CAPECO事故报告：溢出暴露了技术与响应缺陷

The final report of the Chemical Safety Board on Caribbean Petroleum Corporation, published on October 21, 2015, reconstructs an industrial emergency that began in Bayamón on the night of October 23, 2009. Borinquen files it in the September 8, 2026 slot for its institutional and historical value. During the unloading of gasoline from the vessel Cape Bruny, an onshore 5 million-gallon tank overflowed; the aerosol formed a flammable cloud that reached the water treatment area, found ignition, and caused multiple explosions and fires.

The CSB calculated that tank 409 overflowed for about 26 minutes. Its table estimates 193,974 gallons of overfill, nearly 200,000, and describes a vapor cloud covering 107 acres. The explosion and fires damaged 17 of 48 tanks; the fire lasted almost 60 hours according to the executive summary, while the operational report notes 66 hours until it was extinguished. A wave registered at magnitude 2.9 damaged approximately 300 homes and businesses up to 1.25 miles from the site. There were no deaths, and three people suffered minor injuries outside the terminal.

The mechanism was not a single “human error.” The transmitter of tank 409 did not send data to the computerized system, operators relied on hourly readings and manual calculations, and the measuring equipment had a history of failures. The facility lacked an independent high-level alarm and an automatic system to stop or divert the flow. The CSB also found insufficient procedures, poor maintenance, poor lighting, and economic pressures to complete the unloading within the contractual time, conditions that interacted rather than functioning as defenses.

The topography and drainage multiplied the danger. Gasoline sprayed from the vents hit tank components and became aerosolized. Open valves in the dike allowed migration to low points and the used water pond. The CSB did not determine the exact ignition source, but did identify several candidates in the affected area. That precision matters: the report does establish the path and conditions of the cloud, but does not assign a specific spark that the evidence could not pinpoint.

The response also left public lessons. Forty-three federal, territorial, and non-governmental organizations participated, complicating command and communication. CAPECO and local firefighters did not have equipment or training for multiple burning tanks; they had prepared for single-tank scenarios. The report records a federal emergency declaration on October 24, 2009, for Bayamón, Cataño, Guaynabo, San Juan, and Toa Baja, and states that FEMA provided more than $3.4 million to 27 entities for response efforts.

The impact affected housing, the environment, and the economy. Fort Buchanan suffered more than $5 million in damages. Assessments found damage in 232 of 266 homes reviewed in Puente Blanco; the following month, 139 had been repaired and six demolished. The report estimates that approximately 30 million gallons of oil were released through channels, bodies of water, and wetlands into San Juan Bay. PR-22 was closed for three days, and there were temporary air restrictions. These are estimates and findings from the report, not a new appraisal for 2026.

The regulatory conclusion was broad: terminals with atmospheric tanks containing flammable liquids could be exempt from OSHA Process Safety Management and EPA Risk Management Plan requirements. The CSB requested risk assessments that considered nearby communities, redundant safeguards, better overfill standards, testing, and emergency planning. The Board investigates and makes recommendations; it does not impose fines or assign criminal liability. Its report is causal and preventive, not a court judgment.

Caveat: The figures for gallons, damages, duration, FEMA payments, and impacts come from the CSB 2015 report and retain their estimated nature when so stated. Administrative investigation ≠ criminal accusation ≠ conviction. More than $3.4 million provided for response is not a ledger of each disbursement. Final source 2015-10-21; historical paste in slot 2026-09-08.