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$project B02-01-02 Ms. Martha • October `;• Page 2 t r a description of operations for 5 years (1983 to 1988), but included a 280 tons -per -day waste tit on the permit form. The staff of California <Management •...• _ • r and District ragreed with the C' Of the San Joaquin Local Health Stocktondailywastequantityof 81 tpdstatedin the• 3 SWFP70rm was erroneous. •staff of both agencies calculated nage of 512 tpd by assuming that the facility operated 250 days per year and that the refuse density s 423 •y. addition, calculated •. 605,796 • _ from 1977 RDSI. t th this daily tonnage would be the average daily tonnage • • 19771 by the '. staff of these agencies have referred to this amount as a current maximum daily tonnage, andhave indicated that the SWFP could be modified to allow this maximum (512 i-• of to be accepted at the landfill. membersStaff of agencies have also indicated that a maximum daily ton- nage • a revised RDSI must be i -•' EVALUATIONOF The 1977 RDSI was referenced in the 1983 SWFP as "a description of site operations through 1988." Since the 1977 RDSI was used as the basis of both the 1977 and 1983 permits, the contents of the document can and should be utilized in determining the quantity of waste the landfill should presently be allowed to receive. Item #2 of the 1977 RDSI projected a 3 percent annual increase in waste quanti- ties. Table 1 shows the 814,139 cubic yards reported in the RDSI for 1987, and also shows the average daily waste forecast by the RDSI through the year 2000, based on the 3 percent annual increase. The 1990 average daily waste volume (based on a 7 -day week) is 2,438 cy/day. Using the waste density of 500 Ib/cy implied in the RDSI, EMCON has calculated that an average daily tonnage (for a 7 -day week) of 610 tpd in 1990 was forecast by the 1977 RDSI. Adjusting this figure for a 5 -1/2 -day operations week yields an average daily tonnage of 776 tl d. The 1977 RDSI also presented information that the peak month was September with 53,000 gate cy of waste. Table 1 shows the peak monthly waste quantities forecast by the RDSI through the year 2000. The 1990 peak monthly waste quantity was forecast at 77,832 cy, or 19,458 tons. For a 5 -1/2 -day operational week (23 days per month) the average daily tonnage for the 1990 peak month would be 846 tpd.