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F ERIALS AND METHODS E VOLUME QUANTIFICATION stigation began by attempting to accurately determine the average numbers and types ofat the subject facility, so that total manure volumes could be calculated. The use of ted mathematics to assess the population dynamics existing at the facility is beyond the this investigation. Several factors substantially affect manure volumes from the time of to the time of export, or on-site soil incorporation. Manure production variables exist volumes cannot be accurately quantified without direct observation and testing over a pf at least one year. The aforementioned holiday seasons create significant variability in animal populations. Populations will also increase during market price increases, and decrease during market price downturns and"slow times" of the year. During the course of this investigation, it was our observation that the combined population for all animal types never came close to the maximum allowable population. Based upon this observation,the daily average of the total number of animals will fluctuate below the total allowable number of animals,thus creating an automatic safety factor. This safety factor is estimated to be 1.5. Consequently,the daily animal population will theoretically fluctuate around 66%of the maximum 500 animals, on average, throughout each year. To simplify the mathematics of the animal population dynamics and subsequent manure production,the maximum permitted population of 500 animals will be used to calculate manure volume production. These calculations exclude the estimated safety factor described above. The following Table illustrates the volume of total raw manure (as excreted)production from each of the respective animal types,with the total number per day estimated by Mr. Stagno: MANURE PRODUCTION VOLUME FROM ANIMALS TO BE SLAUGHTERED: ft'/day/1000# ANIMAL TOTAL WDAY ESTIMATED WEIGHT RAW MANURE fP/day (TOTAL SOLIDS AND TOTAL URINE/LIOUID) BOARS 4 400 0.53 SOWS 4 350 0.62 MARKET PIGS 350 120 42.0 SHEEP 40 220 5.5 GOATS 52 200 6.6 CALVES 50 750 35.6 TOTALS 500 97.7#/1000# 91 fl/day A minimum reduction of 75% in manure moisture content, and therefore volume, can be expected during eight months of favorable weather storage time. Storage time will be variable; however,there should be 120-day storage capacity during the winter months(December through March) when soil incorporation may not be possible. Moisture content reduction is evident in Photographic Plate A, which illustrates a mound of manure representing 6 months of accumulation(May through October 2000). Moisture analysis reveals this manure pile to have a moisture content of 12.6%. Therefore, 75%moisture reduction is conservative. Page -2- Vafley Ag Research