Laserfiche WebLink
cracks in concrete bear visual monitoring over time and if required, affirmative action <br /> undertaken to maintain integrity of the tank systems. The earthquake steel shoes are properly <br /> placed for maximum restraint in a seismic event, show no signs of any corrosion, or of steel <br /> fatigue. The earthquake shoes are anchored into the concrete pad by 1 inch expansion anchors <br /> and which are adequate to secure the support system. The anchor bolts indicate no evidence of <br /> any corrosion which would affect their ability to properly anchor. The legs on each of the tanks <br /> allow for the system to be raised at least 6 inches and allows for easy and adequate inspection <br /> beneath the tanks. <br /> Onan Cummins Tank: The foundation legs of the Oran Cummins Generamr-Fuel Tank system <br /> were closely inspected, and found to be free of any damage or defect. There were no cracks at <br /> the foundations which would appear to lead to affecting the integrity of the tank support system. <br /> While there are some minor cracks in the pad, there were no cracks discovered emanating from <br /> any of the steel earthquake anchored brackets beneath the Onan Cummins Generator system. <br /> The cracks appears slight and do not indicate any affect on the stability or integrity of the support <br /> system, nor of further spreading beyond its current length. As is always the case,where there is <br /> a crack in the underlying pad, any cracks which emanate or connect to the earthquake shoes, <br /> should be monitored and repaired if they continue to expand, or appear to affect the stability of <br /> the system. If the support _ „-� ;i <br /> system should be impinged by <br /> additional cracking or by a <br /> seismic event, then anJ <br /> engineered professional repair <br /> should be undertaken to repair • i <br /> or replace any condition which <br /> would affect the ability of the <br /> tanks to maintain their integrity <br /> or their stability. It is the <br /> normal condition of concrete <br /> slabs that they develop small <br /> hairline cracks over time as the <br /> ground beneath them is <br /> constantly in danger of shifting <br /> in a seismic zone, which is <br /> applicable to Stockton, CA. 21As such, a high degree of -- <br /> attention should be paid to any changes in the support system of the tanks. A weakened pad <br /> experiencing a seismic event could cause the tank or tanks to shift from their foundational <br /> supports and as a result,experience a spill or a leak. It is noted herein that there does not appear <br /> to be such a danger in the immediate condition of the pad and supports, but only that slight <br /> cracks in concrete bear visual monitoring over time and if required, affirmative action <br /> undertaken to maintain integrity of the tank systems. The earthquake support brackets are <br /> secured with vibration reducing springs on each of the support to limit the impact of vibration <br /> during operations, which could result in metal fatigue and thus compromise the structure of the <br /> steel supports. The system supports me anchored into the concrete berm pad by %inch anchors <br /> and which are adequate to secure the support system. The anchor bolts indicate no evidence of <br /> any corrosion which would affect their ability to properly anchor. The legs on the tank allows <br />