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1333 Martinez Street,San Leandro,California;Chang Income Property Partnership,LP(property owner)do Westlake Development Partners,LLC(applicant) DRAFT MITIGATION MONITORING PROGRAM (MMP) MONITORING IMPACT MITIGATION REQUIRED RESPONSIBILITY TIMING Mitigation Measure#9(Continued) • Hazards and Hazardous • Excavation De-Watering: Although not anticipated, if City of San Leandro Prior to issuance of Grading Materials(Continued) excavation de-watering is required, the water will be sampled and Community Development Permit analyzed prior to pumping to evaluate discharge alternatives. Department and The developer's environmental consultant shall collect a sample Environmental Services of the water for laboratory analyses for COPCs; other analyses Division of the Public may be required, based on the intended disposal or re-usc of the Works Department water. • Additional Soil Management Protocols During Construction Activities: Soil with residual COPCs may be present on-site. Subsurface investigations planned for the Sites will determine the presence or absence of COPCs in soils. Once soils are tested, a Site specific soil management plan (SMP) will be prepared. At • the present time, there are no known chemical source areas or areas of soil contamination on either Site. The protocols to be followed in the event that unknown areas of contamination are identified during development are described in this section. • Procedures for Discovery of Unknown Areas of Contamination: Site development activities may result in the identification of previously unknown areas or types of contamination. Unknown conditions which may trigger contingency monitoring procedures during site development include,but are not limited to,the following: • Oily,shiny,or chemical saturated soils; • Soil with a significant chemical or hydrocarbon-like odor;or • Significantly discolored soils. Upon the discovery of one of the conditions identified above, the contractor will conduct the contingency monitoring. • Contingency monitoring,if conducted,will consist of the following • steps: If unknown areas of potential discolored soils are encountered, additional analyses should be conducted for the suspected constituents to assess the actual composition of the suspected contamination. A State environmental regulatory agency should be contacted for assistance in determining if additional sampling and potential mitigation is necessary. If the encountered materials are suspected to contain volatile organic • • chemicals,the following contingency monitoring procedures may 1333 Martinez Street,Westlake Office/Technology Campus—Draft WIMP Page 7