OPINION OF THE COURT

POLLAK, District Judge.

St. George Warehouse, Inc. ("St. George"), a company that warehouses shipping containers, petitions for review of an order of the National Labor Relations Board ("NLRB" and "Board") finding that it violated section 8(a)(5) and 8(a)(1) of the NLRA, 29 U.S.C. § 158(a)(1) and (5), by unilaterally transferring unit work to temporary agency employees, who are not union members. To remedy these violations, the Board ordered St. George to restore the ratio of direct hires to temporary agency employees to the status quo that existed just prior to the union election. St. George contests the Board's order, arguing that the union's complaint was time-barred, that the hiring practices complained of were consistent with the NLRA, and that the restoration remedy is "repugnant" to the purposes and policies undergirding the NLRA. The Board has cross-petitioned, seeking enforcement of its order. For the reasons which follow, we will deny the petition for review and enforce the order of the Board.

I.

St. George is a corporation with an office and place of business in South Kearny, New Jersey, that warehouses containers from ships. On March 8, 1999, Local 641 of the International Brotherhood of Teamsters ("IBT") petitioned the NLRB for a representation election of St. George's warehouse employees. According to Local 641, the unit was to include "[a]ll full-time and regular part-time warehouse employees employed by [St. George] at its South Kearny, New Jersey facility, but excluding all temporary agency employees, office clerical employees, professional employees, guards and supervisors as defined in the Act." J.A. at 11 (emphasis added).

On April 14, 1999, a secret ballot election was held at St. George. The union won the election and, on October 27, 2000, the union was certified. On December 19, 2000, the union requested that St. George meet with it to begin the collective bargaining process. St. George refused, and Local 641 filed an unfair labor practice charge. On April 10, 2001, the Board ruled in favor of the union on summary judgment and, on August 7, 2001, the Third Circuit enforced the Board's order directing St. George to bargain collectively with the union. St. George Warehouse, Inc. v. NLRB, 261 F.3d 493 (3d Cir. 2001).

In 2002, the union filed a second unfair practice charge with the NLRB. That charge alleged that St. George had decided, some time after the union election, to stop making direct hires, and to replace terminated or departed workers exclusively with agency (i.e., non-unit) employees. As a result of this practice, the unit decreased from 42 employees at the time of the election to 8 employees by July 2002, when the union and St. George appeared before an ALJ for a hearing inquiring into St. George's hiring practices. It is undisputed that the decision to replace departing direct hires with temporary agency workers was made unilaterally, without notice to the union or an opportunity for it to bargain.

The ALJ found that St. George had altered the status quo that existed before the union election. More specifically, the ALJ determined that prior to the union's election, which was held in April 1999, St. George did not have a policy or practice of hiring agency warehousemen to replace direct hires who left St. George's employ. The ALJ concluded that St. George's unilateral transfer of unit work to temporary agency employees without giving the union notice and the opportunity to bargain violated section 8(a)(5) and (1) of the NLRA, 29 U.S.C. § 158(a)(5) and (1).

In reviewing the ALJ's decision, the Board agreed with the ALJ's finding that St. George had violated section 8(a)(5) and (1) by unilaterally transferring work to agency employees. The Board disagreed with the ALJ's proposed remedy for the section 8(a)(5) and (1) violations, however. The ALJ had recommended that St. George immediately restore and maintain the ratio of direct hires to agency employees that existed at the time of the union election, which the ALJ found to be 7:1. The Board determined that the 7:1 ratio was not entirely appropriate because, prior to the union election, the total number of agency employees used by St. George fluctuated from week to week, as did the total number of direct hires. The ALJ's 7:1 ratio did not account for this fluctuation. Thus, the Board decided to leave to the compliance stage the determination of the proportion of direct hires and agency employees that St. George must maintain in order for the unit to be properly restored.

St. George has petitioned for review, and the Board has cross-petitioned for enforcement of its order.

II.

Section 10(b) of the NLRA, 29 U.S.C. § 160(b), provides in relevant part that "no complaint shall issue based on any unfair labor practice occurring more than six months prior to the filing of the charge with the Board and the service of a copy thereof upon the person against whom such charge is made." St. George argues that the union was aware of the labor practice of which it complains more than six months before November 26, 2001, when the union filed its charge. In particular, St. George maintains that, as of December 2000, Jan Katz, who was made the union's business agent in April 2001, knew or should have known about St. George's transfer of unit positions to temporary agency employees. St. George thus contends that the union's complaint is time-barred.

St. George presented this argument to both the ALJ and the Board. The ALJ found that Katz, who testified that it was August 2001 when he first learned of the shift in employee composition, was credible. The Board agreed that St. George had not met its burden of establishing that the union had actual or constructive notice of St. George's hiring practices prior to August 2001. St. George nonetheless asks the court to reject Katz's testimony and credit instead the testimony of Tony Daniels, from whose statements St. George infers that Katz would have learned of the unilateral transfers in April 2001.

"The final determination of credibility rests with the Administrative Law Judge as long as he considers all relevant factors and sufficiently explains his resolutions." NLRB v. W.C. McQuaide, Inc., 552 F.2d 519, 526 n. 14 (3d Cir. 1977). Further, "[t]he ALJ's credibility determinations should not be reversed unless inherently incredible or patently unreasonable." Atlantic Limousine, Inc. v. NLRB, 243 F.3d 711, 718-19 (3d Cir. 2001) (quoting NLRB v. Lee Hotel Corp., 13 F.3d 1347 (9th Cir. 1994)). We will not substitute our own credibility finding for the ALJ's, especially where, as the ALJ noted was the case here, a witness's testimony is corroborated by documentary evidence and the testimony of other witnesses. Accordingly, we find no error in the Board's determination that the charge was not time-barred.

III.

Because St. George's practice of supplementing direct hires with temporary agency employees pre-dated the union election, and because the union certification specifically excluded, inter alia, "temporary agency employees," St. George argues that it was free to hire temporary agency employees in whatever numbers it chose without first seeking union approval.

The ALJ found that the decision to replace direct hires with temporary agency employees occurred some time after the union election, but before certification, and that this decision marked a significant change from St. George's preelection hiring practices, according to which it used agency employees only to supplement and augment the workforce consisting of direct hires, and not to replace the direct hires.

"[A]n employer that chooses unilaterally to change its employees' terms and conditions of employment between the time of an election and the time of certification does so at its own peril, if the union is ultimately certified." Overnite Transportation Co., 335 N.L.R.B. 372, 372-373 (2001). The record amply supports the ALJ's findings regarding the timing and significance of St. George's decision to replace direct hires with temporary agency workers. "The findings of the Board with respect to questions of fact if supported by substantial evidence on the record considered as a whole shall be conclusive." 29 U.S.C. § 160(e). Accordingly, we find no reason to disturb the ALJ's conclusion, which the Board adopted, that St. George was required to bargain with the union over the issue of replacing departing or terminated direct hires with agency employees, and that St. George's failure to do so constituted a violation of section 8(a)(5) and (1) of the NLRA.

IV.

St. George contests, on a number of grounds, the portion of the Board's remedy requiring St. George to restore the employee composition existing prior to the union election.

In general, the Board's power to fashion remedies for unfair labor practices is a "broad and discretionary one, subject to limited review." Fibreboard Paper Products Corp. v. NLRB, 379 U.S. 203, 216, 85 S.Ct. 398, 13 L.Ed.2d 233 (1964). Further, the NLRB frequently orders restoration to the status quo ante in cases, like the instant one, where the employer unilaterally alters the conditions of employment. See, e.g., id. at 215, 85 S.Ct. 398; NLRB v. Cauthorne, 691 F.2d 1023, 1025 (D.C. Cir. 1982); Taylor Warehouse Corp. v. NLRB, 98 F.3d 892 (6th Cir. 1996); Southwest Forest Indus. v. NLRB, 841 F.2d 270, 274 (9th Cir. 1988); Duke University and Amalgamated Transit Union, Local 1328, 315 N.L.R.B. 1291 (1995); Land O'Lakes, 299 N.L.R.B. 982 (1990).

St. George nonetheless opposes the restoration remedy. It argues that the Board's remedy would be appropriate only if St. George had terminated some of the direct hires because of their involvement with the union, which would constitute a violation of section 8(a)(3) of the NLRA, and that neither the ALJ nor the Board found that St. George had committed such a violation. The argument is wide of the mark. The restoration remedy need not be limited to section 8(a)(3) violations in order for it to "be adapted to the situation which calls for redress." N.L.R.B. v. Mackay Radio Telegraph Co., 304 U.S. 333, 348, 58 S.Ct. 904, 82 L.Ed. 1381 (1938). The NLRB has in the past ordered similar restoration remedies where no section 8(a)(3) violation was found. See, e.g., Duke University, supra (requiring that employer who was found to have violated section 8(a)(5) and (1), by ceasing to hire full-time drivers who would be union members and instead hiring non-union part-time drivers, restore the unit to what it would have been without the unlawful changes).

St. George next argues that the Board's remedy is improper because it guarantees to the union a specific number of constituents despite the fact that some of the former unit workers departed voluntarily. The argument misconstrues the remedy, however, for the Board's order defers to the compliance stage a determination of the proportion of union to agency employees to be restored. Thus, at the compliance stage, the Board could take ordinary attrition rates into account in setting the target ratio.

St. George argues further that the remedy gives the union control over the agency hires without the benefit of an election. The argument presumes that, to effectuate the Board's remedy, St. George would have to confer direct hire status upon the temporary agency employees currently on its workforce. Yet, while the ALJ suggested this option as one way in which St. George could restore the status quo, neither the ALJ nor the Board mandated this route. Moreover, even if St. George did elect this route, "[t]here is . . . nothing permanent in a bargaining order, and if, after the effects of the employer's acts have worn off, the employees clearly desire to disavow the union, they can do so by filing a representation petition." NLRB v. Gissel Packing Co., 395 U.S. 575, 613, 89 S.Ct. 1918, 23 L.Ed.2d 547 (1969).

In its reply brief, St. George alleges that only a minority of the currently employed direct hires continue to support the union. Yet the record before us neither supports nor controverts this contention, and so we intimate no view on the question of whether changed circumstances have undermined the propriety of the Board's restoration remedy.

Finally, St. George argues that the relevant date for purposes of ascertaining the status quo ante should not be April 1999 because, according to St. George, "the Board cannot go back more than six months from the date of filing the charge." St. George appears to glean this supposed limitation from its readings of 29 U.S.C. § 160(b), and NLRB v. Katz, 369 U.S. 736, 746 n. 13, 82 S.Ct. 1107, 8 L.Ed.2d 230 (1962). In fact, § 160(b) states that "no complaint shall issue based upon any unfair labor practice occurring more than six months prior to the filing of the charge with the Board and the service of a copy thereof upon the person against whom such charge is made. . . ." (emphasis added). Similarly, the time bar at issue in Katz pertained to the date of the filing of the charge relative to the date of the allegedly unlawful conduct; Katz did not deal with the issue of how far back the Board may look in fixing the status quo ante. In short, neither Katz nor § 160(b) precludes remedies that seek to address or restore conditions that existed more than six months prior to the filing of an NLRB complaint, and no such restriction exists elsewhere, see, e.g., Duke University, 315 N.L.R.B. at 1291-92 (ordering a restoration to the status quo existing prior to the August 1991 union election in a case for which the charge was filed on August 10, 1993, and amended on September 23, 1993).

In short, St. George's objections to the status quo remedy are unpersuasive. That remedy addresses the violations St. George committed, and is appropriately tailored to redress the resultant harms. Accordingly, we will not disturb the Board's remedial order.

V.

For the foregoing reasons we will deny the Petition for Review of the Order of the National Labor Relations Board and grant the Cross-Application for Enforcement of the Order of the National Labor Relations Board.