On-Site Sewage Facilities (OSSF) Site/Soil Evaluators


The Comal County Engineer's Office does not endorse or promote any particular OSSF Designer. This list is provided solely as a courtesy to the public.

To inquire about being added to this list, please email us your contact information, and which list you are wanting to be added to.

AAA Septic Design

Alamo Septic Designs, LLC

April Porter

    • OS0026816
    • 775 Old Lehmann Rd
    • Seguin, TX 78155
    • Phone: (512) 801-9837
    • phonePhone

AusTex Development

Bull's Eye Septic Systems

    • Keith Gott
    • OS0006286 / 0024419
    • P.O. Box 182
    • Waring, TX 78074
    • Phone: (210) 710-3350
    • phonePhone

Cain Septic Design

Central Texas Septic & Aerobics

D.L. Davidson Contractors

David Graham, P.E.

    • P.O. Box 1284
    • Boerne, TX 78006
    • Phone: (800) 869-2783
    • phonePhone

David Seagraves, Geologist, R.S.

    • OS6893 / PG3917
    • 723 Nakoosa Dr
    • San Antonio, TX 78260
    • Phone: (830) 438-3344
    • phonePhone
    • Cell: (210) 508-9353
    • cellCell

Environmental Concepts, LLC

Envirowell Services

Flugrath Construction

    • David Flugrath
    • OS9620 / 586 / 1648
    • 1235 Lone Oak Drive
    • New Braunfels, TX 78132

Greg Johnson, P.E., R.S.

Hays Environmental Engineering, Inc.

Hill Country Septic and Construction

JB Septic Systems, Inc.

Johnnie J. Bohuslav, P.E./R.S.

    • 129 Maderas
    • Seguin, TX 78155
    • Phone: (830) 560-1659
    • phonePhone

Keith C. Strimple, P.E.

    • P.O. Box 391
    • McQueeney, TX 78123
    • Phone: (830) 560-3200
    • phonePhone

Ken Eastman Construction

Land Stewardship Services, LLC

    • Hoyt Seidensticker
    • OS8771
    • 27115 Bent Trail
    • Boerne, TX 78006

Mangold Engineering

Monica Wallace, S.E.

Plan-It Septic Design & Services, LLC

Septic Systems Express

Shell Engineering Group

    • Jennifer Shell, P.E.
    • 91159
    • 1908 W McCarty Ln
    • San Marcos, TX 78666
    • Phone: (512) 787-4090
    • phonePhone

South Texas Wastewater Treatment

Stephen Jetton, R.S.

    • 1400 Clarewood Dr
    • San Marcos, TX 78666
    • Phone: (512) 392-3700
    • phonePhone
    • Cell: (512) 757-1259
    • cellCell

Steven Kubena, R.S.

Super Fast Septic

Texas Super Septic

Thalia Rivas R.S.

Vern Richard Schrank, P.E.

    • 2619 Christoper
    • Galveston, TX 77551
    • Phone: (830) 899-4577
    • phonePhone

Virginia Castro

Wes Magley

Willco Engineering, PLLC

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