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SPX CORPORATION ORDER R5-2019-0018 SPX MARLEY COOLING TECHNOLOGIES GROUNDWATER CLEANUP NPDES NO. CA0081787 Percent Effect The percent effect at the instream waste concentration (IWC) shall be calculated using untransformed data and the following equation: Percent Effect of the Sample= Mean Control Response—Mean Sample Response 100 Mean Control Response Persistent Pollutants Persistent pollutants are substances for which degradation or decomposition in the environment is nonexistent or very slow. Pollutant Minimization Program (PMP) PMP means waste minimization and pollution prevention actions that include, but are not limited to, product substitution, waste stream recycling, alternative waste management methods, and education of the public and businesses. The goal of the PMP shall be to reduce all potential sources of a priority pollutant(s) through pollutant minimization (control) strategies, including pollution prevention measures as appropriate, to maintain the effluent concentration at or below the water quality-based effluent limitation. Pollution prevention measures may be particularly appropriate for persistent bioaccumulative priority pollutants where there is evidence that beneficial uses are being impacted. The Central Valley Water Board may consider cost effectiveness when establishing the requirements of a PMP. The completion and implementation of a Pollution Prevention Plan, if required pursuant to Water Code section 13263.3(d), shall be considered to fulfill the PMP requirements. Pollution Prevention Pollution Prevention means any action that causes a net reduction in the use or generation of a hazardous substance or other pollutant that is discharged into water and includes, but is not limited to, input change, operational improvement, production process change, and product reformulation (as defined in Water Code section 13263.3). Pollution prevention does not include actions that merely shift a pollutant in wastewater from one environmental medium to another environmental medium, unless clear environmental benefits of such an approach are identified to the satisfaction of the State Water Resources Control Board (State Water Board) or Central Valley Water Board. Satellite Collection System The portion, if any, of a sanitary sewer system owned or operated by a different public agency than the agency that owns and operates the wastewater treatment facility that a sanitary sewer system is tributary to. Source of Drinking Water Any water designated as municipal or domestic supply (MUN) in a Central Valley Water Board Basin Plan. Standard Deviation (6) Standard Deviation is a measure of variability that is calculated as follows: 6 = Q(X -µ)2]/(n — 1))0.5 where: x is the observed value; µ is the arithmetic mean of the observed values; and n is the number of samples. ATTACHMENT A- DEFINITIONS A-4