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After the Windrows are formed, them-~ophilic decomposition of the ground yard waste <br />begins. The objective for this part of the process is to maintain the ideal environment <br />for composting, i.e. temperature, moisture, and oXygen Content. The windrows are <br />monitored for these parameters and other characteristics to assist OMCF staff in <br />process management. <br /> <br />Windrows are periodically "turned" during the active compost cycle using a Scarab <br />windrow turner. The Scarab aerates the compost piles and macerates the material, <br />exposing new surfaced area for continued microbial degradation. Windrows at <br />OMCF will typically be turned two or three times a week depending on the moisture <br />and the temperature. <br /> <br />Compost Monitoring <br /> <br />Sampling and monitonng material dunng the active composting stage allows OMCF <br />staff to make process changes that maximize material degradation. The OMCF will <br />nave a in-house lab technician to measure the temperature, oxygen content, pH, anc~ <br />total volatile solids of the compost to assist the OMCF staff in making decisions <br />regarding management of the windrows. Compost monitoring frequency may vary <br />depending upon the condition of compost, seasonal fluctuations in weather and <br />feedstock, and operational constraints. <br /> <br />Windrow 'Temperature <br /> <br />Compost pile temperature is an indication of microbial activity. Abnormally Iow <br />temperatures are a sign of reduced activity, and high temperatures are an indication <br />of strong activity. In addition, windrow temperatures measured over time give an <br />indication of the overall level of degradation, quantity of organic matter, and general <br />health of the windrow. The temperature monitoring program to be used at the OMCF <br />is typical of many leaf and yard waste composting operatiOns. <br /> <br />Each windrow is measured as a single entity. Temperatures are taken every two- <br />hundred (200) linear feet of windrow and measured at the following three depths: <br /> <br /> 1. Center of the pile <br /> 2. 2-3 feet below the surface of pile <br /> 3. 6-9 inches below the surface of the pile <br /> <br /> 5 <br /> <br /> <br />