Oakwood Landfill, Inc. (Oakwood) and Hickory Hill Landfill (Hickory Hill) appeal two orders of the South Carolina Board of Health and Environmental Control (the Board) affirming a landfill permit issued to T & T Disposal, LLC (T & T) by the South Carolina Department of Health and Environmental Control (DHEC). We affirm.
FACTS
Sections 44-96-10 to 44-96-470 of the South Carolina Code are known as the South Carolina Solid Waste Policy and Management Act (SWPMA). S.C.Code Ann. §§ 44-96-10 to-470 (2002). Section 44-96-80(A) of the South Carolina Code requires each county in the State to prepare a single county solid waste management plan or participate in a regional solid waste management plan. S.C.Code Ann. § 44-96-80(A) (2002). Jasper County, South Carolina, elected to participate in a regional plan through the Low Country Council of Governments (LCCG), which drafted the Low Country Regional Solid Waste Management Plan (Low Country Plan) in 1994. *125The Low Country Plan was endorsed by Beaufort, Colleton, Hampton, and Jasper Counties. The Plan states that “[b]ased on the amount of disposal capacity available in and around the Lowcountry there is no apparent need to construct new domestic or inert landfill facilities in the next 20 years.” The Plan also provides the “required annual reports due September 1 of each year will represent the extent of progress over a given year and set forth any necessary revisions or amendments.”
The SWPMA also provides “[n]o person shall operate a solid waste management facility without a permit from [DHEC].” S.C.Code Ann. § 44-96-290(A) (2002). Pursuant to SWPMA, on June 80, 2003, T & T filed a permit application with DHEC requesting a Construction and Demolition, and Land-Clearing Debris Landfill Permit (landfill permit) to construct a landfill in Jasper County. DHEC conducted a public hearing for the project on October 27, 2003, and staff notified the public the proposed facility would have an estimated disposal capacity of 1,819,000 cubic yards.
DHEC was required to review the application to determine, among other things, if the proposed facility was consistent with the Low Country Plan.1 The SWPMA does not specify procedures for DHEC to follow in making need and consistency determinations. Jasper County Council notified DHEC it found the proposed T & T landfill to be consistent with the county’s solid waste management plan in letters dated October 29, 1997; May 7, 2000; September 27, 2000; and December 16, 2003.2 DHEC considered the letters to be amendments to Jasper County’s portion of the plan and “penciled in” the changes.3 DHEC also had minutes from the Jasper County *126Council meeting at which the county council voted favorably on the matter. After examining the applicable county requirements, in addition to the above-mentioned documents, DHEC determined T & T would be able to meet the land use requirements after receiving the requested landfill permit. Thus, on January 14, 2004, DHEC issued the landfill permit to T & T and stated in the permit the facility would have a final disposal capacity of approximately 1,819,000 cubic yards.
On January 30, 2004, Oakwood and Hickory Hill requested a contested case hearing, challenging DHEC’s decision to issue the T & T permit. Oakwood and Hickory Hill alleged DHEC’s consistency determination failed to meet the requirements of Section 44-96-290(F) of the South Carolina Solid Waste Policy and Management Act. S.C.Code Ann. § 44-96-290(F) (2002). In the alternative, Oakwood and Hickory Hill argued the permit should be revised to limit the final disposal capacity to 2.2 million cubic feet rather than the 1,819,000 cubic yards approved by DHEC because Jasper County’s Letter of Consistency called for a final disposal capacity of only 2.2 million cubic feet.
On March 15, 2005, the Administrative Law Court (ALC) reversed DHEC’s decision, finding the landfill was inconsistent with the Low Country Plan because the Plan had not been amended to allow for the T & T landfill. Specifically, the ALC determined section 44-96-80(0) of the South Carolina Code required any amendments to the Low Country Plan to be adopted by a multi-party endorsement.4 The ALC did not make any findings on the capacity issue because its ruling on the consistency determination was dispositive.
On April 14, 2005, DHEC and T & T appealed the ALC’s final order to the Board. The Board upheld DHEC’s issuance *127of the permit on March 30, 2006. The Board determined neither section 44-96-80(0) of the South Carolina Code nor the Low Country Plan placed any limitations on a county’s ability to amend the plan as it applied to that particular county. The Board also remanded the matter to the ALC to determine the allowable maximum capacity for the landfill because the ALC had not made any findings on the capacity issue.
On August 28, 2006, the ALC held DHEC had properly set the permit disposal capacity at 1,819,000 cubic yards.5 Oak-wood and Hickory Hill appealed and on July 9, 2007, the Board affirmed the ALC’s August 28, 2006 Order and affirmed DHEC’s decision to set the final disposal capacity at 1,819,000 cubic yards. This appeal follows.
STANDARD OF REVIEW
The ALC presides over all hearings of contested DHEC permitting cases and, in such cases, serves as the fact-finder and is not restricted by the findings of the administrative agency. Dorman v. S.C. Dep’t of Health & Envtl. Control, 350 S.C. 159, 164-65, 565 S.E.2d 119, 122 (Ct.App.2002); S.C.Code Ann. § 1-23-600(A)-(B) (Supp.2007). “An aggrieved party may appeal the ALC’s decision to the agency’s Appellate Panel [ (the Board) ]; however, the Panel’s review is confined to the record and is governed by South Carolina Code section 1-23-610(C).” Terry v. S.C. Dep’t of Health & Envtl. Control, 377 S.C. 569, 573, 660 S.E.2d 291, 293 (Ct.App.2008). “Accordingly, the [Board] can reverse the ALC’s deci*128sion if it determines the ALC’s findings are not supported by substantial evidence contained in the record or are affected by an error of law.” Id. at 573-74, 660 S.E.2d at 293-94; see also Grant v. S.C. Coastal Council, 319 S.C. 348, 353, 461 S.E.2d 388, 391 (1995) (stating the ALC’s findings are supported by substantial evidence if, looking at the record as a whole, there is evidence from which reasonable minds could reach the same conclusion as the ALC).
After an aggrieved party has exhausted all administrative remedies, the party is entitled to judicial review by the South Carolina Court of Appeals. See S.C.Code Ann. § 1-23-380(A) (Supp.2007). Judicial review is confined to the record and is governed by South Carolina Code section 1-23-380(A)(5), which provides:
The court may not substitute its judgment for the judgment of the agency as to the weight of the evidence on questions of fact. The court may affirm the decision of the agency or remand the case for further proceedings. The court may reverse or modify the decision if substantial rights of the appellant have been prejudiced because the administrative findings, inferences, conclusions, or decisions are: (a) in violation of constitutional or statutory provisions; (b) in excess of the statutory authority of the agency; (c) made upon unlawful procedure; (d) affected by other error of law; (e) clearly erroneous in view of the reliable, probative, and substantial evidence on the whole record; or (f) arbitrary or capricious or characterized by abuse of discretion or clearly unwarranted exercise of discretion.
S.C.Code Ann. § 1-23-380(A)(5) (Supp.2007). “Under our standard of review, we may not substitute our judgment for that of the [ALC] as to the weight of the evidence on questions of fact unless the [ALC’s] findings are clearly erroneous in view of the reliable, probative and substantial evidence in the whole record.” Comm’rs of Pub. Works v. S.C. Dep’t of Health & Envtl. Control, 372 S.C. 351, 358, 641 S.E.2d 763, 766-67 (Ct.App.2007). Substantial evidence is not a mere scintilla of evidence, but evidence which, considering the record as a whole, would allow reasonable minds to reach the conclusion the agency reached. Leventis v. S.C. Dep’t of Health & Envtl. Control, 340 S.C. 118, 130, 530 S.E.2d 643, *129650 (Ct.App.2000). “This Court, although not bound by the decision, will ordinarily defer to the opinion of a state agency as to the interpretation of a statute it is charged with the duty of enforcing ” S.C. Coastal Conservation League v. S.C. Dep’t of Health & Envtl. Control, 380 S.C. 349, 363, 669 S.E.2d 899, 906 (2008). “The construction of a statute by the agency charged with its administration will be accorded the most respectful consideration and will not be overruled absent compelling reasons.” Brown v. S.C. Dep’t of Health & Envtl. Control, 348 S.C. 507, 515, 560 S.E.2d 410, 414 (2002) (quoting Dunton v. S.C. Bd. of Examiners in Optometry, 291 S.C. 221, 223, 353 S.E.2d 132, 133 (1987)).
LAW/ANALYSIS
I. Timeliness of Appeal
Respondents argue Appellants failed to timely appeal from the March 30, 2006 Order; therefore, the issues in that order are not preserved for our review. We disagree.
“An appeal to [this] court will not lie from an interlocutory order of the [Board] unless such order affects the merits or deprives the appellant of a substantial right.” Green v. City of Columbia, 311 S.C. 78, 79-80, 427 S.E.2d 685, 687 (Ct.App.1993). “An order involves the merits if it finally determines some substantial matter forming the whole or part of some cause of action or defense in the case.” Id. However, the courts of this state have “consistently held that an order of the circuit court remanding a case for additional proceedings before an administrative agency is not directly appealable.” Montjoy v. Asten-Hill Dryer Fabrics, 316 S.C. 52, 52, 446 S.E.2d 618, 618 (1994); see also S.C. Baptist Hosp. v. S.C. Dep’t of Health & Envt’l. Control, 291 S.C. 267, 270, 353 S.E.2d 277, 279 (1987) (noting an agency decision that does not decide the merits of a contested case, but merely remands to DHEC for further action is not a final agency decision subject to judicial review). “Additionally, piecemeal appeals are not favored by the court and should be avoided.” Foggie v. General Electric, 376 S.C. 384, 390 n. 2, 656 S.E.2d 395, 399 n. 2 (Ct.App.2008).
In Brown v. Greenwood Mills, Inc., the Workers’ Compensation Commission awarded benefits to Brown for an occupa*130tional lung disease. 366 S.C. 379, 382, 622 S.E.2d 546, 548 (Ct.App.2005), cert. denied, January 31, 2007. The circuit court affirmed the Commission on compensability, but found the Commission should have allocated a portion of Brown’s disease to his long history of smoking and remanded for allocation. Id. at 382-83, 622 S.E.2d at 548—49. The remand included “specific direction to make the necessary findings as to the apportionment....” Id. at 386, 622 S.E.2d at 550. This court addressed the appealability of the order under section 1-23-390:
The question here is whether the circuit court order is a “final judgment” under section 1-23-390. Generally, an order is a final judgment on one or more issues if it constitutes an ultimate decision on the merits. In Owens v. Canal Wood Corp., 281 S.C. 491, 316 S.E.2d 385 (1984), one of the two cases cited by the Montjoy court, the supreme court found “[t]he order of the circuit court does not involve the merits of the action. It is therefore interlocutory and not reviewable by this Court for lack of finality.” Owens, 281 S.C. at 492, 316 S.E.2d at 385 (emphasis added) (citations omitted). Similarly, in Hunt v. Whitt, 279 S.C. 343, 306 S.E.2d 621 (1983), the supreme court held that “[because the interlocutory order of the circuit court does not involve the merits of the action, it is not reviewable by this Court for lack of finality.” Id. (emphasis added) (citations omitted). Accordingly, in determining whether the court’s order constitutes a final judgment, we must inquire whether the order finally decides an issue on the merits.
“An order involves the merits if it finally determines some substantial matter forming the whole or part of some cause of action or defense in the case.” Green v. City of Columbia, 311 S.C. 78, 427 S.E.2d 685 (Ct.App.1993) (citing Henderson v. Wyatt, 8 S.C. 112 (1877)). In the case sub judice, the order of the circuit court finally determined an issue on the merits — that Brown’s smoking, a non-compensable cause, contributed to his disability. The court noted “the employer does have the burden of proving ... the interplay of a non-compensable cause” and found “the employer clearly met that burden[.]” Consequently, the circuit court ruled that “the employer was entitled to a determination of the proportion allocable to the non-compensable *131cause[.]” The case was remanded, not for evaluation whether apportionment was appropriate, but “with specific direction to make the necessary findings as to the apportionment between compensable versus non-compensable causes, and a corresponding reduction in the Claimant’s disability award.”
The court’s order mandates apportionment. This ruling is a decision on the merits because it decides with finality whether Greenwood is required to reduce its compensation. ... Although the judge left the percentage of apportionment to the commission on remand, the panel would have no choice but to allocate some part of Brown’s disability to the non-compensable cause. Accordingly, the circuit court’s order constitutes a final decision on the issue of apportionment and is appealable.
Id. at 387-88, 622 S.E.2d at 551 (emphasis in original).
In comparison, in Foggie v. General Electric, also a workers’ compensation case, this court noted an order of the circuit court remanding a case for additional proceedings before an administrative agency is not directly appealable. 376 S.C. 384, 388, 656 S.E.2d 395, 398 (Ct.App.2008). However, we found “where the circuit court’s order constitutes a final decision on the merits and the remand order has no effect on the finality of the decision, the order is immediately appealable.” Id. at 389, 656 S.E.2d at 398.
In Foggie, the circuit court affirmed the Commission on two_ issues; however, the court remanded the case to the Commission to make determinations related to permanent total disability and credit for veteran’s disability. Id. at 387, 656 S.E.2d at 397. We distinguished Foggie from Brown v. Greenwood Mills because the order in Brown finally determined the issue on the merits — that the employee’s smoking contributed to his disability — and the remand by the circuit court determined with finality whether there would be a reduction in compensation, leaving open only the determination of the percentage of apportionment for the Commission. Id. at 389, 656 S.E.2d at 398. Whereas, the order in the Foggie case was not a final decision on the merits because the circuit court did not make a final determination regarding whether or not the claimant was totally and permanently *132disabled and did not finally determine the employer’s entitlement to the veteran’s disability credit. Id. We noted that both of the remanded issues were matters within the purview of the Commission, not this court, and because the issues had not been properly considered by the Commission, the circuit court was correct in remanding the case. Id. at 390, 656 S.E.2d at 398. We also noted the Commission is the ultimate fact finder, and for this court to review the record and make factual findings on the remanded issues would violate the governing APA statutes. Id. at 390, 656 S.E.2d at 398-99. Therefore, we held the circuit court order remanding the two issues was not a final decision on the merits and, thus, was not immediately appealable. Id.
Respondents argue Appellants should have appealed from the March 30, 2006 Order of the Board because the decision as to consistency was on the merits, and thus, was immediately appealable. Respondents further argue because Appellants failed to appeal from the March 30, 2006 Order, the holdings of that order are now the law of the case, and the only matter that remained after the March 30, 2006 Order concerned the final disposal capacity of the landfill.
However, this case also is distinguishable from Brown because the Board remanded the case to the ALC not only for a determination on the capacity of the landfill, but also for a determination as to whether DHEC was bound by the landfill capacity stated in Jasper County’s Letters of Consistency, which the Board found to be a valid amendment of the Plan. As a result, this case is more similar to Foggie because only the ALC could determine whether DHEC was bound by the capacity stated in the Letter of Consistency or whether DHEC is the sole agency that can determine capacity. Therefore, until the ALC ruled on that issue, there was no final agency decision on the merits in this case and Appellants had not exhausted all of their administrative remedies.6 As a *133result, Appellants timely filed their appeal after the receipt of the July 9, 2007 Order.
II. S.C.Code Ann. § 44-96-80(0)
Appellants argue Jasper County lacked authority to unilaterally amend the 1994 Low Country Plan, meaning the County’s purported amendments to the plan were invalid and the ALC correctly denied the permit to T & T because the proposed landfill is inconsistent with the 1994 Low Country Plan. We disagree.
“The primary rule of statutory construction is that the Court must ascertain the intention of the legislature.” Cooper v. Moore, 351 S.C. 207, 212, 569 S.E.2d 330, 332 (2002). “In ascertaining the intent of the legislature, a court should not focus on any single section or provision but should consider the language of the statute as a whole.” Mid-State Auto Auction of Lexington, Inc. v. Altman, 324 S.C. 65, 69, 476 S.E.2d 690, 692 (1996). “Subtle or forced construction of statutory words for the purpose of expanding a statute’s operation is prohibited.” TNS Mills, Inc. v. S.C. Dep’t of Revenue, 331 S.C. 611, 624, 503 S.E.2d 471, 478 (1998). “The construction of a statute by the agency charged with its administration will be accorded the most respectful consideration and will not be overruled absent compelling reasons.” Brown, 348 S.C. at 515, 560 S.E.2d at 414 (quoting Dunton, 291 S.C. at 223, 353 S.E.2d at 133). Our supreme court has determined that DHEC, not the county, is charged with ensuring landfills meet the requirements for permitting. Southeast Res. Recovery, Inc. v. S.C. Dep’t of Health & Envtl. Control, 358 S.C. 402, 408, 595 S.E.2d 468, 471 (2004).
Section 44-96-80(0) of the South Carolina Code states “[a]ny amendments to a county or regional solid waste management plan must be adopted and implemented in the same manner as provided for in the initial plan.” S.C.Code Ann. § 44-96-80(0) (2002). However, the Low Country Plan does not specifically state how the Plan is to be amended. The SWPMA does not suggest that merely by proceeding under a regional plan, a county loses the power to make independent planning decisions regarding solid waste facilities located within its borders, or that such authority is then automatically *134ceded to a regional Council of Governments or other organization.
In addition to getting approval for the landfill at county meetings, Jasper County approved and issued four Letters of Consistency to DHEC. At that time, accepting a letter of consistency from a county was a common DHEC practice.7 In the past, the counties included in the Low Country Plan acted independently in modifying the plan as to their individual counties and making solid waste planning decisions. Oakwood had the Low Country Plan modified as it pertains to its landfill in Jasper County by the same procedure as the one in this case — Oakwood had a letter of consistency issued by the County in April 2001, allowing it to significantly expand its facility. Also, Colleton County amended the plan as it relates to that, county and Beaufort County filed its own plan. None of these actions were challenged by the LCCG. Furthermore, Chris Bickley, Executive Director of the LCCG, testified Jasper County was free to amend its solid waste plan without obtaining approval from the LCCG and the Low Country Plan does not state the LCCG has to approve any amendments made by county government. Also, no testimony or evidence in the record supports the conclusion that either the LCCG or the member counties acting collectively were required to approve any plan amendment as it applied to any one county member through a “multi-party endorsement.”
We find the Board correctly construed the statute to mean that counties participating in a regional plan retain the planning authority granted to the counties under section 44-96-80 of the South Carolina Code, unless the express terms of the plan indicate the counties have chosen to delegate that planning authority to a regional authority. Therefore, Jasper County properly amended the Low Country Plan as to Jasper County. As a result, Jasper County properly approved the T *135& T landfill and the landfill was consistent with the 1994 Low Country Plan.
III. S.C.Code Ann. § 44-96-80(F)(l)
Appellants argue the ALC correctly found the failure of the LCCG to include Jasper County’s revisions in its annual report to DHEC was evidence the revisions had not been recognized by the LCCG as valid amendments to the 1994 Low Country Plan. We disagree.
Section 44-96-80(F)(l) of the South Carolina Code states:
Each county or region submitting a solid waste management plan to the department shall thereafter submit an annual progress report to the department by a date to be determined by the department. The annual report shall contain information as may be requested by the department but must contain, at a minimum, the following: (1) any revisions to the solid waste management plan previously submitted by the county or region.
S.C.Code Ann. § 44-96-80(F)(l) (2002).
Section 44-96-80(F)(l) is not a provision that makes inclusion of a revision in the annual progress report mandatory for recognition and acceptance of an amendment to a solid waste management plan. The statute does not provide that revisions will be rendered null and void unless they are contained in the annual progress report. Jasper County did not include its amendments to its local solid waste management plan in the annual progress report to DHEC, but DHEC was made aware of Jasper County’s revisions in the County’s Letters of Consistency, which was an accepted method of notification to DHEC. Therefore, the annual progress report is not the only means by which DHEC may become aware of revisions to the Low Country Plan.
IV. Final Disposal Capacity
Appellants argue if Jasper County’s Letters of Consistency are deemed effective to amend the 1994 Low Country Plan, the amendment can only be effective for the maximum capacity authorized in the letters. We disagree.
*136Section 44-96-320(A) of the South Carolina Code provides that DHEC “shall promulgate, in addition to regulations generally applicable to all solid waste management facilities, regulations governing the siting, design, construction, operation, closure, and postclosure activities of all landfills that dispose of solid waste.” S.C.Code Ann. § 44-96-320(A) (2002). Also, Section 44-96-290(H) states that “[pjermits issued under this section shall be effective for the design and operational life of the facility, to be determined by [DHEC]....” S.C.Code Ann. § 44-96-290(H) (2002).
DHEC is the sole agency with the authority to promulgate regulations governing the design of landfill facilities; therefore, it is the only entity with the authority to determine a landfill’s final disposal capacity. Also, the ALC found that setting the final disposal capacity at 2.2 million cubic feet, as stated in the Letters of Consistency, would allow the facility to operate for only four or five months, which is an absurd result. Therefore, the ALC correctly determined DHEC properly set the disposal capacity at 1,819,000 cubic yards.
CONCLUSION
Accordingly, the Orders of the Board are
AFFIRMED.
THOMAS, J., concurs. PIEPER, J., concurs in a separate opinion.. Section 44-96-290(F) of the South Carolina Code states "[n]o permit to construct a new solid waste management facility ... within a county or municipality may be issued by the department unless the proposed facility ... is consistent with local zoning, land use, and other applicable local ordinances, if any; [and] the proposed facility ... is consistent with the local or regional solid waste management plan and the state solid waste management plan.” S.C.Code Ann. § 44-96-290(F) (2002).
. These letters are referred to as Letters of Consistency by the parties.
. DHEC often received such letters from counties and DHEC’s practice was to handwrite the changes into the applicable plan. The LCCG has *126not amended the 1994 Low Country Plan since its adoption; however, at the time of DHEC’s review, the LCCG had submitted to DHEC a December 2002 draft plan to replace the 1994 plan. DHEC did not consider the draft plan in its review because at the time it had not been approved by the regional counties.
. Section 44-96-80(0) of the South Carolina Code states ”[a]ny amendments to a county or regional solid waste management plan must be adopted and implemented in the same manner as provided for in the initial plan.” S.C.Code Ann. § 44-96-80(0) (2002). The Low Country Plan does not specifically state how the plan is to be amended.
. The ALC found the application of a final disposal capacity of 2.2 million cubic feet for the facility would create an absurd result as it would allow the facility to operate for only four to five months, well below the design life of the facility and contrary to section 44-96-290(H) of the South Carolina Code. S.C.Code Ann. § 44-96-290(H) (2002). The ALC also concluded section 44-96-320(A) of the South Carolina Code provides DHEC is the sole agency with the authority to promulgate regulations governing the design of landfill facilities; therefore, it is the only entity with the authority to determine a landfill's final disposal capacity. S.C.Code Ann. § 44-96-320(A) (2002). South Carolina Regulation 61-107.11 imposes final disposal capacity restrictions on landfills based on a facility’s design, including its size, dimension, layout, setbacks, buffers, and depth to groundwater. 25A S.C.Code Ann. Regs. 61-107.11 (Supp.2007).
. South Carolina Code section 1-23-380(A) states that “[a] party who has exhausted all administrative remedies available within the agency and who is aggrieved by a final decision in a contested case is entitled to judicial review.” S.C.Code Ann. § 1-23-380(A) (Supp.2007). Thus, because the March 30, 2006 Order was not a final decision, Appellants' administrative remedies were not exhausted until after the July 9, 2007 Order.
. Rudy Curtis, of DHEC, testified that since 1994, the low country's process to modify the Low Country Plan was to take action by any county council and notify DHEC of the activity. Once DHEC was notified of the activity, it became an attachment to the 1994 Plan and was a part of that Plan. Also, Arthur Braswell, Manager of DHEC’s Division of Solid Waste Management, testified DHEC considers Letters of Consistency as modifications to a plan, not just as letters.