II.  Case No. 838 The Union alleges that the City's refusal to ratify the ten- tative agreement previously ratified by the Union violated Sections 10.1,  10.2(a), 10.2(e) and 10.2(f) of the Act. The disagrement here centers around the question of whether the parties had actually reached  total agreement on July 6, 1976, and if total agreement was reached, whether the City's refusal to ratify and sign the contract constitutes a violation of its duty to bargain. The NLRB has dealt with an identical issue in Printing Indus- tries of Northern California.  In that case the NLRB ruled that the employer did not refuse to bargain when it refused to execute an agreement allegedly  reached with the union, since the refusal to sign was grounded solely on the employer's contention that the con- tract contained overtime provisions to which the employer had not agreed.- In Trade Mart, Inc., however, the NLRB found that the employer had violated  its duty to bargain by refusing to sign the agreement negotiated with the union.  The Board found no merit to the employer's contention  that no final agreement had been reached on holiday pay 9/ at the time of the employer's refusal.-' Thus, the determining  factor is whether or not the parties had actually  reached agreement on all areas of the contract.  In the instant case, the testimony  from the Union's own witness, Knopka, indicated that disagreement  still existed between the parties after July 6, as to the method of implementation of the wage increase and 8/  Printing Industries of Northern California, 83 LRRM 1638  (1973) . 9/  Trade Mart, Inc., 83 LRRM 1568  (1973).

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