OSSF DR EXAM 135 QUESTIONS & CORRECT
ANSWERS LATEST 2025
Beginning of OSSF statewide regulation - ANSWER-1989
___ adopted the current OSSF Rules in 1997 and revised them several times. -
ANSWER-TCEQ
DR job responsibilities - ANSWER-- review permit applications
-complaint investigation
- record keeping
State regulation transferred to Texas Water Commission - ANSWER-1992
OSSF - ANSWER-- produces not more than 5,000 GPD of waste
-used only for disposal on-site
-disposal through soil or as a vapor
Authorized Agent - ANSWER-local government entity authorized by TCEQ to
enforce OSSF laws
Designated Representative - ANSWER-Designated by authorized agent or TCEQ to
review permit apps and planning materials, and conduct inspections
,Site Evaluator - ANSWER-Must hold valid SE or Professional Engineer's license (PE)
Requirement for installer II and DR to be licensed became effective - ANSWER-
1998
Ten Acre Rule - ANSWER-Permitting exemption
-property is 10 acres or larger
- single family
- disposal lines at least 100 ft from property line
- does not create a nuisance
Minimum lot size for subdivisions serviced by public water - ANSWER-minimum
1/2 acre
Minimum lot size for subdivisions serviced by private water - ANSWER-minimum 1
acre
Legal penalties for violating OSSF regulations - ANSWER-- criminal penalties
-court injunction
- administrative penalties
OSSF licenses that require previous experience - ANSWER-Installer II, MP, SE
, OSSF licenses are issued for a term of... - ANSWER-3 years
9 steps of permit proces - ANSWER-1. site evaluation
2. select OSSF
3. system planned by PE or RS
4. permit application
5. application reviewed by permit authority
6. ATC
7. construction
8. system inspection
9. ATO
Planning materials for an OSSF utilizing SECONDARY TREATMENT must be
prepared by a... - ANSWER-PE or RS
OSHA requires that all excavations over __ feet deep be sloped/shored - ANSWER-
5 feet
Important conversions - ANSWER-- 1 acre = 43,560 ft^2
- 1 cubic foot = 7.48 gal
- 1 cubic foot = 27 cubic yd
BOD Formula - ANSWER-[BOD (mg/L) * 8.34 * Q (GPD) ] / 1,000,000
Pathogens - ANSWER-disease-causing microorganisms
ANSWERS LATEST 2025
Beginning of OSSF statewide regulation - ANSWER-1989
___ adopted the current OSSF Rules in 1997 and revised them several times. -
ANSWER-TCEQ
DR job responsibilities - ANSWER-- review permit applications
-complaint investigation
- record keeping
State regulation transferred to Texas Water Commission - ANSWER-1992
OSSF - ANSWER-- produces not more than 5,000 GPD of waste
-used only for disposal on-site
-disposal through soil or as a vapor
Authorized Agent - ANSWER-local government entity authorized by TCEQ to
enforce OSSF laws
Designated Representative - ANSWER-Designated by authorized agent or TCEQ to
review permit apps and planning materials, and conduct inspections
,Site Evaluator - ANSWER-Must hold valid SE or Professional Engineer's license (PE)
Requirement for installer II and DR to be licensed became effective - ANSWER-
1998
Ten Acre Rule - ANSWER-Permitting exemption
-property is 10 acres or larger
- single family
- disposal lines at least 100 ft from property line
- does not create a nuisance
Minimum lot size for subdivisions serviced by public water - ANSWER-minimum
1/2 acre
Minimum lot size for subdivisions serviced by private water - ANSWER-minimum 1
acre
Legal penalties for violating OSSF regulations - ANSWER-- criminal penalties
-court injunction
- administrative penalties
OSSF licenses that require previous experience - ANSWER-Installer II, MP, SE
, OSSF licenses are issued for a term of... - ANSWER-3 years
9 steps of permit proces - ANSWER-1. site evaluation
2. select OSSF
3. system planned by PE or RS
4. permit application
5. application reviewed by permit authority
6. ATC
7. construction
8. system inspection
9. ATO
Planning materials for an OSSF utilizing SECONDARY TREATMENT must be
prepared by a... - ANSWER-PE or RS
OSHA requires that all excavations over __ feet deep be sloped/shored - ANSWER-
5 feet
Important conversions - ANSWER-- 1 acre = 43,560 ft^2
- 1 cubic foot = 7.48 gal
- 1 cubic foot = 27 cubic yd
BOD Formula - ANSWER-[BOD (mg/L) * 8.34 * Q (GPD) ] / 1,000,000
Pathogens - ANSWER-disease-causing microorganisms
