S&L handles the work where there's no municipal sewer to tie into. Soil evaluation, on site sewage system design, health department permitting, and installation, including conventional systems and Presby advanced treatment. Systems are designed under Trey Alexander's professional license, and Scot Black leads the field work with more than 30 years in construction surveying and on site sewage. For a developer, it means the septic side of a subdivision can get designed, permitted, and installed by the same company grading the lots.