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Agreement On February 18, 1999, the EPA Region III and the Department of the Navy entered into a FFA for Naval Station Norfolk. One of the objectives of the FFA is to define a Site Screening Process (SSP) that is intended to provide a simplified investigative method whereby identified SSAs and AOCs can be evaluated to determine whether Remedial Investigations are required for these areas. 3.1.1 Determining Site Screening Areas If the EPA or Navy determines that an area on the Naval Station, which has not been previously identified as a SSA, poses a threat to public health or the environment, the other party shall be notified. The parties will then have forty-five (45) days from the notification to discuss the site conditions and determine if the site shall be addressed under the FFA as a SSA. 3.1.2 Establishing a Site Screening Area Any site that is established as a SSA will be added to the list in Appendix B of the FFA as an additional SSA. This may lead to an investigation and possible remediation in accordance with the requirements of the FFA. For any new SSAs, the Navy shall include in the next Draft Amended Site Management Plan a proposed time schedule for the submittal of a SSP Work Plan. This schedule shall be approved in accordance with Section XI of the FFA. 3.1.3 Site Screening Process The Navy shall submit to the EPA a SSP Work Plan, which outlines the activities necessary to determine if there has been a release of hazardous constituents to the environment. The scope of work shall be mutually agreed to by the EPA and the Navy. The SSP Work Plan shall also include a schedule for the submittal of the SSP report, which will be incorporated into the Site Management Plan. The SSP shall also include the following: 1. Upon conclusion of a SSP, the Navy shall submit to the EPA a draft SSP Report which shall provide the basis for a determination that either: a) a RI/FS be performed on the area addressed by the SSP or, b) the area does not pose a threat to the environment and therefore, the area should be removed from further study under the FFA. 2. Within sixty (60) days of receipt of the final SSP Report, the EPA and the Navy will determine if the SSA(s) will require a RI/FS. WDC051810002 3-1 SITE MANAGEMENT PLAN, FY 2006 3. For those SSAs which the EPA and Navy agree do not warrant an RI/FS, the Navy shall prepare a Decision Document that reflects that agreement. The agreement is to be signed by all the Project Managers. 4. For those SSAs that are to proceed with a RI/FS, OUs will be established. A schedule for the submission of the RI/FS Work Plan(s) is to be developed and incorporated into the next update of the SMP. 3.1.4 Areas of Concern For those areas that have been identified as AOCs, the Navy and EPA will go through a screening process as detailed below: 1. A document evaluation will be undertaken to review existing documentation and assessing information concerning the handling of hazardous waste at each AOC. The evaluation could also include (if agreed to by both EPA and the Navy) discrete sampling without developing a work plan. 2. Based on the document evaluation, the Project Managers will decide which AOCs will proceed to the SSP as SSAs and which AOCs will require no further action. 3. For those AOCs that will not proceed to the SSP, the Navy shall prepare, with EPA assistance, a brief AOC Closeout Document. The EPA shall provide a response to the Navy within thirty (30) days of receipt of the supporting documentation. 4. Those AOCs, which are not agreed upon by EPA and the Navy to be closed out, will proceed to the SSP. These sites will have schedules established for submittal of SSP work Plans. The schedules will be incorporated into the SMP. 3.2 Site Screening Process Tools Although the FFA provides an outline of the SSP for closing out SSA, the FFA does not provide a detailed process for site screening. As a result, The Tier I Partnering Team has developed several tools for rapidly screening a site to determine whether the site will require a full RI/FS or if it can be removed from further study. The following section describes the screening tools utilized at NSN. 3.2.1 Relative Risk Ranking The DoD developed a relative risk framework to evaluate the potential risk posed by a site in relation to other sites.

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