SITE INFORMATION AND CORRESPONDENCE_CASE 2

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t: ` CENTRAL V LAL EY REGIONAL WATER QUALITY CONTROL BOARD INSPECTION REPORT 23 May 1996 DISCHARGER: City of Tracy LOCATION &COUNTY: Tracy Wastewater Treatment Plant, San Joaquin County CONTACT(S): Frank Motzkus,Plant Supervisor INSPECTION DATE: 22 May 1996 INSPECTED BY: Michael H. Mosbacher ACCOMPANIED BY: Frank Motzkus Plant Supervisor and Steve Bayley Deputy PW Director The City of Tracy's Waste Water Treatment Plant inspection was a walk through inspection in which I was accompanied by Frank Motzkus and Steve Bayley. Our inspection started at the headworks and ended at the outfall of the chlorine contact chambers where we collected samples for analysis. The following observations were made at each of the major treatment operations: • Inside the headworks building it was somewhat malodorous, however, outside the building the odors were significantly less. Bar screenings are dewatered and consolidated in a rag press, which appears to be very affective. The bar screenings are then hauled to the Tracy Materials Recycling Facility and Transfer Station where they are then transported to a landfill in the Stockton area. • The older of the two domestic primary clarifiers is still out of service. However,it isn't needed at this time. • All domestic and industrial flows are going through the new biotowers. Both of the trickling filters were not being used because of the effectiveness of the biotowers in organic removal. • Both sludge digestors were in service. The most westerly digestor had just had repairs completed the week before the inspection. The hope is that the digestor will be fully acclimated by the time canning season begins. The following information was discussed of current operational strategies and future expansion projects: • Plant is operating at partial nitrification. • Cogeneration plant still operating with primarily natural gas . • A new laboratory is being designed and is scheduled to begin construction in March 1997, with completion and operational by the fall of 1997. • Half of the sludge drying beds will have asphalt applied to the bottoms this summer. • Leprino Cheese is proposing to add increased levels of treatment to their pretreatment operations in hopes improving their of reducing their wastewater disposal fees. • The City of Tracy is making great strides to computerize the plant operations and monitoring. Several of the plant's operational functions can be monitored from the plant's control room. INSPECTION SUMMARY: No apparent violations were seen during this inspection. Le-�Ui Michael It Mosbacher, Project Engineer REVIEWED BY: I I I