To the north along the lakefront is the site of the former General Boiler Company, a nineteen-acre parcel on Dahringer Road between the Midwest Generation Power Plant and the North Shore Sanitary District facility. A portion of this site is currently leased by a local contractor to recycle concrete and asphalt and to store construction materials. Its prior uses include the forming of steel boilers, the construction of pre-formed concrete posts, and the production of Styrofoam products. A 1993 Preliminary Environmental Property Assessment collected soil and groundwater samples showing elevated levels of several contaminants, including lead, barium, arsenic, and select polyaromatic hydrocarbons, and more testing was called for to fully characterize the presence of these and other pollutants.

In 1998 and 1999, further environmental analyses were performed on portions of this property, and it was confirmed that the northern section contained arsenic above remediation benchmarks in a fly ash fill area. Because "the remedial objectives and/or remedial action for the fly ash area (had) yet to be developed," the cleanup possibilities for this area could not be determined. It was also observed that a groundwater sample on the northwest corner of the site contained arsenic, which likely "migrated from the (Griess-Pfleger) Tannery site, " and thus could not be remediated without addressing that adjoining parcel. Concentrations of numerous pollutants in surface soils exceeded remediation objectives for industrial and commercial properties, being "stained black" with contamination from PCB's and PNA's including benzoanthracene, benzofluoranthene, benzopyrene, and dibenzoanthracene. A five-hundred gallon underground storage tank was also discovered on the General Boiler site that had leaked benzene and naphthalene into the groundwater, which also contained contamination from ethylbenzene and styrene.

Turning to potential health threats, the reports concluded that "the exposure pathway of concern is particulate inhalation/ingestion of surface soils" (breathing toxic dust), and "based on existing data, the impacted soil presents a potential risk to public health and the environment as well as a long term liability." Setting aside the fly ash and groundwater issues, a remedial action plan was proposed to reduce the pollution in certain areas of soils to levels below health-risk benchmarks and remediation objectives. The PCB and PNA-impacted soils would be excavated in six-inch lifts and disposed of in appropriate landfills until the contamination was sufficiently reduced or groundwater was encountered. A covering would then be applied to seal off the surface, to be followed by a backfill of clean soil. The underground storage tank would be drained and removed from the ground, along with all piping and appurtenant structures. Soils in the vicinity of the tank that contained volatile organic compounds or other toxins would also be excavated and sealed.

While this remediation plan was only a partial solution, it pointed in a positive direction, but there is no evidence in the environmental records that any implementation has occurred since the plan was formulated in 1999. Even had the remediation plan been fully implemented, portions of this site would only have reached a suitable level for industrial or commercial use as a best case scenario, and additional approaches would still have been needed to deal with the fly ash and groundwater contamination. Despite the questions that remain about the full extent of potentially dangerous pollution and the degrees of remediation that are feasible, the SOM redevelopment plan proposes that we use the General Boiler site as part of a moorland, a place of public recreation. Granted, this is somewhat less of a disconnect than putting residences on the OMC/Coke Plant parcel, but even recreational development would seem to be a substantial stretch until further testing and more comprehensive remediation plans show that open public access to this site, with complete safety for intended users like families and children, can become a viable option. The same can be said of the nearby North Shore Gas coal gas plant site (aka Tar Pits), south of Dahringer Road, upon which a litany of toxins has been identified, running the alphabet from arsenic to xylene. The EPA has called for restricted public access to this site, but SOM includes it as an additional component of the recreational moorland.