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COPCs; other analyses may be required, based on the intended disposal or re-use of the 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 be followed: Conduct contingency monitoring by taking organic vapor readings using an organic vapor meter (OVM) or an organic vapor analyzer (OVA) to screen for the presence of fuel, oil, or solvents. If the OVM/OVA indicates that an unknown area of fuel, oil, or solvents has been detected, then a State environmental regulatory agency should be notified to determine if additional sampling is appropriate prior to continuing construction in that area. OVM or equivalent screening methods will be conducted by experienced personnel only. If an unknown area of soil contamination has been identified, and the State environmental regulatory agency requests additional characterization, the following steps will be taken: o Soil samples will be collected from the identified area and analyzed for the likely COPC, depending on the suspected type of contamination. The sampling strategy will be discussed with a State environmental regulatory agency prior to the initiation of the sampling activities. Analytical results collected from the suspected source will be compared Agreement to Conditions April 21,2014 PLN2013-00045 Page 10 of'�-