Remedy Design

Atlantic Richfield is already moving forward to perform the investigation and conduct the benchmark studies necessary to design the remedy approved by NYSDEC.

Atlantic Richfield moving forward on designing remedy for One River Street

The first task in conducting the remedy agreed to by New York State Department of Environmental Conservation (NYSDEC) and Atlantic Richfield Company (AR) is to conduct a set of baseline studies, as well as complete investigations necessary to design the remedy.

AR did not wait for the final consent order, but moved forward with work in fall of 2013.

• Even before signing the final consent order in 2013, AR already began efforts to move the final remedy forward.AR provided work plans for NYSDEC review six months prior to signing the consent order to proactively discuss next steps and provide information so design investigations could begin.
• AR conducted baselines studies of conditions in and adjacent to the Hudson River, including collecting fish tissue samples, conducting macroinvertebrate and habitat information studies, and sampling surface water, river sediments, and porewater (the water trapped in sediments). These studies will continue in 2014 and 2015.
• AR additionally conducted offshore probes to identify potential obstructions to future work and provide information to construct the northwest extension.
• Onshore, AR used borings to explore the fill originally used to construct the waterfront, probed for obstructions and voids under the surface, installed seven monitoring wells, and took soil samples to provide pre-excavation metals and PCB information to direct the location of future work. AR also completed geotechnical borings which will be used for remedy design.

In 2014, AR began to complete the initial remedy design. In order to do that, we conducted further investigations onshore to delineate excavation areas, as well as to further identify subsurface obstructions and locate existing and abandoned utilities. Offshore, we further delineated areas which may require dredging, as well as began to determine dredge limits. In addition, we advanced additional geotechnical borings offshore for remedy design.

In 2015; Atlantic Richfield performed additional off-shore sampling to supplement the pre-design investigation as well as completed the baseline surveys (fish collection and baseline air monitoring) to further the collection of information necessary for the remedy design and post remedy monitoring.

AR also submitted several documents in 2015 to further the remedial design including;

• The Pre-Design Investigation Data Summary Report — submitted to NYSDEC in August 2015
• Baseline Data Summary Report — Year 1 & 2 — submitted to NYSDEC in October 2015
• Risk-based Disposal Application for the Toxic Substances Control Act — submitted to USEPA in November 2015

In 2016, Atlantic Richfield continued pre-design activities and performed the following work;

• Abandonment of over 40 monitoring wells on the site with reporting to NYSDEC
• Continued the baseline groundwater monitoring program and analyzed the last year of biota from the baseline fish collection
• Additional sediment sampling in the Hudson River offshore of the site as well as in Kinnally Cove as approved by NYSDEC
• Sampled materials in Building 52 for the management of the pending demolition and provided a waste management strategy report to USEPA and NYSDEC

Atlantic Richfield has reached a significant milestone with the submittal of the Preliminary Design for Operable Unit 1 (OU1) and Operable Unit 2 (OU2) to the New York State Department of Environmental Conservation (Department) on November 29, 2017. This Preliminary Design was prepared pursuant to the NYSDEC's OU1 Amended Record of Decision (ROD) and OU2 ROD; as well as the Amended Order on Consent; the Remedial Design Work Plan; and the Pre-Design Investigation Data Summary Report with additional data. The Preliminary Design provides a basis of design for the remedy and initial design elements which will be reviewed and discussed with the Department and various stakeholders for the preparation and submittal of the Final Design.