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tITY OF TRAC% <br />SLUDGE PRE -APPLICATION REPORT TO THE <br />REGIONAL WATER QUALITY CONTROL BOARD <br />CENTRAL VALLEY REGION ON 1993-94 OPERATIONS AT THE <br />CITY OF TRACY SLUDGE LAND APPLICATION SITE <br />WASTE DISCHARGE REQUIREMENTS AND <br />MONITORING AND REPORTING PROGRAM NO. 91-160 <br />This report is to satisfy pre -application reporting Waste Discharge Requirements <br />(WDR's) for the City of Tracy's (City's) sludge land application site at K&L Farms, San <br />Joaquin County. It contains information on soil and sludge monitoring, as well as plans <br />for application of sludge during the fall of 1993 and spring of 1994. Items in the report <br />will be numbered to correspond to numbered items in the WDR's. <br />Field Characterization (5) <br />Sludge is to be applied to fields 1, 7 and 19, as numbered on Figure 2 of the Sludge <br />Management Plan (SMP). Crops grown on these fields will be sugar beets, beans and <br />almonds, respectively. We plan to apply sludge to field # 7 in the spring of 1994. <br />Sampling and Analysis Plan (1) <br />Sludge samples were composites of subsamples from representative points in sludge <br />drying beds from which sludge will be taken for land application in 1993 and 1994. <br />Samples were taken on July 20, 1993. Sludge analysis methods are listed in Table 1. <br />Soil samples were taken on April 23, 1993 and August 19, 1993. Subsamples from <br />representative points in each field were composited into one sample for each of 2 soil <br />layers (0 to 18 and 18 to 33 inches) for each field. Samples were composited from <br />samples collected as per Figure Al. <br />Background and Soils Monitoring Results and Interpretation (3) <br />Results of soils background monitoring are shown in Table 2. None of the results exceed <br />criteria, also listed in Table 2. <br />Verification of Nonhazardous Classification of Sludge (6) <br />The source of sludge, the City's Wastewater Treatment Plant, and the users of the <br />collection system, have not changed significantly since 1989. Certification by the <br />California Department of Health Services that the sludge is nonhazardous was included <br />in Appendix D of the SMP, and may be reviewed by referring to that document. <br />Sludge Characteristics (4) <br />Sludge quality is shown in results of monitoring analyses listed in Table 3. Criteria for <br />hazardous and designated waste classification are provided for comparison. Sludge <br />Telephone 209/836-1650 3900 Holly Drive Tracy, California 95376 <br />