Hercules voters will decide Tuesday whether to approve a 1% sales tax to pay for basic city services such as police, parks, roads, and water quality and to address a growing budget gap. Mayor Chris Kelley says Measure P would generate $4 million annually to help close a budget deficit that is expected to be Hercules voters will decide Tuesday whether to raise a 1% sales tax to pay for basic city services such as police, parks, roads, and water…