Seismic Assessment: Heres Whats Shaking Kathleen Mitchell Olweny - PDF document

Prepared By: Kathleen Mitchell May 9, 2018 Seismic Assessment: Here’s What’s Shaking Kathleen Mitchell Olweny & Associates Key Topics • Regulatory Requirements • Key Program Elements • Seismic Safety Inspection Checklists • Model Seismic Safety Practices • Common Seismic Deficiencies 1

Prepared By: Kathleen Mitchell May 9, 2018 Why Seismic Assessments? • Seismic Assessments are required by OSHA, EPA, and California Accidental Release Prevention Program (CalARP). • Seismic Assessment Objectives • Reduce the likelihood of releasing significant quantities of regulated hazardous substances in an earthquake. • Assess the seismic vulnerability of the process equipment and piping that contain the regulated substance, including their support structures. • Issue recommendations for correction of any seismic deficiencies that are established. Facilities Required to have Seismic Assessments • Any business that has more than a specified threshold quantity of a regulated substance present at the facility. • Typical facilities include cold storage facilities, power production plants, water & wastewater treatment facilities, gas producers, and chemical plating shops. • Common regulated substances include ammonia, chlorine, sulfur dioxide, various hydro ‐ carbons like butane and propane, and fumigants. 2

Prepared By: Kathleen Mitchell May 9, 2018 Key Program Elements • Determine the equipment in each covered process requiring evaluation and generate a list of critical equipment and support structures. • Review previous seismic evaluations (especially 5 yr updates) to determine current compliance, and layout a strategy for field inspection. • Perform a systematic inspection walkdown of the equipment to look for potential seismic vulnerabilities. Key Program Elements Continued • Establish site specific seismic hazards including seismic ground motion (seismic accelerations), liquefaction, landslides, and ground surface fault rupture. • Perform engineering evaluations as necessary. • Design upgrades or issue recommendations/repairs for deficiencies. • Generate and issue an assessment report. • Certification by administering agency 3

Prepared By: Kathleen Mitchell May 9, 2018 Key Program Elements Other Local Emergency Planning Committee Regions  Walkdown  Checklist Documentation  Evaluation by a Qualified Individual Equipment Inspection Checklists Inspection Focuses on: • Anchor bolts – missing, loose, corroded, size • Welds – corroded, cracked, size • Saddles – corrosion, size • Seismic bracing – sufficient, corrosion • Foundation – concrete damage • Seismic clearance/flexibility • Proximity to adjacent structures • Impact threat from adjacent non ‐ critical equipment 4

Prepared By: Kathleen Mitchell May 9, 2018 Example of Well ‐ Anchored Equipment Cylinders are secured to skid with anchoring straps. The skid is bolted to the concrete pad. Example of Well ‐ Anchored Equipment Anchor bolts for Receiver are present, adequate and in good condition. 5

Prepared By: Kathleen Mitchell May 9, 2018 Example of Well ‐ Anchored Equipment Evaporator has vertical and lateral support. Example of Well ‐ Anchored Equipment Vessel well ‐ secured to support frame. Support frame bolted to floor. 6

Prepared By: Kathleen Mitchell May 9, 2018 Common Equipment Deficiencies • Anchoring corrosion • Vessel support shows cracking or corrosion • Lateral support bracing needed • Anchor bolts ‐ missing or undersized Vessel has a missing anchor bolt. Example of Equipment Deficiency Support of Chiller and raised platform supporting Evaporative Condenser shows signs of corrosion. 7

Prepared By: Kathleen Mitchell May 9, 2018 Example of Equipment Deficiency Support foundation has sizable crack. Example of Equipment Deficiency Vessels require lateral support or bracing. 8

Prepared By: Kathleen Mitchell May 9, 2018 Examples of Equipment Deficiency Vessels supported on hangers are subject to sideway. Lateral bracing is recommended. Example of Equipment Deficiency Poor support system for this tank. 9

Prepared By: Kathleen Mitchell May 9, 2018 Piping/Hoses Inspection Checklists Inspection Focuses on: • Excessive corrosion • Large unsupported spans • Short rigid spans • Possibilities of excessive seismic anchor movement • Inadequate supports • Condition of fittings • Damage to pipe supports Example of Well ‐ Anchored Piping Piping well ‐ secured to pipe ‐ support. Piping, U ‐ bolts and pipe ‐ support are in good condition. 10

Prepared By: Kathleen Mitchell May 9, 2018 Example of Well ‐ Anchored Piping Piping supported by hanger has lateral support as well. Example of Well ‐ Anchored Piping Long span of piping is secured well to supports. U ‐ bolts are placed at a reasonable distance apart. Supports are secured well to the roof. 11

Prepared By: Kathleen Mitchell May 9, 2018 Common Piping Deficiencies • Long stretches of piping with no lateral or vertical support • Pipe ‐ supports or pipeways require lateral support. • Pipe ‐ supports rest unanchored. • Piping or supports show signs of corrosion. Base of pipe ‐ support shows severe corrosion. Examples of Piping Deficiencies Piping requires pipe ‐ clamps to Hanging pipe ‐ supports secure it to supports. are prone to sidesway and require lateral bracing. 12

Prepared By: Kathleen Mitchell May 9, 2018 Example of Piping Deficiency Piping requires more permanent means of support. Example of Piping Deficiency Pipe ‐ support requires anchoring. 13

Prepared By: Kathleen Mitchell May 9, 2018 Example of Piping Deficiency Pipe clamp required to secure piping to support frame. Example of Piping Deficiency Long span of unsecured piping requires pipe ‐ clamps. 14

Prepared By: Kathleen Mitchell May 9, 2018 Seismic Hazards Assessment • Local seismic faults • Liquefaction & settlement • Landslide potential • Tsunamis and seiches Seismic Assessment Report Destination • One copy remains at the facility inside the Risk Management Plan binder. • One copy is included in Risk Management Plan binder submitted to local CUPA and EPA as required. 15

Prepared By: Kathleen Mitchell May 9, 2018 After Seismic Assessment • Review the seismic report. • Follow ‐ up with recommended action items. • Perform regular maintenance to protect against corrosion and deterioration. • Have seismic assessment performed every 5 years. More Information on Seismic Assessments • Guidance for California Accidental Release Prevention (CalARP) Program Seismic Assessments; CalARP Program Seismic Guidance Committee, December 2013; Approved by Region I Local Emergency Planning Committee (LEPC), March 12, 2014 16

Prepared By: Kathleen Mitchell May 9, 2018 Contact Information • Olweny & Associates eolweny@olwenyassociates.com (310) 733 ‐ 7141 • Kathleen Mitchell kmitchell@olwenyassociates.com (714) 356 ‐ 1625 17