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Vapor Riser <br />Threaded Elb, <br />0 <br />APMMI� <br />Typical Vapor Recovery Riser Offset <br />Threaded Cap <br />(typical) <br />*Extractor or Tee <br />Threaded toRiser <br />or direclty into tank <br />'Vapor Riser or Fitting <br />threaded directly into <br />tank bung <br />Note: This figure represents one instance where a vapor recovery riser has been offset <br />in order to construct a two-point Phase I vapor recovery system. The above figure <br />illustrates an offset using a 90 -degree elbow. However, in some instances, elbows less <br />than 90 degrees may be used. All fittings and pipe nipples shall be 4 -inch diameter <br />similar to those of the spill container and rotatable Phase I adaptors in order to reduce <br />back pressure during a gasoline delivery. <br />Executive Order VR -102-E, OPW Phase I Vapor Recovery System, Exhibit 2, Page 10 <br />