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CSE > Regs > Flashcards

Regs Flashcards

1
Q

Alquist-Priolo Earthquake Fault Zoning Act

Year and Quake

A

1971 San Fernando Earthquake, surface rupture

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2
Q

Alquist-Priolo Earthquake Fault Zoning Act

Purpose and Requirements

A
  1. Requires the CGS to compile maps of traces of ACTIVE fault.
  2. Requires disclosure in real estate transactions if the real property is located within
    one of these zones.
  3. Prohibits construction of new homes and other buildings within these zones unless
    there has been a “comprehensive geologic study” done.
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3
Q

Alquist-Priolo Earthquake Fault Zoning Act

Exemptions

A

Single family dwellings up to 2 stories high and

part of a development no more than 3 units (same as SHMA)

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4
Q

Alquist-Priolo Earthquake Fault Zoning Act

Fault Reqs

A

Active Holocene faults with well defined surface trace

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5
Q

Are buildings for human occupancy allowed to be built across a fault trace?

A

No

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6
Q

What do buildings for human occupancy proposed inside a mapped fault zone require?

A

A comprehensive geologic investigation

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7
Q

What is the approved mitigation for building directly on a surface fault?

A

Avoidance (aka not allowed)

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8
Q

What is the setback requirement for building near surface ruptures?

A

50 ft, but also depends on a number of other factors

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9
Q

Seismic Hazards Mapping Act (SHMA)

Year and Quake

A

Loma Prieta Earthquake of 1989, landslides, other ground failure, and liquefaction, no surface rupture

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10
Q

Seismic Hazards Mapping Act (SHMA)

Purpose and Requirements

A
  1. Required the California Geologic Survey to map areas prone to earthquake-induced landslides and liquefaction.
  2. Required the State Geologist to establish regulatory “seismic hazard zones” around these problem areas (Zones of Required Investigation)
  3. Buildings designed for human occupancy proposed to be built within a Seismic Hazard Zone require a geotechnical investigation and mitigation measures to be implemented. Reports must be stamped by a Registered Civil Engineer or Certified Engineering Geologist with specialty in seismic hazard evaluation.
  4. Requires disclosure in a real estate sale that the property is within a seismic hazard zone – it protects the buyer’s “right to know” by disclosure.
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11
Q

Seismic Hazards Mapping Act (SHMA)

Exemptions

A

Single family dwellings up to 2 stories high

and part of a development no more than 3 units (same as A-P)

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12
Q

Well Standard exceptions

A

construction dewatering wells and wells installed for stability of hillsides. Geothermal and cathodic protection wells have standards that are covered in other bulletins

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13
Q

water supply well setbacks

A
  • Any sewer (sanitary, stormwater) pipeline - 50 feet
  • Septic tank or leach field - 100 feet
  • Cesspool or seepage pit - 150 feet
  • Animal or foul enclosure - 100 feet
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14
Q

Annular seal depth requirements

A
  • Community (Public) water supply 50 feet
  • Industrial water supply 50 feet
  • Agricultural supply 20 feet
  • Air-Conditioning 20 feet
  • “All Others” 20 feet
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15
Q

Destruction of wells requirements

A

minimum of upper 20 feet sealed, sand in the rest, seal off intervals to ensure no connection between aquifers (w/ seal extending 10 feet past)

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16
Q

Hollow Stem Auger (HSA) –

A

preferred in environmental investigations because lack of drilling fluid. Can get good core samples. Refusal depends on geology but starts getting difficult ~150 feet. (up to 14-inch?)

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17
Q

Direct Push/CPT/Geoprobe –

A

very common for formation grab samples and multiple quick holes to help in characterization. Highly depth limited depending on geology, as little as 40 feet if very tight soils. (by design, very small diameter)

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18
Q

Air Rotary –

A

generally used when HSA hits refusal or drilling in hard rock. Cuttings blown out top of the hole. (good to larger diameters, 18-inch?)

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19
Q

Sonic Drilling –

A

expensive alternative to HSA and Air Rotary. Bit is vibrated to depth, generally good for deep holes. Excellent core retrieval where detailed logs are important. (roughly same size as HSA)

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20
Q

Mud Rotary –

A

most commonly used for production wells. Benefit of larger diameter holes, uses mud to hold hole open. (good to larger diameters, 18+ inches)

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21
Q

GPR –

A

ground penetrating radar, good for locating most everything in the shallow subsurface

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22
Q

Magnetic -

A

can be used to locate most UST related items but commonly used for electric cables

23
Q

EM Induction –

A

metal detection, good for locating most everything UST

related

24
Q

Line Tracing –

A

induce a signal at one end of an exposed utility or pipe and use a receiver to trace the signal. Mostly used for metal pipes or electric cables.

25
Q

UST confirmation sampling with no water

A

<12k gal = 2 per tank, one under each end
>12k gal = 3 per tank, one under center and each end
1 per 20ft of pipe and under each fitting
1 per fuel dispenser

26
Q

UST confirmation sampling with water

A

<12k gal = 2 per tank, one under each end at water table, 1 water sample
>12k gal = 4 per tank, one under center and each end at water table, 2 water samples
1 per 20ft of pipe and under each fitting
1 per fuel dispenser

27
Q

What is a trench

A

5ft or deeper (spoils count)

28
Q

Shoring or benching required for depth __

A

5ft

• Shoring must be designed by registered engineer

29
Q

Access and egress required for depth __

A

4ft
• Ladder, stairway, ramp, or “other safe means” of egress located so that no more than 25 feet of lateral travel required to exit the trench.
• Ladder must extend above the top of the trench a minimum of 36 inches

30
Q

Stable Rock –

A

natural solid mineral matter that can be excavated with

vertical sides and remain intact

31
Q

Type A Soils –

A

cohesive soil with unconfined compressive strength of > 1.5 tons per sq. ft. Examples: clay, silty clay, sandy clay, clay xxx. Clay content provides strength. NOTE: automatically excluded from A if fissured, has been subject to vibration or has been previously disturbed (and a few other caveats)

32
Q

Type B Soils –

A

cohesive soil with unconfined compressive strength of > 0.5 tons per sq. ft. Examples: silt, angular gravel, or Type A soils that have been downgraded due to a Type A caveat

33
Q

Type C Soils –

A

cohesive soils with unconfined compressive strength of < 0.5 tons per sq. ft. Examples: granular soils, rounded gravel, submerged/seeping soil, submerged rock not stable

34
Q

“Layered Geologic Strata” –

A

where a layered geologic structure exists, the soil must be classified on the basis of the weakest soil layer

35
Q

Sloping requirements (H:V) by soil type

A
  • Maximum allowable slopes by soil type (excavations less than 20 feet):
  • Type A – ¾:1
  • Type B – 1:1
  • Type C – 1 ½:1
36
Q

competent person

A
  • is an individual who is capable of identifying existing and predictable hazards or working conditions that are hazardous, unsanitary, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate or control these hazards and conditions.
37
Q

monterey and sespe formations

A

oil reserves (LA/south CV)

38
Q

radon remediation

A
  1. subslab depressurization (suction fans through pipes)
  2. submembrane suction (crawl spaces, heavy plastic sheeting with vents to outside)
  3. crawlspace depressurization (fan and vent, less reliable)
39
Q

radon hot spots

A

moves around but typically through san joaquin valley, central and south coast

40
Q

radon limit

A

4 piC/L

41
Q

landslide mitigation

A
  1. drainage (divert surface water or control vertical drainage)
  2. rock slopes (anchors, shotcrete, rockfall nets, grading/steps)
  3. soil slopes (grading, or securing the toe with retaining walls, infill, concrete walls, etc.)
42
Q

landslide causes

A
  1. increase in pore pressure (saturation) increases shear
  2. earthquake
  3. weathering or weakness developed along bedding plane
43
Q

liquefaction ingredients

A

loosely packed sands, saturation, movement

44
Q

liquefaction mitigation

A
  1. compaction or densification of soils
  2. cement grouting of sediments to create a sandstone like material
  3. injecting grout beneath existing structures
45
Q

liquefaction hot spot

A

mostly coastal

46
Q

acid mine drainage definition

A
  1. hard rock mine, historical, abandoned mines
  2. pyrite rock mixed with high-value metals, pyrite is iron sulfide, when sitting in tailings it oxodizes and turns into sulfate and sulfuric acid
47
Q

acid mine drainage hot spots

A

everywhere, but mostly central sierras and northern klamath-trinity

48
Q

acid mine drainage mitigation

A
  1. isolate tailings (prevent sulfuric acid formation)
  2. treat or neutralize the sulfuric acid (carbonate minerals but will create more salts, any other base like sodium hydroxide)
49
Q

arsenic

A

gold mining

50
Q

mercury

A

coast ranges, gold mining, mercury mining

51
Q

chemical used for saltwater intrusion indicators

A

chloride

52
Q

Ghyben-Herzberg Equation

A

“for every (unit) of freshwater unconfined aquifer above sea level (h), there are 40 (units) of freshwater aquifer below sea level (z)”- z=40h

53
Q

Portland cement types

A
  • Type I Normal
  • Type II Moderate Sulfate Resistance
  • Type III High Early Strength
  • Type IV Low Heat of Hydration
  • Type V High Sulfate Resistance

CSE (3 decks)

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