Contact Us OSO Liquid Waste Septic Services & Portable Toilets Serving the Greater Bexar & Wilson County Areas Office Locations: San Antonio, Texas & Floresville, Texas Call Us: 210.707.0038 OR Submit our request form to request a quote or get more information. Request Quote Name Email Address Address Phone What service are you seeking? What service are you seeking? Septic Tank Service Porta Potty Rentals Please give details to your request. 15 + 8 = Submit Request