David Tang - Principal Construction Inspector

District W3 provides inspection and contract management services for a variety of sewer programs and projects. The programs include Capital Improvement/Collection Systems major Sewers; Sewer Rehabilitation; Super Expedited Wastewater Emergency Rehabilitation for Sewers (SEWERS); Secondary Sewer Renewal Projects (SSRP) and Emergency Sewer and Storm Drain Repairs (ESR & ESDR).

Inspectors assigned to this district are available 24/7 for sewer related emergency in the City.

Some of the current projects under construction or ready to start are:

ALVARADO / CRANDALL RELIEF SEWER

This project will relieve the existing overloaded wastewater collection systems in the Westlake, Silver Lake and Echo Park areas by placing approximately 4,750 feet of 12- and 24-inch diameter sewer pipes utilizing trenchless construction method.
The project alignment begins at the intersection of Rampart Boulevard and Beverly Boulevard and extends east along Beverly Boulevard to Alvarado Street and then continues north along Alvarado Street to Bellevue Avenue.

AVENUE 45 AND ARROYO DRIVE RELIEF SEWER

This project will relieve the existing overloaded primary wastewater collection systems in the Eagle Rock and Highland Park areas by placing approximately 13,170 feet of 8- to 42-inch diameter sewer pipes.
The project utilizes both open-cut and tunneling methods. Sewer lines will be placed adjacent to the Pasadena Freeway from Figueroa Street and Avenue 45 to Arroyo Glen Street and Avenue 63.
The project is on schedule and is expected to complete per the Environmental Protection Agency (EPA)/Baykeeper Settlement Agreement.

RIVERDALE AVENUE GREEN STREET PROJECT

This project will demonstrate the sue of stormwater planters to treat and infiltrate stormwater runoff, thereby providing water quality and fold control benefits.
A primary goal is to create a model for a new standard of residential street design, ultimately reducing stormwater and urban runoff from streets.

TRAPP MAINTENANCE HOLE PHASE I

This project consists of remodeling 29 sewer maintenance hole bases and replacing twenty 8-inch gas traps, two 10-inch gas traps, five 12-inch gas traps, and two new 15-inch gas traps that will be provided by the City for installation into these maintenance holes to eliminate sewer odors in the adjoining community.

DOWNTOWN L.A. LOW FLOW DIVERSION PROJECT

This project consists of the construction of a Low-Flow Diversion (LFD) which will divert year round dry weather flow from a 97" diameter storm drain line on 7th Street to a nearby sanitary line (ECIS) on Santa Fe Avenue south of 7th Street for conveyance to Hyperion Treatment Plant for treatment.

During the last fiscal year (FY 09-10), the bureau processed payment request for 167 Emergency Sewer Repair projects and 370 SEWERS and Rehab 1 projects totaling $16,284,304.26 and $4,500,100.17 respectively.