In a proceeding to confirm an arbitration award, Shirl-Ann Construction Corp. appeals, as limited by its brief, from so much of an order of the Supreme Court, Rockland County, dated July 11, 1979, as, upon reargument, adhered to the original determination (1) that there was an existing agreement between the parties to arbitrate and (2) denying Shirl-Ann’s application to vacate the entire award. Order reversed insofar as appealed from, on the law, with $50 costs and disbursements, and matter remanded to an arbitrator designated by the New York State Board of Mediation for a hearing de novo on all matters encompassed within the grievances. At the outset, we note our agreement with Special Term that the petitioner’s service by ordinary mail of a notice of intent to arbitrate was in derogation of the statute and a legal nullity (see CPLR 7503, subd [c]; see, also, Matter of Standard Steel Section v Royal Guard Fence Co.,
