NPL-U32-2-11-R6 HRS DOCUMENTATION RECORD REVIEW COVER SHEET Name of Site: Talen’s Landing Bulk Plant CONTACT PERSONS Site Investigation: Brenda Nixon Cook, EPA Region 6 (Name) Documentation Record: Brenda Nixon Cook, EPA Region 6 (Name) (214) 665-7436 (Telephone) (214) 665-7436 (Telephone) Site Description and History: Talen’s Landing Bulk Plant (TLBP) is an inactive and abandoned crude oil refinery and bulk storage facility located on the north bank of the Intracoastal Waterway (ICW), near mile marker 193, twenty-three miles northeast of Grand Cheniere, Cameron Parish, Louisiana (Fig. 1; Fig. 2)(Ref. 5, p. 3; Ref. 11, p. 9). The site is comprised of two 5-acre tracts of land, referred to as the TLBP East and West facilities (Fig. 3)(Ref. 11, p. 9). The TLBP East Facility is bordered to the north and west by the ICW (north and barge slips), and by wooded wetland areas to the south and east (Fig. 3A)(Ref. 11, p. 9; Ref. 14, p. 3; Ref. 18, p. 3). The TLBP West Facility is bordered by a ditch, an unnamed road, and wooded wetland areas to the north and west, by Talen’s Marine and Fuel (TMF) to the south, and by an open field/parking lot to the east (Fig. 1; Fig. 3B)(Ref. 11, p. 9; Ref. 13, pp. 41, 47, Photograph Nos. 702, 714; Ref. 14, p. 3; Ref. 18, p. 3). TMF is an active refueling facility and dock (Ref. 11, p. 9; Ref. 14, pp. 4-5). The area surrounding the site is mainly undeveloped and utilized for hunting and cattle grazing (Ref. 11, p. 10; Ref. 15, p. 1). The nearest resident or regularly occupied building is the resident manager of the Jupiter Plant located approximately 1,200 feet northeast of the TLBP West Facility (Fig. 1)(Ref. 11, p. 10; Ref. 14, p. 4). The TLBP property was owned by Mallard Bay Landing, Inc. Ms. Guillot and Ms. Meaus, the principals of the corporation, received the property from their father, Charles Talen, in the mid1970s. In the late 1970s, Ms. Guillot leased the property to Mallard Resources, Inc. (MRI) (Ref. 9, p. 3). In early 1980, the newly constructed facility began its operation as a crude oil refinery. The plant was permitted to accept a maximum of 5,000 barrels of mixed crude oil per day. The mixed crude oil was refined to produce naphtha, diesel fuel, and No. 6 fuel oil. The facility 1 continued its refining operations until August 1983. In early 1984, MRI filed for Chapter 11 bankruptcy. The facility was sold to Cameron Resources, Inc. (CRI), contingent upon obtaining certification to operate the plant after renovations and repairs were made. In August 1985, CRI began crude oil refining operations at the facility. In early 1987, CRI began its bankruptcy proceedings (Ref. 6, p. 8; Ref. 11, pp. 10-11). In April 1987, Louisiana Department of Environmental Quality-Hazardous Waste Division (LDEQ-HWD) performed a general inspection based on information received that CRI had undergone bankruptcy and that the property was closed. The inspection revealed that the property was not in operation and negotiations for sale of the facility were underway (Ref. 9, p. 4). According to the LDEQ-HWD inspection report, CRI allegedly accepted hazardous waste fuels for which they were not permitted. The report also indicated that the facility had received styrene, which it tried to process, resulting in serious problems within the refinery and ultimately leading to its closure (Ref. 6, p. 8; Ref. 7, p. 1; Ref. 8, p. 1; Ref. 9, p. 4; Ref. 11, p. 11). No documentation exists in state records indicating that CRI sold the facility after the bankruptcy proceedings (Ref. 11, p. 11). The facility was actively monitored by the Louisiana Department of Natural Resources (LDNR) and LDEQ during its operational years (Ref. 11, pp. 12-13). Based on the information obtained during the 1993 LDEQ Phase I Site Assessment (SA) inspection, LDEQ referred the site to the United States Environmental Protection Agency (EPA) in June 1993 (Ref. 6, p. 1; Ref. 11, p. 13). The EPA-Response and Prevention Branch (RPB) tasked the Superfund Technical Assessment and Response Team (START) to conduct a removal assessment at the site (Ref. 9, pp. 1-23; Ref. 11, p. 13). START conducted site inventory, sample collection, and hazard categorization of tanks and drums (Ref. 9, p. 8; Ref. 13, pp. 39-41, Photograph Nos. 633-701). Chemical analyses of drum samples revealed elevated concentrations of benzene, ethylbenzene, styrene, toluene, xylenes (total), 2-methylnaphthalene, and naphthalene (Ref. 9, pp. 21-22, Ref. 26, pp. 10, 23-24, 33-34). In November 1998, removal support activities began at the site. From January to March 1999, approximately 866,304 gallons of oil/waste material from on-site tanks was transported off site for disposal. However, some of the polymerized waste could not be removed and 152,392 gallons of oil/waste material remain stored in four on-site tanks (Ref. 11, p. 13; Ref. 28, p. 1). Soil, sediment, and ground water samples were collected during the 1999 START Site Inspection (SI) for source waste characterization (Ref. 11, pp. 28-31). Chemical analyses of the tank waste sample revealed elevated concentrations of benzene, ethylbenzene, styrene, toluene, xylenes (total), 2-methylnaphthalene, naphthalene, arsenic, barium, chromium, cobalt, copper, lead, manganese, mercury, nickel, vanadium, and zinc (Ref. 11, pp. 58, 65; Ref. 12, pp. 50, 124, 214-215). Chemical analyses of wetland sediment samples collected from the second overland flow segment (OFS No. 2) revealed elevated concentrations of arsenic, barium, copper, manganese, mercury, nickel, vanadium, and zinc. No organic compounds were present in the samples at concentrations that met the criteria for an observed release (Ref. 11, pp. 62, 87; Ref. 12, pp. 23-26, 114-117, 194-201). A total of 1 mile of contaminated wetland frontage along the OFS No. 2 was identified by chemical analysis during the 1999 START SI (Fig. 7; Fig 8)(Ref. 11, pp. 98-101; Ref. 15, pp. 2-3). 2 Pathways, Components, or Threats Not Evaluated 1) Ground Water Pathway: An observed release has been documented in a rig supply well at the Jupiter Plant; however, there are no target receptors associated with this well. An observed release was not documented from the samples collected from the other wells. Due to the lack of target receptors, evaluation of this pathway will not significantly affect the site score. 2) Surface Water Pathway: Ground Water to Surface Water Migration Component: This component was not scored because an observed release was documented for the overland flow/flood component. 3) Air Migration Pathway: Air samples were not collected during the SI field activities; therefore, an observed release to the air migration pathway cannot be documented. There are a limited number of targets; therefore, the pathway would result in a minimal score. Because the value of this pathway will not significantly affect the site score, the pathway was not scored. 4) Soil Exposure Pathway: Due to limited residents and nearby population, the pathway would result in a minimal score. Because evaluation of this pathway will not significantly affect the site score, it has not been scored. 3 HRS DOCUMENTATION RECORD Name of Site: Talen’s Landing Bulk Plant CERCLIS ID Number: LA0000187518 Site Spill Identifier Number (SSID): DB EPA Region: 6 Street Address of Site: 0.6 mile of Cameron Parish Road (PR) 109 in Grand Cheniere (Fig. 1) County and State: Cameron Parish, LA General Location in the State: The site is located northeast of the City of Grand Cheniere in the southwest portion of the state (Fig. 2). Topographic Map: Date Prepared: February 16, 2000 Mallard Bay Quadrangle, LA, 1979 (Ref. 5, p. 3) Latitude: 29° 56' 2.45" N Longitude: 92° 39' 19.69" W Scores Air Pathway Ground Water Pathway Soil Exposure Pathway Surface Water Pathway HRS SITE SCORE 4 Not Scored Not Scored Not Scored 97.09 48.54 Topo worksheet A copy of this worksheet is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 5 NOTE TO THE READER Tracking numbers are assigned by the region to every page of every reference. The tracking number consists of the reference number followed by the page number within that reference. A tracking number will have a two-digit number followed by the sequential number (for example, 05 001; 05 002). The following rules were used when citing references in the HRS (Hazard Ranking System) package. 1. The tracking numbers are cited for all references. 2. Hazardous substances are listed by how they appear in the Superfund Chemical Data Matrix (SCDM). 3. Significant figures: Calculations are reported to two significant figures to the right of the decimal place. 4. Abbreviations/Conventions used to identify references and citations: Fig. Figure No. Number Reference Ref. Section Sec. Single Page p. Multiple Pages pp. “;” Next Reference. () Selected acronyms. 6. List of Figures Figure 1 Figure 2 Figure 3 Figure 3A Figure 3B Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 7. Site Aliases Facility Location Map Facility Location Within State Map Facility Sketch East Facility Sketch West Facility Sketch Soil and Sediment Background Sample Location Map Source Characterization Sample Location Map Surface Water Sediment Sample Location Map Overland Flow Segment No. 2 Sample Locations Overland Flow Segment No. 2 Wetland Frontage Determination CERCLIS No. LAD000631697 Mallard Resources, Inc. (MRI) Cameron Resources, Inc. (CRI) Cameron Refinery 6 ACRONYMS ASTs BGS BPSD CERLIS CRI EPA hazcat HWD HRS ICW LDEQ LDNR LDWF MRI NPDES NGV NWI OFS PPE PR PVC RPB RCRA START SA SI SCDM SQLs SSID TAL TCL TDL TLBP TMF TSD Aboveground Storage Tanks Below Ground Surface Barrels Per Stream Day Comprehensive Environmental Response, Compensation, and Liability Act Cameron Resources, Inc. Environmental Protection Agency Hazardous Categorization Hazardous Waste Division Hazard Ranking System Intracoastal Waterway Louisiana Department of Environmental Quality Louisiana Department of Natural Resources Louisiana Department of Wildlife and Fisheries Mallard Resources, Inc. National Pollutant Discharge Elimination System National Geodetic Vertical Datum National Wetlands Inventory Overland Flow Segment Probable Point of Entry Parish Road Polyvinyl Chloride Response and Prevention Branch Resource Conservation and Recovery Act of 1976 Superfund Technical Assessment and Response Team Site Assessment Site Inspection Superfund Chemical Data Matrix Sample Quantitation Limits Site Spill Identifier Number Target Analyte List Target Compound List Target Distance Limit Talen’s Landing Bulk Plant Talen’s Marine and Fuel Treatment/Storage/Disposal 7 Figure 1 Facility Location Map A copy of the Facility Location Map, Figure 1, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 8 Figure 2 Facility Location in State A copy of the Facility Location in the State, Figure 2, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 9 Figure 3 Facility Sketch A copy of the Facility Sketch, Figure 3, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 10 Figure 3A East Facility Sketch A copy of the East Facility Sketch, Figure 3A, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 11 Figure 3B West Facility Sketch A copy of the West Facility Sketch, Figure 3B, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 12 Figure 4 Soil and Sediment Background Sample Location Map A copy of the Soil And Sediment Background Sample Location Map, Figure 4, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 13 Figure 5 Source Characterization Sample Location Map A copy of the Source Characterization Sample Location Map, Figure 5, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 14 Figure 6 Surface Water Sediment Sample Location Map A copy of the Surface Water Sediment Sample Location Map, Figure 6, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 15 Figure 7 Overland Flow Segment No. 2 Sample Locations A copy of the Overland Flow Segment No. 2 Sample Locations Map, Figure 7, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 16 Figure 8 Overland Flow Segment No. 2 Wetland Frontage Determination A copy of the Overland Flow Segment No. 2 Wetland Frontage Determination Map, Figure 8, is available at the EPA Headquarters Superfund Docket: U.S. CERCLA Docket Office Crystal Gateway #1, 1st Floor 1235 Jefferson Davis Highway Arlington, VA 22202 Telephone: (703) 603-8917 E-Mail: [email protected] 17 WORKSHEET FOR COMPUTING HRS SITE SCORE 1. Ground Water Migration Pathway Score (Sgw) (from Table 3-1, line 13) 2a. Surface Water Overland/Flood Migration Component (from Table 4-1, line 30) 2b. Ground Water to Surface Water Migration Component (from Table 4-25, line 28) 2c. Surface Water Migration Pathway Score (Ssw) Enter the larger of lines 2a and 2b as the pathway score. S S2 NS NS 97.09 9,426 NS NS 97.09 9,426 3. Soil Exposure Pathway Score (Ss) (from Table 5-1, line 22) NS NS 4. Air Migration Pathway Score (Sa) (from Table 6-1, line 12) NS NS 5. Total of Sgw2 + Ssw2 + Ss2 + Sa2 9,426 6. HRS Site Score Divide the value on line 5 by 4 and take the square root 48.54 NS = Not Scored 18 TABLE 4-1 SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE SHEET Factor Categories and Factors Maximum Value Value Assigned DRINKING WATER THREAT Likelihood of Release 1. 2. Observed Release Potential to Release by Overland Flow: 2a. Containment 2b. Runoff 2c. 550 10 25 25 Distance to Surface Water 2d. 3. 4. 5. Potential to Release by Overland Flow (Lines 2a x [2b + 2c]) Potential to Release by Flood: 3a. Containment (Flood) 3b. Flood Frequency 3c. Potential to Release by Flood (Lines 3a x 3b) Potential to Release (Lines 2d + 3c, subject to a maximum of 500) Likelihood to Release (Higher of Lines 1 and 4) 500 10 50 500 500 550 NS * * 100 NS Waste Characteristics 6. 7. 8. Toxicity/Persistence Hazardous Waste Quantity Waste Characteristics Targets 9. Nearest Intake 10. Population: 10a. Level I Concentrations 10b. Level II Concentrations 10c. Potential Contamination 10d. Population (Lines 10a + 10b + 10c) 11. Resources 12. Targets (Lines 9 + 10d + 11) * ** *** 50 ** ** ** ** 5 ** Maximum value applies to waste characteristics category Maximum value not applicable Do not round to the nearest integer 19 NS TABLE 4-1 (Continued) SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE SHEET Factor Categories and Factors Maximum Value Value Assigned DRINKING WATER THREAT (Concluded) Drinking Water Threat Score 13. Drinking Water Threat Score ([Lines 5 x 8 x 12]/82,500, subject to a maximum of 100) 100 NS 550 550 HUMAN FOOD CHAIN THREAT Likelihood of Release 14. Likelihood of Release (Same value as Line 5) Waste Characteristics 15. Toxicity/Persistence/Bioaccumulation 16. Hazardous Waste Quantity 17. Waste Characteristics * * 1,000 2 × 108 100 320 50 20 ** ** ** 0 0 3 x 10-7 ** 3 x 10-7 Targets 18. Food Chain Individual 19. Population: 19a. Level I Concentrations 19b. Level II Concentrations 19c. Potential Human Food Chain Contamination 19d. Population (Lines 19a + 19b + 19c) 20. Targets (Value from Lines 18 + 19d) ** 20.0000003 Human Food Chain Threat Score 21. Human Food Chain Threat Score ([Lines 14 x 17 x 20]/82,500, subject to a maximum of 100) * ** *** 100 Maximum value applies to waste characteristics category Maximum value not applicable Do not round to the nearest integer 20 42.67 TABLE 4-1 (Concluded) SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE SHEET Factor Categories and Factors Maximum Value Value Assigned ENVIRONMENTAL THREAT Likelihood of Release 22. Likelihood of Release (Same value as Line 5) 550 550 Waste Characteristics 23. Ecosystem Toxicity/Persistence/ Bioaccumulation 24. Hazardous Waste Quantity 25. Waste Characteristics * * 1,000 2 × 108 100 320 Targets 26. Sensitive Environments: 26a. Level I Concentrations 26b. Level II Concentrations 26c. Potential Contamination 26d. Sensitive Environments (Lines 26a + 26b + 26c) 27. Targets (Value from Line 26d) ** ** ** 0 25 0.50975 ** 25.50975 ** 25.50975 Environmental Threat Score 28. Environmental Threat Score ([Lines 22 x 25 x 27]/82,500 subject to a maximum of 60) 60 54.42 SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE FOR A WATERSHED *** 29. WATERSHED SCORE (Lines 13 + 21 + 28, subject to a maximum of 100) 100 97.09 SURFACE WATER OVERLAND/FLOOD MIGRATION COMPONENT SCORE *** 30. Component Score (Sof) (Highest score from Line 29 for all watersheds evaluated, subject to a maximum of 100) * ** *** 100 Maximum value applies to waste characteristics category Maximum value not applicable Do not round to the nearest integer 21 97.09 REFERENCES Reference Number Description of the Reference 1 U.S. EPA Hazard Ranking System (HRS); Final Rule. pp. 51532-51667. December 14, 1990. Total Pages: 1 2 Superfund Chemical Data Matrix. Appendix B. June 1996. Excerpt Pages: 13 3 U.S. Environmental Protection Agency Office of Solid Waste and Emergency Response. Hazard Ranking System Guidance Manual. Publication 9345.1-07, PB92-963377, EPA 540-R-92-026. November 1992. Excerpt Pages: 5 4 Using Qualified Data to Document an Observed Release and Observed Contamination. U.S. EPA, Office of Emergency and Remedial Response, Publication 9285.7-14FS. November 1996. Total Pages: 18 5 U.S.G.S. 7.5-Minute Series Topographic Maps. Lake Misere, LA, 1980; Latania Lake, LA, 1980; Mallard Bay, LA, 1979; Latanier Bayou, LA, 1979; Forked Island NW, LA, 1979; Grand Cheniere, LA, 1980; Catfish Lake, LA, 1980; Collicon Lake, LA, 1979; Lake Le Bleu, LA, 1979; Jacks Point Island, LA, 1979; Cow Island, LA, 1979; Deep Lake, LA, 1979; Floating Turf Bayou, LA, 1979. Site Location, 1-Mile Facility Radius, and 15-Mile Target Distance Limit Arc added by Ecology and Environment, Inc. Total Pages: 13 6 Site Discovery. Talen’s Landing Bulk Plant Site, Cameron Parish, Louisiana. State Site ID# SLA00888. From: Tim Knight, State of Louisiana Department of Environmental Quality, Inactive and Abandoned Sites Division. To: LaDonna Walker, U.S. Environmental Protection Agency. June 16, 1993. Total Pages: 9 7 Field Services Site Status Update Form. Talen’s Landing Bulk Plant. IASD ID# 00888. Prepared by Keith Horn, State of Louisiana Department of Environmental Quality, Inactive and Abandoned Sites Division. May 28, 1996. Total Pages: 1 8 Field Services Site Status Update Form. Talen’s Landing Bulk Plant. IASD ID# 00888. Prepared by Keith Horn, State of Louisiana Department of Environmental Quality, Inactive and Abandoned Sites Division. April 10, 1997. Total Pages: 2 9 Removal Assessment Report for Talen’s Landing Bulk Plant, Grand Cheniere, Cameron Parish, Louisiana. LA0000187518. Prepared for the U.S. Environmental Protection Agency by Ecology and Environment, Inc. December 19, 1996. Excerpt Pages: 23 10 Site Inspection Work Plan for Talen’s Landing Bulk Plant, Grand Cheniere, Cameron Parish, Louisiana. LA0000187518. Prepared for the U.S. Environmental Protection Agency by Ecology and Environment, Inc. March 16, 1999. Total Pages: 33 22 40 CFR, Part 300 11 Site Inspection Report for Talen’s Landing Bulk Plant, Grand Cheniere, Cameron Parish, Louisiana. LA0000187518. Prepared for the U.S. Environmental Protection Agency by Ecology and Environment, Inc. September 15, 1999. Total Pages: 110 12 Data Quality Assurance Review, Laboratory Analysis Data Sheets, Chain of Custody Record, and SQL Calculations. Talen’s Landing Bulk Plant, Case No. 6S221, SDG No. 99047, Pace Analytical Services, Inc. Prepared by Alma Canning and Maggie Carson, Ecology and Environment, Inc. May 19, 1999. Total Pages: 304 13 Photograph Documentation. Talen’s Landing Bulk Plant, Removal and Site Inspection Field Photographs. Ecology and Environment, Inc. June 24, 1997 to August 26, 1999. Total Pages: 62 14 Talen’s Landing Bulk Plant Site Inspection Logbook, TDD No. S06-99-01-0007, PAN 076601SIXX. Logbook No. 1. Ecology and Environment, Inc. Total Pages: 36 15 Memorandum. To: Talen’s Landing Bulk Plant (TLBP) Site File. Subject: Field Observations During the Site Inspection Conducted in March 1999. From: Maxie Lee, Jr., and David Bordelon, Ecology and Environment, Inc. September 7, 1999. Total Pages: 3 16 Record of Communication. Subject: Talen’s Landing Bulk Plant. To: Bobby Reed, LDWF-Lake Charles. From: John Mueller, Ecology and Environment, Inc. February 2, 1999. Total Pages: 5 17 Soil Survey of Cameron Parish, Louisiana. United States Department of Agriculture, Soil Conservation Service in cooperation with the Louisiana Agriculture Experiment Station and the Louisiana Soil and Water Committee. Issued April 1995. Excerpt Pages: 5 18 National Wetlands Inventory Maps. Lake Misere, LA, 1992; Latania Lake, LA, 1992; Mallard Bay, LA, 1992; Latanier Bayou, LA, 1992; Forked Island, NW, LA, 1992; Grand Chenier, LA, 1992; Catfish Lake, LA, 1992; Collicon Lake, LA, 1992; Lake Le Bleu, LA, 1992; Cow Island, LA, 1992; Deep Lake, LA, 1992, Floating Turf Bayou, LA, 1992; Jacks Point Island, LA, 1992; U.S. Department of the Interior Fish and Wildlife Service. Total Pages: 13 19 Record of Communication. Subject: Commercial Fishing Within 15-mile TDL of TLBP. To: Bobby Reed, LDWF-District 5. From: Jeff Wright, Ecology and Environment, Inc. September 13, 1999. Total Pages: 1 20 Letter. Subject: Oil Treatment Facility. To: Muriel Bouzinac, Ecology and Environment, Inc. From: Gary Lester, Natural Heritage Program, State of Louisiana Department of Wildlife and Fisheries. February 11, 1999. Total Pages: 1 21 Record of Communication. Subject: Surface Drinking Water Intakes within 15-mile Radius of Talen’s Site. From: Michael Dowty, Engineering Division - H&H Safe 23 Drinking Water Program (Alexandria). To: Muriel Bouzinac, Ecology and Environment, Inc. February 3, 1999. Total Pages: 1 22 Record of Communication. Subject: Habitat for Paddle Fish around Former Talen’s Landing Bulk. To: Bobby Reed, LDWF. From: Muriel Bouzinac, Ecology and Environment, Inc. August 25, 1999. Total Pages: 1 23 Memorandum. Subject: Endangered Species - Talen’s Landing (LA0000187518). To: Charles Fisher, On-Scene Coordinator, U.S. Environmental Protection Agency. F rom: William Kirchner, Professional Wetland Scientist, U.S. Environmental Protection Agency. July 19, 1998. Total Pages: 2 24 Interoffice Memorandum. Subject: Quantitation Limit Calculation. To: Jody Shires, Ecology and Environment, Inc. From: David Anderson, Ecology and Environment, Inc. July 17, 1998. Total Pages: 5 25 Statement of Work for Sample Analysis (Organic and Inorganic), Multi-media, Multiconcentration. Prepared by Ecology and Environment, Inc. Technical Assistance Team, EPA Region 6. June 1995. Total Pages: 5 26 Data Quality Assurance Review. Talen’s Landing Bulk Plant. CERCLIS LA0000187518. Case No. 117183, SDG No. 97114. Prepared by William Perry, Ecology and Environment, Inc. December 19, 1997. Total Pages: 35 27 Talen’s Landing Removal Logbooks 1 and 2. TDD No. S06-96-07-0013, PAN 017401SFXX. Ecology and Environment, Inc. August 13, 1996 to August 19, 1997 (Logbook 1), August 10, 1997 to August 14, 1997 (Logbook 2). Total Pages: 77 28 Letter. Subject: Transportation and Disposal of Remaining Material at Talen’s Landing Bulk Plant. To: Charles Fisher, Environmental Protection Agency. From: Jon Howley, CET Environmental Services, Inc. April 9, 1999. Total Pages: 1 29 Rainfall Frequency Atlas of the United States for Durations from 30 Minutes to 24 Hours and Return Periods from 1 to 100 Years. Technical Paper No. 40. David M. Hershfield, U.S. Department of Agriculture. May 1961. Total Pages: 2 30 National Pollutant Discharge Elimination System. Mallard Resources, Inc. Louisiana Department of Wildlife and Fisheries, Division of Water Pollution Control. Received July 21, 1980. Total Pages: 3 31 Fact Sheet. Subject: Proposed NPDES Permit for Mallard Resources, Inc. United States Environmental Protection Agency. Not Dated. Total Pages: 4 32 Letter. Re: LAD00036197. To: Tome McCrary, Mallard Resources, Inc. From: Tom Patterson, Louisiana Department of Natural Resources Hazardous Waste Management Division. February 12, 1982. Total Pages: 2 24 33 Citizens’ Complaint Record. Assigned to: Victor Montelaro, Louisiana Department of Natural Resources Hazardous Waste Regulation. Complaint Received: April 13, 1982. Total Pages: 1 34 Letter. Subject: Mallard Resources, Inc. To: Dale Givens, Mallard Resources, Inc. From: Richard Goudeau, Environmental Affairs, LDNR Water Pollution Control Division. April 22, 1982. Total Pages: 2 35 RCRA Inspection. Mallard Resources, Inc. LAD000631697. January 18, 1983. Total Pages: 2 36 General Inspection. Mallard Resources. Louisiana Department of Environmental Quality, Office of Solid and Hazardous Waste Division. Inspection Date: April 13, 1984. Total Pages: 1 37 Letter. Subject: Compliance to Notice Issued June 10, 1985. LAD000631697. To: Timothy Linscomb, Cameron Refinery. From: John Koury, Louisiana Department of Environmental Quality, Office of Solid and Hazardous Waste. June 20, 1985. Total Pages: 3 38 Interoffice Correspondence. Subject: Cameron Refinery (LAD000631697). To: Tom Patterson, Enforcement Program Management, Louisiana Department of Environmental Quality. From: Victor Montelaro, Southwest Region, Enforcement Section, Louisiana Department of Environmental Quality. May 11, 1987. Total Pages: 1 39 Crude Oil Basic Excerpt Pages Handout. Refer to References. October 1995. Total Pages: 14 40 Shreve’s Chemical Process Industries, Fifth Edition. George Austin. McGraw-Hill Book Company. 1984. Total Pages: 3 41 Occupational Health Guidelines for Chemical Hazards. Mackinson, Stricoff, and Partridge. U.S. Department of Health and Human Services and U.S. Department of Labor. Occupational Safety and Health Administration. DHHS (NIOSH). Publication No. 81-123. January 1981. Total Pages: 18 42 Chemical Hazards of the Workplace. Company. 1978. Total Pages: 6 43 Sector Notebook Project. Petroleum Refining. US Environmental Protection Agency. SIC 2911. September 1995. Excerpt Pages: 9 44 Mercury in Petroleum. Reprinted from Fuel Processing Technology 63 (2000) 1-27. S. Mark Wilhelm, Mercury Technology Services and Nicolas Bloom, Frontier 25 Proctor and Hughes. J.B. Lippincott Geosciences. September 30, 1999. Excerpt Pages: 6 45 U.S. Environmetnal Protection Agency Office of General Counsel. Applicability of CERCLA to Contamination of Ground Water by Diesel Oil. December 1982. Total Pages 4. 46 U.S. Environmental Protection Agency. Federal Register 40 CFR Parts 117 and 302. Notification Requirements; Reportable Quantity Adjustments. Final Rule. April 1985. Total Pages 1. 47 U.S. Environmental Protection Agency Office of Solid Waste and Emergency Response. Scope of the CERCLA Petroleum Exclusion under Sections 101(14) and 104(A)(2). Publication PB91-139550. July 1987. Total Pages: 7. 48 US v. Western Processing. United States District Court for the Western District of Washington. March 22, 1999. Total Pages: 30 49 Record of Communication. Subject: Jupiter Plant Operations. From: Andrea West, START-Dallas. To: Cindy Nunez, Spirit 76 Energy Plant. April 10, 2000. Total Pages: 1 50 AutoCAD® 2000 User’s Guide. Autodesk, Inc. 00120-010000-5010. February 5, 1999. Total Pages: 2 26 SD-Source Characterization Source No.: 1 SOURCE DESCRIPTION 2.2 SOURCE CHARACTERIZATION 2.2.1 Source Identification The following information corresponds to the first source identified for this documentation record. Number of the source : Source No. 1 Name and description of the source: TLBP East Facility Tanks T01, T02, T03, and T07 During the August 1997 START removal assessment sampling mission, START inventoried 34 aboveground storage tanks (ASTs), three underground oil-water separators, and two hoppers at the facility (Fig. 3)(Ref. 9, p. 8). In November 1998, removal support activities began at the site. From January to March 1999, approximately 866,304 gallons of material collected from 30 tanks was transported off site for disposal (Ref. 11, p. 13). At the time of the 1999 SI, approximately 152,392 gallons of material remained at the TLBP East Facility in four ASTs: T01, T02, T03, and T07 (Ref. 11, p. 13). The remaining material is a thick, oily-sludge polymerized waste that could not be removed during the removal (Ref. 11, pp. 13-14; Ref. 28, p. 1). Chemical analyses of representative tank waste sample TLE-WS1-RG from T01 revealed elevated concentrations of benzene, ethylbenzene, styrene, toluene, xylenes (total), 2methylnaphthalene, naphthalene, arsenic, barium, chromium, copper, lead, manganese, mercury, nickel, vanadium, and zinc equal to or greater than their corresponding sample quantitation limits (SQLs) (Fig. 5)(Ref. 10, p. 25; Ref. 11, pp. 28, 58, 65; Ref. 12, pp. 50, 124, 214-215; Ref. 14, p. 22). The four ASTs are surrounded by a secondary earthen containment berm (Ref. 11, p. 14; Ref. 13, pp. 6, 8-10, 18, Photograph Nos. 111, 116-118, 120, 212). There is no historical or visual evidence that the containment system was lined. The earthen berm is heavily vegetated with no evidence of maintenance. During the 1999 START SI field activities, a breech/cut in the northwestern side of the earthen berm was noted, but no liquids were observed escaping. However, standing water was present in the southeastern portion of the berm area and material was observed seeping through the south side of the berm where wetlands are identified. There was approximately 2 feet of freeboard remaining within the containment area (Fig. 3A)(Ref. 9, p. 6; Ref. 11, p. 14; Ref. 13, pp. 11, 17, 20-21, 28, Photograph Nos. 122, 210, 217-218, 310-312; p. 53, Photograph No. 106; Ref. 15, pp. 2-3). CLocation of the source, with reference to a map of the site : Source No. 1 is located in the tank battery of the East Facility of the TLBP site (Fig. 3; Fig. 27 SD-Source Characterization Source No.: 1 3A)(Ref. 11, p. 14). The TLBP East Facility is a 5-acre area bordered on the west by the ICW (north and south barge slips), by wooded wetlands to the south and east, and by an unnamed road to the north. A dirt road runs along the east boundary of the facility. The tank battery consists of seven vertically oriented ASTs and two horizontally oriented ASTs, all of which are contained within an earthen berm. The East Facility has a locked gate which is bound to an 8foot-high, chain-link fence. It can be accessed by PR 109 (South Talen’s Landing Road)(Ref. 9, pp. 5-6; Ref. 11, p. 9; Ref. 13, p. 50, Photograph No. 719). CSource Type for HRS evaluation purposes: Tank CContainment Gas release to air: The air migration pathway was not scored; therefore, gas release to air containment was not evaluated. Particulate release to air: The air migration pathway was not scored; therefore, particulate containment was not evaluated. Release to ground water: The ground water migration pathway was not scored; therefore, ground water containment was not evaluated. Release via overland migration and/or floo d : The four ASTs are surrounded by a secondary earthen containment berm (Ref. 11, p. 14; Ref. 13, pp. 6, 8-10, 18, Photograph Nos. 111, 116-118, 120, 212). There is no historical or visual evidence that the containment system was lined. The earthen berm is heavily vegetated with no evidence of maintenance. During the 1999 START SI field activities, a breech/cut in the northwestern side of the earthen berm was noted, but no liquids were observed escaping. However, standing water was present in the southeastern portion of the berm area and material was observed seeping through the south side of the berm where wetlands are identified (Fig. 3A)(Ref. 9, p. 6; Ref. 11, p. 14; Ref. 15, pp. 2-3). Analytical results of sediment samples collected from these wetlands revealed elevated concentrations of arsenic, barium, copper, manganese, mercury, nickel, vanadium, and zinc that met the observed release criteria. See Sec. 4.1.2.1 of this documentation record for additional analytical evidence. This source receives a containment value greater than (>) 0 (Ref. 1, Table 4-2). 2.2.2 Hazardous Substances Associated with a Source The 17 substances listed in the following pages were present in the waste sample collected from T01 during the 1999 START SI. The sample contained concentrations of hazardous substances equal to or greater than their corresponding SQLs (Ref. 11, pp. 58, 65; Ref. 12, pp. 50, 124, 214-215). 28 SD-Source Characterization Source No.: 1 EVIDENCE TABLE: 1999 START SI The following tables show the hazardous substances detected in the waste sample collected during the 1999 START SI sampling mission. The sample contained concentrations of hazardous substances equal to or greater than their corresponding SQLs (Ref. 11, pp. 58, 65; Ref. 12, pp. 50, 124, 214-215). The sample was analyzed for Target Compound List (TCL) volatiles, TCL semivolatiles, and Target Analyte List (TAL) metals (Ref. 12, p. 290). Hazardous Substance Evidence Reference TCL Volatiles Benzene 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 124 Ethylbenzene 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 124 Styrene 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 124 Toluene 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 124 Xylenes (total) 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 124 2-Methylnaphthalene 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, pp. 214215 Naphthalene 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, pp. 214215 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 TCL Semivolatiles TAL Metals Arsenic 29 SD-Source Characterization Source No.: 1 Hazardous Substance Evidence Reference Barium 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 Chromium 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 Copper 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 Lead 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 Manganese 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 Mercury 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 Nickel 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 Vanadium 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 Zinc 1999 START SI Report Refer to Source No. 1 Source Characterization Tables Section 2.2.2 Ref. 11, p. 65; Ref. 12, p. 50 30 SD-Source Characterization Source No.: 1 Evidence Sample - TLBP East Facility Tanks 1999 START SI Report Sample No. TLE-WS1-RG (mg/kg) Hazardous Substance Conc. SQL Benzene 1,420 100 Ethylbenzene 2,040 100 Styrene 3,010 100 Toluene 4,600 100 Xylenes (total) 12,400 100 2-Methylnaphthalene 724 500 Naphthalene 954 500 Arsenic 14.40 1 Barium 225 20 Chromium 185 1 59.20 2.50 327 JK (227.08) 0.30 Manganese 146 1.50 Mercury 4.47 0.10 Nickel 16.20 4 Vanadium 17.90 5 647 2 TCL Volatiles TCL Semivolatiles TAL Metals Copper Lead Zinc REFERENCES Form I’s Ref. 12, pp. 50, 124, 214-215 Chain of Custody Ref. 12, p. 290 Data Evaluation Ref. 12, pp. 1-10, 96-111, 184-189 SQLs Ref. 12, pp. 50, 124, 214-215 Other Supporting References Fig. 5 Notes and Qualifiers: Conc: Concentration mg/kg: Milligrams per kilogram SQL: Sample Quantitation Limit Underlined numbers denote that concentration meets observed contamination. Adjusted Factors (Ref. 4, pp. 8, 18, Table 4) Lead : 1.44 31 SD-Source Characterization Source No.: 1 Sample Source Characterization for Source #1 Hazardous Substances Associated with a Source Available to Pathway Surface Water (SW) Air Pathway Soil Exposure Gas Particulate Ground Water (GW) Benzene NS NS NS Y NS NS NS Ethylbenzene NS NS NS Y NS NS NS Styrene NS NS NS Y NS NS NS Toluene NS NS NS Y NS NS NS Xylenes (total) NS NS NS Y NS NS NS 2-Methylnaphthalene NS NS NS Y NS NS NS Naphthalene NS NS NS Y NS NS NS Arsenic NS NS NS Y NS NS NS Barium NS NS NS Y NS NS NS Chromium NS NS NS Y NS NS NS Copper NS NS NS Y NS NS NS Lead NS NS NS Y NS NS NS Manganese NS NS NS Y NS NS NS Mercury NS NS NS Y NS NS NS Nickel NS NS NS Y NS NS NS Vanadium NS NS NS Y NS NS NS Zinc NS NS NS Y NS NS NS Hazardous Substances Overland/ Flood GW to SW Resident Nearby TCL Volatiles TCL Semivolatiles TAL Metals Key: NS = Not Scored Y = Yes 32 SD-Source Characterization Source No.: 1 2.2.3 Hazardous Substances Available to a Pathway Because containment for this source is greater than zero, the following substances associated with the source can migrate via the Surface Water Pathway (Ref. 1, Sec. 4.1.2.1.2.2.1): CBenzene CEthylbenzene CStyrene CToluene CXylenes (total) C2-Methylnaphthalene CNaphthalene CArsenic CBarium CChromium CCopper CLead CManganese CMercury CNickel CVanadium CZinc Furthermore, sediment samples collected at the Probable Point of Entry No. 3 (PPE 3) and from the on-site wetlands confirm that the following hazardous substances have already migrated to the Surface Water Migration Pathway (see Sec. 4.1.2.1 of this Documentation Record) (Ref. 11, p. 87; Ref. 12, pp. 23-25, 114-117, 194-201): CArsenic CBarium CCopper CManganese CMercury CNickel CVanadium CZinc 2.3 LIKELIHOOD OF RELEASE Refer to Sec. 4.1.2.1 of this documentation record for specific information related to the Likelihood of Release to the Surface Water Migration Pathway. 33 SD-Source Characterization Source No.: 1 2.4 WASTE CHARACTERISTICS 2.4.1 Selection of Substances Potentially Posing Greatest Hazard The hazardous substances benzene, ethylbenzene, styrene, toluene, xylenes (total), 2-methylnaphthalene, naphthalene, arsenic, barium, chromium, copper, lead, manganese, mercury, nickel, vanadium, and zinc are the substances associated with this source posing the greatest hazard. They were detected at concentrations equal to or greater than their corresponding SQLs or are present in a source with containment greater than zero. Specific toxicity factors, HRS Sec. 2.4.1.1, and selection of the hazardous substances with the highest combined factor values (toxicity, mobility, persistence, and bioaccumulation), HRS Sec. 2.4.1.2, are presented under the Surface Water Migration Pathway section of this documentation record. 34 SD-Hazardous constituent Quantity Source No.: 1 2.4.2 Hazardous Waste Quantity 2.4.2.1.1 Hazardous Constituent Quantity Insufficient data are available to evaluate a Hazardous Constituent Quantity according to the HRS (Ref. 1, Sec. 2.4.2.1.1). A Hazardous Constituent Quantity Value is not assigned according to the available data (in this case, none), and scoring proceeds to the evaluation of Hazardous Wastestream Quantity (Surface Water Pathway) according to the HRS (Ref. 1, Sec. 2.4.2.1.2). Hazardous Substance Constituent Quantity (pounds) (Mass-s) Reference NC NC NC NC: Not Calculated Hazardous Constituent Quantity Value (S): NC Are the data complete for hazardous constituent quantity for this area..... No 2.4.2.1.2 Hazardous Wastestream Quantity Insufficient data are available to evaluate a Hazardous Wastestream Quantity (Surface Water Pathway) according to the HRS (Ref. 1, Sec. 2.4.2.1.2). A Hazardous Wastestream Value is not assigned according to the available data (in this case, none), and scoring proceeds to an evaluation of volume according to the HRS (Ref. 1, Sec. 2.4.2.1.3). Hazardous Wastestream Quantity (pounds) Reference NC NC NC NC: Not Calculated Hazardous Wastestream Quantity Value (W): NC Are the data complete for hazardous constituent quantity for this area...No 35 SD-Volume Source No.: 1 2.4.2.1.3 Volume At the time of the 1999 SI, there were approximately 152,392 gallons [754.51 cubic yards (yd3)] of material remaining on site in four aboveground storage tanks: T01, T02, T03, and T07. The remaining material is a thick, oily-sludge polymerized waste that could not be removed during the removal. According to the HRS Table 2-5, the divisor for tanks is V ÷ 2.5 754.51 yd3 ÷ 2.5 = 301.80 Dimension of source (yd3): 754.51 Reference(s): Ref. 1, Table 2-5; Ref. 11, pp. 13-14; Ref. 28, p. 1 Volume Assigned Value: 301.80 36 SD-Area Source No.: 1 2.4.2.1.4 Area Because the volume of Source No. 1 can be determined, the area is not evaluated. Area of source (ft2): NC Reference(s): Ref. 1, Table 2-5, p. 51591 Area Assigned Value: NC Are the data complete for area quantity for this area?...No 37 SD-Hazardous Constituent Quantity Source No.: 1 2.4.2.1.5 Source Hazardous Waste Quantity Value Source No. 1, TLBP East Facility Tanks T01, T02, T03, and T07 Surface Water, Ground Water and Air Pathways Soil Exposure Pathway (Ref. 1, Sec. 5.2.2.2) Tier A NC NC Tier B NC NC Tier C 301.80 NC Tier D NC NC 301.80 NC Measures Assigned Source Hazardous Waste Quantity Value (Ref. 1, Sec. 2.4.2.1.5) NC = Not calculated The highest value assigned to either Tier A, Tier B, Tier C, or Tier D is assigned as the Source No. 1 Hazardous Waste Quantity Value (Ref. 1, Section 2.4.2.1.5). The highest value assigned is Tier C. Source No. 1 Hazardous Waste Quantity Value: 301.80 38 SD-Source Characterization Source No.:2 SOURCE DESCRIPTION 2.2 SOURCE CHARACTERIZATION 2.2.1 Source Identification The following information corresponds to the second source identified for this documentation record. Number of the source : Source No. 2 Name and description of the source: Contaminated Soil (East Facility’s Tank Battery) The contaminated soil associated with the TLBP East Facility Tank Battery is located within the earthen berm that surrounds Source No. 1 (ASTs T01, T02, T03, and T07)(Fig. 3; Fig. 3A; Fig. 5)(Ref. 11, pp. 14-15; Ref. 13, pp. 10, 29, Photograph Nos. 120, 312). The areal extent of Source No. 5 contaminated soils was estimated to be 55,161 ft2 (Ref. 11, p. 15; Ref. 15, p. 2). The earthen berm is heavily vegetated with no evidence of maintenance. During the 1999 START SI field activities, a breech/cut in the northwestern side of the earthen berm was noted, but no liquids were observed escaping. However, standing water was present in the southeastern portion of the bermed area and material was observed seeping through the south side of the berm where wetlands are identified. There was approximately 2 feet of freeboard remaining within the containment area (Fig. 3A; Fig. 5)(Ref. 9, p. 6; Ref. 11, p. 14; Ref. 13, pp. 11, 20, 21, Photograph Nos. 122, 216-218; p. 53, Photograph No. 106; Ref. 15, pp. 2-3). Three surface soil samples (TLE-SS1-AG, TLE-SS3-AG, and TLE-SS7-AG) at a depth of 0 to 6 inches BGS and one collocated subsurface sample (TLE-SS1-DG) at a depth of 6 to 24 inches BGS were collected (Ref. 10, pp. 25, 27; Ref. 13, pp. 52-52, Photograph Nos. 104, 105). The subsurface sample was collected to characterize the nature and extent of site-related contaminants (Fig. 5)(Ref. 11, p. 58). Chemical analyses of the surface soil samples revealed elevated concentrations of benzene, ethylbenzene, styrene, toluene, xylenes (total), arsenic, barium, chromium, copper, lead, manganese, mercury, nickel, vanadium, and zinc equal to or greater than their corresponding SQLs (Ref. 11, pp. 58-59; Ref. 12, pp. 38-40, 42, 119-120, 122123). Chemical analyses of the subsurface sample revealed elevated concentrations of xylenes (total), arsenic, barium, chromium, copper, lead, manganese, nickel, vanadium, and zinc equal to or greater than their corresponding SQLs (Ref. 11, pp. 58-59; Ref. 12, pp. 38-40, 42, 119-120, 122-123). Location of the source, with reference to a map of the site : Source No. 2 is located in the tank battery in the East Facility of the TLBP site (Fig. 3; Fig. 3A)(Ref. 11, p. 14). The TLBP East Facility is a 5-acre area bordered to the west by the ICW (north and south barge slips), by wooded wetlands to the south and east, and by an unnamed road to the north. A dirt road runs along the east boundary of the facility. The tank battery 39 SD-Source Characterization Source No.:2 consists of seven vertically oriented ASTs and two horizontally oriented ASTs, all of which are contained within an earthen berm. The East Facility has a locked gate which is bound to an 8foot-high, chain-link fence. It can be accessed by PR 109 (South Talen’s Landing Road)(Ref. 9, pp. 5-6; Ref. 11, p. 9; Ref. 13, p. 50, Photograph No. 719). Source Type for HRS evaluation purposes: Contaminated soil Containment Gas release to air: The air migration pathway was not scored; therefore, gas release to air containment was not evaluated. Particulate release to air: The air migration pathway was not scored; therefore, particulate containment was not evaluated. Release to ground water: The ground water migration pathway was not scored; therefore, ground water containment was not evaluated. Release via overland migration and/or flood: There is no documentation or evidence to indicate that the contaminated soil area had a maintained run-on control system or runoff management system, or an engineered cover (Ref. 11, p. 14; Ref. 15, p. 2). The earthen berm area is heavily vegetated with no evidence of maintenance. During the 1999 START SI field activities, a breech/cut in the northwestern side of the earthen berm was noted, but no liquids were observed escaping. However, standing water was present in the southeastern portion of the bermed area and material was observed seeping through the south side of the berm where wetlands are identified (Fig. 3A)(Ref. 9, p. 6; Ref. 11, p. 14; Ref. 13, pp. 11, 20, 21, Photograph Nos. 122, 216-218; p. 45, Photograph No. 106; Ref. 15, pp. 2-3). Analytical results of samples collected from these wetlands revealed elevated concentrations of arsenic, barium, copper, manganese, mercury, nickel, vanadium, and zinc. See Sec. 4.1.2.1 of this documentation record for additional analytical evidence. This source receives a containment value of >0 (Ref. 1, Table 4-2). 2.2.2 Hazardous Substances Associated with a Source The substances associated with this source include benzene, ethylbenzene, styrene, toluene, xylenes (total), arsenic, barium, chromium, copper, lead, manganese, mercury, nickel, vanadium, and zinc. The samples contained concentrations of hazardous substances equal to or greater than their corresponding SQLs (Ref. 11, pp. 58-59, Ref. 12, pp. 38-40, 42, 119-120, 122-123). 40 SD-Source Characterization Source No.:2 C EVIDENCE TABLE: 1999 START SI Report The following tables show the hazardous substances detected at elevated concentrations in soil samples collected during the 1999 START SI sampling mission. The sample was analyzed for TCL volatiles, TCL semivolatiles, and TAL metals (Ref. 12, pp. 292, 296). Hazardous Substance Evidence Reference TCL Volatiles Benzene 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 73; Ref. 12, pp. 119, 123 Ethylbenzene 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 73; Ref. 12, pp. 119, 123 Styrene 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 73; Ref. 12, pp. 119, 123 Toluene 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 73; Ref. 12, pp. 119, 123 Xylenes (total) 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 73; Ref. 12, pp. 119, 123 Arsenic 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 Barium 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 Chromium 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 Copper 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 Lead 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 TAL Metals 41 SD-Source Characterization Source No.: 2 Hazardous Substance Evidence Reference Manganese 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 Mercury 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 Nickel 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 Vanadium 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 Zinc 1999 START SI Report Refer to Source No. 2 Source Characterization Tables, Section 2.2.2 Ref. 11, p. 74; Ref. 12, pp. 38-40, 42 42 SD-Source Characterization Source No.:2 Evidence Samples - Contaminated Soil (East Facility Tank Battery) 1999 START SI Report 0 to 6 inches SURFACE Sample No. TLE-SS1-AG (mg/kg) Hazardous Substance Conc. Sample No. TLE-SS3-AG (mg/kg) SQL Conc. 6 to 24 inches SUBSURFACE Sample No. TLE-SS7-AG (mg/kg) SQL Conc. Sample No. TLE-SS1-DG (mg/kg) SQL Conc. SQL TCL Volatiles Benzene 4.96 1.40 ND 0.63 3.39 JH (1.72) 0.82 ND 1.15 13.30 1.40 ND 0.63 5.57 JH (0.56) 0.82 ND 1.15 Styrene 3.92 1.40 ND 0.63 2.53 JH (0.25) 0.82 ND 1.15 Toluene 7.82 1.40 ND 0.63 19.30 JH (11.84) 0.82 ND 1.15 11.90 1.40 ND 0.63 7.39 JH (0.74) 0.82 2.46 1.15 Arsenic 3.38 1.33 2.52 1.35 2.15 1.39 2.15 1.19 Barium 154 26.60 180 27 111 27.80 174 23.80 Chromium 13.2 1.33 17.80 1.35 7.76 1.39 5.56 1.19 Copper 7.50 3.33 9.88 3.37 5.73 3.47 4.33 2.97 16.5 JK (11.46) 0.40 23.40 JK (16.25) 0.41 9.12 JK (6.33) 0.42 5.26 JK (3.65) 0.36 Manganese 168 2 292 2.03 136 2.08 101 1.78 Mercury 0.15 0.13 0.40 0.14 0.20 0.14 ND 0.12 Nickel 7.39 5.32 5.82 5.40 5.66 5.56 6.70 4.76 11.70 6.65 11.10 6.75 8.77 6.95 8.90 5.95 205 2.66 192 2.70 150 2.78 59.90 2.38 Ethylbenzene Xylenes (Total) TAL Metals Lead Vanadium Zinc 43 SD-Hazardous Constituent Quantity Source No. 2 Evidence Samples - Contaminated Soil (East Facility Tank Battery) 1999 START SI Report 0 to 6 inches SURFACE Sample No. TLE-SS1-AG (mg/kg) Hazardous Substance Conc. 6 to 24 inches SUBSURFACE Sample No. TLE-SS3-AG (mg/kg) SQL Conc. Sample No. TLE-SS7-AG (mg/kg) SQL Conc. SQL Sample No. TLE-SS1-DG (mg/kg) Conc. SQL REFERENCES Chain of Custody Ref. 12, pp. 292, 296 Ref. 12, pp. 292, 296 Ref. 12, pp. 292, 296 Ref. 12, pp. 292, 296 Data Evaluation Ref. 12, pp. 1-10, 96-111 Ref. 12, pp. 1-10, 96-111 Ref. 12, pp. 1-10, 96-111 Ref. 12, pp. 1-10, 96-111 Form I’s Ref. 12, pp. 38, 119 Ref. 12, pp. 42, 122 Ref. 12, pp. 40, 123 Ref. 12, pp. 39, 120 SQLs Ref. 12, pp. 38, 119 Ref. 12, pp. 42, 122 Ref. 12, pp. 40, 123 Ref. 12, pp. 39, 120 Other Supporting References Fig. 5 Fig. 5 Fig. 5 Fig. 5 Notes and Qualifiers: Conc: Concentration JK: Estimated concentration, assuming unknown bias JH: Estimated concentration, assuming high bias mg/kg: Milligrams per kilogram Max: Maximum ND: Not Detected SQL: Sample Quantitation Limit ( ) : Adjusted concentration for “J” data utilizing Qualified Data to Document an Observed Release and Observed Contamination *: (Ref. 4, p. 8) If the background concentration is not detected (or is less than the detection limit), the SQL is used (Ref. 1, p. 51589). Underlined numbers denote that concentration meets observed contamination. Adjusted Factors (Ref. 4, pp. 8, 11-12, 18, Tables 1, 4) Benzene: 1.97 Ethylbenzene: 10 Styrene: 10 Toluene: 1.63 Xylenes (total): 10 Lead : 1.44 44 SD-Source Characterization Source No.2 Sample Source Characterization for Source #2 Hazardous Substances Associated with a Source Available to Pathway Surface Water Air Pathway (SW) Ground Hazardous Soil Exposure GW Parti- Water Overland to Gas culate (GW) /Flood SW Resident Nearby Benzene NS NS NS Y NS NS NS Ethylbenzene NS NS NS Y NS NS NS Styrene NS NS NS Y NS NS NS Toluene NS NS NS Y NS NS NS Xylenes (total) NS NS NS Y NS NS NS Arsenic NS NS NS Y NS NS NS Barium NS NS NS Y NS NS NS Chromium NS NS NS Y NS NS NS Copper NS NS NS Y NS NS NS Lead NS NS NS Y NS NS NS Manganese NS NS NS Y NS NS NS Mercury NS NS NS Y NS NS NS Nickel NS NS NS Y NS NS NS Vanadium NS NS NS Y NS NS NS Zinc NS NS NS Y NS NS NS Substances TCL Volatiles TAL Metals Key: NS = Not Scored Y = Yes 45 SD-Source Characterization Source No.2 2.2.3 Hazardous Substances Available to a Pathway Because containment for this source is greater than zero, the following substances associated with the source can migrate via the Surface Water Pathway (Ref. 1, Sec. 4.1.2.1.2.2.1): CBenzene CEthylbenzene CStyrene CToluene CXylenes (total) CArsenic CBarium CChromium CCopper CLead CManganese CMercury CNickel CVanadium CZinc Furthermore, sediment samples collected at PPE 3 and from on-site wetlands confirm that the following hazardous substances have already migrated to the Surface Water Migration Pathway (see Sec. 4.1.2.1 of this Documentation Record) (Ref. 11, p. 87; Ref. 12, pp. 25-28; 116-119, 194-201): CArsenic CBarium CCopper CManganese CMercury CNickel CVanadium CZinc 2.3 LIKELIHOOD OF RELEASE Refer to Sec. 4.1.2.1 of this documentation record for specific information related to the Likelihood of Release to the Surface Water Migration Pathway. 46 SD-Source Characterization Source No.2 2.4 WASTE CHARACTERISTICS 2.4.1 Selection of Substance Potentially Posing Greatest Hazard The hazardous substances benzene, ethylbenzene, styrene, toluene, xylenes (total), arsenic, barium, chromium, copper, lead, manganese, mercury, nickel, vanadium, and zinc are the substances associated with this source. They were detected at concentrations equal to or greater than their corresponding SQLs or are present in a source with containment greater than zero. Specific toxicity factors, HRS Sec. 2.4.1.1, and selection of the hazardous substances with the highest combined factor values (toxicity, mobility, persistence, and bioaccumulation), HRS Sec. 2.4.1.2, are presented under the Surface Water Migration Pathway section of this documentation record. 47 SD-Hazardous Constituent Quantity Source No.: 2 2.4.2 Hazardous Waste Quantity 2.4.2.1.1 Hazardous Constituent Quantity Insufficient data are available to evaluate a Hazardous Constituent Quantity according to the HRS (Ref. 1, Sec. 2.4.2.1.1). A Hazardous Constituent Quantity Value is not assigned according to the available data (in this case, none), and scoring proceeds to the evaluation of Hazardous Wastestream Quantity (Surface Water Pathway) according to the HRS (Ref. 1, Sec. 2.4.2.1.2). Hazardous Substance Constituent Quantity (pounds) (Mass-s) Reference NC NC NC NC: Not Calculated Hazardous Constituent Quantity Value (S): NC Are the data complete for hazardous constituent quantity for this area..... No 2.4.2.1.2 Hazardous Wastestream Quantity Insufficient data are available to evaluate a Hazardous Wastestream Quantity (Surface Water Pathway) according to the HRS (Ref. 1, Sec. 2.4.2.1.2). A Hazardous Wastestream Value is not assigned according to the available data (in this case, none), and scoring proceeds to an evaluation of volume according to the HRS (Ref. 1, Sec. 2.4.2.1.3). Hazardous Wastestream Quantity (pounds) Reference NC NC NC NC: Not Calculated Hazardous Wastestream Quantity Value (W): NC Are the data complete for hazardous constituent quantity for this area...No 48 SD-Volume Source No.: 2 2.4.2.1.3 Volume The information available is not sufficient to evaluate Tier C; therefore, it is not possible to adequately determine a source volume (Tier C) in cubic yards (yd3) for Source No. 2 (Ref. 1, Sec. 2.4.2.1.3, p. 51591). As a result, the evaluation of source volume proceeds to the evaluation of Tier D, source area (Ref. 1, Sec. 2.4.2.1.4, p. 51591). Dimension of source (yd3 or gallons): NC Reference(s): NC Volume Assigned Value: NC Are the data complete for volume quantity for this area?...No 49 SD-Area Source No.: 2 2.4.2.1.4 Area Four representative soil samples were collected from an area (berm area) with similar soil type. During the 1999 Start SI reconnaissance, the areal extent of the East Facility tank battery was measured to be approximately 55,161 ft2 for the area associated with tanks T01, T02, T03, and T07. However, areas covered by buildings and/or maintained, impenetrable materials (such as ASTs) were excluded from the area calculations because they could not be adequately delineated and/or identified. Therefore, the area source will be assigned an area hazardous waste quantity value of >0. The value >0 reflects that the area value is known to be greater than 0, but the exact amount is unknown. Area of source (ft2): unknown, but >0 Area Assigned Value: >0 References: Fig.3, Fig. 3A, Fig. 5; Ref. 1, Sec. 2.4.2.1.4; Ref. 11, p. 15; Ref. 15, pp. 2-3; Ref. 17, pp. 1-5 50 SD-Waste Quantity Value Source No.: 2 2.4.2.1.5 Source Hazardous Waste Quantity Value Source No. 2, Contaminated Soil (East Facility Tank Battery) Surface Water, Ground Water and Air Pathways Soil Exposure Pathway (Ref. 1, Sec. 5.2.2.2) Tier A NC NC Tier B NC NC Tier C NC NC Tier D >0, but unknown NC >0 NC Measures Assigned Source Hazardous Waste Quantity Value (Ref. 1, Sec. 2.4.2.1.5) NC = Not calculated The highest value assigned to either Tier A, Tier B, Tier C, or Tier D is assigned as the Source No. 2 Hazardous Waste Quantity Value (Ref. 1, Section 2.4.2.1.5). The highest value assigned is Tier D. Source No. 2 Hazardous Waste Quantity Value: >0 51 SD-Source Characterization Source No.:3 SOURCE DESCRIPTION 2.2 SOURCE CHARACTERIZATION 2.2.1 Source Identification The following information corresponds to the third source identified for this documentation record. Number of the source : Source No. 3 Name and description of the source: Drums During the August 1997 START Removal sampling activities, ten 55-gallon drums were inventoried and hazard categorized (hazcat) on site. Each of the ten drums were labeled sequentially D01 through D10. The drums were open, and full of what appeared to be water with several inches of salt at the bottom. A sack of salt was on the ground next to the drums. Based on the field chemistry results, the following hazard categories were assigned: D01, acid oxidizer; D04, D08, D09, and D10, non-characteristic; and D02, D03, and D05, combustible (Ref. 9, pp. 11-12, 16-17; Ref. 27, p. 45). A grab sample from drum D01 (Sample No. 01DUG01) was sent to a procured laboratory for pH analysis. The pH was measured at 1.0. Grab samples from drums D02 and D05 (Sample Nos. 01DOG02 and 01DOG05) were analyzed for TCL volatiles. A composite sample of drums D02 and D05 (Sample No. 01DOC01) was analyzed for TCL semivolatiles, TCL pesticides/polychlorinated biphenyls (PCBs), and TAL metals (Ref. 9, pp. 11-12, 19; Ref. 26, p. 35; Ref. 27, p. 45). Chemical analyses of the drum samples revealed the presence of benzene, ethylbenzene, styrene, toluene, xylenes (total), 2-methylnaphthalene, and naphthalene at concentrations equal to or greater than their corresponding SQLs (Ref. 9, pp. 21-22; Ref. 13, pp. 39-41, Photograph Nos. 633-636; Ref. 26, pp. 10, 23-24, 33-34). Location of the source, with reference to a map of the site : Source No. 3 is located in the Process Area in the TLBP East Facility (Fig. 3A)(Ref. 9, p. 11). The TLBP East Facility is a 5-acre area bordered to the west by the ICW (north and south barge slips), by wooded wetlands to the south and east, and by an unnamed road to the north. A dirt road runs along the east boundary of the facility. The East Facility has a locked gate which is bound to an 8-foot-high, chain-link fence. It can be accessed by PR 109 (South Talen’s Landing Road)(Ref. 9, pp. 5-6; Ref. 11, p. 9; Ref. 13, p. 50, Photograph No. 719). 52 SD-Source Characterization Source No.:3 Source type for HRS evaluation purposes: Drums Containment Gas release to air: The air migration pathway was not scored; therefore, gas release to air containment was not evaluated. Particulate release to air: The air migration pathway was not scored; therefore, particulate containment was not evaluated. Release to ground water: The ground water migration pathway was not scored; therefore, ground water containment was not evaluated. Release via overland migration and/or flood: The drums were open, and full of what appeared to be water with several inches of salt at the bottom. There is no evidence or documentation that diking (or similar structure) surrounds the container area (Ref. 9, pp. 11-12; Ref. 13, pp. 39-41, Photograph Nos. 633-636). This source receives a containment value of >0 (Ref. 1, Table 4-2). 2.2.2 Hazardous Substances Associated with a Source The substances associated with this source include benzene, ethylbenzene, styrene, toluene, xylenes (total), 2-methylnaphthalene, and naphthalene. The samples contained concentrations of hazardous substances equal to or greater than their corresponding SQLs (Ref. 9, pp. 21-22; Ref. 26, pp. 10, 23-24, 33-34). 53 SD-Source Characterization Source No.:3 C EVIDENCE TABLE: 1997 START Removal Report The following tables show the hazardous substances detected at elevated concentrations in the drum samples collected during the 1997 START Removal sampling mission. The samples were analyzed for TCL volatiles, TCL semivolatiles, TCL pesticides/PCBs, and TAL metals (Ref. 9, pp. 11-12; Ref. 26, p. 35; Ref. 27, p. 24). Hazardous Substance Evidence Reference TCL Volatiles Benzene 1997 START Removal Assessment Refer to Source No. 3 Source Characterization Tables, Section 2.2.2 Ref. 9, pp. 11-12; Ref. 26, pp. 10, 23-24, 33-34 Ethylbenzene 1997 START Removal Assessment Refer to Source No. 3 Source Characterization Tables, Section 2.2.2 Ref. 9, pp. 11-12; Ref. 26, pp. 10, 23-24, 33-34 Styrene 1997 START Removal Assessment Refer to Source No. 3 Source Characterization Tables, Section 2.2.2 Ref. 9, pp. 11-12; Ref. 26, pp. 10, 23-24, 33-34 Toluene 1997 START Removal Assessment Refer to Source No. 3 Source Characterization Tables, Section 2.2.2 Ref. 9, pp. 11-12; Ref. 26, pp. 10, 23-24, 33-34 Xylenes (total) 1997 START Removal Assessment Refer to Source No. 3 Source Characterization Tables, Section 2.2.2 Ref. 9, pp. 11-12; Ref. 26, pp. 10, 23-24, 33-34 2-Methylnaphthalene 1997 START Removal Assessment Refer to Source No. 3 Source Characterization Tables, Section 2.2.2 Ref. 9, pp. 11-12; Ref. 26, pp. 10, 23-24, 33-34 Naphthalene 1999 Expanded Site Inspection Refer to Source No. 3 Source Characterization Tables, Section 2.2.2 Ref. 9, pp. 11-12; Ref. 26, pp. 10, 23-24, 33-34 TCL Semivolatiles 54 SD-Source Characterization Source No.:3 Evidence Samples - Drums 1997 START Removal Assessment Sample No. 01DOG02 (mg/kg) Hazardous Substance Conc. Sample No. 01DOG05 (mg/kg) SQL Conc. Sample No. 01DOC01 (mg/kg) SQL Conc. SQL TCL Volatiles Benzene ND 120 170 120 NA NC Ethylbenzene 370 120 300 120 NA NC Styrene ND 120 120 120 NA NC 110 JK (67.48) 120 350 120 NA NC 930 120 550 120 NA NC 2-Methylnaphthalene NA NC NA NC 3,800 500 Naphthalene NA NC NA NC 2,500 500 Toluene Xylenes (Total) 55 TCL Semivolatiles REFERENCES Form I’s Ref. 26, p. 33 Ref. 26, p. 34 Ref. 26, pp. 23-24 Data Evaluation Ref. 26, pp. 15-22, 26-32 Ref. 26, pp. 15-22, 26-32 Ref. 26, pp. 15-22, 26-32 Chain of Custody Ref. 26, p. 35 Ref. 26, p. 35 Ref. 26, p. 35 SQLs Ref. 12, p. 304; Ref. 24, pp. 1-5; Ref. 25, pp. 1-5 Ref. 12, p. 304; Ref. 24, pp. 1-5; Ref. 25, pp. 1-5 Ref. 12, p. 304; Ref. 24, pp. 1-5; Ref. 25, pp. 1-5 Other Supporting References Ref. 9, p. 15; Fig. 3B Ref. 9, p. 15; Fig. 3B Ref. 9, p. 15; Fig. 3B Notes and Qualifiers: Conc: Concentration JK: Estimated concentration, assuming unknown bias SD-Source Characterization Source No.: 3 mg/kg: Milligrams per kilogram Max: Maximum NA: Not Analyzed NC: Not Calculated ND: Not Detected SQL: Sample Quantitation Limit ( ) : Adjusted concentration for “J” data utilizing Qualified Data to Document an Observed Release and Observed Contamination (Ref. 4, p. 8) Underlined numbers denote that concentration meets observed contamination. Adjusted Factors ( Ref. 4, pp. 8, 12, Table 1) Toluene: 1.63 56 SD-Source Characterization Source No.:3 Sample Source Characterization for Source #3 Hazardous Substances Associated with a Source Available to Pathway Surface Water (SW) Air Pathway Soil Exposure Gas Particulate Ground Water (GW) Overland /Flood GW to SW Resident Nearby Benzene NS NS NS Y NS NS NS Ethylbenzene NS NS NS Y NS NS NS Styrene NS NS NS Y NS NS NS Toluene NS NS NS Y NS NS NS Xylenes (total) NS NS NS Y NS NS NS 2-Methylnaphthalene NS NS NS Y NS NS NS Naphthalene NS NS NS Y NS NS NS Hazardous Substances TCL Volatiles TCL Semivolatiles Key: NS = Not Scored Y = Yes April 17, 2000 06:KJ6105_100501SSXX 57 Talen’s Landing Bulk Plant LA0000187518 SD-Source Characterization Source No.:3 2.2.3 Hazardous Substances Available to a Pathway Because containment for this source is greater than zero, the following substances associated with the source can migrate via the Surface Water Pathway (Ref. 1, Sec. 4.1.2.1.2.2.1): CBenzene CEthylbenzene CStyrene CToluene CXylenes (total) C2-Methylnaphthalene CNaphthalene Furthermore, sediment samples collected at PPE 3 and from the on-site wetlands confirm that the following hazardous substances have already migrated to the Surface Water Migration Pathway (see Sec. 4.1.2.1 of this Documentation Record) (Ref. 11, p. 87; Ref. 12, pp. 25-28, 116-119, 194-201). CArsenic CBarium CCopper CManganese CMercury CNickel CVanadium CZinc 2.3 LIKELIHOOD OF RELEASE Refer to Sec. 4.1.2.1 of this documentation record for specific information related to the Likelihood of Release to the Surface Water Migration Pathway. 58 SD-Source Characterization Source No.:3 2.4 WASTE CHARACTERISTICS 2.4.1 Selection of Substance Potentially Posing Greatest Hazard The hazardous substances benzene, ethylbenzene, styrene, toluene, xylenes (total), 2methylnaphthalene, and naphthalene are the substances associated with this source. They were detected at concentrations equal to or greater than their corresponding SQLs, or are present in a source with containment greater than zero. Specific toxicity factors, HRS Sec. 2.4.1.1, and selection of the hazardous substances with the highest combined factor values (toxicity, mobility, persistence, and bioaccumulation), HRS Sec. 2.4.1.2, are presented under the Surface Water Migration Pathway section of this documentation record. 59 SD-Hazardous Constituent Quantity Source No.: 3 2.4.2 Hazardous Waste Quantity 2.4.2.1.1 Hazardous Constituent Quantity Insufficient data are available to evaluate a Hazardous Constituent Quantity according to the HRS (Ref. 1, Sec. 2.4.2.1.1). A Hazardous Constituent Quantity Value is not assigned according to the available data (in this case, none), and scoring proceeds to the evaluation of Hazardous Wastestream Quantity (Surface Water Pathway) according to the HRS (Ref. 1, Sec. 2.4.2.1.2). Hazardous Substance Constituent Quantity (pounds) (Mass-s) Reference NC NC NC NC: Not Calculated Hazardous Constituent Quantity Value (S): NC Are the data complete for hazardous constituent quantity for this area..... No 2.4.2.1.2 Hazardous Wastestream Quantity Insufficient data are available to evaluate a Hazardous Wastestream Quantity (Surface Water Pathway) according to the HRS (Ref. 1, Sec. 2.4.2.1.2). A Hazardous Wastestream Value is not assigned according to the available data (in this case, none), and scoring proceeds to an evaluation of volume according to the HRS (Ref. 1, Sec. 2.4.2.1.3). Hazardous Wastestream Quantity (pounds) Reference NC NC NC NC: Not Calculated Hazardous Wastestream Quantity Value (W): NC Are the data complete for hazardous constituent quantity for this area...No 60 SD-Volume Source No.: 3 2.4.2.1.3 Volume The ten 55-gallon drums were open, and full of what appeared to be water with several inches of salt at the bottom. The exact volumes of the source in the drums cannot be determined; therefore, a default volume of 50 gallons is assigned to each container. To calculate the amount of the source in the drums, Tier C will be used for the calculation. Total Volume = = 50 gallons x 500 gallons 10 drums According to the HRS Table 2-5, the divisor for a drum is V÷500 500 ÷ 500 = 1 Dimension of source (yd3 or gallons): 500 gallons Reference(s): Ref. 1, Table 2-5; Ref. 9, p. 11 Volume Assigned Value: 1 61 SD-Area Source No.: 3 2.4.2.1.4 Area Because the volume of Source No. 3 can be determined, the area is not evaluated. Area of source (ft2): NC Reference(s): NC Area Assigned Value: NC Are the data complete for area quantity for this area?...No 62 SD-Hazardous Waste Quantity Value Source No.: 3 2.4.2.1.5 Source Hazardous Waste Quantity Value Source No. 3, Drums Surface Water, Ground Water and Air Pathways Soil Exposure Pathway (Ref. 1, Sec. 5.2.2.2) Tier A NC NC Tier B NC NC Tier C 1 NC Tier D NC NC 1 NC Measures Assigned Source Hazardous Waste Quantity Value (Ref. 1, Sec. 2.4.2.1.5) NC = Not calculated The highest value assigned to either Tier A, Tier B, Tier C, or Tier D is assigned as the Source No. 3 Hazardous Waste Quantity Value (Ref. 1, Section 2.4.2.1.5). The highest value assigned is Tier C. Source No. 3 Hazardous Waste Quantity Value: 1 63 SD-Summary 2.4.2.2.5 Calculation of Hazardous Waste Quantity Factor Value SITE SUMMARY OF SOURCE DESCRIPTIONS CONTAINMENT Source Hazardous Waste Quantity Value Air Source No. Surface Water Migration Pathway Soil Exposure Pathway Ground Water Surface Water Gas Air Particulate 1 301.80 NS NS 10 NS NS 2 >0 NS NS 10 NS NS 3 1 NS NS 10 NS NS Total >302.80 NS - Not Scored NS The sum of the source hazardous waste quantity values is assigned as the Hazardous Waste Quantity Factor Value (Ref. 1, Sec. 2.4.2.2). The sum of the source hazardous waste quantity values for Surface Water Pathway, rounded to the nearest integer, is >302.80. For a Hazardous Waste Quantity range of greater than 100 to 10,000, a value of 100 is assigned from Ref. 1, Table 2-6 for the migration pathway (Ref. 1, Sec. 2.4.2.2, Table 2-6). Level II concentrations have been documented by chemical analyses to the surface water overland flow-environmental threat. This could also serve as the basis for assigning a value of 100 for the hazardous waste quantity factor value. See Section 4.2.4 for documentation of the observed release. Assigned Factor Value for Migration Pathways: 100 64 GW-General 3.0 GROUND WATER MIGRATION PATHWAY 3.0.1 GENERAL CONSIDERATIONS An observed release has been documented in a rig supply well of the Jupiter Plant facility, located approximately 1,200 feet northeast of the TLBP West Facility; however, there are no target receptors associated with this well. An observed release was not documented from the samples collected from the other wells. Due to the lack of target receptors and observed release, evaluation of this pathway will not significantly affect the site score. 65 SWOF-Surface Water Overland Flow/Flood Migration Component 4.0 SURFACE WATER MIGRATION PATHWAY 4.1 OVERLAND/FLOOD MIGRATION COMPONENT 4.1.1.1 Definition of Hazardous Substance Migration Path for Overland/Flood Component General Considerations: The topography of the TLBP site and the surrounding area is relatively flat. The elevation of the site is approximately 5 feet above the National Geodetic Vertical Datum (NGVD). The site is slightly built up above the original grade due to deposition dredge spoils from the construction of the ICW and docking slips (Ref. 5, p. 3; Ref. 11, p. 97). The area of drainage associated with the site is considered the TLBP Facility, which consists of 5 acres for the TLBP West Facility and 5 acres for the TLBP East Facility (Ref. 11, p. 98). The 2-year, 24-hour rainfall is 5.5 inches (Ref. 29, pp. 1-2). Based on the Federal Emergency Management Agency’s Flood Insurance Rate Map for Cameron Parish, Louisiana, the site is located within a 100-year flood plain (Ref. 11, pp. 97-98). Definition of Overland Segment and Probable Point of Entry (PPE) Surface water runoff from the TLBP site has been divided into two segments. OFS No. 1 includes surface water runoff from the Heater/Process Area and the northwest section of the TLBP East Facility Tank Battery, entering the ICW at PPE 1 and 2 (Fig. 6)(Ref. 11, p. 98). OFS No. 2 consists of the surface water runoff area from the TLBP East Facility Tank Battery entering the wetlands at PPE 3, which is located south of the site (Fig. 6)(Ref. 18, p. 3; Ref. 11, p. 98; Ref. 15, p. 1).(Fig. 6)(Ref. 11, p. 98)(Ref. 13, pp. 21-22, Photograph Nos. 217-219). PPE 1 and 2: OFS No. 1 includes surface water runoff from the Heater/Process Area and the northwest section of the TLBP East Facility Tank Battery entering the ICW. This overland flow segment does not contain a drainage ditch, but the general topography of the area indicates that the runoff drains from the Heater/Process Area toward the north barge slips, which is contiguous with the ICW. During the 1999 START SI field activities, a breech/cut in the northwestern side of the earthen berm was noted, but no liquids were observed escaping. However, standing water was present in the southeastern portion of the berm area and material was observed seeping through the south side of the berm where wetlands are identified. There was approximately 2 feet of freeboard remaining within the containment area (Fig. 3A)(Fig. 6)(Ref. 11, pp. 14-16; Ref. 15, pp. 2-3). The two PPE associated with OFS No. 1 are PPE 1 and PPE 2. The distance from the Heater/Process Area to PPE 1 at the north barge slip of the ICW is approximately 75 feet. Sample Nos. TLE-SD1-AG and TLE-SD7-AG were collected at PPE 1 (Ref. 13, p. 62, Photograph No. 66 SWOF-Surface Water Overland Flow/Flood Migration Component 123). The distance from the breach in the northwest section of the tank battery to PPE 2 at the south barge slip of the ICW is approximately 50 feet. Sample No. TLE-SD2-AG was collected at PPE 2 (Fig. 6)(Ref. 11, p. 98; Ref. 13, p. 61, Photograph No. 122). PPE 3: OFS No. 2 consists of surface water runoff from the TLBP East Facility Tank Battery, flowing south and east towards the surrounding low-lying wetlands (Ref. 15, p. 1; Ref. 18, p. 3). OFS No. 2 begins at the point where the seep was identified in the south berm of the tank battery and continues into the nearby wetlands. At this point, the drainage path appears to split, with one drainage continuing northeast within the wetland area, while the other drainage proceeds south towards an additional wetland area and the ICW (Ref. 11, pp. 98-99; Ref. 18, p. 3). The point where the drainage pathway first enters the wetland is PPE 3. Sample No. TLE-SD4-AG was collected at PPE 3 (Fig 6)(Ref. 13, p. 51, Photograph No. 101). The distance from the TLBP East Facility to the wetland area is approximately 10 feet (Ref. 11, pp. 98-99; Ref. 15, p. 1; Ref. 18, p. 3). Additional samples were collected along this pathway during the 1999 START SI to delineate contaminated wetlands (Fig. 6; Fig. 7). 67 SWOF-Observed Release Definition of In-Water Segments Wetlands Based on the analytical data obtained during the 1999 START SI sampling activity, samples associated with OFS No. 1 did not meet the criteria for an observed release. Level II contamination of the wetlands is documented by chemical analyses within OFS No. 2 (see Sec. 4.1.4.3). The segment subject to Level II contamination is approximately 1 mile and was determined by extrapolating the perimeter of the wetland starting at PPE3 to the farthest wetland sample (Sample No. TLE-SD6-AG) that met the observed release criteria (Fig. 8) (Ref. 3, pp. 1-4; Ref. 11, p. 101; Ref. 15, pp. 1-3; Ref. 18, p. 3). The average annual surface water flow through the wetlands is assumed to be minimal; a conservative default dilution weight of 0.1 is assigned (Ref. 1, Sec. 4.1.4.3.1, Table 4-13). There are numerous designated wetlands within the 15-mile TDL area (Ref. 18, pp. 1-13). According to the National Wetlands Inventory (NWI) Maps, there are more than 20 linear miles of wetland area that are subject to potential contamination (Ref. 1, Sec. 4.4.3.1.3; Ref. 11, p. 100; Ref. 18, pp. 1-13). Intracoastal Waterway/Coastal Tidal Area Due to the complex and erratic flow patterns of the ICW, along with the large number of interconnected water bodies and wetlands, the 15-mile downstream target distance limit (TDL) is considered to encompass the entire area within a 15-mile arc. The origin point of the 15-mile arc is the contaminated wetlands associated with PPE 3, and the arc covers the entire surface water area to the east, south, and west of the site (Ref. 5, pp. 1-13; Ref, 11, p. 100; Ref. 18, pp. 1-13). The following water bodies are considered to be within the 15-mile TDL: Grand Lake, Mermentau River north of its point of entry into Grand Lake, White Lake, and Gueydan Canal and numerous unnamed canals and bayous to the south and east of the site and wetlands that are contiguous with this water segment (Ref. 5, pp. 1-13; Ref. 11, p. 100; Ref. 18, pp. 1-13). The direction of flow in the ICW is variable, depending on tidal influences and the water level of the Mermentau River (Ref. 16, pp. 2, 5). The confluence of the ICW and the Mermentau River is approximately 10 stream miles west of the site (Ref. 5, pp. 1-13; Ref. 16, p. 5). According to the Louisiana Department of Wildlife and Fisheries (LDWF), during periods of low water levels, the water flow in the Mermentau River reverses, causing the flow in the ICW to also reverse direction (Ref. 16, p. 5). The ICW system with the 15-mile TDL arc of the site is primarily fresh water. A series of locks restricts the amount of saltwater that can enter the system. Calcasieu Locks to the west prevent saltwater intrusion from Calcasieu Lake, freshwater Bayou Locks to the east prevent saltwater intrusion from Vermillion Bay, and Catfish Point Control Locks at the south end of the Grand Lake limit saltwater intrusion from the Gulf of Mexico (Ref. 5, pp. 1-13; Ref. 11, pp. 99-100; Ref. 16, p.1). A dilution weight of 0.0001 (coastal tidal waters) is assigned to the ICW (Ref. 1, Sec. 4.1.4.3.1.3, Table 4-13). 68 SWOF-Observed Release Recreational fishing is common in the area and has been documented by START at the TMF facility (Ref. 14, p. 5). Commercial fishing is also conducted within the 15-mile TDL arc for both freshwater and marine species including: catfish, buffalo (fish), blue crabs, paddlefish, and white shrimp. Grand Lake is the primary commercial fishing grounds for those species in Cameron Parish. The LDWF does not keep records on pounds of fish caught and consumed annually per water body (Ref. 11, p. 100; Ref. 16, pp. 4-5; Ref. 19, p. 1; Ref. 22, p. 1). Paddlefish (Polydon spathula) is a rare, threatened, and/or endangered species in the State of Louisiana and it is found within the 15-mile TDL of the site (Ref. 11, p. 101; Ref. 16, p. 4; Ref. 20, p. 1) Grand Lake is located within the TDL in the Lacassine National Wildlife Refuge, approximately 10 miles west of the site (Ref. 5, pp. 1-13; Ref. 20, p. 1). There are no surface water intakes within the 15-mile TDL (Ref. 21, p. 1; Ref. 11, p. 101). 69 SWOF-Observed Release 4.1.2.1 Likelihood of Release During the 1999 START SI, wetland sediment samples were collected to determine the extent of contamination in the surface water migration pathway. Chemical analyses of the four wetland sediment samples (Sample Nos. TLE-SD3-AG, TLE-SD4-AG, TLE-SD5-AG, and TLE-SD6-AG) collected from OFS No. 2 contained concentrations of arsenic, barium, copper, manganese, mercury, nickel, vanadium, and zinc that met observed release criteria (Fig. 7; Fig. 8)(Ref. 11, p. 62; Ref. 13, pp. 51-52, Photograph Nos. 101-103). The background wetland sediment sample for OFS No. 2 (Sample No. TLO-BD2-AG) was collected on March 25, 1999 at 0 to 6 inches BGS from the wetlands northeast of the site, 110 feet south of Parish Road 104, 75 feet east of a camp entrance, east of the Jupiter Plant (Fig. 4) (Ref. 11, pp. 36, 87-88). The background wetland samples and the contaminated wetland samples were collected from comparable wetland sediments (Ref. 17, pp. 1-5). All samples were analyzed for TCL semivolatiles, TCL volatiles, and TAL metals (Ref. 12, pp. 286, 291, 296, 300). The wetland samples in the OFS No. 2 contained contaminants at concentrations equal to or greater than their corresponding SQLs and than three times the background sample concentration (Ref. 11, pp. 87-88). 70 SWOF-Observed Release Chemical Analyses: C OFS No. 2 Background Concentration - 1999 START SI Sample No. TLO-BD2-AG was collected on March 25, 1999 at 0 to 6 inches BGS from the wetlands northeast of the site, 110 feet south of Parish Road 104 and 75 feet east of a camp entrance (Fig. 4) (Ref. 11, pp. 36, 87-88). The grab sample was collected from upstream wetlands with similar flora and sediments as those found in the downstream wetlands and was analyzed for TCL semivolatiles, TCL volatiles, and TAL metals (Fig. 4)(Ref. 12, pp. 291, 296). Sample No. Depth Date Reference TLO-BD2-AG 0 to 6 inches March 25, 1999 Ref. 11, pp. 36, 87-88 71 SWOF-Observed Release 1999 START SI Report Background Wetland Sample Sample No. TLO-BD2-AG (mg/kg) Hazardous Substance Conc. SQL 3x Background* Arsenic ND 1.60 1.60 Barium 54 32 162 Chromium 4.10 1.60 12.30 Copper ND 4 4 10.80 JK (15.55) 0.48 46.65 20.50 2.40 61.50 Mercury ND 0.16 0.16 Nickel ND 6.40 6.40 Vanadium ND 8 8 Zinc 9.89 3.20 29.67 TAL Metals Lead Manganese REFERENCES Form I’s Ref. 12, p. 43 Chain of Custody Ref. 12, p. 296 Data Evaluation Ref. 12, p. 1-12 SQLs Ref. 12, p. 303; Ref. 24, pp. 1-5; Ref. 25, pp.1-5 Other Supporting References Fig. 4 Notes and Qualifiers: Conc: Concentration JK: Estimated concentration, assuming unknown bias mg/kg: Milligrams per kilogram ND: Not Detected SQL: Sample Quantitation Limit ( ): Adjusted concentration for “J” data utilizing Qualified Data to Document an Observed Release and Observed Contamination (Ref. 4, p. 8) *: If the background concentration is not detected (or is less than the detection limit), the SQL is used (Ref. 1,p. 51589). Adjusted Factors (Ref. 4, pp. 8, 18, Table 4) Lead : 1.44 72 SWOF-Observed Release C Contaminated Samples - 1999 START SI The samples in the following tables are wetland sediment samples collected during the 1999 START SI sampling mission from OFS No. 2. These samples are grab samples collected from PPE 3 and from on-site wetlands with similar flora and sediments as those found in the background wetlands (Fig. 4; Fig. 6; Fig. 7) (Ref. 17, pp. 1-5). The wetland sediment samples were analyzed for TCL semivolatiles, TCL volatiles, and TAL metals by a procured laboratory (Ref. 11, pp. 87-88; Ref. 12, pp. 286, 300; Ref. 13, pp. 51-52, Photograph Nos. 101-103). Sample No. Depth Date TLE-SD3-AG 0 to 6 inches March 23, 1999 TLE-SD4-AG 0 to 6 inches March 23, 1999 TLE-SD5-AG 0 to 6 inches March 23, 1999 TLE-SD6-AG 0 to 6 inches March 23, 1999 73 Reference Ref. 11, pp. 87-88; Ref. 12, pp. 23-26; 114-117 SWOF-Observed Release Evidence - Overland Flow Segment No. 2 Wetland Sediment Samples 1999 START SI Report Background Sample* Sample No. TLO-BD2-AG (mg/kg) Sample No. TLE-SD3-AG (mg/kg) SQL Conc. Sample No. TLE-SD5-AG (mg/kg) SQL Conc. Sample No. TLE-SD6-AG (mg/kg) Max Conc. SQL 3x Max. Conc. Arsenic ND 1.6 1.60 4.46 1.70 2.37 1.20 4.22 1.50 ND 1.70 Barium 54 32 162 376 34 81.70 24 434 30 193 34 Chromium 4.1 1.60 12.30 10.60 1.70 6.04 1.20 10.70 1.50 4.21 1.70 Copper ND 4 4 6.60 4.25 ND 3 9.24 3.75 ND 4.25 10.80 JK (15.55) 0.48 46.65 14.50 0.51 5.44 0.36 13.30 0.45 6.95 0.51 20.50 2.40 61.50 84.80 2.55 159 1.80 106 2.25 138 2.55 Mercury ND 0.16 0.16 ND 0.17 ND 0.12 0.38 0.15 ND 0.17 Nickel ND 6.40 6.40 7.5 6.80 6.31 4.80 8.64 6 ND 6.80 Vanadium ND 8 8 19 8.50 10.2 6 18.60 7.50 8.98 8.50 Zinc 9.89 3.20 29.67 636 3.40 21.20 2.40 69.10 3 33.50 3.40 Hazardous Substance Conc. Sample No. TLE-SD4-AG (PPE 3) (mg/kg) SQL Conc. SQL TAL Metals Lead 74 Manganese REFERENCES Form I’s Ref. 12, p. 43 Ref. 12, p. 23 Ref. 12, p. 25 Ref. 12, p. 26 Ref. 12, p. 24 Chain of Custody Ref. 12, p. 296 Ref. 12, p. 300 Ref. 12, p. 300 Ref. 12, p. 300 Ref. 12, p. 300 Data Evaluation Ref. 12, pp. 1-10 Ref. 12, pp. 1-10 Ref. 12, pp. 1-10 Ref. 12, pp. 1-10 Ref. 12, pp. 1-10 SQLs Ref. 12, pp. 303; Ref. 24, pp. 1-5; Ref. 25, pp.1-5 Ref. 12, pp. 303; Ref. 24, pp. 1-5; Ref. 25, pp. 1-5 Ref. 12, pp. 303; Ref. 24, pp. 1-5; Ref. 25, pp. 1-5 Ref. 12, pp. 303; Ref. 24, pp. 1-5; Ref. 25, pp. 1-5 Ref. 12, pp. 303; Ref. 24, pp. 1-5; Ref. 25, pp. 1-5 Other Supporting References Fig. 4 Fig. 7; Fig. 8 Fig. 7; Fig. 8 Fig. 7; Fig. 8 Fig. 7; Fig. 8 Notes and Qualifiers: SWOF-Observed Release Conc: Concentration JK: Estimated concentration, assuming unknown bias mg/kg: Milligrams per kilogram ND: Not Detected SQL: Sample Quantitation Limit ( ): Adjusted concentration for “J” data utilizing Qualified Data to Document an Observed Release and Observed Contamination (Ref. 4, p. 8) *: If the background concentration is not detected (or is less than the detection limit), the SQL is used (Ref. 1, p. 51589). Underlined numbers denote that concentration meets observed contamination. Adjusted Factors (Ref. 4, pp. 8, 18, Table 4) Lead : 1.44 75 SWOF-Observed Release Attribution: Talen’s Landing Bulk Plant was designed to process 5,000 barrels per stream day (BPSD) of southern Louisiana mixed crude. The three main products of this facility were naphtha, diesel, and reduced crude (Ref. 30, p. 2). A National Pollutant Discharge Elimination System (NPDES) permit was issued to TLBP to discharge wastewater into an unnamed tributary of the ICW (Ref. 31, p. 1). The facility operated as a Treatment/Storage/Disposal (TSD) Facility, and a Hazardous Waste Generator of petroleum refining industry listed wastes, EPA Hazardous Waste Nos. K048 and K051 (Ref. 32, p. 1). On April 13, 1982, a citizen’s complaint record, documented by the LDNR Hazardous Waste Regulation, stated that the facility was in violation of the Hazardous Waste Management Plan for failing to notify the department of two spills. Review of the facility’s water quality records also showed a violation of their NPDES discharge allowances (Ref. 33, p. 1). On April 16, 1982, the LDNR Office of Environmental Affairs Water Pollution Control Division conducted a facility inspection. It was reported that a blowout of the waste heater recovery system caused a discharge of high temperature water with a light sheen that had entered the boat slip (Ref. 34, p. 1). On January 18, 1983, the Resource Conservation and Recovery Act of 1976 (RCRA) Compliance Inspection Report of the facility documented that the treatment ponds were used to contain wastes and sludge, and had a considerable amount of oily material contents (Ref. 35, p. 2). On April 13, 1984, the LDEQ-HWD conducted a facility inspection and reported that the treatment ponds continued to receive waste from storage cleanups (Ref. 36, p. 1). On October 22, 1985, a RCRA inspection of the facility documented that nine drums were used to contain sludge/oil waste and were stored adjacent to the API separator. It was also noted that spills were observed around the API separators and within tank batteries, and several piles of sludge tank bottoms were deposited on the east and north sides of the north tank battery (West Facility’s Tank Battery) (Ref. 37, pp. 2-3). Hazardous substances found on the site may be attributed to previous site operations. The substances include benzene, ethylbenzene, styrene, toluene, xylenes (total), 2methylnaphthalene, naphthalene, arsenic, barium, chromium, copper, lead, manganese, mercury, nickel, vanadium, and zinc, which have been detected at levels equal to or greater than their corresponding SQLs (see Source Nos. 1-3 in this documentation record) Crude oil (petroleum) is a complex mixture of hundreds of chemical compounds, primarily composed of hydrocarbons such as benzene, ethylbenzene, toluene, and xylenes. Naphthalene and 2-methylnaphthalene are derived from naphtha, which is a crude oil distillation fraction (Ref. 39, pp. 2, 7, 13; Ref. 43, pp. 7-9). 76 SWOF-Observed Release Chromium is used commonly at refineries as a catalyst for halogenation, alkylation, and catalytic cracking of hydrocarbons (Ref. 41, p. 11). Chromium is also used in reforming or aromatization, which is the process of obtaining higher-octane levels from naphthas (Ref. 40, pp. 2-3). Barium, mercury, and nickel (nickel carbonyl) are also used as a catalysts in the petroleum industries (Ref. 41, p. 6; Ref. 42, pp. 3-5). Zinc (zinc chloride) is liberated from petroleum refining operations (Ref. 41, p. 16). Crude oil and unprocessed gas condensates contain significant amounts of suspended mercury compounds, mostly mercuric sulfide. The dominant dissolved species in petroleum are elemental mercury and ionic halides. (Ref. 44, pp. 2, 4-6). Analytical results of samples collected from storage tanks and soils during the 1999 START SI revealed elevated levels of arsenic, copper, lead, manganese, and vanadium (see Source Nos. 1-3 in this documentation record). These other hazardous substances may be present as a result of the facility’s attempt to process other substances besides crude oil or are often found as impurities in crude oil (Ref. 43, p. 2). On April 21, 1987, information provided by local residents and from a site inspection conducted by LDEQ-HWD reported that storage tanks adjacent to the treatment ponds contained from 9 to 56 inches of hazardous wastes. Information was also provided that the facility had received styrene, which it had tried to process, causing serious problems within the refinery and ultimately leading to its closure (Ref. 38, p.1). The materials present in the sources defined for the Talen’s Landing Bulk Plant site are CERCLA hazardous substances. In the definition of hazardous substance, §101 (14) of CERCLA provides that “[t]he term does not include petroleum, including crude oil or any fraction thereof which is not otherwise specifically listed or designated as a hazardous substance under subparagraph (A) through (F) of this paragraph...”. This provision has been termed the “petroleum exclusion.” In a number of policy statements since CERCLA was enacted, EPA has presented a generally accepted interpretation of the petroleum exclusion. In a December 1982 memorandum, EPA’s Office of General Council (OGC) determined that if hazardous substances have been added to petroleum such that the petroleum and hazardous substances are commingled to the extent that it is not practical to separate the substances, the entirety of the resulting material is a hazardous substance subject to CERCLA authority (Ref. 45, p. 3). This policy was reiterated in EPA’s April 1985 final rule adjusting CERCLA reportable quantities (Ref. 46, p.1 ). In an OGC opinion (dated July 31, 1987), EPA clarified this policy and determined that the petroleum exclusion does not apply to hazardous substances that are either added to petroleum or increase in concentration solely as a result of use of petroleum (Ref. 47, p. 4). These EPA determinations interpreting the petroleum exclusion have been upheld in numerous court decisions. For example, in its decision in US v. Western Processing (1991), the U.S. district court concluded that storage constitutes a “use” of petroleum products, as that term is applied in the July 1987 OGC opinion. The district court went on to conclude that tank bottom sludge resulting from storage is a contaminated waste product, and not a petroleum fraction, as that term is used in CERCLA. The district court reasoned that, if metals had leached from the storage tank walls into the petroleum, this would constitute the addition of CERCLA hazardous substances to the petroleum. These substances would not be subject to the petroleum 77 SWOF-Observed Release exclusion. The court further reasoned that carbon occluded from petroleum storage tank walls had combined with metals and PAHs indigenous to the petroleum and had formed a sludge. The court ruled that, although the material in the sludge had originated from petroleum, the sludge itself was a “waste,” not a “petroleum fraction,” and was, therefore, not exempt from CERCLA under the petroleum exclusion (Ref. 48, pp. 1-30). In the case of the TLBP site, styrene, a CERCLA hazardous substance, was added to the petroleum stored and processed at the facility. The sludge that resulted from this is subject to CERCLA authority. Styrene was detected in a sludge sample collected from Tank T01 in Source 1 and in two of three surface soil samples collected from Source 2, an area of contaminated soil in the bermed area within which Tank T01 is located. Based on the presence of styrene, it can be concluded that styrene was added to the petroleum stored in Tank T01. After being added, the styrene polymerized and formed a sludge consisting of styrene and indigenous components of the petroleum, many of which are CERCLA hazardous substances, including the metals used to established an observed release in the nearby wetlands. The presence of styrene in Source 2, located along the overland flow path between Tank T01 and the wetland and in the area from which liquid was observed seeping out of the berm toward the wetland, supports attribution of the metals in the observed release to hazardous substances present in sources at the site, namely hazardous substances present in the contaminated sludge (Fig. 3)(Ref. 9, p. 6; Ref. 11, pp. 14, 28, 58-59, 65; Ref. 13, pp. 11, 20, 21, Photograph Nos. 122, 216-218; p. 45, Photograph No. 106; Ref. 12, pp. 38-40, 42, 50, 119-120, 122-124, 214-215; Ref. 14, p. 22; Ref. 38, p.1). Another plant exists within the target radius of the TLBP site. The Spirit 76 Energy Plant (Jupiter Plant), a division of Unocal, is located 1,200 feet northeast of the TLBP site. The plant prepares for sale natural gas that it receives, via pipeline, from an offshore drilling facility. Once the gas arrives at the Jupiter Plant, it goes through a “Mole Sieve Process”, also known as a bead bed, which separates liquid, like water, from the gas in order to get the gas and liquid to a certain pound per square inch ratio that the buyer specifies. After the process is complete, another pipeline transports the finished product to where the gas is bought. The gas is only owned by the Jupiter Plant when it is on their property. The plant’s operations are not attributable to the contamination documented at the wetlands because the plant is not a petroleum refinery nor manufactures or accepts crude oil, liquid petroleum products or any similar substances as those associated with the TLBP site. (Ref. 49, p. 1). Observed Release Factor Value: 550 78 SWOF-Containment 4.1.2.1.2 Potential to Release 4.1.2.1.2.1 Potential to Release by Overland Flow Due to the observed release that was documented in the Likelihood of Release (Section 4.1.2.1.1 of this documentation record), the Potential to Release by Overland Flow will not be scored (Ref. 1, Section 4.1.2.1.1). Containment Factor Value: NS 79 SWOF/Drinking-Toxicity/Persistence 4.1.2.2 WASTE CHARACTERISTICS 4.1.2.2.1 Toxicity/Persistence There are no surface water intakes (drinking) located within the 15-mile TDL arc (Ref. 11, p. 101; Ref. 21, p. 1). Therefore, the Drinking-Toxicity/Persistence will not be scored. Drinking -Toxicity/Persistence Factor Value: NS 80 SWOF/Food Chain - Toxicity/Persistence/Bioaccumulation 4.1.3.2 HUMAN FOOD CHAIN THREAT - WASTE CHARACTERISTICS 4.1.3.2.1 Toxicity/Persistence/Bioaccumulation Hazardous Substance Source No. Toxicity Factor Value Persistence Factor Value* Toxicity/ Persistence Factor Value (Table 4-12) Bioaccumulation Factor Value** Toxicity/ Persistenc e/ Bioaccumulation Factor Value (Table 4-16) TCL Volatiles Benzene 1, 2, 3 100 0.4 40 5,000 2 x 10 5 Ethylbenzene 1, 2, 3 10 0.4 4 50 200 Styrene 1, 2, 3 10 1 10 50 500 Toluene 1, 2, 3 10 0.4 4 50 200 Xylenes (total) 1, 2, 3 10 1 10 50 500 2-Methylnaphthalene 1, 3 --- 0.4 --- 5,000 --- Naphthalene 1, 3 100 0.4 40 500 2 x 10 4 Arsenic 1, 2 10,000 1 10,000 500 5x10 6 Barium 1, 2 10,000 1 10,000 0.5 5,000 Chromium 1, 2 10,000 1 10,000 500 5x10 6 Copper 1, 2 --- 1 --- 50,000 --- Lead 1, 2 10,000 1 10,000 5,000 5 x 10 7 Manganese 1, 2 10,000 1 10,000 0.5 5,000 Mercury 1, 2 10,000 0.4 4,000 50,000 2 x 10 8 Nickel 1, 2 10,000 1 10,000 500 5x10 6 Vanadium 1, 2 100 1 100 0.5 50 Zinc 1, 2 10 1 10 50,000 5x10 5 Reference Ref, 1, Tables 4-12, 4-16; Ref. 2, pp. 1-13 TCL Semivolatiles TAL Metals --- : * : ** : No value found in SCDM. Persistence values assigned are based on “River.” Bioaccumulation values are assigned based on the surface water category of fresh and salt waters. The hazardous substance with the highest Toxicity/Persistence/Bioaccumulation Factor Value is mercury. Toxicity/Persistence/Bioaccumulation Factor Value: 2 x 108 81 SWOF/Food Chain-Hazardous Waste Quantity 4.1.3.2.2 Hazardous Waste Quantity Source Number Source Hazardous Waste Quantity Value (Section 2.4.2.1.5) Is Source Hazardous Constituent Quantity Data Complete? (yes/no) 1 301.80 No 2 >0 No 3 1 No TOTAL >302.80 The sum of the source hazardous waste quantity values is assigned as the Hazardous Waste Quantity Factor Value (Ref. 1, Sec. 2.4.2.2). The sum of the source hazardous waste quantity values for Surface Water Pathway, rounded to the nearest integer, is >302.80. For a Hazardous Waste Quantity range of greater than 100 to 10,000, a value of 100 is assigned from Ref. 1, Table 2-6 for the migration pathway (Ref. 1, Sec. 2.4.2.2, Table 2-6). Level II concentrations have been documented by chemical analyses to the surface water overland flow-environmental threat. This could also serve as the basis for assigning a value of 100 for the hazardous waste quantity factor value. See Section 4.2.4 for documentation of the observed release. Sum of Values: >302.80 Hazardous Waste Quantity Assigned: 100 82 SWOF/Food Chain-Hazardous Waste Quantity 4.1.3.2.3 Waste Characteristics Factor Category Value The waste characteristics factor category value is assigned based on the Waste Characteristics Product. The Waste Characteristics Product is the product of the Toxicity/Persistence Factor Value, the Hazardous Waste Quantity Factor Value, and Bioaccumulation Potential Factor Value. Values from the substance with the highest Toxicity/Persistence/Bioaccumulation factor value for the watershed mercury will be used. Toxicity/Persistence Factor Value: 4,000 × Hazardous Waste Quantity Factor Value: 100 (Toxicity/Persistence × Hazardous Waste Quantity): 4,000 X 100 = 4 x 105 Bioaccumulation Potential Factor Value: 50,000 (Toxicity/Persistence × Hazardous Waste Quantity) × Bioaccumulation Potential Factor Value: (4 x 105) X (50,000) = 2.0 X 1010 A Waste Characteristics Product value of 2.0 X 1010 receives a waste characteristics factor value of 320 (Ref. 1, Table 2-7). Hazardous Waste Quantity Assigned Value: 100 Waste Characteristics Factor Category Value: 320 83 SWOF/Food Chain-Targets 4.1.3.3 HUMAN FOOD CHAIN THREAT-TARGETS 4.1.3.3.1 Food Chain Individual A food chain individual factor value of 20 is assigned based on an observed release by chemical analyses of arsenic, copper, mercury, nickel, and zinc with a Bioaccumulation Factor Value of 500 or greater to sediments within the surface water target distance limit, and due to the fact that a fishery is present within the 15-mile TDL of the inwater segment (see Sec. 4.1.3.2.1)(Ref. 1, Sec. 4.1.3.3.1; Ref. 2, pp. 1-13; Ref. 11, p. 101; Ref. 16, pp. 4-5; Ref. 19, p. 1; Ref. 22, p. 1). Food Chain Individual Factor Value: 20 84 SWOF/Food Chain-Targets 4.1.3.3.2 Population The Population Factor for the watershed is based on three factors: Level I concentrations, Level II concentrations, and potential human food chain contamination. 4.1.3.3.2.1 Level I Concentrations There are no Level I concentrations established because there were no tissue samples collected, and surface water and sediment samples cannot be used to establish Level I concentrations (Ref. 3, p. 5). 4.1.3.3.2.2 Level II Concentrations No Level II concentrations have been established within a fishery. 85 SWOF/Food Chain-Potential Human Food Chain Contamination 4.1.3.3.2.3 Potential Human Food Chain Contamination Recreation fishing is common in the area and has been documented by START at the TMF facility (Ref. 14, p. 5). Commercial fishing is also conducted within the 15-mile TDL arc for both freshwater and marine species including: catfish, buffalo (fish), blue crabs, paddlefish, and white shrimp. Grand Lake is the primary commercial fishing grounds for those species in Cameron Parish. The LDWF does not keep records on pounds of fish caught and consumed annually per water body (Ref. 11, p. 100; Ref. 16, pp. 4-5; Ref. 19, p. 1; Ref. 22, p. 1). It will be assumed that at least more than zero (>0) and less than 100 (<100) pounds per year are consumed annually (Ref. 1, Tables 4-13, 4-18). Flow in cubic feet per second (cfs) and depth characteristics are not applicable in the evaluation of coastal tidal waters (Ref. 1, Table 4-13). Identit y of Fisher y Grand Lake Annual Production (pounds) >0 - <100 Type of Surface Water Body Average Annual Flow Population Value (P i) Dilution Weight (Di) P ixDi Reference Coastal Tidal waters Not Applicable 0.03 0.0001 0.000003 Ref. 1, Tables 4-13, 4-18; Ref. 11, p. 100; Ref. 16, pp. 45; Ref. 19, p. 1; Ref. 22, p. 1 Sum of Pi x Di: 0.000003 (Sum of Pi x Di)/10: 0.0000003 Potential Human Food Chain Contamination Factor Value: 3.0 x 10-7 86 SWOF/Food Chain-Population Factor Value 4.1.3.3.2.4 Calculation of Population Factor Value The population factor value is equal to: Level I Concentrations (0) + Level II Concentrations (0) + Potential Human Food Chain Contamination (0.0000003) = 0.0000003. A value of 3 x 10-7 is assigned as the Population Factor Value. Population Factor Value: 3.0 x 10-7 87 SWOF/Food Chain-Targets Factor Category Value 4.1.3.3.3 Calculation of Human Food Chain Threat - Targets Factor Category Value The Human Food Chain Threat - Targets Factor Category value is calculated by summing the food chain individual and population factor values for the watershed: Food Chain Individual + Population Factor = 20 + 0.0000003 = 20.0000003 Targets Factor Category Value: 20.0000003 88 SWOF/Environment-Toxicity/Persistence/Bioaccumulation 4.1.3.4 Calculation of Human Food Chain Threat Score for a Watershed The Human Food Chain Threat score is calculated by multiplying the human food chain threat factor category values for likelihood of release, waste characteristics, and targets for the watershed (Ref. 1, Section 4.1.3.3.3). Likelihood of Release (550) × Waste Characteristics (320) × Targets (20.0000003) = 3,520,000 (rounded to the nearest integer). This product is then divided by 82,500: 3,520,000 ÷ 82,500 = 42.67 The resulting value, subject to a maximum of 100, is assigned as the Human Food Chain Threat Score. Human Food Chain Threat Score: 42.67 89 SWOF/Environment-Toxicity/Persistence/Bioaccumulation 4.1.4.2 ENVIRONMENTAL THREAT - WASTE CHARACTERISTICS 4.1.4.2.1 Ecosystem Toxicity/Persistence/Bioaccumulation Hazardous Substance Ecosyste m Toxicity Factor Value** Persistenc e Factor Value* Ecosyste m Bioaccumulation Value** Ecosystem Toxicity/ Persistence Factor Value Ecosystem Toxicity/ Persistence/ Bioac -cumulation Factor Value TCL Volatiles Benzene 7 1,000 0.4 50,000 400 2 x 10 Ethylbenzene 100 0.4 50 40 2,000 Styrene 100 0.4 50 40 2,000 Toluene 100 0.4 50 40 2,000 Xylenes (total) 100 0.4 500 40 20,000 2-Methylnaphthalene 1,000 0.4 5,000 400 2 x 10 6 Naphthalene 1,000 0.4 5,000 400 2 x 10 6 Arsenic 100 1 500 100 5 x 10 4 Barium 1 1 0.5 1 0.5 Chromium 100 1 5 100 500 Copper 100 1 50,000 100 5 x 10 6 1,000 1 5,000 1,000 5 x 10 6 --- 1 50,000 --- --- Mercury 10,000 0.4 50,000 4,000 2 x 10 8 Nickel 1,000 1 500 1,000 5 x 10 5 --- 1 0.5 --- --- 100 1 50,000 100 5 x 10 6 Reference Ref. 1, Tables 420, 4-21; Ref. 2, pp. 1-13 TCL Semivolatiles TAL Metals Lead Manganese Vanadium Zinc * Persistence Values assigned are based on the predominant surface water body "River." ** Ecosystem Toxicity and Ecosystem Bioaccumulation values assigned are based on "fresh and salt waters." --- No value in SCDM The contaminant with the highest Ecosystem Toxicity/Persistence/Bioaccumulation Factor Value is mercury (Ref. 1, Table 4-21; Ref. 2, pp. 1-13). Ecosystem Toxicity/Persistence/Bioaccumulation Factor Value: 2 x 108 90 SWOF/Environment-Hazardous Waste Quantity 4.1.4.2.2 Hazardous Waste Quantity Source Number Source Hazardous Waste Quantity Value Is Source hazardous Consistent Quantity Data Complete (Yes/No) 1 301.80 No 2 >0 No 3 1 No Total >302.80 The sum of the source hazardous waste quantity values is assigned as the Hazardous Waste Quantity Factor Value (Ref. 1, Sec. 2.4.2.2). The sum of the source hazardous waste quantity values for Surface Water Pathway, rounded to the nearest integer, is >302.80. For a Hazardous Waste Quantity range of greater than 100 to 10,000, a value of 100 is assigned from Ref. 1, Table 2-6 for the migration pathway (Ref. 1, Sec. 2.4.2.2, Table 2-6). Level II concentrations have been documented by chemical analyses to the surface water overland flow-environmental threat. This could also serve as the basis for assigning a value of 100 for the hazardous waste quantity factor value. See Section 4.2.4 for documentation of the observed release. Sum of Values: >302.80 Hazardous Waste Quantity Factor Value: 100 91 SWOF/Environment-Hazardous Waste Quantity 4.1.4.2.3 Waste Characteristics Factor Category Value A Waste Characteristics Factor Category Value is assigned based on the Waste Characteristic Product. The Waste Characteristic Product is the product of the Ecosystem Toxicity/Persistence/ Factor Value, the Hazardous Waste Quantity Factor Value, and the Ecosystem Bioaccumulation Potential Factor Value. According to HRS Table 4-20, the Ecosystem Toxicity/Persistence value for mercury is 4,000. A Hazardous Waste Quantity Factor Value of 100 is assigned from the sum of Source Hazardous Waste Quantity Value and the documented observed release (Ref. 1, Section 2.4.2.2, Table 2-6). Ecosystem Toxicity/Persistence Factor Value = 4,000 Hazardous Waste Quantity Factor Value = 100 4,000 × 100 = 4.0 × 105 (Subject to a maximum product of 1.0 x 108) According to Table 4-21, the Ecosystem Bioaccumulation Potential Factor Value for mercury is 50,000 (Ref. 2, p. 8). Ecosystem Bioaccumulation Potential Factor Value = 50,000 (Ecosystem Toxicity/Persistence × Hazardous Waste Quantity) × Bioaccumulation Potential Factor Value: (4.0 × 105) × (50,000) = 2 ×1010 (Subject to a maximum product of 1 x 1012) A Waste Characteristics Product Value of 2 x 10 10 receives a Waste Characteristic Factor Value of 320 (Ref. 1, Table 2-7). Ecosystem Toxicity/Persistence Factor Value × Hazardous Waste Quantity Factor Value: 2 × 1010 Waste Characteristics Factor Value: 320 92 SWOF - Environment Targets 4.1.4.3 ENVIRONMENTAL THREAT - TARGETS 4.1.4.3.1 Sensitive Environments 4.1.4.3.1.1 Level I Concentrations No water, or benthic, or tissue samples have been collected within the Surface Water Pathway; therefore, no Level I concentrations can be established (Ref. 3, p. 5). Level I Concentrations Factor Value: 0 93 SWOF/Environment - Potential Contamination 4.1.4.3.1.2 Level II Concentrations Level II concentrations have been established in the wetlands by chemical analyses of sediment samples that met observed release criteria. The segment subject to Level II contamination is approximately 1 mile and was determined by extrapolating the perimeter of the wetland starting at PPE3 to the farthest wetland sample (Sample No. TLE-SD6-AG) that met the observed release criteria (Fig. 8) (Ref. 3, pp. 1-4; Ref. 11, p. 101; Ref. 15, pp. 1-3; Ref. 18, p. 3; Ref. 50, pp. 1-2). A value of 25 is assigned from Table 4-24 of the HRS for length of wetlands from 0.1 to 1 mile (Ref. 1, Sec. 4.1.4.3.1.2). The Level II concentration factor value is the sum of the wetlands value (25) and sensitive environments value (0): 25 + 0 = 25 Sum of Sensitive Environments Value + Wetland Value: 25 94 4.1.4.3.1.3 Potential Contamination Sensitive Environments Information provided by the LDWF Habitat Section of the Fur and Refuge Division, indicates that the paddlefish (Polydon spathula) is a rare, threatened, and/or endangered species in the State of Louisiana and it is found within the 15-mile TDL arc of the site (Ref. 20, p. 1). Numerous waterbird nesting colonies, exemplary freshwater marshes, blue water lily (Nymphaea elegans), American Peregrine Falcon (Falco peregrinus anatum), West Indian Manatee (Trichechus manatus), Brown Pelican (Pelecanus occidentalis), Piping Plover (Charadrius melodus), Loggerhead Sea Turtle (Caretta caretta), and Black-capped Vireo (Vireo atricapillus) also occur within the 15-mile TDL arc search area. Grand Lake and Mermentau River are the primary remaining habitats for the paddlefish in Louisiana (Ref. 16, p. 4; Ref. 22, p. 1; Ref. 23, p. 1). Grand Lake is located approximately 0.5 mile from the site. Also located within the search area is the Lacassine National Wildlife Refuge, approximately 10 miles west of the site. (Ref. 5, pp. 1-5; Ref. 11, p. 101; Ref. 18, pp. 1-13). Type of Surface Water Body Sensitive Environment Reference Sensitive Environment Value (Ref. 1, Table 4-23) Intracoastal Waterway/ Coastal Tidal Area Lacassine Wildlife Ref. 11, p. 101; Ref. 20, p. 1 75 Intracoastal Waterway/ Coastal Tidal Area Paddlefish habitat Ref. 11, p. 101; Ref. 20, p. 1 50 Intracoastal Waterway/ Coastal Tidal Area American Peregrine Falcon Ref. 23, p. 1 50 Intracoastal Waterway/ Coastal Tidal Area West Indian Manatee Ref. 23, p. 1 50 Intracoastal Waterway/ Coastal Tidal Area Brown Pelican Ref. 23, p. 1 50 Intracoastal Waterway/ Coastal Tidal Area Piping Plover Ref. 23, p. 1 50 Intracoastal Waterway/ Coastal Tidal Area Loggerhead Sea Turtle Ref. 23, p. 1 50 Intracoastal Waterway/ Coastal Tidal Area Black-capped Vireo Ref. 23, p.1 50 Total 475 Wetlands There are numerous designated wetlands within the 15-mile TDL arc. According to the National Wetlands Inventory Maps, there are more than 20 linear miles of HRS-eligible wetland frontage within the 15-mile TDL arc (Ref. 3, pp. 1-4; Ref. 18, pp. 1-12). 95 SWOF/Environment - Potential Contamination Type of Surface Water Body Wetland Frontage Reference Wetland Value (Table 4-24) Wetlands > 1 to 2 miles Ref. 18, pp. 1-13 50 Intracoastal Waterway/ Coastal Tidal Area >20 miles Ref. 11, p. 101; Ref. 18, pp. 1-13 500 TOTAL 550 To obtain the Potential Contamination Factor Value, the sum of the sensitive environments value is added to the wetland value, which is then multiplied by the assigned dilution for each in-water segment. This value is then divided by 10 to obtain the Potential Contamination Factor Value (Ref. 1, Section 4.1.4.3.1.3) Type of Surface Water Body Sum of Sensitive Environment Values (Sj) Wetland Frontage Value (Dj) Adjusted Dilution Weight (Aj) Aj(Dj + Sj) Wetlands 0 50 0.1 5 Intracoastal waterway/ Coastal Tidal Area 475 500 0.0001 0.0975 TOTAL 5.0975 Sum of Sensitive Environments Value + Wetland Value: 5.0975 Potential Contamination Factor Value: 0.50975 96 SWOF/Environment - Factor Category Value 4.1.4.3.1.4 Environmental Threat - Targets Factor Category Value The environmental threat target factor category value for the watershed is the sum of the values for the Level I (0), Level II (25), and Potential Contamination factors (0.50975) (Ref. 1, Section 4.1.4.3.1.4). 0 + 25 + 0.50975 = 25.50975 4.1.4.4 Calculation of Environmental Threat Score The environmental threat score is calculated by multiplying the environmental threat factor category values for likelihood of release (550), waste characteristics (320), and targets (25.50975) for the watershed; rounding the product to the nearest integer; and dividing by 82,500. The resulting value (54.42), subject to a maximum of 60, is assigned as the environmental threat score for the watershed (Ref. 1, Sections 4.1.4.4 and 4.1.4.3.1.4). Calculations: 550 × 320 × 25.50975 = 4,489,716 ÷ 82,500 = 54.42 (subject to a maximum of 60) 4.1.5 Calculation of Overland/Flood Migration Component Score For a Watershed The overland/flood migration component score for the watershed is calculated by summing the scores for the drinking water threat (0), human food chain threat (42.67), and environmental threat (54.42). The resulting score, subject to a maximum value of 100, is assigned as the surface water overland/flood migration component score for a watershed (Ref. 1, Section 4.1.5). Calculations: 0 + 42.67 + 54.42 = 97.09 (subject to a maximum value of 100) 4.1.6 Calculation of Overland/Flood Migration Component Score The highest surface water overland/flood migration component score from the watersheds evaluated (in this case, only one watershed was evaluated) is selected and assigned as the surface water overland/flood migration component score for the site, subject to a maximum of 100. The overland/flood migration component score is assigned a value of 97.09 (Ref. 1, Section 4.1.6). 97 SWOF-Migration Component 4.2 GROUND WATER TO SURFACE WATER MIGRATION COMPONENT This component was not scored because an observed release was documented for the overland flow/flood component. 4.3 CALCULATION OF SURFACE WATER MIGRATION PATHWAY SCORE The overland/flood migration component was scored and this value (97.09) is assigned to the surface water migration pathway score. Ground Water to Surface Water Factor Value: NS Surface Water Migration Pathway Score: 97.09 98 Soil-General 5.0 SOIL EXPOSURE PATHWAY 5.0.1 GENERAL CONSIDERATIONS Due to limited resident and nearby population, the pathway would result in a minimal score. Because evaluation of this pathway will not significantly affect the site score, it has not been scored. 99 Air-General 6.0 AIR MIGRATION PATHWAY 6.0.1 GENERAL CONSIDERATIONS Air samples were not collected during the SI field activities; therefore, an observed release to the air migration pathway cannot be documented. 100
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