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Study Guide California Designated Operator 2026 Final
Examination WITH COMPLETE QUESTIONS AND CORRECT
ANSWERS |ALREADY GRADED A+|
1. Automatic Tank Gauge - ANSWER--a. Test must be conducted at least
once a month with the tank when the product level in the tank is at
least 3 feet
b. Must detect a 0.2 gallon/hour leak
c. The tank gauge system must generate a hard copy of all data
reported
1. Each tank is monitored individually in accordance with the following
procedures - ANSWER--a. Separate measurements are taking daily of
the fuel and water levels in the tanks
b. Daily reading must be taken of the input (fuel deliveries) and
withdrawals (gasoline dispensed)
c. Product must be allowed to stabilize prior to taking measurements
d. Product must be delivered to the tank through a drop tube that
extends within 12 inches of the bottom of the tank
2. Automatic Tank Gauge Plus Manual Inventory Reconciliation -
ANSWER--a. Test must be conducted at least once a month with the
tank filled within 10% of the highest operating level
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b. Must detect a 0.1 gallon/hour leak
c. The tank gauge system must generate a hard copy of all data
reported
d. Manual inventory reconciliation must be performed in accordance
with appropriate requirements (see section Title 23 section 2646)
2. The daily variation shall be calculated and, at the end of the month
totaled to determine the monthly variation. If the absolute value of the
total monthly variation exceeds 1% of the total input or withdrawal
(throughput) plus 130 gallons, the following steps shall be taken: -
ANSWER--a. Within 24 hours, the local agency must be notified of a
potential unauthorized release.
b. Within 24 hours, inventory records for the previous 30 days shall be
reviewed to determine if a calculation error was made
c. Within 24 hours, all readily accessible equipment must be inspected
d. As appropriate, verify the calibration of all dispenser meters within
24 hours of inspecting all equipment
e. Continue to conduct inventory reconciliation. If a second 30 period
confirms initial results, an unauthorized release must be reported in
accordance with regulatory requirements
f. Conduct additional tests as required by the local agency
3. Statistical Inventory Reconciliation Plus Tank Integrity Testing -
ANSWER--a. Statistical inventory reconciliation shall be conducted at
least once per month in accordance with the appropriate requirements
(see Title 23 section 2646.1)
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b. A tank integrity test shall be conducted once every 2 years in
accordance with the appropriate requirements (see Title 23 section
2643.1)
4
4. Manual Inventory Reconciliation Plus Tank Integrity Testing -
ANSWER--a. Manual inventory reconciliation shall be conducted at least
once per month in accordance with appropriate requirements (see Title
23 section 2646)
b. Manual inventory reconciliation must be able to detect a release of
1.0 gallons/hour
c. A tank integrity test shall be conducted once every year in
accordance with the appropriate requirements (see Title 23 section
2643.1)
5. Other Methods Approved by the State Water Board - ANSWER--upon
approval
A monitoring program that relies on the mechanical or electrical
detection in the interstitial space shall include: - ANSWER--1.
Continuous monitoring of the interstitial space
2. An audible and visual alarm system approved by the local agency
3. For methods where that use indirect monitoring to determine if a
release has occurred (e.g., wet annular or continuous vacuum), the
monitoring program shall specify the proposed methods for
determining if a release has occurred
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A secondary containment system for a new tank which is not an
integral part of the of the primary containment shall be - ANSWER--
designed and constructed according to an engineering specification
approved by a state registered professional engineer or according to a
nationally recognized industry code or engineering standard.
A tank integrity test that is used as part of a monitoring program shall
meet appropriate regulatory requirements and shall be conducted
using one of the following methods: - ANSWER--1. A volumetric Test
a. Shall be capable of detecting a release of 0.1 gph from any portion of
the tank
b. The tank must be at least 65% full or the tank can be at any product
level if the entire tank is tested under pressure equivalent to a full tank
c. If the test is conducted at a product level lower than the overfill
protection device set point, a nonvolumetric test must be performed
on the ullage portion of the tank
2. Nonvolumetric Test
a. Must be capable of detecting a 0.1 gph leak from any portion of the
tank at any product level
A visual interstitial monitoring plan for new tanks shall include: -
ANSWER--1. Inspection of all tank surfaces and the floor beneath the
tank by direct viewing
Study Guide California Designated Operator 2026 Final
Examination WITH COMPLETE QUESTIONS AND CORRECT
ANSWERS |ALREADY GRADED A+|
1. Automatic Tank Gauge - ANSWER--a. Test must be conducted at least
once a month with the tank when the product level in the tank is at
least 3 feet
b. Must detect a 0.2 gallon/hour leak
c. The tank gauge system must generate a hard copy of all data
reported
1. Each tank is monitored individually in accordance with the following
procedures - ANSWER--a. Separate measurements are taking daily of
the fuel and water levels in the tanks
b. Daily reading must be taken of the input (fuel deliveries) and
withdrawals (gasoline dispensed)
c. Product must be allowed to stabilize prior to taking measurements
d. Product must be delivered to the tank through a drop tube that
extends within 12 inches of the bottom of the tank
2. Automatic Tank Gauge Plus Manual Inventory Reconciliation -
ANSWER--a. Test must be conducted at least once a month with the
tank filled within 10% of the highest operating level
,2|Page
b. Must detect a 0.1 gallon/hour leak
c. The tank gauge system must generate a hard copy of all data
reported
d. Manual inventory reconciliation must be performed in accordance
with appropriate requirements (see section Title 23 section 2646)
2. The daily variation shall be calculated and, at the end of the month
totaled to determine the monthly variation. If the absolute value of the
total monthly variation exceeds 1% of the total input or withdrawal
(throughput) plus 130 gallons, the following steps shall be taken: -
ANSWER--a. Within 24 hours, the local agency must be notified of a
potential unauthorized release.
b. Within 24 hours, inventory records for the previous 30 days shall be
reviewed to determine if a calculation error was made
c. Within 24 hours, all readily accessible equipment must be inspected
d. As appropriate, verify the calibration of all dispenser meters within
24 hours of inspecting all equipment
e. Continue to conduct inventory reconciliation. If a second 30 period
confirms initial results, an unauthorized release must be reported in
accordance with regulatory requirements
f. Conduct additional tests as required by the local agency
3. Statistical Inventory Reconciliation Plus Tank Integrity Testing -
ANSWER--a. Statistical inventory reconciliation shall be conducted at
least once per month in accordance with the appropriate requirements
(see Title 23 section 2646.1)
,3|Page
b. A tank integrity test shall be conducted once every 2 years in
accordance with the appropriate requirements (see Title 23 section
2643.1)
4
4. Manual Inventory Reconciliation Plus Tank Integrity Testing -
ANSWER--a. Manual inventory reconciliation shall be conducted at least
once per month in accordance with appropriate requirements (see Title
23 section 2646)
b. Manual inventory reconciliation must be able to detect a release of
1.0 gallons/hour
c. A tank integrity test shall be conducted once every year in
accordance with the appropriate requirements (see Title 23 section
2643.1)
5. Other Methods Approved by the State Water Board - ANSWER--upon
approval
A monitoring program that relies on the mechanical or electrical
detection in the interstitial space shall include: - ANSWER--1.
Continuous monitoring of the interstitial space
2. An audible and visual alarm system approved by the local agency
3. For methods where that use indirect monitoring to determine if a
release has occurred (e.g., wet annular or continuous vacuum), the
monitoring program shall specify the proposed methods for
determining if a release has occurred
, 4|Page
A secondary containment system for a new tank which is not an
integral part of the of the primary containment shall be - ANSWER--
designed and constructed according to an engineering specification
approved by a state registered professional engineer or according to a
nationally recognized industry code or engineering standard.
A tank integrity test that is used as part of a monitoring program shall
meet appropriate regulatory requirements and shall be conducted
using one of the following methods: - ANSWER--1. A volumetric Test
a. Shall be capable of detecting a release of 0.1 gph from any portion of
the tank
b. The tank must be at least 65% full or the tank can be at any product
level if the entire tank is tested under pressure equivalent to a full tank
c. If the test is conducted at a product level lower than the overfill
protection device set point, a nonvolumetric test must be performed
on the ullage portion of the tank
2. Nonvolumetric Test
a. Must be capable of detecting a 0.1 gph leak from any portion of the
tank at any product level
A visual interstitial monitoring plan for new tanks shall include: -
ANSWER--1. Inspection of all tank surfaces and the floor beneath the
tank by direct viewing
