Wastewater Dispersal Design Guide
details the equipment and design considerations for effective applications of drip irrigation technology to on-site wastewater.

EPRI/TVA Report on Wastewater
Subsurface Drip Guidelines
Subsurface drip distribution is the most efficient method for application and dispersal of wastewater into the soil.

The Wastewater Subsurface Drip Distribution report and Design Spreadsheet from EPRI is a peer reviewed document and contains third-party design details.