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SPCC for Antonini Enterorises Lathrop Facility <br /> AGT 3 and AGT 4 and the distance to the retention pond makes it unlikely that a spill <br /> would reach the pond; however, the retention pond acts as secondary containment in <br /> this scenario. <br /> 3) A worst case scenario would be a simultaneous breach of both AGT 3 and AGT 4. In <br /> this scenario, a combined 30-gallons of diesel fuel could be released. The release would <br /> flow in a southerly direction toward Stormwater Retention Pond 1, which acts as <br /> secondary containment in this scenario. The retention pond would be the end point of <br /> the spill. This scenario would likely be caused by a vehicle crash into AGT 3 and AGT 4. <br /> It is highly unlikely as vehicle speeds are controlled at the facility. <br /> AGT 5: Approximate 200-Gallon Diesel Tank <br /> There are two potential spill scenarios associated with this emergency generator AGT. <br /> 1) Overflow during resupply. If this occurred, the release would likely be less than 2 gpm <br /> with release volume less than 5 gallons. Spill should be noted by delivery person and <br /> quickly abated. <br /> 2) Hole or breach in bottom of AGT 5. Flow from such a leak would vary depending on size <br /> of hole, but would likely be a stress fracture with relatively slow release rate of less than <br /> 1 gpm. It is possible that such a release could empty the entire tank (approximately 200 <br /> gallons) if not witnessed and would flow towards the Stormwater Retention Pond 2. <br /> This scenario could also be caused by a vehicle crash into AGT 5, although it is unlikely <br /> because vehicle speeds are controlled at the facility and the generator is protected by <br /> concrete-filled steel bollards on all sides. <br /> AGT 6: 480-Gallon Waste Oil Collection Tank <br /> This AGT is located within the Maintenance Shop Area. There are three possible spill <br /> scenarios attributed to this AGT. <br /> 1) Overfilling of AGT 6 by shop personnel. This could occur when the AGT is near capacity <br /> and is overfilled. The volume would be small (less than 5 gallons) as the AGT is hand- <br /> filled using drain pans. This AGT is a double-wall tank and the spill would be contained <br /> within the secondary containment provided by the outer tank wall. <br /> 2) Hole in bottom of AGT 6. Flow from such a leak would vary depending on size of hole, <br /> but would likely be a stress fracture with relatively slow release rate of less than 5 gpm. <br /> This release would be controlled within the secondary containment provided by the <br /> outer tank wall. <br /> 3) A worst case scenario would be a simultaneous breach of both walls of AGT 6. In this <br /> scenario it is possible that all 480 gallons of waste oil could be released. Such a release <br /> would flow across the concrete floor of the Maintenance Shop and outside to the asphalt <br /> surface to the east. If not abated, a release would flow towards the gutter and ultimately <br /> to Stormwater Retention Pond 1 which acts as secondary containment in this scenario. <br /> The eastern drainage ditch and southern retention pond would be the end point of the <br /> spill. <br /> AGT 7: 400-Gallon Fresh Oil Tank <br /> This AGT is located within the Maintenance Shop Area. There are three possible spill <br /> scenarios with this tanks. <br /> 1) Overflow during resupply. If this occurred, the release would likely be less than 2 gpm <br /> with release volume less than 5 gallons. This AGT is a double-wall tank and the spill <br /> would be contained within the secondary containment provided by the outer tank wall, <br /> 2) Hole in bottom of AGT 7. Flow from such a leak would vary depending on size of hole, <br /> but would likely be a stress fracture with relatively slow release rate of less than 5 gpm. <br /> -6- <br />