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0 <br /> Typical installations When installing vapor return piping, maintain a constant slope from dispenser <br /> (continued) to storage tank. Lines must be free of dips or low spots. Use optional thief port <br /> assembly as required to collect condensed product vapors. <br /> ® Pressure test entire system before completing backfill operation. <br /> Install vent caps per local code. <br /> Backfill material should be clean washed sand, pea gravel or crushed stone <br /> (max 1/2 inch). Never use native soils. <br /> Minimum burial depth is subject to local fire marshal regulations. <br /> It is necessary to consider state and local regulations as well as customer's <br /> specifications prior to installation. <br /> A typical three-product service station layout <br /> incorporating Stage l and Stage 11 vapor <br /> recovery.Ameron recommends the use of <br /> flexible connectors at dispensers and tanks. <br /> Alternatively,a 4-ft'dogleg"is allowable <br /> perAPl Specification 1615.System <br /> components are not shown to scale. it <br /> iC <br /> i <br /> Vapor return lines should maintain a constant <br /> slope from dispenser to tank.Although not <br /> shown in this Brewing, vapor and product fines <br /> are typically situated at the same subgrade <br /> elevation.Crossovers should be made as shown O <br /> in the photograph on page 12. <br /> Concrete <br /> Asphalt <br /> Approved fill <br /> Legend: Product Vapor 1111111111 <br /> 15 <br />