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15.4.2. SETTING THE LEVEL OF THE MONITORING FLUID 15.4.2.1. After backfilling and placement of top slab is completed, check the level of the monitoring fluid in the reservoir. (See SECTION 15.4.3. if using an electronic monitoring system.) 15.4.2.2. The monitoring fluid should be set to a depth of 7 inches in the reservoir. Add or remove monitoring fluid to reach this depth. 15.4.2.3. The level of the monitoring fluid may fluctuate due to such things as: • groundwater fluctuation, • tank filling and emptying, • product temperature variation. 15.4.3. PROBE INSTALLATION 15.4.3.1. If the tank contains product, stick the tank and set the monitoring -fluid level based on the product level. (See Points 15.4.3.4., 15.4.3.5. and 15.4.3.6.) 15.4.3.2. The probe must remain in contact with the tank top at all times. Do not raise the probe off the tank to meet the monitoring -fluid level. Add or remove monitoring fluid to change the level on the sensor. (See FIGURE 15-2.) Top Slab /F(by others) T Street Box and Electrical Vent Reservoir/ Hookup Standpipe (by others) Standpipe (by others) Sensor Cable Reservoir Sensor Monitoring -Fluid Level Tank Rib (cut away for sensor placement) FIGURE 15-2 15.4.3.3. The typical probe has two sensors (a high -fluid level and a low -fluid level). While the probe is upright, locate the midpoint between the two sensors. 15.4.3.4. If the tank is between empty and 1/4 full, set the monitoring -fluid level at about 1 -1 1/2 inches below the midpoint of the two sensors. 15.4.3.5. If the product level is between 1/4 and 1/2 full, set the monitoring -fluid level to the midpoint of the two sensors. 15.4.3.6. If the product level is between 1/2 full and full, set the monitoring -fluid level to about 1 -1 1/2 inches above the midpoint of the two sensors. 21 11 15.4.4. TRUCHEK® 15.4.4.1. If a TRUCHEK® test is required after installation, follow the procedures in the Xerxes TRUCHEK® brochure. 15.4.4.2. After this test, reset the monitoring -fluid level to a position based on the product level. (See SECTION 15.4.2. and SECTION 15.4.3.) 16.1. GENERAL 16.1.1. The containment sump is a termination point for secondary piping systems. It is designed to be monitored continuously for leaks using electronic sensors. Consult federal, state and local codes and regulations to ensure proper monitoring compliance. WARNING The containment sump system is a contined space, which may contain hazardous vapors. If work is to be performed inside the sump, test the atmosphere inside and, if necessary, vent the space to prevent the development of vacuum or pressure. Failure to do so could result in death or serious injury. ®WARNING Use air -powered tools to prevent shock, fire or explosion from flammable liquids and vapors. Failure to do so could result in death or serious injury. ®CAUTION Always wear gloves when handling containment sump components, and always wear eye protection when grinding, cutting and attaching the sump unit. Failure to do so may result in minor or moderate injury. Do not drop the containment sump assembly components or allow the sump body to roll. Since high winds could damage the sump components, protect and secure all pieces if windy conditions arise. Failure to follow this caution may result in minor or moderate injury. CAUTION Failure to follow these instructions may cause water -seal failure, and may result in property damage. 16.1.2. Visually inspect all pieces and parts to make sure that no shipping or handling damage has occurred. If any components are missing, contact the UST coordinator at the Xerxes plant nearest you. (See FIGURE 16-1 or FIGURE 16-2.) 16.1.3. Do not attempt any repairs to damaged containment sump components. If damage is detected, contact the UST coordinator at the Xerxes plant nearest you.