You must be approved by TCEQ before registering for your exam.      https://www.tceq.texas.gov/licensing/licensing/exams/registration

Test dates and Times: Sign in is from 8:00AM to 1:00PM Monday through Thursday.

Testing Fee: $25

Contact number: 254-526-1520/1194

Items Needed:

• Current, unexpired picture ID (driver's license, passport, state-issued ID, military ID, student ID),  
• Second form of ID (any of the previously listed photo IDs, social security card, birth certificate,  credit/debit card, library card),
• Social security number,
• Your 'Authorization To Test' letter by TCEQ.

Allowed Items:

• Scratch paper (provided),
• Nonprogrammable calculator,
• Landscaping irrigator (engineering scale and graph paper),
• Municipal solid waste (training manuals, notes, rules, etc.)

Retesting: Immediate retesting is allowed with appropriate fee and if time permits.

Additional information at https://www.tceq.texas.gov/licensing/licensing/exams/registration