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REV: 10-05-21 RL <br />The State Water Resources Control Board (SWRCB) may require a supplemental Title <br />22 Engineering Report for Dual-plumbed buildings or sites that may have unusual <br />conversion requirements. If requested by the City, Consultant shall prepare a draft and <br />final Title 22 Engineering Report as part of the efforts associated with Task 8. <br />Consultant shall submit electronically in PDF format the City and any other requested <br />parties <br />90% stage draft retrofit plans within four weeks of the field investigation <br />Final retrofit plans within two weeks from receipt of City and any other approved <br />party comments <br />Task 3 - Evaluate recycled water sites to determine eligibility for a pressure cross <br />connection test <br />This task shall be performed by an AWWA-certified Cross Connection Control Specialist <br />(“Specialist”). <br />As directed by the City, Specialist and the City shall visit a site with the site’s <br />representative to determine if a pressure cross-connection shutdown test could be <br />conducted as an alternative to a standard cross-connection shutdown test. For both the <br />potable and recycled water systems, the Specialist shall assess: <br />Potential test point locations for the pressure gauges such as reduce pressure <br />backflow prevention assemblies, quick coupler valves, hose bibs, etc. <br />Site complexity such as internal potable facilities that may automatically turn on <br />and thus potentially interfere with the potable cross-connection shutdown test <br />For a dual-plumbed site, the elevation of the building and the possibility to isolate <br />floors so that a pressure differential and a pressure residual can be obtained. <br />Any other site-specific conditions that may preclude a pressure cross-connection <br />shutdown test <br />Specialist shall submit electronically in PDF format to the City a pressure test evaluation <br />letter describing the results of their assessment within five days of the site visit. <br />Task 4 - Plan and perform pressure cross connection tests <br />A Specialist shall conduct a potable and recycled water pressure cross-connection <br />shutdown test at a site in the presence of the site’s representative. The Specialist shall <br />provide the equipment and tools required for the test and be available to perform the test <br />during regular business hours, nights, or weekends. <br />Potable Pressure Cross-Connection Shutdown Test <br />Specialist shall conduct the potable pressure cross-connection shutdown test as follows: <br />On all potable water meters, the Specialist shall install digital pressure recorders <br />on all reduced pressure principal backflow prevention assemblies <br />The Specialist shall verify that the recorders are operating properly and allowed <br />to track under full pressure for at least 10 minutes before isolating and <br />depressurizing the system <br />ATTY/AGR.2021.253/West Yost & Associates, Inc. (Page 13 of 18)