ingestion of contaminated soil, particularly by children. The presence of moderately elevated pesticide residuals in soil presents potential health and marketplace concerns. Development at the Project site could expose construction workers(during site disturbance activities)and 3 the public (during operations) to hazardous materials.. Future development at the Project site would be required to conduct soil sampling within the portions of the Project site that have historically been utilized for agricultural purposes and may contain pesticide residues in the soil (as detennined by a qualified Phase II/Site Characterization specialist). The sarnpling, conducted in consultation with the EHD, would determine if pesticide concentrations exceed established regulatory requirements and would identify further site characterization and remedial activities, if necessary. Should further site characterization/remedial activities be required, these activities would be required to be conducted per the applicable regulatory agency requirements, as directed by the EHD. With implementation of Mitigation Measure 4.10-1c, impacts pertaining'to historical agricultural uses would be reduced 'to less than j significant levels. Known Contamination from Reported Spills r There is reported residual crude oil and Bunker C oil in the soil along the southern portion of the Project site as a result of two offsite oil pipelines (the OVP and TAOC pipelines). Site investigations have been . l undertaken by Chevron for properties along the historical pipelines which included portions of the Project site). Crude oil affected soil, later attributed to the OVP/TAOC leaks, were identified. Based on past investigations at the Project site, very-limited petroleum hydrocarbon-affected soil was encountered at four to 15 feet bgs. Detected constituents (pyrene and chrysene) as well. as benzene, toluene, ` ethylbenzene, xylenes, and PAHs were below their respective residential PRGs, indicating that the r presence of these constituents in soil at the site do not pose.an unacceptable risk to future onsite residents. There were no detections of dissolved-petroleum constituents in groundwater. As part of these Hazards and Hazardous Materials 4.10.12 Draft'•June 2011