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SPX CORPORATION ORDER R5-2019-0018 SPX MARLEY COOLING TECHNOLOGIES GROUNDWATER CLEANUP NPDES NO. CA0081787 is not fully utilized unless supplemental waste sources are added. Flushing water may be added to supplement the groundwater contaminant concentrations. A process flow diagram for the groundwater extraction and equalization is shown in Attachment C (Figure C-4). Additionally, symbols, an instrument legend, and definitions for all of the systems flow diagrams are shown in Attachment C (Figure C-5). B. Discharge Points and Receiving Waters 1. The Facility is located in Section 32 T2N, R7E, MDB&M. The Facility is located at 200 North Wagner Avenue Stockton, CA 95215 in San Joaquin County, as shown in Attachment B of this Order. 2. Treated ground wastewater is discharged at Discharge Point No. 001 to the Stockton Diverting Canal, a water of the United States and a tributary to the Calaveras River at a point latitude 37° 58' 19" N and longitude 1210 13' 34" W. 3. The Upper Mormon Slough drainage course originates from the Calaveras River near Bellota then flows west-southwest from Bellota, south of the Calaveras River. The Stockton Diverting Canal is an engineered drainage which re-connects Upper Mormon Slough to the Calaveras River on the East side of Stockton. From approximately October to April each year, the East Stockton Water District dams the Calaveras River at its fork with Upper Mormon Slough, diverting flows through Upper Mormon Slough and the Stockton Diverting Canal. 4. From approximately April to October each year, flows are split between the Calaveras River and Upper Mormon Slough. A series of check dams are installed along the Calaveras River, Upper Mormon Slough, and the Stockton Diverting Canal to provide irrigation water for adjacent farmers. During this time, there are periods of limited or no flow in the Stockton Diverting Canal. C. Summary of Existing Requirements and Self-Monitoring Report (SMR) Data Effluent limitations contained in Order R5-2014-0013 for discharges from Discharge Point001 (Monitoring Location EFF-001) and representative monitoring data from the term of Order R5-2014-0013 are as follows: Table F-2. Historic Effluent Limitations and Monitoring Data Effluent Limitation Monitoring Data January 2014—June 2018 Parameter Units Highest Highest Highest Average Average Maximum Average Average Daily Monthly Weekly Daily Monthly Weekly Discharge Discharge Discharge Flow mgd 0.72 -- 0.94 -- -- 0.27 pH Std. 6.5-8.51 -- -- 7.5-7.9 units Chromium (total), Total pg/L 50 -- -- 36.9 -- 36.9 Recoverable Chromium pg/L 1.4 -- 15 23.7 -- 23.7 (VI) Copper, Total pg/L 6.6 -- 17 69.3 -- 69.3 Recoverable ATTACHMENT F— FACT SHEET F-6