Design-Build Team Members
Johnston Construction Company was one of several prime contractors, working with SCS Engineers, PC as the Construction Manager, providing mechanical construction services for the $618,999 public-bid fixed price contract.
The project involved the construction of a landfill gas sulfur scrubbing system at the Warren County District Landfill (WCDL) located in Oxford, NJ. The WCDL is a 45 acre regional landfill owned and operated by the PCFAWC that began operation in September 1990 for the disposal of non-hazardous solid wastes in northwestern New Jersey. The PCFAWC then contracted with an energy developer in 2005 to construct, own, and operate a 3.8 megawatt landfill gas (LFG) to electricity facility (LFGTE) at the landfill.
The PCFAWC reviewed several commercially available technologies and selected the MINI-CAT by Gas Technology Products to achieve the required H2S concentration. The MINI-CAT sulfur scrubbing system is capable of removing about 1 ton per day of sulfur from LFG. The sulfur scrubbing system was constructed along with: six fiberglass tanks varying in size from 2’ in diameter and 10’ tall to 7’ in diameter and 20’ tall; pumps and blowers; steel framing and grating; a belt press; air compressor; and, piping to include FRP, PVC, and SST.
Design of the project started in June 2005 and when construction began in March 2006, Johnston Construction Company contributed to an early completion schedule by October 2006 that was within the 18 month construction schedule for both the LFG and LFGTE.
Johnston Construction Company started mechanical construction in May 2006. The mechanical construction and performance testing was completed in August 2006.