*1127 OPINION OF THE COURT
INTRODUCTION
On July 10, 1981 Kulp Foundry, Inc. was held in civil contempt by the United States District Court for the Middle District of Pennsylvania for its failure to honor an Occupational Safety and Health Administration (“OSHA”) inspection warrant. The district court issued its contempt order after quashing and severing as overbroad that portion of the warrant which authorized the Secretary of Labor to inspect documents at the Kulp plant. The district court held that the quashed part of the warrant provided for inspection power beyond the Secretary’s statutory authority under section 8(a) of the Occupational Safety and Health Act, 29 U.S.C. §§ 651-678 (1976). At No. 81-2450 Kulp appeals from the district court’s order holding it in contempt and from the district court’s denial of its motion to quash the warrant in its entirety. At No. 81-2451 the Secretary of Labor appeals from the district court’s order quashing and severing that part of the warrant authorizing the inspection of documents. We dismiss Kulp’s appeal as moot and affirm the district court’s order holding that the Secretary is without statutory authority to inspect documents pursuant to a section 8(a) search warrant. FACTS
On April 16, 1980 the Wilkes-Barre OSHA Area Office received a written complaint alleging that employees at Kulp Foundry’s East Stroudsberg plant were exposed to “high levels of dust.” 1 The complaint alleged that the dust problems were the result of a damaged and inoperative vacuum system on the plant floor. Based on its evaluation of the complaint, see 29 C.F.R. § 1903.11 (1981), OSHA decided to perform an inspection of the plant site. On May 20, 1980 an OSHA industrial hygienist visited the plant but Kulp officials refused to permit his entry.
On November 14,1980 OSHA made an ex parte application to United States Magistrate Raymond J. Durkin for an inspection warrant based on the previously received complaint. The application sought inspection authority extending to all foundry operations where silica was present, to health hazards in plain view, and to conditions brought to the inspector’s attention during the course of the inspection. The application requested that the inspection include “all pertinent conditions, structures, machines, apparatus, devices, equipment, materials and all other things therein (including records, files, papers, processes, controls and facilities) bearing on whether this employer is complying with the Occupational Safety and Health standard for exposure to silica.” App. at 15. In addition OSHA requested authorization to employ the attachment of personal samplers to employees and to engage in private questioning of employees at the worksite.
The magistrate determined that probable cause existed and issued the requested warrant. 2 On November 17,18, and 19,1980 an OSHA compliance officer attempted to execute the warrant, but the “inspection was terminated due to the inability to agree on the meaning of the warrant and the terms of the inspection.” App. at 23. 3
PROCEDURAL HISTORY
On April 6, 1981 the Secretary of Labor filed a Petition for Adjudication of Civil Contempt in the Middle District of Pennsylvania alleging that Kulp Foundry was in contempt because of its refusal to allow *1128 execution of the warrant. App. at 36; see 11 C. Wright & A. Miller, Federal Practice and Procedure, Civil § 2960 (1973 & 1981 Supp.). In response Kulp filed a Motion to Quash Warrant, and on April 28, 1981 Judge Conaboy issued a Rule to Show Cause why Kulp’s motion should not be granted. A hearing was convened on May 6, 1981.
On July 10, 1981 Judge Conaboy issued a Memorandum and Order in which he upheld the warrant in all respects except insofar as it authorized the inspection of records. The judge held that under the statute, if OSHA wanted to inspect records, it was required to seek a subpoena rather than a warrant. As to the other portions of the warrant, the court granted the Secretary’s Petition for Adjudication of Civil Contempt and ordered Kulp to purge itself by permitting an inspection in accordance with the court’s order. An inspection was subsequently held, but OSHA issued no citations. 4
Kulp appealed to this court that part of the district court’s order which denied Kulp’s Motion to Quash and which held Kulp in civil contempt for failure to honor the warrant. Kulp claimed that no probable cause or statutory authority existed for the issuance of the warrant. Kulp also argued that the district court erred by not quashing the entire warrant when it determined that part of the warrant was over-broad and thus invalid. The Secretary filed a cross-appeal claiming that the district court erred by quashing and severing as invalid that part of the warrant which authorized the inspection of records.
Prior to briefing before this court, the Secretary moved to dismiss Kulp’s appeal at No. 81-2450. The Secretary argued that because the inspection of Kulp’s workplace had been completed the order of civil contempt was purged. Thus, the Secretary argued, any appeal from that order or the order denying Kulp!s Motion to Quash was moot. The Secretary’s motion was referred to the merits panel for consideration with these appeals.
DISCUSSION
A. MOOTNESS
The Secretary of Labor asks this court to dismiss Kulp’s appeal at No. 81-2450 arguing that no live controversy exists between the parties. He contends that because an inspection has taken place and no citations have been issued, Kulp’s challenges to the district court’s adjudication of civil contempt and refusal to quash the warrant are now moot. The Secretary further contends that Kulp stands to gain nothing if we were to reverse these portions of the district court’s order.
Cf. NRDC v. U.S. EPA,
Under Article III of the Constitution, this court has power to adjudicate issues only when presented with an actual “case or controversy.”
United States Parole Commission v. Geraghty,
This does not end our inquiry, however. Kulp argues that under our previous decisions this ease should not be held moot. This court has previously identified three exceptions to the mootness doctrine which should be considered when deciding the reviewability of an appeal that is in some sense moot:
(1) whether the appellant has expeditiously taken all steps necessary to perfect the appeal and to preserve the status quo before the dispute becomes moot,
(2) whether the trial court’s order will have possible collateral legal consequences, and
(3) whether the dispute is of such a nature that it is capable of repetition yet evading review.
See Marshall
v.
Whittaker Corp.,
First, the initial exception discussed in
Whittaker
derives from
United States v. Frumento,
*1130
Second, no possible collateral legal consequences flow from the district court’s order.
See Pennsylvania v. Mimms,
Third, the claims raised by Kulp are not “capable of repetition, yet evading review.”
See Illinois State Board of Elections v. Socialist Workers Party,
We thus hold that Kulp’s appeal at No. 81-2450 is moot in that it presents no live controversy for adjudication. 12 Kulp’s situation does not fall within the three exceptions to the mootness doctrine previously articulated by this court. We are thus unable to reach Kulp’s claims on the merits.
The Secretary’s appeal at No. 81-2451, however, does provide a live controversy in that he asks this court to overturn the district court’s order quashing and severing the records inspection portion of the warrant and to remand to the district court so that further inspection may take place. We now turn to that issue.
B. INSPECTION OF RECORDS PURSUANT TO A WARRANT.
The district court held that the Secretary lacked statutory authority under section *1131 8(a) of the Act, 29 U.S.C. § 657(a) (1976), to inspect Kulp’s records, files, and papers pursuant to an OSHA inspection warrant. 13 The lower court held that the only statutory authority for the inspection of documents was the Secretary’s administrative subpoena power provided for in section 8(b) of the Act. 29 U.S.C. § 657(b) (1976). Accordingly, the district court quashed and severed that part of the inspection warrant authorizing inspection of documents.
In reaching its conclusion, the district court relied on the analysis in
In re Inland Steel Co.,
The Secretary posits several reasons why this court should not follow the reasoning in Inland Steel. First, he argues that section 8(a)(2) specifically authorizes the inspection of “materials” at the worksite, a term which the Secretary construes to include “notes, observations, [and] data.” Second, he argues that under section 8(c)(1) an employer is required to “make available to the Secretary” those records that the Secretary requires him to keep under the Act and thus Congress could not have intended that those records could be obtained only by subpoena. Third, he argues that the Inland Steel reasoning is flawed because it “rests on the maxim expressio unius est exclusio alterius,” the application of which is inappropriate to a statute in which broad rule-making authority has been conferred by Congress. 16
*1132 Our reading of the statutory provisions, the legislative history, and the various policies behind the Act convinces us that Congress did not intend to allow the Secretary to inspect records pursuant to a warrant issued under section 8(a). 17 Congress clearly distinguished inspections of an employer’s physical plant from the examination of récords and documents. See H.R. Rep.No.91-1291, 91st Cong., 2d Sess. 22 (1970). Congress provided an express method by which the Secretary can properly effectuate his responsibilities under the Act while not compromising employers’ rights to be free from excessive intrusion by the government. In addition, the language of sections 8(a) and 8(b) compels the conclusion that Congress intended them to be read together as a comprehensive inspection scheme. Section 8(a) allows the Secretary “upon presenting appropriate credentials ... to enter without delay any factory . . . and to inspect and investigate . . . any such place of employment.” Section 8(b) begins, “[i]n making his inspections and investigations under this chapter the Secretary may require the attendance and testimony of witnesses and the production of evidence under oath.” We read the language of section 8(b) as granting to the Secretary a power adjunct to his section 8(a) power to inspect and investigate; to read section 8(a) as incorporating the power to obtain documents, as the Secretary would have us do, would render this adjunct power superfluous. We conclude rather that Congress intended the safeguards of a subpoena requirement to apply to the production of documents.
The Secretary also argues that the section 8(a) warrant requirement provides a sufficient safeguard against arbitrary intrusions into company records. But under the statute as Congress passed it, the Secretary was not required to obtain a warrant to inspect under section 8(a); the warrant requirement was a judicial imposition,
see Marshall v. Barlow’s, Inc.,
We therefore hold that the district court was correct in quashing that part of the warrant which authorized the Secretary of Labor to inspect Kulp’s records and files in *1133 conjunction with a physical inspection of Kulp’s plant. 19
CONCLUSION
Because we find Kulp’s appeal at No. 81-2450 to be moot, we will vacate that part of the district court’s order and remand to the district court with instructions to dismiss. We will affirm that part of the district court’s order in No. 81-2451 holding that records cannot be inspected pursuant to a section 8(a) search warrant.
Notes
. The complaint did not specify what “dust” was, but indicated that it was a powder “much like flour” used in the process of making molds. In its warrant application, OSHA argued that the “dust” referred to in the complaint was silica dust, a type found in grey iron foundries such as Kulp’s East Stroudsberg facility.
. The warrant was issued pursuant to § 8(a) of the Act, 29 U.S.C. § 657(a) (1976).
. According to the inspection officer’s affidavit, submitted to the district court with the Secretary’s Certification of Facts under 28 U.S.C. § 636 (1976 & Supp. IV 1980), the company refused to permit employee interviews on its premises and would not allow inspection of company records regarding employee exposure to silica.
. The Secretary apparently determined that citations for violation of recordkeeping requirements were time barred. Because of Kulp’s employees’ refusal to wear personal sampling pumps, the Secretary was unable to determine Kulp’s compliance with the silica standard, thereby preventing the issuance of timely citations on that basis as well.
. The Supreme Court has also recognized the policy elements of the mootness doctrine.
Franks v. Bowman Transportation Co.,
. In the instant case, any possible future citations resulting from the challenged inspection are now time barred. 29 U.S.C. § 658(c) (1976).
. To contain a live issue, a case must involve “a real and substantial controversy admitting of specific relief through a decree of a conclusive character, as distinguished from an opinion advising what the law would be upon a hypothetical state of facts.”
Preiser v. Newkirk,
For the same reason that this appeal does not present a live issue, Kulp no longer has a legally cognizable interest in the result of the case.
See Murphy v. Hunt,
. In
Whittaker
the court concluded that appellant had not satisfied the
Frumento
exception because it had not taken steps expeditiously to preserve its appeal. The court, however, did not discuss the issue of whether
Frumento
actually applied.
. Kulp argues that because it entered into a “non-waiver agreement with the Secretary” before allowing an inspection to purge its civil contempt it took all the necessary steps “to preserve the status quo.” See App. at 11. It is clear the parties are unable to enter into an agreement which gives this court subject matter jurisdiction. Furthermore we hold that the agreement entered into by Kulp and the Secretary is insufficient to fit this case within the Frumento exception.
. This case is distinguishable from
Marshall v. Whittaker,
where the existence of outstanding citations made Whittaker’s appeal of the district court’s denial of its motion to quash not constitutionally moot.
. It is possible that issues raised'by Kulp in its appeal of the district court’s order denying its Motion to Quash, e.g. the existence of probable cause, are latent issues in the Secretary’s appeal in No. 81-2451. Because of our disposition of that appeal, however, we need not address those issues.
. Kulp cites
Cerro Metal Products v. Marshall,
. That same issue is presented to this court in the appeal of
Donovan v. Metal Bank of America, Inc.,
. The only authority cited by the Secretary in support of his claim that he has the statutory authority under § 8(a) to inspect documents is a Magistrate’s Report and Recommendation in Donovan v. Wollaston Alloys, Inc., No. 81-2143-M (D.Mass. Oct. 7, 1981) (magistrate), motion to quash denied, No. 81-2143-M (D.Mass. Feb. 12, 1982), appeal docketed, No. 82-1219 (1st Cir. 1982).
We have found no other decision which expressly discusses the relationship of §§ 8(a) and 8(b) and the Secretary’s supposed authority generally to inspect documents pursuant to a warrant. Cases involving Labor Department investigations where warrants allowing for the inspection of medical and personnel records have been upheld have focused on whether the scope of the warrant corresponded to the probable cause on which the warrant was issued rather than the specific statutory restrictions on the Secretary’s authority generally to inspect documents. See,
e.g., Marshall v. Chromolloy American Corp.,
.
Inland Steel
involved the Director of the National Institute of Occupational Safety and Health who asserted authority to conduct the underlying inspection under 29 U.S.C. §§ 669, 671 (1976). Those provisions allow the Director to perform all the functions of the Secretary of HEW (now Secretary of Health and Human Services) under § 669. Section 669(b) gives the Secretary of HHS the same authority to make inspections as is given to the Secretary of Labor under § 657.
. The Secretary makes two other contentions. He argues that he has promulgated regulations which allow him, during an inspection, to review records required to be kept by law as well as other records directly related to the inspection’s purpose. 29 C.F.R. § 1903.3(a) (1981). While this court gives “considerable weight” to the interpretation of a statute by the administrative agency charged with its implementation, such deference “should not be used ... as a shield for permitting agencies to extend their statutory authority beyond that delegated to them by Congress.”
Dow Chemical,
605 F.2d
*1132
at 680-81; see
Marshall v. North American Car Co.,
The Secretary also argues that the Supreme Court implicitly decided the issue presented here in
Marshall v. Barlow’s, Inc.,
. Congress may not have explicitly compared the inspection of records pursuant to a warrant and the inspection of records pursuant to a subpoena because, under the Act as passed, Congress did not expressly require that a warrant be obtained for any type of inspection under § 8(a).
Marshall v. Barlow’s, Inc.,
. While we do not decide the question of whether or not a subpoena is necessary to reach records that an employer is required to “make available” under § 8(c) of the Act, we note that the requirements of an administrative subpoena are (1) the inquiry must be within the authority of the agency, (2) the demand for production must not be too indefinite, and (3) the information sought must be reasonably relevant to the authorized inquiry.
United States v. Westinghouse Elec. Corp.,
. Kulp argues that the district court erred in not quashing the entire warrant as invalid when it determined that part of it was over-broad. In light of our disposition of Kulp’s appeal in No. 81-2450 as moot, we need not address that issue.
Cf. United States v. Christine,
