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SPX CORPORATION ORDER R5-2019-0018 SPX MARLEY COOLING TECHNOLOGIES GROUNDWATER CLEANUP NPDES NO. CA0081787 1. Effluent sampling shall be performed concurrently with influent sampling. 2. Pollutants shall be analyzed using the analytical methods described in 40 CFR Part 136 or by methods requested by the Discharger that have been approved by the Central Valley Water Board or the State Water Board. s. A hand-held field meter may be used, provided the meter utilizes a U.S. EPA-approved algorithm/method and is calibrated and maintained in accordance with the manufacturer's instructions. A calibration and maintenance log for each meter used for monitoring required by this Monitoring and Reporting Program shall be maintained at the Facility. 4. For priority pollutant constituents the reporting level shall be consistent with Sections 2.4.2 and 2.4.3 of the Policy for Implementation of Toxics Standards for Inland Surface Waters, Enclosed Bays, and Estuaries of California (See Attachment E, Table E-6). 5. Hardness samples shall be collected concurrently with metals samples. V. WHOLE EFFLUENT TOXICITY TESTING REQUIREMENTS A. Acute Toxicity Testing. The Discharger shall conduct acute toxicity testing to determine whether the effluent is contributing acute toxicity to the receiving water. The Discharger shall meet the following acute toxicity testing requirements: 1. Monitoring Frequency—The Discharger shall perform quarterly acute toxicity testing, concurrent with effluent ammonia sampling. 2. Sample Types—The Discharger may use flow-through or static renewal testing. For static renewal testing, the samples shall be grab samples and shall be representative of the volume and quality of the discharge. The effluent samples shall be taken at Monitoring Location EFF-001. 3. Test Species—Test species shall be fathead minnows (Pimephales promelas). 4. Methods—The acute toxicity testing samples shall be analyzed using EPA-821-R-02- 012, Fifth Edition. Temperature, total residual chlorine, and pH shall be recorded at the time of sample collection. No pH adjustment may be made unless approved by the Executive Officer. 5. Test Failure— If an acute toxicity test does not meet all test acceptability criteria, as specified in the test method, the Discharger must re-sample and re-test as soon as possible, not to exceed 7 days following notification of test failure. B. Chronic Toxicity Testing. The Discharger shall meet the following chronic toxicity testing requirements: 1. Monitoring Frequency—The Discharger shall perform routine quarterly chronic toxicity testing. If after two years of routine quarterly toxicity testing, the Discharger can demonstrate consistent compliance with the monitoring trigger, the monitoring frequency may be reduced to semi-annual, per approval by the Executive Officer. If the result of the routine chronic toxicity testing event exhibits toxicity, demonstrated by a result greater than 1.3 TUc (as 100/EC25) AND a percent effect greater than 25 percent at 100 percent effluent, the Discharger has the option of conducting two additional compliance monitoring events and perform chronic toxicity testing using the species that exhibited toxicity in order to calculate a median. The optional compliance monitoring events shall occur at least one week apart, and the final monitoring event shall be initiated no later than 6 weeks from the routine monitoring event that exhibited toxicity. 2. Sample Types— Effluent samples shall be 24-hour composite samples and shall be representative of the volume and quality of the discharge. The effluent samples shall be taken at Monitoring Location EFF-001. The receiving water control shall be a grab ATTACHMENT E— MONITORING AND REPORTING PROGRAM E-5