DESCRIPTION:  This project will rehabilitate 16 trunk manholes on Martinez Refining Company property, primarily addressing corroding frames and covers, corroding steps, corroding concrete, and delaminating liners.  New interior coatings will be installed, and a few manholes will be raised or lowered to grade.

JUSTIFICATION:  When present in a wastewater environment, hydrogen sulfide gas can be highly corrosive over time, leading to accelerated deterioration of concrete, certain types of steel, and other materials.  To extend the service life of a manhole, components that have deteriorated due to corrosion should be replaced, and corrosion protections should be installed on all components.  Manholes should be raised or lowered to improve access and eliminate safety concerns.

ESTIMATED TOTAL PROJECT COST:  $594,000

ANTICIPATED CONSTRUCTION COMPLETION:  2026