Opinion by

The appellants, Eaymond and Patricia Bowlin, appeal an order of the Court of Common Pleas of Montgomery County which affirmed the decision of the Zoning Hearing Board of Marlborough Township (Board). The Board had upheld a cease and desist order issued against the appellants by the zoning officer of the Township.

The appellants, who purchased the land upon which they now reside in December of 1968, completed construction of their home thereon in April of 1970 and Marlborough Township enacted a zoning ordinance on September 16, 1970, which zoned the property solely for residential and agricultural use. Be*295fore the ordinance was enacted, the appellants had owned and parked a dump truck on this land, the truck being used by Mr. Bowlin to haul dirt, topsoil and crushed stone and they presently store four pieces of equipment upon the property, all used in Mr. Bowlin’s hauling and excavation business: a dump truck, a backhoe, a track loader and a trailer. In 1977, the zoning officer of the Township issued an order directing the appellants to cease and desist from storing this equipment on their premises, contending that such storage constituted an impermissible commercial/ industrial usage of the property. The appellants appealed to the Board1 which held that they could continue to store the dump truck on the premises as a valid nonconforming use, because Mr. Bowlin had been engaged in the business of hauling dirt and stone prior to the enactment of the zoning ordinance2 but that the other equipment must be removed because those pieces were related to Mr. Bowlin’s excavation work. The Board believed that this latter use was a change in the nature of the use made of the premises and that it impermissibly “converted and expanded” the pre-existing nonconforming use. The lower court upheld the Board’s determination that the excavation *296business was separate from tbe hauling enterprise and that storing the earth moving equipment was an additional use rather than an expansion of a nonconforming use.

The appellants contend that nncontradicted evidence established that the excavation and hauling businesses were both undertaken prior to the enactment of the zoning ordinance and that this storage of the additional equipment was a natural and permissible expansion of a nonconforming use and must be allowed to continue. ■

In a zoning case such as this, where the lower court has taken no additional evidence, our scope of review is limited to a determination as to whether or not the Board abused its discretion or committed an error of law. DiNardo v. City of Pittsburgh, 15 Pa. Commonwealth Ct. 279, 325 A.2d 654 (1974). The appellants, as the parties who sought to benefit by the expansion of a nonconforming use, bore the burden, of course, of proving the existence of the prior nonconforming use. McGeehan v. Zoning Hearing Board of Springfield Township, 45 Pa. Commonwealth Ct. 403, 407 A.2d 56 (1979). We must conclude that they failed to meet that burden.

The Board conceded that a lawful use existed relative to the parking of the appellants’ dump truck on the property but further found that this use did not include storage of earth moving equipment, and, after a careful examination of the record, we cannot say that this determination was unreasonable or a mistake of law. Mr. Bowlin’s own testimony was contradictory as to whether or not he conducted excavation work prior to September 1970,3 and the receipts for *297work done which the appellants introduced demonstrated only that the appellants were engaged in the hauling business before enactment of the zoning ordinance and established nothing as to when the earliest excavation projects were undertaken.

We must conclude, therefore, that the Board properly exercised its discretion and we will affirm the order of the lower court.

Order

And Now, this 12th day of December, 1980, the order of the Court of Common Pleas of Montgomery County in the above-captioned matter is affirmed.