[Federal Register Volume 83, Number 156 (Monday, August 13, 2018)]
[Proposed Rules]
[Pages 39978-39979]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-16801]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 300

[EPA-HQ-OLEM-2017-0603; FRL-9981-49-OLEM]


Documentation Supporting the Proposal of the Orange County North 
Basin Site; Addendum Availability

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule; notice of data availability.

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SUMMARY: This notice provides an opportunity to comment on additional 
reference documentation for the Orange County North Basin site in 
Orange County, California. The site was proposed to the National 
Priorities List (NPL) on January 18, 2018.

DATES: Comments must be submitted (postmarked) on or before September 
12, 2018.

ADDRESSES: Submit your comments, identified by docket number EPA-HQ-
OLEM-2017-0603, at https://www.regulations.gov. Follow the online 
instructions for submitting comments. Once submitted, comments cannot 
be edited or removed from Regulations.gov. The EPA may publish any 
comment received to its public docket. Do not submit electronically any 
information you consider to be Confidential Business Information (CBI) 
or other information whose disclosure is restricted by statute. 
Multimedia submissions (audio, video, etc.) must be accompanied by a 
written comment. The written comment is considered the official comment 
and should include discussion of all points you wish to make. The EPA 
will generally not consider comments or comment contents located 
outside of the primary submission (i.e., on the web, cloud, or other 
file sharing system). For additional submission methods, the full EPA 
public comment policy, information about CBI or multimedia submissions, 
and general guidance on making effective comments, please visit https://www.epa.gov/dockets/commenting-epa-dockets.
    To send a comment via the United States Postal Service, use the 
following address: U.S. Environmental Protection Agency, EPA Superfund 
Docket Center, Mailcode 28221T, 1200 Pennsylvania Avenue NW, 
Washington, DC 20460. Use the Docket Center address below if you are 
using express mail, commercial delivery, hand delivery or courier. 
Delivery verification signatures will be available only during regular 
business hours: EPA Superfund Docket Center, WJC West Building, Room 
3334, 1301 Constitution Avenue NW, Washington, DC 20004.

FOR FURTHER INFORMATION CONTACT: Jennifer Wendel, phone: (404) 562-
8799, email: [email protected], Site Assessment and Remedy 
Decisions Branch, Assessment and Remediation Division, Office of 
Superfund Remediation and Technology Innovation (Mail Code 5204P), U.S. 
Environmental Protection Agency, 1200 Pennsylvania Avenue NW, 
Washington, DC 20460.

SUPPLEMENTARY INFORMATION: 
    The site was proposed to the National Priorities List (NPL) on 
January 18, 2018 (83 FR 2576).

Site Geological Information

    One commenter questioned the EPA's use of a reference in the HRS 
documentation record (HRS Reference 110--the 3DVA Technical Memorandum) 
to support aquifer interconnection and contaminant migration. EPA notes 
that the reference in question is a model, and analysis, of the 
hydrology and geology in the vicinity of the Orange County North Basin 
site. The commenter stated that the EPA cites to HRS Reference 110 and 
presents conclusions in the HRS documentation record based on the model 
in the reference that used well borehole and lithology data that was 
not

[[Page 39979]]

available to the public to review to confirm the reliability of the 
reference.
    The EPA has examined this issue and has decided to provide the 
relevant documentation used to develop the content presented in the 
reference. This information includes well logs and lithology reports 
for the wells which were used to produce HRS Reference 110--the 3DVA 
Technical Memorandum. This data will be included as one reference to 
the HRS documentation record and the EPA is providing this additional 
document for public review and comment. This document is available at 
the Regional office in San Francisco, CA. Anyone wishing to comment on 
the information in the reference or the impact this data may have on 
the HRS score for the proposed Orange County North Basin site should do 
so within the next 30 calendar days (see DATES section at the beginning 
of this notice). Additional comments will not be accepted on other HRS 
scoring issues which could have appropriately been raised during the 
original comment period and are not based on information provided in 
these additional references.
    Comments should be submitted pursuant to instructions in the 
ADDRESSEES section of this notice; they may be submitted 
electronically, by mail or by express mail. The docket number for this 
site is EPA-HQ-OLEM-2017-0603 and should be identified in any 
correspondence/electronic submission.

    Dated: July 16, 2018.
James E. Woolford,
Director, Office of Superfund Remediation and Technology Innovation.
[FR Doc. 2018-16801 Filed 8-10-18; 8:45 am]
 BILLING CODE 6560-50-P


