At Robinson Haulage we specialize, and are authorized installers of Waterloo Biofilter and Ecoflo Biofilter treatments systems. Robinson Quarry specializes in sand and gravel, we cut out the middleman by producing and crushing directly on-site. Our companies often work hand in hand to ensure that you are given great prices and great service. Quarry Hours (Seasonal): Monday - Friday: 6:30am-5:30pm. Members of the Ontario Onsite Wastewater Association. more... See more text