Opinion for the Court filed by Circuit Judge SPOTTSWOOD W. ROBINSON, III.
Alyeska Pipeline Service Company seeks release under the Freedom of Information
I
Alyeska operates the Trans-Alaska Pipeline System through which unrefined liquid hydrocarbons produced on Alaska’s North Slope are transported to Valdez, Alaska, for loading onto ships. At the Valdez terminal, Alyeska maintains a ballast water treatment (BWT) facility where water is removed from the holds of tankers awaiting loading and is then treated to extract oil, grease, and aromatics before being discharged into Valdez Bay.
Alyeska’s BWT facility is the focus of an ongoing EPA investigation into possible violations of a number of environmental laws. 3 In January, 1985, EPA propounded, pursuant to its statutory authority, interrogatories to Alyeska concerning operation of the facility. In late March, EPA received from Charles Hamel, a private citizen, notice of his intent to commence an action to enforce the terms of Alyeska’s National Pollutant Discharge Elimination System (NPDES) permit. 4 Subsequently, EPA ordered Alyeska to preserve all of its records pertaining to the facility. In July and November, 1985, EPA issued compliance orders enumerating violations at the BWT facility and requiring Alyeska to correct them. 5
In connection with this investigation, Ha-mel turned over to EPA certain of Alyes-ka’s corporate records that had been provided to him by Alyeska employees. In February, 1986, Alyeska requested disclosure, pursuant to FOIA, of the documents obtained from Hamel. EPA located 22 responsive documents, consisting of approximately 177 pages, but withheld them in full. The agency relied on Exemption 7 “because [the request was for] investigatory records compiled for law enforcement purposes the disclosure of which would identify the confidential source of these documents and investigative techniques and procedures.” 6 Alyeska’s administrative appeal was denied. 7
Alyeska filed suit in the District Court in August, 1986. On cross-motions for summary judgment, the court held that EPA’s refusal to produce the documents was justified by FOIA Exemption 7(A) because disclosure would interfere with EPA’s ongoing law enforcement proceeding against Alyeska.
8
The court found that “Alyeska
Alyeska argues on appeal that summary judgment was inappropriate because the parties’ affidavits conflicted in regard to whether disclosure could reasonably be expected to interfere with EPA’s law enforcement proceeding. Alyeska also argues that the District Court did not examine the agency’s exemption claim de novo, as required by FOIA. 14 We reject these contentions and affirm.
II
FOIA’s disclosure requirements do not apply to “records or information compiled for law enforcement purposes ... to the extent that [their] production ... could reasonably be expected to interfere with enforcement proceedings.” 15 The agency has the burden of demonstrating that the exemption applies. 16 Since Alyeska concedes that the documents in question qualify as “records or information compiled for law enforcement purposes,” 17 the remaining question is whether release “could reasonably be expected to interfere with enforcement proceedings.” 18
In support of its motion for summary judgment, EPA submitted the affidavit of John Y. Hohn, Associate Counsel for EPA Region 10, who actively participated in the supervision of EPA’s investigation of Alyeska.
19
According to the affidavit,
To demonstrate that release would likely interfere with law enforcement proceedings, the Hohn affidavit asserted that disclosure would “prematurely reveal[ ] to the subject of this ongoing investigation the size, scope and direction of this investigation.” 24 Hohn reasoned that because Ha-mel provided only “a limited number of selected documents in response to my request for certain documents that evidenced particular types of alleged illegal behavior, the mere identification of the specific records submitted would reveal the scope and direction of the investigation to the requester.” 25 Put in other words, Hohn's point was that because the materials handed over to EPA were selectively chosen, identification of the documents would expose the particular types of allegedly illegal activities being investigated. 26 Hohn therefore concluded that disclosure could “allow for the destruction or alteration of relevant evidence, and the fabrication of fraudulent alibis.” 27
Hohn further averred that revelation of the documents could enable Alyeska to identify the individuals who gave them to Hamel, with the consequence that “these potential witnesses would be less likely to cooperate fully with the EPA.” 28 Hohn reasoned that the employees would feel more vulnerable to potential reprisals than other witnesses, and that Mr. Hamel repeatedly emphasized that the employees who provided the records were “fearful of financial and physical retribution from Alyeska if their identities were discovered.” 29 Hohn also asserted that release at this time would chill future investigations by discouraging witnesses from providing information.
Hitherto we have realized that it is not enough for an agency to shore up its exemption claim merely with general and con-clusory statements regarding the effect of disclosure. 30 In this case, however, the Hohn affidavit does not suffer from such deficiencies, and the justifications it proffers have achieved recognition in Exemption 7 caselaw.
In
NLRB v. Robbins Tire & Rubber Company,
31
an employer charged with unfair labor practices sought, in advance of the administrative hearing on those charges, to obtain copies of statements submitted to NLRB by prospective witness
Our review of EPA’s submissions in this case thus leads us to the conclusion that the agency has met its burden of establishing that Exemption 7(A) is broad enough to intercept the documents in dispute.
Ill
We confront, however, Alyeska’s principal argument on this appeal: that the summary judgment obtained by EPA was inappropriate because conflicts in the parties’ affidavits posed genuine issues of material fact which necessarily precluded a summary disposition by the District Court.
Summary judgment may be rendered only when it is properly shown “that there is no genuine issue as to any material fact and that the moving party is entitled to a judgment as a matter of law.”
35
We have repeatedly emphasized that FOIA cases are not immune to summary judgment requirements.
36
Very recently, in
Washington Post Company v. Department of State,
37
we declared that “when the litigants quarrel over
key factual premises
for a determination [of the probable consequences of releasing particular information], we have unhesitatingly ruled that summary judgment is inappropriate.”
38
Alyeska, however, endeavors to cull from
Washington Post
the proposition that anytime the parties’ affidavits disagree on the probable consequences of a disclosure, summary judgment is barred.
39
This reading is obviously too broad, for it would mean that any motion for summary judgment could readily be defeated by submission of a counteraffidavit that merely draws from a single set of uncontroverted facts a conclusion different from that reached by the agency. If FOIA parties could routinely block summary judgment in this fashion, many unmeritorious FOIA cases could not be disposed of prior to a
In the case at bar, the affidavit submitted by Aleyska did not draw into issue any factual premise essential to the position elucidated in EPA’s affidavit. Rather, upon close examination, the supposed conflicts between the two affidavits turn out to be illusory. They purportedly arise through the affidavit of Ivan Henman, an Alyeska employee in charge of a task force established by the company to respond to EPA’s investigation. 41 Henman asserted that Alyeska knows the scope of the investigation undertaken by EPA, and consequently that release of the sought-after documents would not provide the company with any new insight in this regard. 42 Henman relied upon EPA’s numerous requests for information, its interviews with employees, and two compliance orders issued against Alyeska in an effort to support the contention that “[tjhrough all of this interaction, the general scope of the agency’s investigation has been made clear as have the specific alleged activities which might constitute violations of the Clean Water Act.” 43 It is evident, however, that a party’s purported knowledge of the “general” scope of an investigation is a far cry from specific knowledge of the particular activities being investigated and the direction being pursued. Furthermore, although Alyeska asserts that it is aware of “the specific alleged activities which might constitute violations of the Clean Water Act,” EPA has made plain that its investigation encompasses numerous other environmental statutes as well. 44 Nor is it reasonable to conclude that the compliance orders addressed all aspects of EPA’s investigation. Henman’s affidavit presented no reliable evidence to support this alleged knowledge; in sum, therefore, his assertion that he knows the scope of the investigation is really nothing more than speculation. 45
A second purported conflict alleged by Alyeska concerns the question whether release of the documents would allow identification of the employees who provided the documents, and thereby subject them to the risk of harassment or reprisals, or discourage them from cooperating in the investigation. The Henman affidavit asserted that through newspaper accounts of the EPA investigation he is “familiar with the documents which the reporters either described or named in their articles.”
46
As to those documents, he “knows” that each was handled by at least fourteen Alyeska management personnel as well as other employees, and that it therefore would “be impossible to track down each person who had contact with them and determine if he or she had kept a copy for private use.”
47
Henman did not contend, however, that the press reports revealed the identity of all 22 documents at issue in this case. Thus, his affidavit leaves open the prospect that
Alyeska’s final contention is that the District Court did not consider de novo the agency’s claim of exemption. 48 It bases this argument solely on the court’s comment that “[t]he affidavits of a government agency in FOIA are to be given substantial weight by a reviewing court.” 49 This observation, says Alyeska, is “a clear sign that [the court] failed to exercise the requisite de novo scrutiny to EPA’s affidavit,” 50 and as such mandates reversal. We note that the District Court supported its statement by citation to two FOIA Exemption 1 cases involving issues of national security, where courts accord “substantial weight” to an agency’s affidavit. 51 In this circuit, however, we have not found it appropriate to extend any special deference beyond the Exemption 1 context. 52
Nonetheless, we believe that Alyeska has misassessed the significance of the District Court’s statement. The affidavits of both parties are to be given the weight they are due on the basis of their contents. We have held that EPA’s affidavit discharged its burden and that no genuine issue of material fact was presented. Our conclusion that summary judgment was appropriate thus requires no deference at all to the agency. 53 Additionally, the District Court’s opinion provides adequate evidence that the parties’ submissions were reviewed in their entirety. The judgment of the District Court is accordingly
AFFIRMED.
Notes
. 5 U.S.C. § 552 (1982 & Supp. IV 1986).
. Id. § 552(b)(7)(A). Exemption 7(A) authorizes the withholding of “records or information compiled for law enforcement purposes, but only to the extent that the production of such law enforcement records or information ... could reasonably be expected to interfere with enforcement proceedings."
. We are advised by EPA that subsequent to submission of this case for our decision, one facet of the investigation has been completed, although other aspects remain ongoing. In the absence of any indication that this development should affect our outcome, we dispose of the case on the basis of the written and oral arguments theretofore made.
. Letter from Angus Macbeth, Attorney for Charles Hamel, to Lee M. Thomas (Mar. 27, 1985), Joint Appendix (J. App.) 33-41.
. J. App. 89-102.
. Letter from Ernesta B. Barnes to Maryann Armbrust (Feb. 13, 1986), J. App. 9; see 5 U.S.C. § 552(b)(7)(A) (1982 & Supp. IV 1986).
. Although EPA released Hamel’s one-page letter transmitting the contested documents to EPA, J. App. 31, no other material has been relinquished.
.
Alyeska Pipeline Serv. Co. v. EPA,
Civ. No. 86-2176 (D.D.C. Sept. 9, 1987) (memorandum opinion), J.App. 106 [available on WESTLAW,
. Id. at 6, J.App. 111.
. Id. at 6-7, J.App. 111-112.
. Id. at 7, J.App. 112.
.
Id.
(quoting
NLRB v. Robbins Tire & Rubber Co.,
. The District Court also denied Alyeska’s motion for a
Vaughn
index. See
Vaughn v. Rosen,
. See 5 U.S.C. § 552(a)(4)(B) (1982).
. 5 U.S.C. § 552(b)(7)(A) (1982 & Supp. IV 1986), quoted supra note 2.
.
NLRB v. Robbins Tire & Rubber Co., supra
note 12,
. Alyeska Pipeline Serv. Co. v. EPA, supra note 8, at 3, J.App. 108.
. See
Bevis v. Department of State, supra
note 16,
. Affidavit of John Y. Hohn, attachment to EPA’s Statement of Material Facts,
Alyeska Pipeline Serv. Co. v. EPA, supra
note 8 (filed Dec. 12,
. Id. ¶ 7, J.App. 21.
. Id. ¶ 9, J.App. 21-22.
. Id. ¶9, J.App. 22.
. Id.
. Id. ¶ 13, J.App. 23.
. Id.
. See Willard v. IRS, 776 F.2d 100, 103 (4th Cir.1985) (copies of notes made by IRS agents during interviews properly withheld where "selectivity in recording would certainly provide clues to the appellants of the nature and scope of the investigation”).
. Hohn Affidavit, supra note 19, ¶ 13, J.App. 23.
. Id. ¶ 14, J.App. 24.
. Id.
. See
Campbell v. HHS, supra
note 18,
. Supra note 12.
.
.
Id.
at 239,
.
Id.
at 241,
. Fed.R.Civ.P. 56(c) (“[t]he judgment sought shall be rendered forthwith if the pleadings, depositions, answers to interrogatories, and admissions on file, together with the affidavits, if any, show that there is no genuine issue as to any material fact and that the moving party is entitled to a judgment as a matter of law”).
.
Washington Post Co. v. Department of State,
. Supra note 36.
.
. Brief for Appellant at 15.
. See
Gardels v. CIA,
. Affidavit of Ivan Henman, attachment to Alyeska's Statement of Material Facts, Alyeska Pipeline Serv. Co. v. EPA, supra note 8, (filed Jan. 7, 1987), J.App. 67-70 [hereinafter Henman Affidavit].
. Id. ¶ 5, J.App. 69.
. Id. (emphasis added).
. Hohn Affidavit, supra note 19, ¶ 7, J.App. 21.
. See Fed.R.Civ.P. 56(e) (“Supporting and opposing affidavits shall be made on personal knowledge, shall set forth such facts as would be admissible in evidence, and shall show affirmatively that the affiant is competent to testify to the matters stated therein").
. Henman Affidavit, supra note 41, ¶ 3, J.App. 68.
. Id.
. See 5 U.S.C. § 552(a)(4)(B) (1982) ("the district court ... shall determine the matter de novo ...”).
. Alyeska Pipeline Serv. Co. v. EPA, supra note 8, at 5, J.App. 110.
. Brief for Appellant at 24.
.
Hayden v. National Sec. Agency,
.
Washington Post Co. v. Department of State, supra
note 36,
. Furthermore, the District Court cited
Gardels v. CIA, supra
note 40, for the proposition that “[o]nce satisfied that proper procedures had been followed and that the information logically falls into the exemption claimed, the courts ‘need not go further to test the expertise of the agency, or to question its veracity when nothing appears to raise the issue of good faith.’ ”
