Haaker Underground operates its San Diego regional branch in Santee at Mission Park Place, functioning as an authorized dealer and service center for Vactor sewer cleaning trucks, TRUVAC hydro excavation units, and Elgin street sweepers. Municipal sewer-line maintenance performed with Haaker-supplied combination jet/vac trucks directly supports underground utility contractors and plumbing firms including All Time Plumbing on Mission Gorge Road, whose crews depend on clean-line access for repair and relining work. The parent company, Haaker Equipment Company, has operated since the early 1980s from its La Verne headquarters, expanding to seven branch locations across California, Nevada, and Arizona with the Santee facility covering all of San Diego County. Factory-trained technicians at the Mission Park Place service bay perform vacuum pump rebuilds, hydraulic system repairs, and PTO-driven jetting system overhauls on Vactor 2100 Plus and TRUVAC Paradigm chassis-mounted units. Pre-paving utility verification using TRUVAC air-and-water excavation reduces underground strike risk for civil contractors including Accurate Grading & Paving on Argent Street, whose grading crews require pothole clearance before final subgrade compaction. Highest-capacity rental units include the TRUVAC Paradigm with 15-cubic-yard debris tank, 27-foot telescopic boom with 320-degree rotation, and dual fan system generating 5,250 CFM at 27 inches Hg for non-destructive subsurface utility engineering.