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Port of Stockton _9_ San Joaquin County Staff met with representatives of H.J. Baker, Metropolitan Stevedore and the Port on 30 March 2005 at the Port's administrative office and then inspected the individual facilities. Staff brought a pH/electrical conductivity meter to obtain field analysis of surface water runoff from these facilities. The meter had been calibrated at the Regional Board office prior to the inspection. During the visit, staff collected and analyzed eleven field samples. The areas of interest consisted of, storm water ponding around the bulk storage facilities, pumped groundwater from a tunnel that conveys sulfur from the storage areas to the dock area, and storm water runoff ditches, sumps and ponds. OBSERVATIONS AND COMMENTS: The field analysis had low pH readings from 2.1 to 6.8, with the majority of the readings being between 2.0 and 4.0. The elevated electrical conductivity analysis readings range from 645 pmhos/cm to 18,000 µmhos/cm. The following table describes the approximate locations of the field readings: No. Location EC pli_ (u.mhos/cm) 1 Area of coal piles (Photo No. 15). 1880 6.8 2 Storage area of pumped groundwater (containing sulfur) from the conveyor tunnel between the sulfur and dock (Photos No. 16 and 17). 3200 2.6 3 Storm water sump that pumps collected storm water and incidental sulfur into the main storm water system where it eventually reaches the main storm water retention pond (Photo No. 18). 2370 5.6 4 Storm water ponding between the H.J. Baker facility and Bay Sulfur (Photo No. 10). 18,000 2.1 5 Storm water pond located to the northwest of Bay Sulfur and to the southwest of the former Metropolitan Stevedore's koch carbon coal piles (Photo No. 13). 645 3.2 6 Storm water ponding east and adjacent to Bay Sulfur (Photo No. 9). 3900 3.5 7 Metropolitan Stevedore's storm water pond (Photo No. 12). 3000 2.6 8 Storm water ditch located to the south of Bay Sulfur. 1000 3.2 9 Discharge from storm culvert to the stormwater ditch adjacent to Washington Street. The culvert discharge location is to the immediate west of the entrance to Bay Sulfur, H.J. Baker facilities off of Washington. Water had a blue tint indicative of copper (Photo No. 14). 890 5.1 10 Upstream of discharge as described above in No. 9. 1008 5.8 11 Main storm water retention pond. 745 6.8 Photos that were taken during the inspection are attached to this report. The low pH and high electrical conductivity readings are indicative of sulfur impacted water. There was wind blown sulfur drift throughout the area. This sulfur was in direct contact with surface water, both in ponded water and surface drainage ditches. Staff observed sulfur being wind blown from the Bay Sulfur bulk storage facility into ponded surface water. The current p actices t these facilities are impacting surface water and is a direct threat to groundwater. Molly White, Water Resources Control Engineer Approved: