Condition Assessment of Dominguez Gap Barrier
Pacifica provided Construction Management and Inspection Services for the ongoing condition assessment of the Dominguez Gap Barrier project facilities, which included approximately 35,000 linear feet of pipeline, 13 injection wells, and 50 observation wells. The project consisted of acoustical pipeline segment testing, potholing, observation and injection well monitoring and inspections, as well as associated traffic control planning and execution.
The project team provided support for evaluating the risk of asset failure and providing observation and documentation on the condition of the pipelines and vaults, depth to water, and total depth measurements for the final preparation and issuance of a final assessment report to the County. Pacifica was also responsible for the coordination efforts with the Los Angeles County Department of Public Works, City of Wilmington, City of Carson, and other project stakeholders.
Upper San Gabriel River (USGR) Enhanced Watershed Management Program (EWMP) Group Coordinated Integrated Monitoring Program (CIMP)
Pacifica assisted in the implementation of the non-stormwater outfall screening portion of the USGR EWMP Group Draft CIMP in accordance with the December 28, 2012, MS4 Permit. The CIMP utilizes alternative approaches to meet the primary objectives of the Monitoring and Report Program (MRP) of the MS4 permit. While this CIMP focused on non-stormwater outfall screening and monitoring, subsequent CIMPs will address receiving water monitoring, TMDL receiving water monitoring, and stormwater outfall monitoring. The CIMP was implemented to provide the information necessary to guide management decisions in addition to providing a means to measure compliance with the MS4 Permit.
Pacifica personnel performed three (3) dry-weather screening events for outfalls within the EWMP area. The initial screening assessed outfalls twelve (12) inches and greater in diameter and provided the dual purpose of data collection for completing the outfall database and initial evaluation of outfalls. The subsequent screenings collected visual information on outfalls 36 inches and greater and outfalls between 12 inches and 36 inches in diameter in locations near industrial areas.