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CNTY OWRACY Utilities Division 3900 Holly Drive YZTelephone: (209)836-1650 F f tiw° Tracy, CA 95376 � ,� Fax: (209)836-0932 �CpRppRP JUL 2 01995 ENVIRONMENTAL HEALTH July 19, 1995 PERMIT/SERVICES State of California Regional Water Quality Control Board Central Valley Region 3443 Routier Road, Suite A Sacramento, Ca. 95827-3098 Attention: Mike Mosbacher Subject: 1994-1995 Sludge Post-Application Report and Annual Sludge Land Application Report The Waste Discharge Requirements issued to the City of Tracy require that a post application report be submitted to your office at the end of each sludge application cycle. It also requires an annual report to be submitted by August 30th of each year. The enclosed report should satisfy both of these requirements. I have changed this year's report to include monitoring required by the EPA 503 requirements and also to include additional information that you have requested. A review of the enclosed data shows that: 1. Table 1 shows results of analyses on our dried sludge for total metals and nutrients. All data for the metals met the EPA 503 criteria. Nutrient results were used to plan and document agronomic loadings to the fields. 2. Table 2 shows analyses on dried sludge for the EPA 503 pathogens. All results met the criteria for a Class A sludge. 3. Table 3 shows analyses and inventory results for the sludge applied in Fail of 1994. Average values from the data were used for the concentrations in pure sludge used. These values are used to determine agronomic rates, annual and cumulative loadings of metals, etc. 4. Table 4 shows actual applications of sludge to the Fields 7A and 7B. The application rates were well within the typical nitrogen requirement of 450 pounds per acre for alfalfa. 5. Table 5 shows total plant nutrient additions to each field. No supplemental fertilizer was added to these fields. 1