Safety Assessment Program Evaluator Student Manual

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CA Emergency Mgmt. Agency Safety Assessment Program Evaluator Manual April 2011Photo courtesy Cal EMAFigure 5-5 – Block failure of road subsurface, 2005-06 Winter StormsFigures 5-3 and 5-4 show a landslide that occurred in San Francisco. The rock debris at the toeof the slide damaged a building there.Figure 5-5 shows a condition called “block failure.” Oversaturation of soils on hillsides can leadto the hillside moving in large sections, or “blocks,” in this case, taking the roadway with them.Photo courtesy Dave Swanson, EERIFigure 5-6 – Scarp through community in China136
CA Emergency Mgmt. Agency Safety Assessment Program Evaluator Manual April 2011Photo courtesy Dave Swanson, EERIFigure 5-7 – Lateral spreadingA copy of the Geotechnical Evaluation form is on the next two pages.5.2.1 Completing the Geotechnical Evaluation FormRecommendations – This section of the form can be used to request regular monitoring of thesite, to watch for continued ground movement that may cause additional damage to the facility.Ideally, the evaluator will indicate what needs to be monitored, why, and if there is a point wherethe condition could point to a re-evaluation of the facility for safety, or some other necessaryaction. The second part of this section allows the evaluator to provide information about theposting decision that would be important for the jurisdiction to know. This section can also beused to elaborate on monitoring conditions.Comments – This section is used to explain anything that needs additional explanation. If thereis not enough room in the provided area on the form, the evaluator can write “Over” in theremaining space and continue on the back of the form.Damage Observed (DO) – The damage observed scale runs from 0 to 6, and is used to rate thedamages that are found. Damage rates run from 0=None, to 3=Moderate, to 6=Total. This scalegives the evaluator and the jurisdiction a toll to indicate the level of damage. However, theevaluator‟s use of the scales is based strictly on their professional judgment.Section D – Observed Geotechnical Conditions with Effect on Facility – Using the DamageObserved, the evaluator will look at all the conditions and describe the effect of the condition.This lets the jurisdiction know how bad the geotechnical conditions are at the site. The secondpart of the evaluation describes the impact of that condition. Remember, the two evaluations can137
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