OECP (Oregon Environmental Control Plan) Exam Actual
Exam 2026/2027: Complete Exam-Style Questions with
Detailed Rationales | 100% Verified | Pass Guaranteed – A+
Graded
Total questions: 75 multiple-choice, single best answer
Recommended time: 2 hours (120 minutes)
Difficulty distribution: Easy (20%), Moderate (65%), Difficult (15%)
Passing threshold: 70% (53 correct) – typical OECP requirement
Exam Questions (numbered 1–75)
1. A developer submits a Notice of Intent (NOI) for a 12-acre residential subdivision in
Washington County on March 15, 2026. The contractor plans to begin clearing on April
1. The DEQ inspector calls on March 25 and states the permit is not yet active. What is
the most likely reason?
A. The contractor must wait until the rainy season ends before starting any land
disturbance
B. DEQ requires at least 10 days between NOI submission and the start of construction
✓ CORRECT
C. The permit fee must be paid in person at the DEQ Portland office
D. The ESCP must be approved by the county before DEQ processes the NOI
Correct answer: B
Rationale: Under Oregon DEQ 1200-C, the permittee must submit the NOI at least 10
days prior to commencing construction activity to allow DEQ processing and
assignment of permit coverage. Option A is incorrect because the rainy season does
not prohibit permit activation. Option C is incorrect because fees are not required to be
paid in person. Option D is incorrect because while local approval may be required
separately, the 10-day DEQ notification period is the specific permit trigger.
,2. A contractor in Multnomah County receives a DEQ inspection notice citing a violation
for failing to conduct a site inspection after a rain event. On the date in question, the site
received 0.45 inches of rain in 24 hours. The contractor argues no inspection was
required. What is the regulatory threshold?
A. 0.25 inches in 24 hours
B. 0.5 inches in 24 hours ✓ CORRECT
C. 1.0 inches in 24 hours
D. Any measurable precipitation
Correct answer: B
Rationale: Oregon DEQ 1200-C requires inspections at least once every 7 days and
within 24 hours of a storm event producing 0.5 inches or more of rain in a 24-hour
period. Option A is incorrect because 0.25 inches is below the regulatory threshold.
Option C is incorrect because 1.0 inches exceeds the actual trigger. Option D is
incorrect because not all measurable precipitation triggers the inspection requirement.
3. A construction site in Eugene has been inactive for 18 days during February. The
exposed soil area is approximately 2 acres of silty clay loam on a 12% slope. No
stabilization has been applied. What is the minimum requirement under the 1200-C
permit?
A. Temporary stabilization must be applied within 14 days of inactivity
B. Exposed areas must be stabilized within 7 days if inactive for more than 14 days ✓
CORRECT
C. Stabilization is only required if the site receives 0.5 inches of rain during the inactive
period
D. The site may remain inactive until April 30 without stabilization
Correct answer: B
Rationale: The 1200-C permit requires that disturbed areas be stabilized within 7 days if
they will be inactive for more than 14 days. Option A is incorrect because the timeline is
7 days, not 14. Option C is incorrect because stabilization is required based on inactivity
,duration, not rainfall occurrence. Option D is incorrect because winter construction
restrictions do not eliminate the obligation to stabilize inactive areas.
4. A project manager in Bend is preparing the annual fee for a 20-acre commercial site
covered under the 1200-C permit. The permit was issued in 2024. What is the typical fee
structure?
A. A one-time fee paid at NOI submission with no annual renewal
B. Annual fees are required for the duration of permit coverage until termination is
submitted ✓ CORRECT
C. Fees are only assessed if the site is inspected by DEQ
D. Fees are waived for sites under 25 acres in eastern Oregon
Correct answer: B
Rationale: The 1200-C permit requires annual fees for the duration of active permit
coverage until a Notice of Termination (NOT) is submitted and approved. Option A is
incorrect because the fee is not one-time. Option C is incorrect because fees are not
contingent on inspection. Option D is incorrect because there is no acreage-based fee
waiver for eastern Oregon.
5. A contractor in Coos Bay discharges turbid stormwater directly into a tributary of
Coos Bay during active construction. The discharge contains visible sediment plumes.
What is the regulatory status?
A. Acceptable if the turbidity is below 250 NTU
B. Prohibited unless the site has a DEQ-approved sediment basin
C. Discharge of turbid water to waters of the US is prohibited under the 1200-C permit
✓ CORRECT
D. Permitted during the dry season only
Correct answer: C
Rationale: The 1200-C permit prohibits discharge of turbid water to waters of the United
States; all stormwater must be treated or controlled to prevent sediment-laden
, discharge. Option A is incorrect because there is no NTU threshold that allows turbid
discharge. Option B is incorrect because even with a sediment basin, turbid discharge is
prohibited. Option D is incorrect because seasonal restrictions do not apply to the
turbidity prohibition.
6. A concrete contractor in Portland washes out a mixer truck on-site, and the
washwater flows into a storm drain. The pH of the washwater measures 11.2. What is
the violation?
A. Concrete washwater is prohibited from entering storm drains regardless of pH
B. Cementitious wastewater must have a pH between 6.5 and 8.5 before discharge ✓
CORRECT
C. The pH is acceptable if the discharge lasts less than 30 minutes
D. Only washwater with pH above 12.0 is prohibited
Correct answer: B
Rationale: The 1200-C permit requires that cementitious wastewater be managed to
maintain a pH between 6.5 and 8.5 before discharge; high pH concrete washwater is
toxic to aquatic life. Option A is incorrect because properly managed washwater can be
discharged if pH is controlled. Option C is incorrect because duration does not override
pH requirements. Option D is incorrect because the upper limit is 8.5, not 12.0.
7. A developer in Medford completes construction and final stabilization on a 5-acre
retail site. The vegetation is established and erosion controls are removed. What is the
final step to terminate permit coverage?
A. Submit a Notice of Termination (NOT) to DEQ after achieving final stabilization ✓
CORRECT
B. Permit coverage automatically terminates after 2 years
C. Call the DEQ inspector to conduct a final site visit
D. Remove all BMPs and wait 30 days before notifying DEQ
Correct answer: A
Exam 2026/2027: Complete Exam-Style Questions with
Detailed Rationales | 100% Verified | Pass Guaranteed – A+
Graded
Total questions: 75 multiple-choice, single best answer
Recommended time: 2 hours (120 minutes)
Difficulty distribution: Easy (20%), Moderate (65%), Difficult (15%)
Passing threshold: 70% (53 correct) – typical OECP requirement
Exam Questions (numbered 1–75)
1. A developer submits a Notice of Intent (NOI) for a 12-acre residential subdivision in
Washington County on March 15, 2026. The contractor plans to begin clearing on April
1. The DEQ inspector calls on March 25 and states the permit is not yet active. What is
the most likely reason?
A. The contractor must wait until the rainy season ends before starting any land
disturbance
B. DEQ requires at least 10 days between NOI submission and the start of construction
✓ CORRECT
C. The permit fee must be paid in person at the DEQ Portland office
D. The ESCP must be approved by the county before DEQ processes the NOI
Correct answer: B
Rationale: Under Oregon DEQ 1200-C, the permittee must submit the NOI at least 10
days prior to commencing construction activity to allow DEQ processing and
assignment of permit coverage. Option A is incorrect because the rainy season does
not prohibit permit activation. Option C is incorrect because fees are not required to be
paid in person. Option D is incorrect because while local approval may be required
separately, the 10-day DEQ notification period is the specific permit trigger.
,2. A contractor in Multnomah County receives a DEQ inspection notice citing a violation
for failing to conduct a site inspection after a rain event. On the date in question, the site
received 0.45 inches of rain in 24 hours. The contractor argues no inspection was
required. What is the regulatory threshold?
A. 0.25 inches in 24 hours
B. 0.5 inches in 24 hours ✓ CORRECT
C. 1.0 inches in 24 hours
D. Any measurable precipitation
Correct answer: B
Rationale: Oregon DEQ 1200-C requires inspections at least once every 7 days and
within 24 hours of a storm event producing 0.5 inches or more of rain in a 24-hour
period. Option A is incorrect because 0.25 inches is below the regulatory threshold.
Option C is incorrect because 1.0 inches exceeds the actual trigger. Option D is
incorrect because not all measurable precipitation triggers the inspection requirement.
3. A construction site in Eugene has been inactive for 18 days during February. The
exposed soil area is approximately 2 acres of silty clay loam on a 12% slope. No
stabilization has been applied. What is the minimum requirement under the 1200-C
permit?
A. Temporary stabilization must be applied within 14 days of inactivity
B. Exposed areas must be stabilized within 7 days if inactive for more than 14 days ✓
CORRECT
C. Stabilization is only required if the site receives 0.5 inches of rain during the inactive
period
D. The site may remain inactive until April 30 without stabilization
Correct answer: B
Rationale: The 1200-C permit requires that disturbed areas be stabilized within 7 days if
they will be inactive for more than 14 days. Option A is incorrect because the timeline is
7 days, not 14. Option C is incorrect because stabilization is required based on inactivity
,duration, not rainfall occurrence. Option D is incorrect because winter construction
restrictions do not eliminate the obligation to stabilize inactive areas.
4. A project manager in Bend is preparing the annual fee for a 20-acre commercial site
covered under the 1200-C permit. The permit was issued in 2024. What is the typical fee
structure?
A. A one-time fee paid at NOI submission with no annual renewal
B. Annual fees are required for the duration of permit coverage until termination is
submitted ✓ CORRECT
C. Fees are only assessed if the site is inspected by DEQ
D. Fees are waived for sites under 25 acres in eastern Oregon
Correct answer: B
Rationale: The 1200-C permit requires annual fees for the duration of active permit
coverage until a Notice of Termination (NOT) is submitted and approved. Option A is
incorrect because the fee is not one-time. Option C is incorrect because fees are not
contingent on inspection. Option D is incorrect because there is no acreage-based fee
waiver for eastern Oregon.
5. A contractor in Coos Bay discharges turbid stormwater directly into a tributary of
Coos Bay during active construction. The discharge contains visible sediment plumes.
What is the regulatory status?
A. Acceptable if the turbidity is below 250 NTU
B. Prohibited unless the site has a DEQ-approved sediment basin
C. Discharge of turbid water to waters of the US is prohibited under the 1200-C permit
✓ CORRECT
D. Permitted during the dry season only
Correct answer: C
Rationale: The 1200-C permit prohibits discharge of turbid water to waters of the United
States; all stormwater must be treated or controlled to prevent sediment-laden
, discharge. Option A is incorrect because there is no NTU threshold that allows turbid
discharge. Option B is incorrect because even with a sediment basin, turbid discharge is
prohibited. Option D is incorrect because seasonal restrictions do not apply to the
turbidity prohibition.
6. A concrete contractor in Portland washes out a mixer truck on-site, and the
washwater flows into a storm drain. The pH of the washwater measures 11.2. What is
the violation?
A. Concrete washwater is prohibited from entering storm drains regardless of pH
B. Cementitious wastewater must have a pH between 6.5 and 8.5 before discharge ✓
CORRECT
C. The pH is acceptable if the discharge lasts less than 30 minutes
D. Only washwater with pH above 12.0 is prohibited
Correct answer: B
Rationale: The 1200-C permit requires that cementitious wastewater be managed to
maintain a pH between 6.5 and 8.5 before discharge; high pH concrete washwater is
toxic to aquatic life. Option A is incorrect because properly managed washwater can be
discharged if pH is controlled. Option C is incorrect because duration does not override
pH requirements. Option D is incorrect because the upper limit is 8.5, not 12.0.
7. A developer in Medford completes construction and final stabilization on a 5-acre
retail site. The vegetation is established and erosion controls are removed. What is the
final step to terminate permit coverage?
A. Submit a Notice of Termination (NOT) to DEQ after achieving final stabilization ✓
CORRECT
B. Permit coverage automatically terminates after 2 years
C. Call the DEQ inspector to conduct a final site visit
D. Remove all BMPs and wait 30 days before notifying DEQ
Correct answer: A
