A thorough site evaluation must be conducted in order to determine the appropriate level of pretreatment prior to final onsite subsurface disposal of the greywater portion of the wastestream. Septic tanks can provide for only primary levels of treatment. Potential environmental impacts associated with tank truck collection of wastewater include holding tank overflows or leaks, or wastewater spillage during either pumping or transport to the wastewater treatment facility. Transport of holding tank wastewater increases loads and wear for public roads, highways and bridges. Energy Consumption Septic tanks do not require power consumption.
Wastewater drains by gravity from the house to the tank.
Energy is consumed by the tank truck while pumping and transport the wastewater to the wastewater treatment facility. State and Local Acceptance Separate grey and blackwater onsite treatment systems are common in Central Texas and elsewhere, although this particular type of system is not frequently used. The use of holding tanks in Austin and Travis County is limited to temporary or very low water uses where other alternatives are not suitable. Privacy Statement 2001 City of Austin, Texas . All Rights Reserved.