ISI-Projects: Infrastructure

	San Bruno Water Treatment Plant. $40 Million in improvements and additions to existing water treatment plant just north of San Francisco Airport. ISI was originally hired by the general contractor, Monterey Mechanical, to perform soils compaction testing, moisture density curves, and masonry inspection. Later we were hired by CH2MHill to perform concrete sampling, concrete air content testing, concrete placement, and compression testing of concrete cylinders. In addition, we have sampled and tested lean concrete backfill for verification of early test results to complete backfill operations. Our field inspectors have been multi-disciplined in soils and concrete in order to perform soils compaction testing with a nuclear gauge and concrete placement inspections. On a typical day our inspector will split their time between these two activities and between working for CH2MHIll and Monterey Mechanical.
	Pulgas Water Treatment, San Francisco PUC ISI performed offsite/shop welding inspection of steel water pipe and offsite/shop reinforcing steel concrete water pipe. Photo at left is of ISI inspector, Bob Evans, measuring reinforcing bar placement for concrete water pipe fabrication.
	Harry Tracy Water Treatment Plant, San Francisco PUC ISI performed inspection of a new 100,000 gallon steel "sludge" tank for water plant treatment of sludge removal in lieu of returning sludge into Crystal Springs Reservoir. The tank is 30 ft. high and 30 ft. in diameter, with 3/8" and 1/4" tank shell and floor thickness joined by complete joint penetration and fillet welds. The foundation is concrete slab. ISI inspectors performed anchor installation and anchor proof load testing, anchor installation, shop and field welding inspection, ultrasonic testing of complete joint penetration welds and radiographic testing of complete joint penetration welds..
	Pier 3, The Embarcadero, San Francisco This project was the structural investigation of an existing pier that is supported by 900 16" square reinforced concrete piles. ISI investigated the existing condition of the piles for the structural engineer's evaluation. Initially, 4 3"X6" cores were extracted to determine the extent of damage to the reinforcing bar. Based on this evaluation, 38 selected piles were inspected, their conditions documented and ranked by their condition. Samples were also gathered for chlorine content testing.
	Geysers Recharge Project, Geyserville, CA For this City of Santa Rosa program, ISI inspected over 14 miles of buried 30" and 42" carbon steel pipe welds. ISI's scope of service consisted of the re-inspection of welds that were previously radiographed and the inspection of new welds. Because the pipeline was buried, inspections were performed with a special Ultrasonic Teating procedure from *inside* the pipe with penetrations up to 1,000 deep. ISI's work covered the segment from Geyserville up to Pump Station #4 in the geyser fields. 2003