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Chevron Phillips Chemical Puerto Rico Core

Other (Former) Names of Site: Durand/Learned Plant, Phillips Puerto Rico Core

EPA Identification Number: PRD991291972
Facility Location: Route 710, km 1.3, Las Mareas, Guayama, Puerto Rico 00963
Link to the site map
Facility Contact: Mrs. Paula Mrozek, phone # 832-813-4416
EPA Contact: Zolymar Luna, (787) 977-5844, luna.zolymar@epa.gov
Last Updated: May 2017
Environmental Indicator Status: Human Exposures Under Control [PDF 5.58 MB, 41 pp] has been verified.
Groundwater Contamination Under Control [PDF 125.48 KB, 20 pp] has been verified.

Site Description

The Chevron Phillips Chemical Puerto Rico Core (Chevron or Facility) facility is located on Road 710, km 2.2, Guayama, Puerto Rico. To Facility’s east, PRASA operates a WWTP and Advanced Energy System’s (AES’s) coal-fired power plant operates directly to its west. The Guamaní River (Rio Guamaní) crosses at a distance varying from approximately 1,000 to 3,000 feet from the east side of the Facility.

In August 2008, Chevron announced its cessation of operations and intent to decommission and dismantle all the process units, tanks, wastewater treatment plant (WWTP), and related equipment. The decommissioning and dismantling activities were completed in 2014.

The Facility was constructed in 1966 on land previously used for sugar cane cultivation. Chevron operated as a specialty chemicals production facility from 1966 to 2008. As part of its main operations, Chevron processed naphtha into a variety of refined hydrocarbon products including; benzene, toluene, ethylbenzene, xylenes (BTEX), cyclohexenes, liquid petroleum gas, gasoline, and diesel fuels. Sulfolane was used as part of Chevron’s petroleum refining operations.

In 1986, a Resource Conservation and Recovery Act (RCRA) Facility Assessment (RFA), which was conducted by EPA, revealed that BTEX contamination existed in the soil and groundwater at the facility. This contamination was initially detected in an up gradient well that was part of the groundwater monitoring system for the facility's Hazardous Waste Management Units (HWMUs). Subsequent investigations revealed that BTEX and sulfolane were introduced into the environment through inadvertent releases from the tank storage areas.

Site Responsibility

Cleanup at this Facility is being addressed by the U.S. Environmental Protection Agency (EPA), under the Resource Conservation and Recovery Act (RCRA). However, the Puerto Rico Environmental Quality Board (PREQB) participates with EPA in cleanup decision-making and oversight. In September 1995, EPA and Chevron’s predecessor, Phillips Puerto Rico Core Inc., entered into an Administrative Order on Consent (the Order), Docket No. II RCRA-95-3008(h)-0307. The Order outlines four specific activities to be performed: RCRA Facility Investigation (RFI), Interim Corrective Measures (ICMs), Corrective Measure Study (CMS), and Corrective Measure Implementation (CMI).
Threats and Contaminants

The result of the investigations concluded that contamination was found in soil and groundwater beneath Chevron’s facility. The constituents of concern are BTEX and sulfolane. These contaminants, at varies extents, are migrating off-site to the east, south, and west.


Cleanup Status/Corrective Action

The Facility’s remedial activities are being conducted by Chevron under EPA’s oversight. Pursuant to the Order, Chevron has closed all of its four surface impoundments and is implementing Interim Corrective Measures (ICMs). In 2016, Chevron completed its Corrective Measure Study, which proposed long-term corrective measures directed to address the Facility’s contamination. The proposed/remedy decision documents can be view and/or download from this page, see Decision Documents section, below. In addition, two repositories have been designated for this project. Interested persons, may review the decision documents at the repositories identified below.


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