MEMORANDUM OPINION

GRANTING IN PART AND DENYING IN PART DEFENDANT'S MOTION FOR SUMMARY JUDGMENT; DENYING PLAINTIFF'S CROSS-MOTION FOR SUMMARY JUDGMENT

RUDOLPH CONTRERAS, United States District Judge.

I. INTRODUCTION

Plaintiff Public Employees for Environmental Responsibility ("PEER") is a non-profit organization "dedicated to research and public education concerning the activities and operations of federal, state and local governments." Compl. ¶ 4, ECF No. 2. In this Freedom of Information Act ("FOIA") lawsuit, PEER seeks to compel the Environmental Protection Agency ("EPA") to release records related to EPA's involvement with the "suspected or actual toxic contamination at schools in the Santa Monica Malibu Unified School District" ("SMMUSD"). Id. ¶ 5. Specifically, PEER objects to EPA's decision to withhold or redact certain records pursuant to certain FOIA exemptions.

Before the Court are EPA's Motion for Summary Judgment (ECF. No. 18) and PEER's Cross-Motion for Summary Judgment (ECF No. 20). The motions are ripe and fully briefed.1 Upon consideration of the parties' submissions and the entire record, and for reasons explained below, the Court will grant in part and deny in part EPA's motion for summary judgment and deny PEER's cross-motion for summary judgment.

II. BACKGROUND

On August 19, 2014, PEER submitted a request for records to EPA Region 9, pursuant to FOIA, 5 U.S.C. § 552. See Def.'s Statement of Material Facts ("EPA Statement") ¶ 1, ECF No. 18-1; Pl.'s Statement of Material Facts ("PEER Statement") ¶ 1, ECF No. 20. Specifically, PEER requested:

EPA Statement ¶ 1; PEER Statement ¶ 1. PEER also sought a fee waiver, which was granted by EPA. See Decl. of Steven Armann ("Armann Decl.") ¶ 16, ECF No. 18-3; PEER Statement ¶ 2. On December 5, 2014, PEER brought this suit, alleging that EPA had failed to provide any records, as required by FOIA. See Compl. ¶¶ 1, 7. Soon after the Complaint was filed, EPA responded to PEER's request by releasing a group of responsive documents on December 22, 2014, but withholding others pursuant to Exemptions 5 and 6 of FOIA. See Armann Decl. ¶ 17; EPA Statement ¶ 4; PEER Statement ¶ 4. Subsequent discussions between PEER and EPA led to the release of additional documents — some produced in full, and others partially redacted. See Armann Decl. ¶¶ 19-21; EPA Statement ¶¶ 5-7; PEER Statement ¶ 5. This Court ordered EPA to produce a Vaughn index providing information on redacted and fully withheld records. See Min. Order, Apr. 28, 2015. The Vaughn indices submitted with EPA's motion for summary judgment described 451 documents withheld in part and another set of documents withheld in full.2 See Armann Decl. ¶ 22; EPA Statement ¶ 8; PEER Statement ¶ 6. During the briefing of these motions, EPA filed amended Vaughn indices that corrected certain errors identified by the parties and reflected EPA's decision to release certain records that were not properly withheld. See Notice of Filing Am. Vaughn Indices, ECF No. 26; see also Pl.'s Mem. Supp. Cross-Mot. Summ. J. ("PEER Mem.") at 22-23, ECF No. 20 (arguing that withheld records were not intra- or inter-agency materials); Second Decl. of Steven Armann ("2d Armann Decl.") ¶ 7, ECF No. 24-1 (releasing challenged documents). Now before the Court are cross-motions for summary judgment filed by each of the parties. See generally Def.'s Mot. Summ. J. ("EPA Mot."), ECF No. 18; Pl.'s Cross-Mot. Summ. J., ECF No. 20.

III. LEGAL STANDARD

A. Summary Judgment

"FOIA cases typically and appropriately are decided on motions for summary judgment." Defenders of Wildlife v. U.S. Border Patrol, 623 F.Supp.2d 83, 87 (D.D.C. 2009) (citing Bigwood v. U.S. Agency for Int'l Dev., 484 F.Supp.2d 68, 73 (D.D.C. 2007)). Summary judgment is appropriate where "the movant shows that there is no genuine dispute as to any material fact and the movant is entitled to judgment as a matter of law." Fed. R. Civ. P. 56(a). A "material" fact is one capable of affecting the substantive outcome of the litigation. See Anderson v. Liberty Lobby, Inc., 477 U.S. 242, 248, 106 S.Ct. 2505, 91 L.Ed.2d 202 (1986). A dispute is "genuine" if there is enough evidence for a reasonable jury to return a verdict for the non-movant. See Scott v. Harris, 550 U.S. 372, 380, 127 S.Ct. 1769, 167 L.Ed.2d 686 (2007).

The principal purpose of summary judgment is to streamline litigation by disposing of factually unsupported claims or defenses and determining whether there is a genuine need for trial. See Celotex Corp. v. Catrett, 477 U.S. 317, 323-24, 106 S.Ct. 2548, 91 L.Ed.2d 265 (1986). The movant bears the initial burden of identifying portions of the record that demonstrate the absence of any genuine issue of material fact. See Fed. R. Civ. P. 56(c)(1); Celotex, 477 U.S. at 323, 106 S.Ct. 2548. In response, the non-movant must point to specific facts in the record that reveal a genuine issue that is suitable for trial. See Celotex, 477 U.S. at 324, 106 S.Ct. 2548. In considering a motion for summary judgment, a court must "eschew making credibility determinations or weighing the evidence," Czekalski v. Peters, 475 F.3d 360, 363 (D.C. Cir. 2007), and all underlying facts and inferences must be analyzed in the light most favorable to the non-movant, see Anderson, 477 U.S. at 255, 106 S.Ct. 2505. Nevertheless, conclusory assertions offered without any evidentiary support do not establish a genuine issue for trial. See Greene v. Dalton, 164 F.3d 671, 675 (D.C. Cir. 1999).

B. Freedom of Information Act

FOIA was enacted so that citizens could discover "what their government is up to." U.S. Dep't of Justice v. Reporters Comm. for Freedom of the Press, 489 U.S. 749, 773, 109 S.Ct. 1468, 103 L.Ed.2d 774 (1989) (quoting EPA v. Mink, 410 U.S. 73, 105, 93 S.Ct. 827, 35 L.Ed.2d 119 (1973)). "[D]isclosure, not secrecy, is the dominant objective of [FOIA]." U.S. Dep't of the Air Force v. Rose, 425 U.S. 352, 361, 96 S.Ct. 1592, 48 L.Ed.2d 11 (1976). "Consistent with this purpose, agencies may withhold only those documents or portions thereof that fall under one of nine delineated statutory exemptions." Elliott v. U.S. Dep't of Agric., 596 F.3d 842, 845 (D.C. Cir. 2010) (citing 5 U.S.C. § 552(b)). "[T]he exemptions are `explicitly exclusive.'" U.S. Dep't of Justice v. Tax Analysts, 492 U.S. 136, 151, 109 S.Ct. 2841, 106 L.Ed.2d 112 (1989) (quoting FAA Adm'r v. Robertson, 422 U.S. 255, 262, 95 S.Ct. 2140, 45 L.Ed.2d 164 (1975)). And it is the agency's burden to show that withheld material falls within one of these exemptions. See 5 U.S.C. § 552(a)(4)(B); Elliott, 596 F.3d at 845.

When assessing a summary judgment motion in a FOIA case, a court makes a de novo assessment of whether the agency has properly withheld the requested documents. See 5 U.S.C. § 552(a)(4)(B); Judicial Watch v. U.S. Dep't of Homeland Sec., 598 F.Supp.2d 93, 95 (D.D.C. 2009). To prevail on a motion for summary judgment, "the defending agency must prove that each document that falls within the class requested either has been produced, is unidentifiable or is wholly exempt from the Act's inspection requirements." Weisberg v. U.S. Dep't of Justice, 627 F.2d 365, 368 (D.C. Cir. 1980) (internal quotation marks omitted) (quoting Nat'l Cable Television Ass'n v. FCC, 479 F.2d 183, 186 (D.C. Cir. 1973)).

To meet its burden, a defendant may rely on declarations that are reasonably detailed and non-conclusory. See Citizens for Ethics & Responsibility in Wash. v. U.S. Dep't of Labor, 478 F.Supp.2d 77, 80 (D.D.C. 2007) (quoting Military Audit Project v. Casey, 656 F.2d 724, 738 (D.C. Cir. 1981)). The agency's justification is typically contained in a declaration or affidavit, referred to as a "Vaughn index" after the case Vaughn v. Rosen, 484 F.2d 820 (D.C. Cir. 1973). An agency's affidavits or declarations are presumed to be submitted in good faith. See SafeCard Servs., Inc. v. SEC, 926 F.2d 1197, 1200 (D.C. Cir. 1991). The purpose of a Vaughn index is "to permit adequate adversary testing of the agency's claimed right to an exemption," Nat'l Treasury Emps. Union v. U.S. Customs Serv., 802 F.2d 525, 527 (D.C. Cir. 1986) (citing Mead Data Cent., Inc. v. U.S. Dep't of Air Force, 566 F.2d 242, 251 (D.C. Cir. 1977)), and therefore the index must contain "an adequate description of the records" and "a plain statement of the exemptions relied upon to withhold each record," id. at 527 n.9.

"Ultimately, an agency's justification for invoking a FOIA exemption is sufficient if it appears `logical' or `plausible.'" Wolf v. CIA, 473 F.3d 370, 374-75 (D.C. Cir. 2007) (quoting Gardels v. CIA, 689 F.2d 1100, 1105 (D.C. Cir. 1982)). Generally, a reviewing court should "respect the expertise of an agency" and not "overstep the proper limits of the judicial role in FOIA review." Hayden v. Nat'l Sec. Agency/Cent. Sec. Serv., 608 F.2d 1381, 1388 (D.C. Cir. 1979). Nonetheless, "exemptions from disclosure must be narrowly construed... and conclusory and generalized allegations of exemptions are unacceptable." Morley v. CIA, 508 F.3d 1108, 1114-15 (D.C. Cir. 2007) (citation and internal quotation marks omitted).

IV. ANALYSIS

As EPA correctly notes, PEER has made no objection to the sufficiency of EPA's search for responsive documents. See Def.'s Mem. P. & A. in Supp. Reply ("EPA Reply") at 2 n.1, ECF No. 24; see also Def.'s Mem. P. & A. Supp. Mot. Summ. J. ("EPA Mem.") at 5-7, ECF No. 18 (arguing that EPA's search was adequate). Similarly, EPA has not disputed PEER's assertion that it constructively exhausted its administrative remedies, as required by FOIA. See Compl. ¶ 8; see generally EPA Mot. (failing to raise issue of exhaustion); EPA Mem. (same). The only issue before the Court is whether EPA's decision to withhold certain documents, in whole or in part, was appropriate.

Specifically, EPA has withheld documents pursuant to FOIA Exemptions 5 and 6, and PEER argues that EPA has failed to meet its burden of proof that information has been properly withheld under those provisions. Because of inadequacies with EPA's Vaughn indices, the Court will deny EPA's motion for summary judgment with regard to the deliberative process privilege. The Court will grant EPA's motion for summary judgment for certain withholdings pursuant to the attorney-client privilege, but deny the motion for documents, including all communications that do not appear to include an attorney. Finally, the Court will grant summary judgment for EPA on the single remaining Exemption 6 withholding.

A. Exemption 5

EPA has withheld the vast majority of the records at issue in this case pursuant to FOIA Exemption 5. Exemption 5 permits the withholding of "inter-agency or intra-agency memorandums or letters that would not be available by law to a party other than an agency in litigation with the agency." 5 U.S.C. § 552(b)(5). This exemption protects documents "normally privileged in the civil discovery context," Judicial Watch, Inc. v. U.S. Dep't of Justice, 365 F.3d 1108, 1113 (D.C. Cir. 2004), such as materials shielded by the attorney-client privilege, the attorney work-product privilege and "what is sometimes called the `deliberative process' privilege," U.S. Dep't of the Interior v. Klamath Water Users Protective Ass'n, 532 U.S. 1, 8, 121 S.Ct. 1060, 149 L.Ed.2d 87 (2001). In other words, Exemption 5 covers "those documents, and only those documents, normally privileged in the civil discovery context." Loving v. U.S. Dep't of Defense, 550 F.3d 32, 37 (D.C. Cir. 2008) (citations omitted). The two Exemption 5 privileges at issue in this case are the deliberative process privilege and the attorney-client privilege.

1. Threshold Issue

As a threshold issue, Exemption 5 only covers records that are "inter-agency or intra-agency memorandums or letters." 5 U.S.C. § 552(b)(5). In other words, the Supreme Court has stated that, for Exemption 5 to apply to a document, the "source [of the withheld document] must be a government agency." Klamath Water Users, 532 U.S. at 8, 121 S.Ct. 1060. PEER identified four withheld records — PRD 634, 926, 956, and 15833 — that it argued are not covered by Exemption 5 because they involve communications with outside consultants to SMMUSD. See PEER Mem. at 22-23. In response, EPA acknowledged PEER's argument and stated that the agency "re-examined [the] four documents," determined that they were "mistakenly redacted based on the belief that they were communications with EPA consultants," and decided to release them in full. See EPA Reply at 3 n.2; see also 2d Armann Decl. ¶ 7 (describing the release of the four documents that were mistakenly redacted). PEER has not asserted that any other documents fail to pass over the Exemption 5 threshold. In light of the parties' resolution of the threshold issue, there is no genuine dispute that the remaining documents withheld pursuant to Exemption 5 are intra- or inter-agency records for the purposes of Section 552(b)(5). Thus, the Court can turn to the question of whether EPA properly withheld materials under the deliberative process and attorney-client privileges incorporated by Exemption 5.

2. Deliberative Process

EPA relies on the deliberative process privilege to justify the vast majority of its withholdings, but PEER makes several arguments challenging that reliance. Because the Court finds that EPA's Vaughn indices are inadequate, it cannot reach the question of whether the material has been properly withheld under the deliberative process privilege. Instead, the Court will direct EPA to revise its Vaughn indices, taking into account the issues addressed here.

The deliberative process privilege "covers `documents reflecting advisory opinions, recommendations, and deliberations comprising part of a process by which governmental decisions and policies are formulated.'" Klamath Water Users, 532 U.S. at 8, 121 S.Ct. 1060 (quoting NLRB v. Sears, Roebuck & Co., 421 U.S. 132, 150, 95 S.Ct. 1504, 44 L.Ed.2d 29 (1975)). The privilege is intended "to enhance the quality of agency decisions by protecting open and frank discussion among those who make them within the Government." Id. at 9, 121 S.Ct. 1060 (internal citation and quotation marks omitted). The privilege "rests on the obvious realization that officials will not communicate candidly among themselves if each remark is a potential item of discovery and front page news." Id. at 8-9, 121 S.Ct. 1060; see also Dow Jones & Co. v. U.S. Dep't of Justice, 917 F.2d 571, 573-74 (D.C. Cir. 1990).

For the deliberative process privilege to apply, a court must first determine whether the exempt document is both predecisional and deliberative. Access Reports v. U.S. Dep't of Justice, 926 F.2d 1192, 1194 (D.C. Cir. 1991). "A document is predecisional if it is generated `before the adoption of an agency policy.'" McKinley v. FDIC, 744 F.Supp.2d 128, 138 (D.D.C. 2010) (quoting Coastal States Gas Corp. v. U.S. Dep't of Energy, 617 F.2d 854, 866 (D.C. Cir. 1980)). "A document is deliberative if it `reflects the give-and-take of the consultative process,'" id. (quoting Coastal States, 617 F.2d at 866), "by which the decision itself is made," Jowett, Inc. v. U.S. Dep't of the Navy, 729 F.Supp. 871, 875 (D.D.C. 1989) (quoting Vaughn v. Rosen, 523 F.2d 1136, 1144 (D.C. Cir. 1975)). The "key question" in determining whether the material is deliberative in nature "is whether disclosure of the information would `discourage candid discussion within the agency.'" Access Reports, 926 F.2d at 1195 (quoting Dudman Commc'ns Corp. v. U.S. Dep't of Air Force, 815 F.2d 1565, 1567-68 (D.C. Cir. 1987)).

"The need to describe each withheld document when Exemption 5 is at issue is particularly acute because `the deliberative process privilege is so dependent upon the individual document and the role it plays in the administrative process.'" Animal Legal Def. Fund, Inc. v. U.S. Dep't of Air Force, 44 F.Supp.2d 295, 299 (D.D.C. 1999) (quoting Coastal States, 617 F.2d at 867). Under the deliberative process privilege, "unlike other exemptions where the agency declaration and Vaughn index may be read in conjunction to provide an adequate justification for application of an exemption to a class or category of records, to sustain its burden of showing that records were properly withheld under Exemption 5, an agency must provide in its declaration and Vaughn index precisely tailored explanations for each withheld record at issue." Nat'l Sec. Counselors v. CIA, 960 F.Supp.2d 101, 188 (D.D.C. 2013). "The agency must establish `what deliberative process is involved, and the role played by the documents in issue in the course of that process.'" Senate of P.R. v. U.S. Dep't of Justice, 823 F.2d 574, 585-86 (D.C. Cir. 1987) (quoting Coastal States, 617 F.2d at 868). "In addition to explaining the `function and significance of the document(s) in the agency's decisionmaking process,' the agency must describe `the nature of the decisionmaking authority vested in the office or person issuing the disputed document(s), and the positions in the chain of command of the parties to the documents.'" Elec. Frontier Found. v. U.S. Dep't of Justice, 826 F.Supp.2d 157, 168 (D.D.C. 2011) (quoting Arthur Andersen & Co. v. IRS, 679 F.2d 254, 258 (D.C. Cir. 1982)).

a. Adequacy of the Vaughn Indices

PEER argues that (1) EPA's declaration and Vaughn indices are inadequate because they do not identify specific deliberative decisions or decisionmaking processes, (2) EPA's declaration and Vaughn indices are inadequate because they fail to identify the nature of the author's decisionmaking authority or the relative positions in the chain of command of the author and recipients, (3) the Vaughn indices are inadequate because they provide only meaningless boilerplate descriptions of the claimed harm of disclosure, (4) EPA has failed to justify its withholding of draft documents, (5) EPA has withheld factual or technical material that is not deliberative, (6) EPA has withheld material that is post-decisional, and (7) many entries in the Vaughn indices do not correspond with the redacted documents. See PEER Mem. at 7-24. EPA responds that PEER's arguments "are based upon inaccurate, ill-informed, or legally incorrect conclusions." EPA Reply at 3. EPA argues that withheld documents do not need to be limited to a particular decision or policy, that duplicative justifications may be appropriate so long as factually distinct descriptions are provided, and that EPA has appropriately withheld deliberations related to factual and technical material. See id. at 3-15.

PEER's primary argument — that EPA's Vaughn indices are inadequate because they fail to tie withheld material to an agency decision or decisionmaking process — alone succeeds in defeating summary judgment for EPA with respect to the deliberative process privilege. See PEER Mem. at 7. Several of PEER's other arguments also stem from this basic idea. Id. at 17 ("A lot of the problem with EPA's claims about harm stems from the fact that it has not identified particular actions or decisions or decision-making processes...."). EPA counters that it has, "where possible, identified the final agency decision associated with the document; but where this is not possible, an agency must merely establish `what deliberative process is involved, and the role played by the documents at issue in the courts of that process.'" EPA Reply at 9 (citing Coastal States, 617 F.2d at 866).

EPA's statement of the law is correct. The Supreme Court has explained that "the need to protect pre-decisional documents does not mean that the existence of the privilege turns on the ability of an agency to identify a specific decision in connection with which a memorandum is prepared." NLRB v. Sears, Roebuck & Co., 421 U.S. 132, 151 n.18, 95 S.Ct. 1504, 44 L.Ed.2d 29 (1975). The Court recognized that some deliberate processes would not ripen into agency decisions, and did not want to interfere with that process. See id. Instead, an agency may establish what deliberative process is involved, and the role that the withheld documents played in that process. See Formaldehyde Inst. v. U.S. Dep't of Health & Human Servs., 889 F.2d 1118, 1123 (D.C. Cir. 1989).

The problem with EPA's argument is not its understanding of the law, but the application of the law to this case. EPA states that each entry in its Vaughn indices "clearly states the function of each document, the decision at issue, and the ability of the author or the author's authority to make the decision." EPA Reply at 10. As an example, EPA quotes language that appears in nearly every entry in the Vaughn indices:

Id.

As stated above, the requirement that an agency describe all withheld material "when Exemption 5 is at issue is particularly acute because `the deliberative process privilege is so dependent upon the individual document and the role it plays in the administrative process.'" Animal Legal Def. Fund, 44 F.Supp.2d at 299 (quoting Coastal States, 617 F.2d at 867). At the very least, EPA is required to provide the following information for each document at issue: "(1) the nature of the specific deliberative process involved, (2) the function and significance of the document in that process, and (3) the nature of the decisionmaking authority vested in the document's author and recipient." Nat'l Sec. Counselors v. CIA, 960 F.Supp.2d 101, 189 (D.D.C. 2013) (citing Senate of P.R., 823 F.2d at 585-86; Arthur Andersen, 679 F.2d at 257-58; Coastal States, 617 F.2d at 867-68). EPA's Vaughn indices, including the language quoted above, fail to meet that burden for each of the three requirements identified above.

First, the agency is required to adequately describe the nature of the deliberative process involved and the function and significance of the document in that process. See Taxation with Representation Fund v. IRS, 646 F.2d 666, 678 (D.C. Cir. 1981) (requiring an agency to show the "function and significance of the documents in the agency's decisionmaking process"); Coastal States, 617 F.2d at 868 ("[T]he agency has the burden of establishing what deliberative process is involved...."). Although EPA is correct that it is not required to identify a specific agency decision, see Sears, 421 U.S. at 151 n.18, 95 S.Ct. 1504, it is required to show that the document was "generated as part of a definable decision-making process." Gold Anti-Trust Action Comm., Inc. v. Bd. of Governors of the Fed. Reserve Sys., 762 F.Supp.2d 123, 135-36 (D.D.C. 2011) (emphasis added) (citing Petroleum Info. Corp. v. U.S. Dep't of the Interior, 976 F.2d 1429, 1434 (D.C. Cir. 1992)). EPA has failed to meet this burden with regard to a number of the documents it has withheld. PRD 954 provides a useful example. See Am. Vaughn Index, vol. 2, at 13, ECF No. 26-2.4 The full rationale for withholding material in the document states:

Id. at 13-14.

EPA has helpfully provided separate descriptions and privilege claims for each document withheld in full or in part, but necessary information is missing from this extended explanation. Crucially, it is not clear from this description "what deliberative process is involved." Coastal States, 617 F.2d at 868. Does EPA believe the deliberative process is "EPA's response to the emerging issue?" Am. Vaughn Index, vol. 2, at 14. Or "deliberating on the best Agency-wide approach for coordinating its response?" Id. Or, discussions "prior to its actions regarding the school?" Id. The answer is not clear. Nor is it clear that any one of these descriptions is sufficiently "definable" to allow the Court to determine whether the communications at issue were predecisional. See Gold Anti-Trust Action Comm., 762 F.Supp.2d at 135-36. Furthermore, the repeated language suggests that the withheld communications were considered "prior to [EPA's] actions regarding the school," but does not specify what those actions were or who authorized them. See Am. Vaughn Index, vol. 2, at 14. That context would help the Court to understand the decisions and decisionmaking processes at issue here.

The explanation provided by EPA's declarant is no more helpful. Mr. Armann explains that the withheld materials "pertain to myriad EPA decision-making processes." Armann Decl. ¶ 23. In fact, the three "categories" of withheld information he describes are just that — broad subject matter categories — not decisionmaking processes related to agency action. Id. (describing communications discussing the handing of PCB issues generally in schools, communications discussing the specific handling of PCB issues related to the SMMUSD, and emails discussing responses to stakeholders interested or involved in issues related to the Malibu schools). Although EPA is not required to link each document to a specific action, it must do more to tie the materials to some definable process. See Nat'l Sec. Counselors, 960 F.Supp.2d at 189 ("The individual entries in the CIA's Vaughn index, however, do not elaborate on the `specific deliberative process to which the withheld [document] contributed.'") (quoting Elec. Frontier Found., 826 F.Supp.2d at 168); Trea Senior Citizens League v. U.S. Dep't of State, 923 F.Supp.2d 55, 68 (D.D.C. 2013) ("Such a broad and opaque description of the deliberative process involved does not provide the Court with enough detail about whether these documents are deliberative and predecisional."); cf. Judicial Watch, Inc. v. U.S. Postal Serv., 297 F.Supp.2d 252, 264 (D.D.C. 2004) ("It is not enough to say that the documents relate, in some way, to `actions taken or proposed in response to the discovery of anthrax in the mail,' for if they did not, the documents would not be before the court at all." (citations omitted)). Armed only with these vague descriptions of the deliberative process involved, the Court does not have sufficient detail to determine whether the material withheld in many of the documents at issue is both deliberative and predecisional. See Trea Senior Citizens League, 923 F.Supp.2d at 68.

Second, for many documents withheld by EPA, the Vaughn indices fail to describe with any amount of detail the "function and significance of the document(s) in the agency's decisionmaking process." Arthur Andersen, 679 F.2d at 258 (quoting Taxation with Representation, 646 F.2d at 678). This context is necessary for the Court to evaluate whether material is predecisional, because "if documents are not a part of a clear `process' leading to a final decision on the issue, ... they are less likely to be properly characterized as predecisional." Coastal States, 617 F.2d at 868. The withholding rationale for PRD 954, quoted in full above, is illustrative on this point as well. See Am. Vaughn Index, vol. 2, at 13-14. The closest the entry comes to explaining the function and significance of the document is to state that the "record reflects analysis, recommendations, and opinions that were considered as part of the Agency's decision making process." Id. This language appears to be repeated for every entry in the Vaughn indices. A general statement of this sort is not sufficient to carry the agency's burden to explain the function and significance of a document in the agency's decisionmaking process. See Taxation with Representation, 646 F.2d at 678.

Finally, for many of the documents at issue here, EPA's Vaughn indices and supporting declarations, taken as a whole, do not adequately describe the "nature of the decisionmaking authority vested in the office or person issuing the disputed document(s), and the positions in the chain of command of the parties to the documents." Arthur Andersen, 679 F.2d at 258 (internal quotation marks and citation omitted). The D.C. Circuit has instructed that the "identity of the parties to the memorandum is important" to evaluating the withholding of material pursuant to the deliberative process privilege, because the relative position of the author and recipient aids the court in determining whether a document is predecisional. Coastal States, 617 F.2d at 868. EPA's Vaughn indices do generally reveal the author and recipient of each document, but it appears that every entry simply repeats the boilerplate statement that "the author does not have decision-making authority with respect to providing the final response related to PCBs." See, e.g., Am. Vaughn Index, vol. 1, at 1 (PRD 209), ECF No. 26-1; id. at 1-2 (PRD 211); id. at 3 (PRD 221); see also PEER Mem. at 15; EPA Reply at 10. This vague, repeated statement fails to describe the "relative positions in the agency's `chain of command' occupied by the document's author and recipient." Senate of P.R., 823 F.2d at 586 (quoting Arthur Andersen, 679 F.2d at 258).

Conclusory statements that every author does not have decisionmaking authority — without providing additional context, identifying the authority of the recipient, or tying the record to a particular decisonmaking process — do not give the Court enough information to determine whether the deliberative process privilege applies. The repeated assertion, which raises the question of who at EPA Region 9 does have decision-making authority, is further undermined by the Vaughn index entries related to EPA Region 9 Regional Administrator, Jared Blumenfeld. PEER points to the multiple emails that Mr. Blumenfeld sent to subordinates, and the corresponding Vaughn indices contain the same conclusory statement that the "author does not have decision-making authority with respect to providing the final response related to PCBs." See e.g., Am. Vaughn Index, vol. 1, at 22-23 (PRD 421); id. at 47-48 (PRD 1861); id. (PRD 1871); Am. Vaughn Index, vol. 2, at 55 (PRD 1884); see also PEER Mem. at 16. Surprisingly, EPA has not responded to this point. Presumably, as head of EPA Region 9, Mr. Blumenfeld had some decision-making authority, but the Vaughn indices indicate otherwise. In fact, some of the decisions at issue in this case were made under Mr. Blumenfeld's signature. See, e.g., Armann Decl. ¶ 12 (describing EPA's October 31, 2014 "formal approval to the District covering certain clean-up activities"); PEER Mem. at 16 (noting that Mr. Blumenfeld signed the October 31, 2014 letter). Without more information regarding the "the nature of the decisionmaking authority vested in the document's author and recipient," the Court is unable to determine whether the deliberative process privilege applies to the withheld documents. Nat'l Sec. Counselors v. CIA, 960 F.Supp.2d 101, 189 (D.D.C. 2013) (citations omitted).

Because of the inadequacy of the documentation provided by EPA in support of its deliberative process privilege withholdings, the Court concludes "`not that the documents are not exempt as a matter of law, but that the agency has failed to supply' in its Vaughn submissions `the minimal information necessary to make a determination' concerning applicability of the deliberative process privilege." Elec. Frontier Found., 826 F.Supp.2d at 173 (quoting Coastal States, 617 F.2d at 861).5 Therefore, the Court will deny summary judgment to EPA on the issue of its withholding determinations pursuant to the deliberative process privilege.

b. Supplemental Vaughn Indices

The Court has several options for how to proceed now that it has found EPA's current Vaughn indices are insufficient for many of the documents withheld in full or in part. Federal courts have the authority to order agencies to produce any records that have been withheld improperly. See 5 U.S.C. § 552(a)(4)(B); see also Vaughn v. Rosen, 484 F.2d 820, 824 (D.C. Cir. 1973) ("If the factual nature of the documents were so clearly established on the record, then the court would inquire no further and would make the legal ruling as to whether they fit within the defined exemption or exemptions."). If a court finds that an "agency fails to provide a sufficiently detailed explanation to enable the district court to make a de novo determination of the agency's claims of exemption, the district court then has several options, including inspecting the documents in camera, requesting further affidavits, or allowing the plaintiff discovery." See Spirko v. U.S. Postal Serv., 147 F.3d 992, 997 (D.C. Cir. 1998). The D.C. Circuit has also explained that "a district court should not undertake in camera review of withheld documents as a substitute for requiring an agency's explanation of its claimed exemptions." Id. Therefore, the Court finds that the best approach is to direct the agency to revise its Vaughn submissions, addressing the issues noted by the Court.

It may very well be the case that many of the redacted documents are covered by the deliberative process privilege. Indeed, prior decisions have determined that the privilege protects from disclosure documents resembling some of the materials at issue here. See, e.g., Access Reports v. Dep't of Justice, 926 F.2d 1192, 1196-97 (D.C. Cir. 1991) (protecting memorandum written to prepare senior agency officials for Congressional testimony); Competitive Enter. Inst. v. EPA, 12 F.Supp.3d 100, 120 (D.D.C. 2014) (protecting internal agency communications discussing "how to communicate with members of Congress ... and how to prepare for potential points of debate or discussion [in upcoming congressional testimony]" (citation omitted)); Judicial Watch, Inc. v. U.S. Dep't of Homeland Sec., 880 F.Supp.2d 105, 111-12 (D.D.C. 2012) (protecting email exchanges discussing draft responses to press inquiries); Exxon Corp. v. U.S. Dep't of Energy, 585 F.Supp. 690, 698 (D.D.C. 1983) (protecting documents marked as "draft"). But EPA must do more to show that the withholdings are proper.

PEER argues that EPA fails to demonstrate the harm that each disclosure would cause and "merely repeats the same boilerplate language" for each withholding, PEER Mem. at 17, instead of providing a "specific and detailed proof" of harm, id. (quoting Mead Data Cent., Inc. v. U.S. Dep't of Air Force, 566 F.2d 242, 258 (D.C. Cir. 1977)). Going forward, however, EPA is not prohibited from relying on repetitive language, as long as the agency describes the nature of the deliberative process involved and the function and significance of the withheld material in that process. See Judicial Watch, Inc. v. FDA, 449 F.3d 141, 147 (D.C. Cir. 2006) (explaining that "categorization and repetition provide efficient vehicles by which a court can review withholdings" and that "particularity may actually impede court review and undermine the functions served by a Vaughn index"). PEER connects its objection to EPA's articulation of the harm of disclosure to the agency's failure to identify "particular actions or decisions or decision-making processes, which makes it impossible to identify the harm that would stem from revealing the deliberations leading to them." PEER Mem. at 17. Thus, to the extent EPA's supplemental submissions do show "(1) the nature of the specific deliberative process involved, (2) the function and significance of the document in that process, and (3) the nature of the decisionmaking authority vested in the document's author and recipient," Nat'l Sec. Counselors, 960 F.Supp.2d at 189 (citations omitted), repetitive language that logically connects disclosure with the threat of harm may constitute the necessary "specific and detailed proof" of harm. Mead Data, 566 F.2d at 258. Presumably, clarifying the nature of the deliberative process at issue in each document will also allow EPA to address PEER's argument that EPA has withheld post-decisional documents. See PEER Mem. at 21-23; see also Judicial Watch, Inc. v. U.S. Postal Serv., 297 F.Supp.2d 252, 260 (D.D.C. 2004) ("The most basic requirement of the privilege is that a document be antecedent to the adoption of an agency policy.").

Although the inadequacy of EPA's current Vaughn indices prevents the Court from evaluating the particular documents, the Court briefly addresses the parties' disagreement over technical data. See PEER Mem. at 18-21; EPA Reply 14-15. Generally, severable and purely factual material should be disclosed. See Wolfe v. Dep't of Health & Human Servs., 839 F.2d 768, 774 (D.C. Cir. 1988) (en banc). However, factual information must also be examined "in light of the polices and goals that underlie the deliberative process privilege" and the "context in which the documents were used." Id. at 775; see also Nat'l Wildlife Fed'n v. U.S. Forest Serv., 861 F.2d 1114, 1119 (9th Cir. 1988) (avoiding a "semantics debate" and focusing on "the ultimate objective of exemption 5" to protect the deliberative process). Thus, to the extent EPA establishes that the privilege applies to its withholdings, the privilege may also extend to factual matter which is used by the agency to develop policy. See, e.g., Reliant Energy Power Generation, Inc. v. Fed. Energy Regulatory Comm'n, 520 F.Supp.2d 194, 206 (D.D.C. 2007); Brannum v. Dominguez, 377 F.Supp.2d 75, 83 (D.D.C. 2005). But the agency must specify how the release of the purely technical data, in this particular context, would cause the type of harm the deliberative process is designed to avoid.

Finally, EPA is reminded that the D.C. Circuit has stated that, "FOIA litigants are entitled to assume that the agency's Vaughn index is accurate in every detail" and that "[t]here is no excuse for submitting a Vaughn index that contains errors, even minor ones." Schiller v. NLRB, 964 F.2d 1205, 1209 (D.C. Cir. 1992), abrogated on other grounds, Milner v. Dep't of Navy, 562 U.S. 562, 131 S.Ct. 1259, 179 L.Ed.2d 268 (2011).6

Some of EPA's current Vaughn index entries do a better job of meeting the agency's burden. For example, the rationale for withholding PRD 1986 reads, in relevant part:

Am. Vaughn Index, vol. 2, at 81-82 (emphases added). This description does a far better job of identifying a specific decisionmaking process (deciding how to respond to a request from a particular individual) and what role the communication at issue played in that process (circulating a draft response for review and comment).7 Id.

At this time, the Court does not dictate the format of EPA's supplemental Vaughn indices. However, if EPA provides supplemental declarations or Vaughn indices, they must show, at the least: "(1) the nature of the specific deliberative process involved, (2) the function and significance of the document in that process, and (3) the nature of the decisionmaking authority vested in the document's author and recipient." Nat'l Sec. Counselors v. CIA, 960 F.Supp.2d 101, 189 (D.D.C. 2013) (citing Senate of P.R., 823 F.2d at 585-86; Arthur Andersen, 679 F.2d at 257-58; Coastal States, 617 F.2d at 867-68).

3. Attorney-Client Privilege

EPA has withheld material in a much smaller collection of documents pursuant to the attorney-client privilege. PEER challenges all of EPA's withholdings under this privilege as well. To the extent EPA seeks summary judgment related to communications that do not appear to include an attorney, the motion will be denied. Next the Court turns to a smaller subset of documents that include an attorney in some portion of the communication. Upon consideration of EPA's Vaughn indices, Mr. Armann's declaration, and the redacted documents presented by PEER, the Court will grant summary judgment to EPA with regard to four of the documents, but deny EPA's motion with regard to the remainder.

Exemption 5 extends to documents protected by the attorney-client privilege, meaning agencies are not required to disclose privileged material. "The attorney-client privilege protects confidential communications from clients to their attorneys made for the purpose of securing legal advice or services," as well as "communications from attorneys to their clients if the communications rest on confidential information obtained from the client." Tax Analysts v. IRS, 117 F.3d 607, 618 (D.C. Cir. 1997) (quotation marks and citations omitted). "In the governmental context, the `client' may be the agency and the attorney may be an agency lawyer." Id. Where an agency lawyer serves in a mixed capacity that involves responsibilities both within and "outside the lawyer's sphere," the agency employee's communications will only be protected to the extent that they involve his or her professional, legal capacity. In re Sealed Case, 737 F.2d 94, 99 (D.C. Cir. 1984). The government bears the burden of proving, through "detailed and specific information," that the withheld information falls within the attorney-client privilege. See Campbell v. U.S. Dep't of Justice, 164 F.3d 20, 30 (D.C. Cir. 1998). For the government to succeed on a motion for summary judgment, it must marshal its supporting documentation to prove:

Judicial Watch, Inc. v. U.S. Dep't of Homeland Sec., 841 F.Supp.2d 142, 153-54 (D.D.C. 2012) (citing In re Sealed Case, 737 F.2d at 98-99). Furthermore, a "fundamental prerequisite to the assertion of the privilege" is "confidentiality both at the time of the communication and maintained since." Coastal States, 617 F.2d at 863.

EPA has withheld 17 records pursuant to the attorney-client privilege. See EPA Statement ¶ 16-17; Armann Decl. ¶¶ 30-31; PEER Statement ¶ 6. In its motion for summary judgment, EPA argued that each of the redacted portions "contained communications between an EPA attorney and a client office relating to a legal matter, for which the client office sought legal advice, as well as facts divulged by the client in order to obtain legal counsel." EPA Mem. at 16. EPA relies on its declarant, Steven Armann, to support this statement. Id. Mr. Armann declares that the 17 redacted documents "contain email conversations with [Office of Regional Counsel] and [Office of General Counsel] attorneys concerning issues related to the handling of PCBs at the Malibu schools." Armann Decl. ¶ 30. Mr. Armann describes two records — PRD 834 and 838 — in greater detail, but does not provide any additional specific description of the other 15 records. Id. ¶ 31. PEER challenges the withholding of all 17 records, pointing to deficiencies in EPA's Vaughn indices and arguing that "the justifications for withholding generally do not meet the requirements of Exemption 5." PEER Mem. at 25. PEER identifies and addresses each of the 17 documents that it believes EPA is withholding pursuant to the attorney-client privilege. Id. at 25-28.8

a. Withheld Records that Do Not Include an Attorney on the Communication

The Court will first turn to records withheld pursuant to the attorney-client privilege that do not appear to include an attorney on the communication. PEER has identified 11 email communications withheld under the attorney-client privilege that it argues do not include any attorney: PRD 595, 597, 1037, 1340, 1346, 1473, 1443,9 1645, 1936, 1948, and 1986. Id. Following review of the redacted documents and their respective entries in the Vaughn indices, the Court finds that one of the records — PRD 1645 — does, in fact, appear to at least copy an attorney on the last email in the chain. See PEER Mot. Ex. 103, ECF No. 20-102. The Court agrees, however, that the remaining ten records do not include an attorney. PRD 595 provides a particularly clear example. The relevant entry in the Vaughn index refers to "legal advice provided by an attorney, Ivan Lieben, to his EPA program clients," see Am. Vaughn Index, vol. 1, at 34, but the redacted email chain itself contains no reference to Mr. Lieben, including in any of the "To:" or "From:" fields. See PEER Mot. Ex. 100, ECF No. 20-99. Following the Court's review of the ten emails in this category, none appear to include an attorney as either the author or recipient of the communication.

It goes without saying that the attorney-client privilege only covers "confidential communications between an attorney and his client." Mead Data Cent., Inc. v. U.S. Dep't of Air Force, 566 F.2d 242, 260 (D.C. Cir. 1977) (emphasis added). The government bears the burden to prove that the "person to whom the communication is made is a member of the bar or his subordinate and, in connection with the communication at issue, is acting in his or her capacity as a lawyer." Judicial Watch, Inc. v. U.S. Dep't of Homeland Sec., 841 F.Supp.2d 142, 154 (D.D.C. 2012) (citing In re Sealed Case, 737 F.2d at 98-99).

Here, EPA relies only on a brief paragraph found in Mr. Armann's Declaration that refers to the 17 records, but identifies and describes only two. See Armann Decl. ¶¶ 30-31. The entries in the Vaughn indices appear to be incorrect (as in the case of PRD 595). PEER has provided the redacted records, which appear to show that no attorney was included on these documents. See PEER Mem. at 25-28. In light of this evidence, EPA has failed to carry its burden to show that the withheld communications were made to a member of the bar, acting in his or her capacity as a lawyer. See Judicial Watch, Inc., 841 F.Supp.2d at 154. For this reason, the Court will deny EPA's motion for summary judgment to the extent that it seeks a ruling that information has been appropriately withheld from PRD 595, 597, 1037, 1340, 1346, 1473, 1443, 1936, 1948, and 1986 on the basis of the attorney client privilege.

Where the agency's description of the records fails to establish the elements of the claimed privilege, "the district court has the discretion to order disclosure or to afford the agency an additional opportunity to fully discharge its burden." Id. at 155. Given the apparent problems with the Vaughn indices and the fact that it is not entirely clear that the parties are discussing the same documents, the Court believes affording EPA another opportunity is the most appropriate outcome. Accordingly, the Court will exercise its discretion to permit EPA a further and final opportunity to establish the applicability of the attorney-client privilege to these ten records.

b. Withheld Records that Include an Attorney on the Communication

The remaining seven records withheld by EPA pursuant to the attorney-client privilege appear to include an attorney as either an author or recipient of at least one link in the email chain: PRD 538, 834, 838, 935, 1438,10 1575, and 1645. PEER objects to these withholdings on several grounds. The Court will first address the documents that EPA has failed to show are protected by the attorney-client privilege, before turning to the four documents that EPA has shown are privileged.

The Court first considers PRD 834 and 838, the only documents explicitly addressed in Mr. Armann's declaration. See Armann Decl. ¶ 31. PEER argues that "the actual withheld documents only contain communications from EPA staff, not from attorneys" and that, although Mr. Lieben is on the distribution list, "there is no response from him, providing legal advice or otherwise." PEER Mem. at 25. EPA's Vaughn index states that PRD 834 and 838, which are part of the same chain of emails, include language that "pertains to legal advice provided by an attorney, Ivan Lieben, to his EPA program clients about how to proceed in regard to questions related to EPA's position concerning the activities at the school." See Vaughn Index at 216-217, ECF No. 18-2.11 Mr. Armann's declaration, however, seems to state a different rationale for the withholding. Mr. Armann declares that the "[l]anguage redacted from [PRD 834 and 838] contains legal advice provided by an ORC [Office of Regional Counsel] attorney to his EPA clients."12 See Armann Decl. ¶ 31. The redacted language, however, appears in an email drafted and sent by Mr. Armann, not an attorney. See id.; see also PEER Mot. Ex. 98, ECF No. 20-97; PEER Mot. Ex. 99, ECF No. 20-98. In other words, the rationale for withholding the language seems to be that it encompasses previously provided legal advice even though it was drafted by a non-lawyer, not that Mr. Armann was providing information for the purposes of seeking legal counsel. If that is EPA's argument, the agency has put forth no authority in support of its position. The Court also notes that each of the document's redactions are designated as deliberative process privilege withholdings, further obscuring EPA's rationale. In light of the confusion created by EPA's filings, the Court finds that the agency has not met its burden to show that these two documents are privileged at this time. See Judicial Watch, Inc., 841 F.Supp.2d at 153-54 (citing In re Sealed Case, 737 F.2d at 98-99) (setting forth the standard for the application of the attorney-client privilege).

Next the Court turns to PRD 1645. PEER argues that EPA withheld this document under the attorney-client privilege despite the fact that no attorney is included on the communication. PEER Mem. at 26. In fact, the last email in the chain appears to at least copy Mr. Lieben. Nevertheless, the Court finds that EPA has failed to show that this document was properly withheld. EPA's Vaughn index again states that the "redacted language pertains to legal advice provided by an attorney, Ivan Lieben, to his EPA program clients." Vaughn Index at 122-123. The document includes a series of emails, many of which are redacted in whole or in part. Crucially, however, only one of the redactions is designed as withheld under the attorney-client privilege, and all others designations refer to the deliberative process privilege. See PEER Mot. Ex. 103, ECF No. 20-102. The single redaction made under the attorney-client privilege is found in an email that was sent before Mr. Lieben was included in the communication. See id. Thus, based on the record before the Court, it seems impossible that the language in question was communicated to Mr. Lieben for the purpose of seeking legal counsel. See Judicial Watch, Inc., 841 F.Supp.2d at 153-54. Although the Court will deny EPA's motion for summary judgment with regard to these documents, for the reasons previously explained, see supra Part IV.A.3.a, the Court will exercise its discretion to permit EPA a further and final opportunity to establish the applicability of the attorney-client privilege to PRD 834, 838, and 1645.

The Court is convinced, however, that EPA properly withheld the remaining four documents — PRD 538, 935, 1438, and 1575 — and thus grants summary judgment for EPA on that issue. PEER makes a range of arguments in opposition to these withholdings.

For instance, PEER objects to the withholding of PRD 538 because "the email chain contains only an email from Steve Armann, a program person, to Mr. Lieben," an attorney. PEER Mem. at 26. PEER's argument is misplaced. The application of the attorney-client privilege does not turn on a formalistic rule requiring the attorney to respond to a client with legal advice in the same series of communication. The privilege protects "confidential communications between an attorney and his client relating to a legal matter for which the client has sought professional advice," Mead Data, 566 F.2d at 252, based on the rationale that lawyers can only provide effective advocacy and advice when they are "fully informed by the client." Upjohn Co. v. United States, 449 U.S. 383, 389, 101 S.Ct. 677, 66 L.Ed.2d 584 (1981). Although PEER seems to object to the withholding of email chains where an attorney is only a recipient, it has provided no authority to support that position. While it is clear that the privilege may also protect an attorney's communication to a client, the privilege "principally applies to facts divulged by a client to his attorney." Elec. Privacy Info. Ctr. v. U.S. Dep't of Homeland Sec., 384 F.Supp.2d 100, 114 (D.D.C. 2005). PEER appears to acknowledge this point when it argues that:

Peer Mem. at 24-25 (citations omitted).

In fact, EPA has provided evidence, by declaration and in its Vaughn index, that these withholdings meet those requirements. The Vaughn indices contain an entry for each of the remaining four documents that briefly describes the contents of the record, and states that "redacted language pertains to legal advice provided by an attorney." See, e.g., Am. Vaughn Index, vol. 1, at 34-35 (stating, with regard to PRD 538, that the "redacted language pertains to legal advice provided by an attorney, Ivan Lieben, to his EPA program clients about how to proceed in regard to a request for information and documents from a member of the public...."). EPA's declarant has also stated that the "redacted material in these records was kept confidential and not transmitted to third parties." Armann Decl. ¶ 31. The D.C. Circuit has held that confidentiality should be inferred between an attorney and a client when the communications suggest that "the government is dealing with its attorneys as would any private party seeking advice to protect personal interests." Coastal States Gas Corp. v. U.S. Dep't of Energy, 617 F.2d 854, 863 (D.C. Cir. 1980). That is the case here. Thus, upon consideration of EPA's Vaughn indices, Mr. Armann's declaration, and the redacted documents presented by PEER, the Court finds that EPA has shown that the attorney-client privilege applies to each of the four documents described here. PEER also argues that certain records — specifically PRD 935 and 1575 — include neutral, objective analyses of agency regulations and thus are not protected by the attorney-client privilege. See PEER Mem. at 27. It is true that the D.C. Circuit has stated that "neutral, objective analyses of agency regulations" are not protected by the privilege. Coastal States, 617 F.2d at 863. Subsequent decisions from the D.C. Circuit have emphasized, however, that the reason for that rule is to ensure the openness of an otherwise hidden body of "private law," where a government counsel "rendering [a] legal opinion in effect is making law." Tax Analysts v. IRS, 117 F.3d 607, 619 (D.C. Cir. 1997) (interpreting Coastal States). In other words, it "is this [law-making] quality, not the objective character of the legal analyses in the documents" that is significant. Id. After considering these issues, the court concluded that it would be inappropriate for Exemption 5 and the attorney-client privilege to "be used to protect this growing body of agency law from disclosure to the public." Id.

That is simply not the case here. The two documents at issue contain "explanations of certain Agency policies" (PRD 1575), and concern "legal interpretation of EPA regulations" (PRD 935), but they are not "law-making" or authoritative, nor do they contribute to a body of "secret law." The facts being provided, and the legal advice sought, appear to relate to internal decisionmaking regarding PCB cleanup at Malibu (PRD 935) and general policies with regard to PCBs in schools (PRD 1575), not an authoritative statement of "working law." See Elec. Frontier Found. v. U.S. Dep't of Justice, 739 F.3d 1, 10 (D.C. Cir. 2014) ("The OLC Opinion does not provide an authoritative statement of the FBI's policy. It merely examines policy options available to the FBI. Therefore, the OLC Opinion is not the `working law' of the FBI.").

Thus, the Court finds that EPA has met its burden of establishing the essential elements of the attorney-client privilege for these four documents. See In re Sealed Case, 737 F.2d at 98-99. Accordingly, the Court grants summary judgment with respect to EPA's withholding of PRD 538, 935, 1438, and 1575 based on Exemption 5 and the attorney-client privilege.

B. Segregable Factual Material

The next issue that the Court must address is segregability. FOIA requires that "[a]ny reasonably segregable portion of a record ... be provided to any person requesting such record after deletion of the portions which are exempt." 5 U.S.C. § 552(b). Under FOIA, "non-exempt portions of a document must be disclosed unless they are inextricably intertwined with exempt portions." Mead Data Cent., Inc. v. U.S. Dep't of Air Force, 566 F.2d 242, 260 (D.C. Cir. 1977). An agency is not, however, required to segregate non-exempt material if "the excision of exempt information would impose significant costs on the agency and produce an edited document with little informational value." Neufeld v. IRS, 646 F.2d 661, 666 (D.C. Cir. 1981), overruled on other grounds by Church of Scientology of California v. IRS, 792 F.2d 153 (D.C. Cir. 1986). The agency is "entitled to a presumption that [it] complied with the obligation to disclose reasonably segregable material," Hodge v. FBI, 703 F.3d 575, 582 (D.C. Cir. 2013), but that does not excuse the agency from carrying its evidentiary burden to fully explain its decisions on segregability. See Army Times Pub. Co. v. U.S. Dep't of Air Force, 998 F.2d 1067, 1068 (D.C. Cir. 1993).

The adequacy of an agency's Vaughn index is a crucial factor when a district Court undertakes a segregability analysis. See, e.g., Loving v. U.S. Dep't of Defense, 550 F.3d 32, 41 (D.C. Cir. 2008) (stating that "the description of the document set forth in the Vaughn index and the agency's declaration that it released all segregable material" are "sufficient for [the segregability] determination"); Johnson v. Exec. Office for U.S. Attorneys, 310 F.3d 771, 776 (D.C. Cir. 2002) (upholding agency's segregation efforts based on "comprehensive Vaughn index" and "the affidavits of [agency officials]"). Here, EPA argues that it is impossible to further segregate and release purely factual material from withheld documents without disclosing deliberative communications. See EPA Mem. at 16; Armann Decl. ¶ 32; EPA Reply at 18. However, in light of the problems with EPA's Vaughn index identified above, the Court concludes that, at this time, EPA's segregability efforts do not meet the standard articulated in Loving and Johnson.

C. Exemption 6

Under Exemption 6, an agency may withhold "personnel and medical files and similar files" when the disclosure of such information "would constitute a clearly unwarranted invasion of personal privacy." 5 U.S.C. § 552(b)(6). The Supreme Court has interpreted the term "similar files" broadly so as "to cover detailed Government records on an individual which can be identified as applying to that individual." U.S. Dep't of State v. Wash. Post Co., 456 U.S. 595, 602, 102 S.Ct. 1957, 72 L.Ed.2d 358 (1982) (internal quotation mark omitted) (quoting H.R. Rep. No. 1497, at 11 (1966)). Therefore, not only does the exemption protect files, "but also bits of personal information, such as names and addresses, the release of which would `create a palpable threat to privacy.'" Prison Legal News v. Samuels, 787 F.3d 1142, 1147 (D.C. Cir. 2015) (brackets and internal quotation mark omitted) (quoting Judicial Watch, Inc. v. FDA, 449 F.3d 141, 152 (D.C. Cir. 2006)). "The information in the file `need not be intimate' for the file to satisfy the standard, and the threshold for determining whether information applies to a particular individual is minimal." Milton v. U.S. Dep't of Justice, 783 F.Supp.2d 55, 58 (D.D.C. 2011) (quoting N.Y. Times Co. v. Nat'l Aeronautics & Space Admin., 920 F.2d 1002, 1006 (D.C. Cir. 1990)).

Once this threshold determination is met, a court must next ask whether disclosure would compromise a "substantial" privacy interest, since FOIA requires the release of information "[i]f no significant privacy interest is implicated." Multi Ag Media LLC v. U.S. Dep't of Agric., 515 F.3d 1224, 1229 (D.C. Cir. 2008) (alteration in original) (internal quotation marks omitted) (quoting Nat'l Ass'n of Retired Fed. Emps. v. Horner, 879 F.2d 873, 874 (D.C. Cir. 1989)). This standard, however, "means less than it might seem," as a substantial privacy interest is "anything greater than a de minimis privacy interest." Id. at 1229-30. If a substantial privacy interest exists, a court next tests whether release of such information would constitute a "clearly unwarranted invasion of personal privacy," Wash. Post Co. v. U.S. Dep't of Health & Human Servs., 690 F.2d 252, 260 (D.C. Cir. 1982) (internal quotation marks omitted) (quoting 5 U.S.C. § 552(b)(6)), by balancing "the privacy interest that would be compromised by disclosure against any public interest in the requested information," Multi Ag Media, 515 F.3d at 1228. "[T]he only relevant public interest in the FOIA balancing analysis [is] the extent to which disclosure of the information sought would `she[d] light on an agency's performance of its statutory duties' or otherwise let citizens know `what their government is up to.'" Lepelletier v. FDIC, 164 F.3d 37, 46 (D.C. Cir. 1999) (internal quotation marks omitted) (alterations in original) (quoting U.S. Dep't of Def. v. Fed. Labor Relations Auth., 510 U.S. 487, 497, 114 S.Ct. 1006, 127 L.Ed.2d 325 (1994)). "Information that `reveals little or nothing about an agency's own conduct' does not further the statutory purpose." Beck v. U.S. Dep't of Justice, 997 F.2d 1489, 1493 (D.C. Cir. 1993) (quoting U.S. Dep't of Justice v. Reporters Comm. for Freedom of the Press, 489 U.S. 749, 773, 109 S.Ct. 1468, 103 L.Ed.2d 774 (1989)).

PEER has waived its right to challenge all Exemption 6 withholdings, except for a single document. PEER's only remaining Exemption 6 challenge relates to document PRD 367, which it claims "discuss[es] the activities of Hugh Kaufman, an EPA employee involved with the issues in Malibu." PEER Statement ¶ 7; see also EPA Statement ¶ 19; Armann Decl. ¶ 33; Pl.'s Statement of Disputed Material Facts ¶ 19 ("PEER Statement of Disputed Facts"), ECF No. 20. EPA states that PRD 367 is "an e-mail between two EPA employees [c]oncerning Hugh Kaufman, an EPA employee involved in actions at Malibu." EPA Mem. at 17. According to EPA, the agency "weighed the substantial privacy interest in [PRD 367] against the minimal or non-existent public interest in disclosure," and determined that releasing the record would be an unwarranted invasion of personal privacy. Id. at 18. In support of its argument, EPA relies on Mr. Armann's Declaration, which states that "[r]elease of [PRD 367] would constitute a clearly unwarranted invasion of personal privacy and would not reveal the operations or activities of the Federal government in any meaningful way." Armann Decl. ¶ 33. Similarly, the original Vaughn indices state that "[t]here is no public interest in the individual's personal information or other employees' personal opinion of the employee." Vaughn Index at 94-95.13

PEER agrees with EPA's general characterization of PRD 367 as an email regarding Mr. Kaufman, see PEER Statement ¶ 7, but it "dispute[s] that PRD 367 is properly withheld under Exemption 6." PEER Statement of Disputed Facts ¶ 19. The remainder of PEER's briefing, however, including its motion and all supporting filings, never addresses the Exemption 6 issue again. The Court found no further discussion, argument, or even mention of PRD 367 or Exemption 6. Undeveloped arguments may be deemed waived. Johnson v. Panetta, 953 F.Supp.2d 244, 250 (D.D.C. 2013) ("[I]t is not the obligation of this Court to research and construct the legal arguments available to the parties. To the contrary, perfunctory and undeveloped arguments, and arguments that are unsupported by pertinent authority, are deemed waived." (internal quotation marks and citations omitted)); see also Schneider v. Kissinger, 412 F.3d 190, 200 n.1 (D.C. Cir. 2005) ("It is not enough merely to mention a possible argument in the most skeletal way, leaving the court to do counsel's work.") (quoting United States v. Zannino, 895 F.2d 1, 17 (1st Cir. 1990)). Thus, to the extent PEER seeks summary judgment on the Exemption 6 issue, that portion of the motion is denied.

The Court cannot, however, grant summary judgment in favor of EPA based solely on PEER's failure to respond to EPA's arguments. See Grimes v. District of Columbia, 794 F.3d 83, 95 (D.C. Cir. 2015) (discussing the need for the district court's independent assessment that summary judgment is warranted); see also id. at 97 (Griffith, J., concurring) ("[M]otions for summary judgment may not be conceded for want of opposition.... The burden is always on the movant to demonstrate why summary judgment is warranted. The nonmoving party's failure to oppose summary judgment does not shift that burden."). Instead, the Court must rely on its "independent scrutiny" of the moving party's evidence. Id. at 95. On the question of whether Exemption 6 applies to PRD 367, the Court finds that EPA, relying on the Declaration of Steven Armann and the accompanying Vaughn indices, has borne its initial burden to demonstrate the absence of a genuine issue of material fact. EPA has presented evidence showing that PRD 367 implicates Mr. Kaufman's privacy interest, and that the document reveals nothing of relevance about the agency's actions. See Armann Decl. ¶ 33; Vaughn Index at 94-95. Aside from the unsupported factual conclusion that Exemption 6 does not apply, see PEER Statement of Disputed Facts ¶ 19, PEER has done nothing to designate "specific facts showing that there is a genuine issue for trial." Celotex Corp. v. Catrett, 477 U.S. 317, 323-24, 106 S.Ct. 2548, 91 L.Ed.2d 265 (1986). Therefore, the Court finds there is no genuine issue of material fact and will grant summary judgment for EPA on this issue.

V. CONCLUSION

For the foregoing reasons, EPA's Motion for Summary Judgment (ECF No. 18) is GRANTED IN PART AND DENIED IN PART, and PEER's Cross-Motion for Summary Judgment (ECF No. 20) is DENIED. An order consistent with this Memorandum Opinion is separately and contemporaneously issued.