Safety Assessment Program Evaluator Student Manual

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CA Emergency Mgmt. Agency Safety Assessment Program Evaluator Manual April 20115.7.1 Completing the Pump Station Evaluation FormRecommendations - This section shows the typical recommendations that would apply to pumpstations, though not necessarily the only ones. The overall recommendations of the SAP teamare noted here by checking the appropriate circles, after the evaluation is complete. If themonitor circle is checked, the evaluator must be sure to note in the Comments section theconditions that need to be monitored and the criteria. Also, if another action must be taken whena threshold is reached during the monitoring, that must be noted as well. If the “Brace Structure”circle is marked, the SAP team must make sure to describe the condition in the commentssection. For other circles, add information in the Comments section when appropriate.Comments – This section is used to provide explanations regarding any part of the evaluationthat the SAP team believes requires an explanation. When a pump station will be postedRESTRICTED USE, the evaluator would note the restrictions if they are not checked off in theRecommendations section. If the pump station is to be posted UNSAFE, the reasons for thatposting are provided here. If there is not enough room for all the comments, simply note “Over”at the bottom of the form and continue on the back side.Pump Station Description – In this section, the evaluator describes the type of pump, and theconstruction and materials of the station.Damage Observed - The damage observed scale runs from 0 to 6, and is used to rate the damagesthat are found. Damage rates run from 0=None, to 3=Moderate, to 6=Total. This scale gives theevaluator and the jurisdiction a toll to indicate the level of damage. However, the evaluator‟s useof the scales is based strictly on their professional judgment.Sections E through K – These sections provide the evaluation of the various components of thestation. If the station is above ground and inside a structure, a small note in this sectionregarding the building safety assessment would be appropriate. For each element, estimate thelevel of damage using the damage scale. For areas not seen, use the “NO” (Not Observed)rating. Remember, as with buildings, do not do destructive testing. In Item K, if leakage isfound, make a “best estimate” on the leakage rate.Section L – This section allows the SAP team to expand in some detail the results of theassessment. As with the Comments section, if there is not enough room, simply mark “Over” atthe bottom and continue on the back side of the form.5.7.2 PostingUpon completing the evaluation, the team will recommend the posting. If it is found that thepump station is seriously damaged and needs to be removed from service, the jurisdiction needsto be informed at once. The jurisdiction will then contact Public Works to ensure that the properactions are taken. If no jurisdiction representative can be quickly located, the SAP team mustcontact the SAP coordinator to report their findings. In cases where recommendations are nottime sensitive, the team can wait until they turn in their findings to the SAP coordinator in theevening. If the pump station is in an above ground building and a building evaluation has beenperformed as well, the building must be posted based on the building’s safety assessment. If thebuilding itself has a RESTRICTED USE or UNSAFE posting placed on it, the evaluator is tonote on the placard the reasons for the posting.164
CA Emergency Mgmt. Agency Safety Assessment Program Evaluator Manual April 20115.8 Reservoirs (Tanks)This section refers to steel or reinforced concrete tanks, commonly referred to as „reservoirs.‟Many jurisdictions around the state use water tanks for storing domestic water supplies. Thesetanks are highly susceptible to damage from earthquakes. It is possible that safety evaluationsmay be performed on tank reservoirs after other types of disasters, but it is most likely that tankswill be evaluated for safety after a strong earthquake.Because the water in these tanks is used to fight fires as well as to drink, they are very importantto local governments after a disaster, especially when the local government‟s water mains havebeen disrupted.Some of the types of damage that may occur to unanchored steel tanks include uplift of the entiretank, leading to the connecting piping being damaged or broken. When ground motions becomestrong and the tank is forced into resisting overturning forces, the tank wall will buckle at thebase, leading to the condition called „elephant‟s foot.‟ In severe cases, the floor to roof seam willburst open. Sloshing water can also damage the roof of the tank.Concrete tanks with steel cable reinforcing can slide off their foundations and suffer roof damagefrom sloshing as well. They can also suffer damage from failure of the reinforcing if the designwas not adequate for the seismic forces being resisted.Photo courtesy Steinbrugge CollectionFigure 5-21 – Steel water tank with „elephant‟s foot‟ buckling165
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