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service shops, trucking operators, service stations, and garages located <br /> throughout San Joaquin County and other nearby counties. Upon arrival at <br /> the site the lubricants would be sampled and tested using the on-site lab <br /> facilities to ensure that no unknown or off-specification contaminants <br /> are contained in the batch. Very strict controls would be imposed to <br /> ensure the facility receives only lubricants within legal and contractual <br /> terms. Specifications for acceptance of waste lubricants would meet <br /> applicable state and federal regulations (e.g. , requirements for recycled <br /> oil set forth in the Health and Safety Code, Section 25250. 1) . Waste oil <br /> recovery facilities must be permitted under the California Department of <br /> Health Services (DHS) . <br /> Off-specification shipments would either be returned to the genera- <br /> tor or taken to an authorized disposal site. The waste oil recovery <br /> process consists of filtering, water separation, and evaporation <br /> (settling) . Water separated in the process would be evaporated in the <br /> biomass drying process. Contaminants (dirt, metal shavings, tank bottom <br /> sludge, etc. ) generated in the filtration process and cleaning operations <br /> would be properly containerized and shipped to an authorized <br /> disposal site. Up to 140 gallons of sludge would be produced every two <br /> weeks. Sludge disposal is addressed in greater detail in the "Public <br /> Utilities and Services" section of Chapter 3. <br /> A process flow diagram of the waste oil recovery system is shown in <br /> Figure 2.5. After shipments are accepted for processing, the used lubri - <br /> cants would be transferred into one of three Used Lubricant Storage <br /> Tanks. These would be vertical , fixed-roof tanks vented through flame <br /> arrestors. The Pump Station would include a positive displacement <br /> unloading pump, electronic flow metering and a duplex filter for removal <br /> of fines. Each storage tank would be fitted for steam coil heating to <br /> decrease the lubricant density as an aid to the first step of water <br /> separation. <br /> The used lubricants would be metered continuously through a pre- <br /> heater and into the first of three settling tanks where oil/water separa- <br /> tion occurs. The lower density continuous-phase lubricant would <br /> 2-15 <br /> I01-46.R4 4/7/89 <br />