Mercury Emission Control System Progress Update

Introduction

The Somerset Raritan Valley Sewerage Authority (SRVSA) incinerates its residual wastewater solids, as the primary method of sewage sludge disposal.  Incineration reduces sludge volume and creates a stable product that can be landfilled.  Recent federal air emission requirements of 40 CFR Part 60 Standards of Performance for New Stationary Sources and Emission Guidelines for Existing Sources: Sewage Sludge Incineration Units (SSI MACT Rule) require that SRVSA reduce the incinerator mercury emissions by approximately 96%.  In order for SRVSA to achieve this level of mercury reduction, it is necessary to construct an air pollution control system utilizing carbon adsorption to scrub the incinerator flue gas.

 

The SRVSA is undergoing the Mercury Emission Control System Project in order to bring its incinerator into compliance with 40 CFR Part 60.  The Mercury Emission Control System Project includes design, procurement, construction, and testing of an air pollution control system.  The design has been completed and the General Construction Contract has been awarded.  The Notice to Proceed was issued to Iron Hills Construction, Inc. on July 31, 2017.

 

Vertical Flow Chart 112917

Progress Update Log:

November 20, 2017 Progress Update #4

Photo 6 (Update 4)

Photo 5 (Update 4)

As of November 20th, Iron Hills Construction, Inc. (General Construction Contractor or “GCC”) has completed the demolition of the existing equipment and ducting inside the R2 Building and has started the preparation work to install the new equipment.  The GCC’s subcontractors have completed the concrete slab installation for the new building, and started the erection of the steel framing for the new building.  The GCC’s electrical subcontractor has installed all the electrical cables required from the electrical substation to the R2 Building.  The GCC has also continued to accept delivery of equipment provided by Hankin Environmental Systems (Equipment Procurement Contractor or “EPC”).  The EPC is currently finalizing the shipment of all remaining equipment required for the project.  To date, the project is estimated to be 16.0% complete.

October 17, 2017 Progress Update #3

Photo 4 (Update 3)

As of October 17th, Iron Hills Construction, Inc. (General Construction Contractor or “GCC”) has completed the installation of the concrete foundation for the new building and the modifications to the R2 Building catwalk.  The GCC has also accepted delivery of various equipment provided by Hankin Environmental Systems (Equipment Procurement Contractor or “EPC”).  The GCC’s plumbing subcontractor has laid out the plumbing for the new building,and the electrical subcontractor has started laying out the underground electrical conduit.  To date, the project is estimated to be 7.0% complete.

September 19, 2017 Progress Update #2

Photo 3

Photo 2

As of September 19th, Iron Hills Construction, Inc. (General Construction Contractor or “GCC”) has completed the demolition of the sludge receiving station and the odor control ducting outside Building R2.  The GCC has also completed the installation of the new 4-inch diameter sanitary lateral line that will serve the new building.  The GCC’s electrical subcontractor has completed most of the major conduit installations in the basement of Building R2 and has finished the installation of the new electrical duct bank.  To date, the project is estimated to be 3.0%.

August 22, 2017 Progress Update #1

Photo 1

As of August 22nd, Iron Hills Construction, Inc. (General Construction Contractor or “GCC”) has mobilized to the site and installed silt fencing around the project area.  The GCC has also started excavation for the new building foundation and sanitary drain lines.