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y � <br /> �OUNGDAHI� len ( � or oHi11s,CA95762�� <br /> ckliq CA 95677 <br /> CONSULTING GROUP, INC. ph 916.983.0633 Cx 916.933.6482 <br /> Building Innovative Solutions FFR2B 901fi www.youngdahLnet <br /> Air& Lube Systems ENVIRONMENTAeroject No. E15339.000 <br /> 8353 Demetre Avenue HEP.ITH!?FPARTMENT 2 December 2015 <br /> Sacramento, California 95828 <br /> Attention: Mr. Josh Hoover <br /> Subject: SOUTH SINCLAIR AVENUE (2110) <br /> 2110 South Sinclair Ave., Stockton, San Joaquin County, California <br /> SUMMARY OF SPECIAL INSPECTION AND MATERIALS TESTING SERVICES <br /> References: 1. Executed Contract for South Sinclair Avenue(2110), prepared by Youngdahl Consulting Group <br /> Inc., dated 20 November 2015(Project No. E15339.000). <br /> Dear Mr. Hoover: <br /> As requested, Youngdahl Consulting Group, Inc. has provided special inspection and materials <br /> testing services from 23 through 24 November 2015 for the above referenced project. We <br /> understand that special inspection services for construction operations at the subject project are <br /> complete. <br /> Our scope of special inspection services for the above reference project was comprised of the <br /> tasks listed below, and are summarized in this report. <br /> • Field Observation of Structural Steel and Welding Operations <br /> • Observation of Pressure Testing for Thermal Relief Valves <br /> • Torque Testing <br /> Structural Steel and Welding <br /> Our certified inspector performed field structural steel and welding observation at South Sinclair <br /> Ave. in Stockton, California for the completed welded connections of two thermal bracket <br /> supports. We reviewed the fabricator's welding procedures and welder qualifications. <br /> Connections were welded using the FCAW process with NR-232 wire. The locations were <br /> observed to be performed in accordance with the project plans, specifications, and code <br /> requirements. <br /> Pressure Testing <br /> Our inspector observed pressure testing of four thermal relief valves for the oil tanks. The <br /> valves were brought to 110% of the pressure stated on the plan. We then visually observed <br /> tank pressure again after 24 hours and noted the required pressures had been maintained. Our <br /> observations indicate that each valve is within minimum pressure according to project plans and <br /> specifications. <br /> Torque Testing <br /> Our inspector performed torque testing for connections of the 1/2" anchor bolts supporting the oil <br /> tanks to the concrete slab-on-grade. Our tests, inspections, and records of observations <br /> indicate that the high strength bolting operations were performed in accordance with the project <br /> plans and specifications. <br />