hazardous materials report wespac lax pipeline, llceng2.lacity.org/techdocs/emg/docs/deir_a/appendix...

Hazardous Materials Report

WesPac LAX Pipeline, LLC

Los Angeles County, California USGS Inglewood, Long Beach, South Gate, Torrance

and Venice, California Quadrangles

August, 2007

Prepared for: Christopher A. Joseph & Associates

Los Angeles Office 11849 W. Olympic Blvd., Suite 101

Los Angeles, CA 90064 Phone: (310) 469-6739

Fax: (310) 473-9336

Prepared by:

Companies, Inc. 21 Technology Drive

Irvine, California 92618 949–727–9336

Wespac LAX Pipeline Hazardous Materials Report 8/30/2007

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TABLE OF CONTENTS

1.0 INTRODUCTION ............................................................................................1

2.0 ENVIRONMENTAL BASELINE AND REGULATORY SETTING....................1

2.1 ENVIRONMENTAL SETTING..................................................................1

2.2 LAND USE...............................................................................................2

2.3 EXISTING HAZARDOUS MATERIALS SITES ALONG PIPELINE ROW 3

2.4 APPLICABLE REGULATIONS, PLANS, AND STANDARDS ................12

2.5 HAZARDOUS WASTE REQUIREMENTS.............................................14

2.6 HAZARDOUS MATERIAL WORKER SAFETY .....................................14

3.0 EXPOSURE PATHWAYS AND MITIGATION MEASURES .........................15

3.1 SIGNIFICANCE CRITERIA ....................................................................16

3.2 PROPOSED SAFETY MEASURES.......................................................16

3.3 WORKER/PUBLIC SAFETY IMPACTS AND EXPOSURE MITIGATION:

PROPOSED MEASURES............................................................................18

4.0 REFERENCES .............................................................................................23

LIST OF TABLES Table 1: Land Use Percentages Along Proposed and Alternate Routes ............................. 2 Table 2: Databases Searched and Potential Impact Ranking.............................................. 4 Table 3: Hazardous Waste Sites with High and Medium Potential to Impact the Project . 7

LIST OF APPENDICES APPENDIX A HAZARDOUS SITES MAP


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1.0 INTRODUCTION

This report addresses the environmental setting and impacts related to the construction of the proposed project and Broadway alternative. Specifically, this report provides a description of the contaminants that could potentially be encountered in the ROW and construction areas during construction of the project. The primary issue is worker health and safety and minimizing public exposure to hazardous materials during construction and waste handling. This report provides preliminary guidelines and mitigation measures for hazardous materials handling to limit exposure to workers and the public.

2.0 ENVIRONMENTAL BASELINE AND REGULATORY SETTING

2.1 ENVIRONMENTAL SETTING The proposed project and alternative pipeline routes traverse land utilized for a variety of uses including: residential housing and community services, recreation facilities such as parks and golf courses, retail/commercial uses, vacant lands, oil production and storage, and industrial activities. Existing and past land use activities are used as potential indicators of hazardous material storage and use. For example, many industrial sites, historic and current, are known or suspected to have soil or groundwater contamination by hazardous substances. Properties devoted to oil production, including oil fields and processing facilities, are commonly known or suspected to have environmental contamination from petroleum hydrocarbons, heavy metals, and chlorinated solvents. Other hazardous materials sources include leaking underground storage tanks in commercial and industrial areas, surface runoff from contaminated sites and migration of contaminated groundwater plumes to the pipeline route, and application of pesticides and herbicides on recreational or agricultural land. Specifically, contamination from the following sources may be encountered during pipeline construction:

• Petroleum hydrocarbons from spills or naturally occurring oil sources, resulting in releases of gasoline, diesel fuel, and oil into the soil and groundwater.

• Volatile organic compounds/chlorinated compounds from tank leaks or

spills, facility operations, and dry cleaners using tetrachloroethene and/or trichloroethene.

• Polychlorinated biphenyls from industrial facility operations, transformers,

and natural gas line leaks.

• Metals, such as lead, arsenic, and chromium, including naturally occurring, or leaded gasoline tank and pipeline spills or leaks, metal finishing operations, aerial deposition, and industrial facility operations.


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• Asbestos from water pipe, drain pipe, steam pipe insulation, and water pipe insulation, from transite pipe or building insulation.

Sites with known or suspected contamination were identified along the proposed pipeline routes to better define the areas where hazardous waste may impact construction activities. Potential impacts on air quality and traffic during waste transport must also be considered. Where encountered, contaminated soil may qualify as hazardous waste and thus require handling and disposal according to local, state, and federal regulations.

2.2 LAND USE Land use activities associated with hazardous substances along the alignment include industrial, oil production/storage, and commercial (such as dry cleaners, automotive repair, and gas stations). Land uses of concern were identified along the proposed route by review of a standard environmental record source that contained information on sites in regulatory agency databases. A summary of the percentage of land use categories along the proposed and alternative routes is presented in Table 1. Following is a general discussion of the land use concerns along the proposed route and alternate segments of the proposed project. The proposed route and alternate segments will be located in existing roads or utility rights-of-way.

Table 1: Land Use Percentages Along Proposed and Alternative Route

Route Commercial Industrial Residential Hospital School Park / Open

Space Proposed Route 17% 66% 9% 0% 0.3% 7% Broadway Alternative Route

14% 68% 10% 0% 0% 8%

The proposed project and alternative route pass through a mixture of industrial, commercial, and residential areas. Industrial uses include oil production service companies, aircraft maintenance and support terminals, cargo and freight hubs, asphalt manufacturing, plating and chemical companies, and landfills/transfer stations. Based on the Environmental Data Resources (EDR) search, the proposed route also passes directly west of the Ascon Landfill and the Alameda Street Sanitary Landfill, and south of the American Waste Systems and Coastal Material Recovery transfer stations, which are also classified as solid waste facility/landfills. Commercial uses such as dry cleaners, gas stations, waste transfer stations, and automotive repair are common along the route.

The majority of the Broadway Alternative segment is located in unincorporated Los Angeles County, and the cities of Los Angeles and Hawthorne. Land use activities along the Broadway Alternative are principally associated with automobile service, light industrial, salvage, gas service stations, a golf course, and residential land uses. Furthermore, one school and three licensed healthcare facilities would be avoided through the utilization for the Broadway Alternative.


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2.3 EXISTING HAZARDOUS MATERIALS SITES ALONG PIPELINE ROW A preliminary assessment was performed to identify potential sites that could impact construction due to the presence of toxic or hazardous substances, and principally contaminated soil. The preliminary assessment consisted of a database search and creation of a figure to visually capture the site’s proximity to the ROW, and synthesis of the data. EDR database searches were conducted in order to identify sites with the potential to impact project construction. Standard EDR radii provide information obtained from numerous databases (Table 2) supplied by local, state, and federal agencies with varying levels of enforcement over the generation, storage and handling, transportation, and treatment of wastes, as well as emergency response for and remediation of contaminated soil and groundwater. Regulatory agencies also keep detailed hard copy records at their respective field or regional offices, which the public can review (often by appointment). These agency records were not reviewed for this report, due to the fact that the EDR search alone provided sufficient information to identify potential sites that could impact project construction. The EDR search, however, does not contain detailed information that the regulatory agency typically has at its office in the form of site assessments, remediation work-plans, historical laboratory analytical data, sampling plans, or other documentation regarding current or past contamination at a site. These records will be reviewed as project designs and route parameters are finalized. Agency records for sites with medium and high potential to contain contaminated soil (See Table 3) will be reviewed prior to construction in order to develop a soil sampling strategy. Soil sampling will be performed during construction. The purpose of the soil sampling is to provide construction management and personnel with accurate information on any contaminants existing within the pipeline ROW, in order to ensure that all contamination encountered within the ROW is handled in a safe and proper manner. Samples of the wastes should be collected and analyzed by Environmental Protection Agency SW-846 analytical test methods to determine the concentration of any contamination. Searches of federal, state, and local regulatory agency listings of sites with known or suspected hazardous material contamination were performed by EDR, dated January 24, 2007 for the proposed route, and April 24, 2007 for the Broadway alternative. Data were compiled for potentially contaminated sites only along the rights-of-way for the proposed route and alternative segment. The searches included databases from federal, state, and local records, tribal records, one proprietary record, and one county record. Table 2 lists these databases, the date of the most recent update, and the general ranking assigned by each type of site’s potential to impact the project.


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Table 2: Databases Searched and Potential Impact Ranking

Database Name Proposed Route

Most Recent Update

Rosecrans Alternative Most Recent Update

Ranking

Federal Databases Biennial Reporting System (BRS) 12/31/03 12/31/05 Low Brownfields Sites (US BROWNFIELDS) 10/17/06 01/29/07 High Clandestine Drug Labs (CDL) 12/01/06 12/01/06 Low Comprehensive Environmental Response, Compensation and Liability Information System (CERCLIS)

08/09/06 11/28/06 Medium

CERCLIS No Further Remedial Action Planned (CERCLIS-NFRAP)

10/10/06 12/20/06 Low

Corrective Action Report (CORRACTS) 09/27/06 01/04/07 Low Department of Defense Sites (DOD) 12/31/05 12/31/05 Low Department of Transportation, Office of Pipeline Safety Incident and Accident Data (DOT OPS)

N/A 02/14/07 Medium

Emergency Response Notification System (ERNS)

12/31/05 12/31/06 Medium

Engineering Controls Sites List (US ENG CONTROLS)

10/18/06 01/24/07 Low

Federal Insecticide, Fungicide, and Rodenticide Act/TSCA (FTTS [FIFRA/TSCA])

10/19/06 02/26/07 Low

FIFRA/TSCA Tracking System (FTTS INSP) 10/19/06 02/26/07 Low FIFRA/TSCA Tracking System Administrative Case Listing (HIST FTTS)

N/A 10/19/06 Low

Facility Index System/Facility Registry System (FINDS)

10/11/06 01/18/07 Low

Formerly Used Defense Sites (FUDS) 12/13/05 12/31/05 Medium Hazardous Materials Information Reporting System (HMIRS)

08/01/06 11/28/06 Low

Institutional Controls List (US INST CONTROLS)

10/18/06 01/24/07 Low

Integrated Compliance Information System (ICIS)

02/13/06 11/06/06 Low

Land Use Control Information System (LUCIS) 12/09/05 12/09/05 Low Material Licensing Tracking System (MLTS) 10/19/06 01/11/07 Low Mines Master Index File (MINES) 08/09/06 11/15/06 Low National Priorities List (Superfund) 09/27/06 01/25/07 High

Proposed NPL 09/27/06 09/27/06 Medium Delisted NPL 09/27/06 12/28/06 Low NPL Recovery 10/15/91 10/15/91 Low

Open Dump Inventory (ODI) 06/30/85 06/30/85 Low PCB Activity Database System (PADS) 10/17/06 10/17/06 Low Radiation Information Database (RADINFO) 11/03/06 01/30/07 Low Records of Decision (ROD) 10/07/06 01/10/07 Medium Resource Conservation and Recovery Act, Large Quantity Generators (RCRA-LQG)

06/13/06 06/13/06 Low

Resource Conservation and Recovery Act, Small Quantity Generators (RCRA-SQG)

06/13/06 06/13/06 Low

RCRA Administrative Action Tracking System 04/17/95 04/17/95 Low


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Database Name Proposed RouteMost Recent Update


Ranking

(RAATS) Section 7 Tracking Systems (SSTS) 12/31/04 12/31/04 Low Superfund Consent Decrees (CONSENT) 12/14/04 08/23/06 Medium Toxic Chemical Release Inventory System (TRIS)

12/31/04 12/31/04 Medium

Toxic Substances Control Act (TSCA) 12/31/02 12/31/02 Low Uranium Mill Tailings Sites (UMTRA) 11/04/02 12/31/05 Low State Databases Aboveground Petroleum Storage Tank Facilities (AST)

11/02/06 02/09/07 Low

Active UST Facilities (UST) 01/09/07 01/09/07 Low California Bond Expenditure Plan (CA BOND EXP. PLAN)

01/01/89 01/01/89 Low

California Hazardous Materials Incident Report System (CHMIRS)

12/31/04 12/31/05 High

Clandestine Drug Labs (CDL) 05/17/06 12/31/06 Low Cortese Hazardous Waste and Substances List (CORTESE)

04/01/01 04/01/01 High

Deed Restriction Listing (DEED) 10/04/06 01/15/07 Low Department of Toxic Substances Control, Site Mitigation and Brownfields Reuse Program (ENVIROSTOR)

11/28/06 02/27/07 High

Dry cleaning Facilities (DRYCLEANERS) 04/18/05 04/18/05 Low Emissions Inventory Data (EMI) 12/31/04 12/31/04 Low Facility Inventory Database (CA FID) 10/31/94 10/31/94 Medium Facility and Manifest Data (HAZNET) 12/31/05 12/31/05 Low Hazardous Substance Storage Container Database (HIST UST)

10/15/90 10/15/90 Low

Hist Cal-Sites (ENVIROSTOR) 08/08/05 08/08/05 High Leaking Underground Fuel Tank Report (LUST) 01/09/07 01/09/07 High Proposition 65 Records (NOTIFY 65) 10/21/93 10/21/93 Low Recycler Database (SWRCY) 01/08/07 01/08/07 Medium School Property Evaluation Program (SCH) 11/28/06 02/27/07 Medium Solid Waste Information System (SWF/LF [SWIS])

12/11/06 03/12/07 High

Statewide Environmental Evaluation and Planning System UST (SWEEPS UST)

06/01/94 06/01/94 Low

State Response Sites (RESPONSE) 11/28/06 02/27/07 High Statewide Spills, Leaks, and Cleanups (SLIC) 01/09/07 01/09/07 High Toxic Pits Cleanup Act Sites (TOXIC PITS) 07/01/95 07/01/95 High Voluntary Cleanup Program Properties (VCP) 11/28/06 02/27/07 High Waste Discharge System (CA WDS) 12/19/06 12/19/06 Low Waste Management Unit Database (WMUDS/SWAT)

04/01/00 04/01/00 Low

Well Investigation Program Case List (WIP) 10/25/06 03/01/07 Low Other Records (County, Tribal and Proprietary) Indian Reservations (INDIAN RESERV) 12/31/05 12/31/05 Low Indian LUST 09/07/06 12/19/06 High Indian UST 09/06/06 12/19/06 Low Manufactured Gas Plants N/A N/A Medium


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Database Name Proposed RouteMost Recent Update


Ranking

Industrial Waste and UST Sites (LA County HMS)

10/31/06 10/31/06 Low

The EDR record searches identified approximately 1,600 sites, of which only approximately 200 were along the proposed or alternative construction zones. The following screening criteria were used to rank the potential of individual sites to environmentally impact the project:

• Only those sites adjacent to or within the ROW were reviewed. The sites were then ranked based on the databases in which they were listed.

• The databases searched that typically indicate a confirmed release occurred at the

site were ranked as high. • Databases that reflect administrative records or permits related only to the use or

presence of hazardous material at the site were ranked as low. • Following this initial ranking, data for those sites that ranked with a possible high

potential to impact the construction area were individually reviewed to assess the contaminant type. Sites were individually ranked medium or high based on information available from the database, age of release, substance, case/remediation status, and database in which the listing appeared.

• Sites with unknown contaminants, contamination by substances other than

hydrocarbons (i.e., volatile organic compounds, methyl ethyl ketone, or metals) and transfer stations/landfills remained as high-potential-impact ranked sites.

• The rankings of those sites identified as being contaminated with hydrocarbons

were then downgraded to medium potential impact rather than high. Sites with hydrocarbon contamination were ranked lower than sites with unknown or other contaminants because WesPac has adopted standard operating procedures for working at sites with hydrocarbon contamination, such as required personal protective equipment (PPE) for hydrocarbon liquid/vapor exposure, site conditions that would trigger exposure monitoring, and threshold limit values/permissible exposure limits.

• Sites that have been closed, or for which no further action has been

required/deemed necessary, were ranked as low potential impact sites. • Sites with groundwater contamination only were ranked as low because project

construction impact area (trench depth) should not typically overlap with the


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water table (groundwater depth)1. A survey of the wells in or near the project area was performed, and historical high groundwater levels (recorded in this document as feet below ground elevation) were recorded. Generally, the potential to encounter groundwater is low, as most of the project is located in areas where groundwater has been historically recorded at or below 40 feet below ground level (Hydrology Report, TRC 2007). At this time, trench depth is not anticipated to exceed 6 feet along most of the route. The depth may be exceeded at bore locations and occasional utility crossings. If the potential for encountering groundwater exists at any specific site along the route, an agency file search will be conducted of the site’s data and the site’s potential impact will be analyzed prior to construction at the site. Any groundwater that is encountered can either be pumped out and treated, if necessary, on-site and then discharged to either the sewer system or the storm drain system under a National Pollution Discharge Elimination System permit, or it can be pumped out and hauled off-site to a permitted treatment facility.

Using the above screening criteria, agency-listed active hazardous waste sites adjacent to or within the ROW for the proposed project route and Broadway alternative with high and medium ranking are presented in Table 3. Regulatory agency-listed sites requiring no further action and sites ranked as low potential to impact the project are not presented in the table. Table 3 lists 41 sites with high or medium potential to impact the Proposed Route, and 10 sites for the Broadway Alternative. See Appendix A for a graphical representation of where these sites are in relation to the ROW.

Table 3: Hazardous Waste Sites with High and Medium Potential to Impact the Project

Map Number Site Name List1

Potential to Impact Project

Contamination Profile

Proposed Route Hazardous Materials Sites 1 American Waste Systems,

Inc Address also listed as “Alden Equipment Company”.

LUST, Cortese, ERNS, CHMIRS, ENVIROSTOR, SWF / LF, UST, AST, LA Co HMS, HAZNET, CA WDS

High Hydrocarbon and PCE contamination in groundwater. Case status unknown.

1 The Department of Water Resources-Southern District monitors wells to ascertain groundwater levels, but no wells were found near the project area. However, the County of Los Angeles Department of Public Works has been monitoring numerous wells in close proximity to the project since the early 1900s and this information is provided online at http://dpw2.co.la.ca.us/website/wells/viewer.asp.


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2 Stauffer Chemical Co. Address also listed as “Rhone-Poulenc Basic Chemicals” and “Rhodia Inc”.

LUST, SLIC, Cortese, CERCLIS, CA FID UST, SWEEPS UST, EMI, TRIS, HAZNET, LA Co HMS, RCRA-LQG, RCRA-TRDF

High MET, PET, PHC, VOC, and hydrocarbon contamination/spills. Case open.

3 Sonic Plating Co. Cortese, ENVIROSTOR, HIST UST, CERC-NFRAP, CA WDS, LA Co HMS, EMI, FINDS, HAZNET, RCRA-LQG

High Potential contaminants present onsite: *Organic liquids with metals *Other still bottom waste *Acid solution with PH<2 with metals *Unspecified acid solution *Unspecified alkaline solutions *Waste oil and mixed oil

4 Master Sun Cleaners

LUST, SLIC, US Brownfields

High VOC and PCE contamination. Case status unknown.

5 Virco Manufacturing Corp

LUST, SLIC, Cortese, HIST UST, CA FID UST, SWEEPS UST, ENVIROSTOR, CERC-NFRAP, FINDS, RCRA-LQG, FTTS

High Perchlorethylene and hydrocarbon contamination/spills. SLIC case open.

6 Coastal Material Recovery & Transfer Station Address also listed as “Barnes Group Property” and “Waste Resources Recovery.”

SLIC, SWF / LF High Unknown VOC contamination/spill.

7 375 West Compton Blvd Gardena, CA

LUST, SLIC High Unknown contamination/spill. PCE present in groundwater wells. Case status unknown.

8 Equilon Sulfur Recovery Plant Address also listed as “Shell Oil Products US”.

HIST UST, AST, ERNS, CHMIRS, LA Co HMS, EMI

High Sulfuric acid and hydrocarbon contamination/spill. Unknown amount asbestos present in soil.

9 23500 Alameda St Carson, CA 90749

ERNS, CHMIRS

High Sulfur dioxide contamination/spill. Case status unknown.


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10 Huntway Refining

WDS, EMI, HIST UST CERC-NFRAP, AST, CORRACTS, SLIC, RCRA-TSDF, TRIS, RCRA-LQG, CHMIRS, LUST, HAZNET, ERNS

High VOC contamination in soils. Hydrocarbon release.

11 Ascon Sanitary Landfill

SWF/LF, LUST High Unknown contamination/spill. Closed waste disposal site.

12 Sunshine Truck Stop

LUST, SLIC High Unknown contamination. Case open.

13 Rohm & Hass Address also listed as “Borden Inc: Thermoplastics Division”.

SLIC, LUST, SWEEPS UST, CERC-NFRAP, EMI, FINDS, RCRA-SQG, HAZNET

High VOC release. Case status unknown.

14 Shell – Carson Terminal

LUST, SLIC High VOC, PET, and hydrocarbons released onsite. Case open.

15 Alameda Street Sanitary Landfill

CERCLIS, FINDS, SWF / LF

High ESI ongoing. Solid waste disposal site.

16 LAX Fuel Corp Address also listed as LAX Fuel.

LUST, Cortese, CA FID UST, SWEEPS UST

Medium Hydrocarbon contamination/spill. Case status unknown.

17 Flying Tiger Cargo Terminal

HIST UST, UST, LUST, CORTESE, SLIC, CA FID UST, SWEEPS UST, EMI, HAZNET

Medium Hydrocarbon contamination. Case status unknown.

18 South Bay Petroleum Inc

LUST, HIST UST, Cortese, CA FID UST, SWEEPS UST


19 24 Glide Slope Address also listed as “LAX Hanger”, “FAA”, “Flight Service Station”, and “Rockwell International Flight Operations”.

HIST UST, LUST, Cortese, UST, SWEEPS UST, RCRA-SQG, FINDS

Medium Hydrocarbon contamination in soils. Case status unknown.

20 Kilroy Industries

LUST, Cortese, HIST UST, SWEEPS UST, UST, FINDS, EMI, LA Co HMS


21 Garrett Airesearch

LUST Medium Hydrocarbon contamination in soil. Case status unknown.


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22 Ralph’s Grocery Co.

LUST, Cortese, CA FID UST, ERNS, CHMIRS, SWEEPS UST, EMI, RCRA-SQG, FINDS, CA WDS, LA Co HMS TRIS, HAZNET

Medium Hydrocarbon contamination of soils. Case suspended for unknown reasons.

23 SFPP, LP Watson Station Address also listed as “Southern Pipeline Partners” and “Chevron USA Watson Terminal”.

HIST UST, CA FID UST, SWEEPS UST, CHMIRS, EMI, FINDS, HAZNET, RCRA-LQG, LA Co HMS

Medium Hydrocarbon release. Case status unknown.

24 Nalco Chemical

LUST, SLIC, Cortese, CHMIRS, ERNS, LA Co HMS, EMI, CA WDS, SSTS

Medium Aeromatic naphtha (hydrocarbon) release. Case status unknown.

25 Gene’s Texaco

LUST, Cortese, HIST UST, CA FID UST, SWEEPS UST, LA Co HMS

Medium Hydrocarbon contamination/spill. Case status unknown.

26 Dominguez Water Corp Address also listed as “California Water Service Company”.

LUST, Cortese, HIST UST, CA FID UST, SWEEPS UST, UST, LA Co HMS, HAZNET

Medium Unknown contamination/spill. Case status unknown.

27 Arco # 87

LUST, Cortese, HIST UST, SWEEPS UST

Medium Hydrocarbon contamination in soils and groundwater. Case open.

28 United Oil Co. # 55 Address also listed as “Lincoln Gas”

LUST, Cortese, SWEEPS UST, UST, HIST UST, CA FID UST

Medium Hydrocarbon contamination in soils and groundwater. Case status unknown.

29 Texaco Address also listed as “Cal Trans”.

LUST, Cortese, SWEEPS UST, HIST UST

Medium Hydrocarbon contamination in soil. Case status unknown.

30 D&D Shell

LUST, HIST UST, CA FID UST, SWEEPS UST, RCRA-SQG, FINDS, LA Co HMS


31 Crenshaw Village LUST, Cortese, SWEEPS UST


35 DSA Properties LUST, Cortese, EMI, LA Co HMS


36 Mobil Oil Corp S/S #18-MCB Address also listed as “Mobil Oil Corp. S/S # 18-MCE”.

LUST, Cortese, UST, HIST UST, HAZNET, RCRA-LQG

Medium Hydrocarbon contamination of soils and groundwater. Case open.


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37 Carmichael International Service

CHMIRS Medium Hydrocarbon release.

38 Rosecrans Strip Mall Property Address also listed as “Rosecrans Normandie Strip Mall”.

LUST, SLIC, US Brownfields

Medium Unknown contamination. PCE present in groundwater. Case Status unknown.

39 City of Gardena – Alpha Beta Property

LUST, SLIC Medium Unknown contamination. Case status unknown.

40 Dr Pepper Bottling Co

LUST, SLIC, CA FID UST, SWEEPS UST


41 Northrop Grumman

LUST, SLIC, ENVIROSTOR, CORRACTS, EMI, FINDS, RCRA-SQG

High VOC, PET, and SVO contamination. Case status unknown.

42 2010 El Segundo Blvd US Brownfields High Unknown. 43 Sierracin/Thermal Systems

LUST, Cortese High Unknown contamination of

soil. Case status unknown. 44 Interweb ENVIROSTOR,

Cortese, CERC-NFRAP, FINDS, RCRA-SQG

Medium Unknown. NFRAP.

45 Gasco # 579 Cortese High Unknown. 50 Hawthorne Automated

Flight Service LUST, Cortese, SWEEPS UST, UST, EMI, LA Co. HMS


Broadway Alternative Hazardous Materials Sites 32 Shell Service Station LUST, Cortese, HIST

UST,


33 Car Smog LUST, Cortese Medium Hydrocarbon contamination in soil. Case status unknown.

34 Bria Graphics Inc. CHMIRS, HAZNET, FINDS, RCRA-SQG

Medium Hydrocarbon release.

42 2010 El Segundo Blvd US Brownfields High Unknown. 43 Sierracin/Thermal Systems

LUST, Cortese High Unknown contamination of

soil. Case status unknown. 46 Northrop Corporation ERNS Medium Unknown release. 47 Northrop Corporation

Aircraft Division HMIRS, FINDS, HAZNET, RCRA-SQG, RCRA-TSDF

Medium Unknown release.

48 Plastiglide Manufacturing Corporation

CHMIRS, FTTS, HIST FTTS

Medium Unknown release.

49 Southbound I-110, 20 feet south of El Segundo Blvd

CHMIRS Medium Unknown release.


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51 Chester Washington Golf Course

LUST, Cortese Medium Hydrocarbon contamination in soil. Case status unknown.

Sources: EDR Radius Reports 01838506.1r and 01902285.1r. 1 Regulatory Agency Listing: see Table 2 for description of database.

2.4 APPLICABLE REGULATIONS, PLANS, AND STANDARDS There are several levels of regulation that may apply to waste materials generated during construction of the proposed project and Broadway alternative. Hazardous waste generated in the State of California is subject to regulation under federal regulations, as implemented in the State of California Environmental Protection Agency authorized program. In addition, the State of California has implemented an additional level of regulation for waste materials that are not subject to federal hazardous waste regulations.

The following are regulations that may apply to the waste generated during the pipeline construction:

• Code of Federal Regulations 40 (EPA) – RCRA-Hazardous waste, contaminated water

• Code of Federal Regulations 40 (TSCA) – PCB waste • Code of Federal Regulations 49 (DOT) – Hazardous waste transportation • National Emissions Standards for Hazardous Air Pollutants (NESHAP) –

Asbestos waste • Asbestos Hazard Emergency Response Act (AHERA) – Asbestos waste • California Health and Safety Code – RCRA-Hazardous waste and Non-RCRA

hazardous waste • California Water Code – contaminated water • California Code of Regulations Title 23 – contaminated water • California Code of Regulations Title 22 – RCRA-Hazardous waste and Non-

RCRA hazardous waste Hazardous substances are defined by state and federal regulations to protect public health and the environment. Hazardous materials have certain chemical, physical, or infectious properties that cause it to be considered hazardous. The California Code of Regulations (CCR), Title 22, Chapter 11, Article 2, Section 66261 provides the following definition:

A hazardous material is a substance or combination of substances which, because of its quantity, concentration, or physical, chemical or infectious characteristics, may either (1) cause, or significantly contribute to, an increase in mortality or an increase in serious irreversible, or incapacitating reversible illness; or (2) pose a substantial present or potential hazard to human health or environment when improperly treated, stored, transported, disposed of, or otherwise managed.


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According to Title 22 (Chapter 11 Article 3, CCR), substances having a characteristic of toxicity, ignitability, corrosivity, or reactivity are considered hazardous. Hazardous wastes are hazardous substances that no longer have a practical use, such as material that has been abandoned, discarded, spilled, contaminated, or is being stored prior to proper disposal.

Toxic substances may cause short-term or long-lasting health effects, ranging from temporary effects to permanent disability, or even death. For example, toxic substances can cause eye or skin irritation, disorientation, headache, nausea, allergic reactions, acute poisoning, chronic illness, or other adverse health effects if human exposure exceeds certain levels (the level depends on the substance involved). Carcinogens (substances known to cause cancer) are a special class of toxic substances. Examples of toxic substances include most heavy metals, pesticides, and benzene (a carcinogenic component of gasoline). Ignitable substances are hazardous because of their flammable properties. Gasoline, hexane, and natural gas are examples of ignitable substances. Corrosive substances are chemically active and can damage other materials or cause severe burns upon contact. Examples include strong acids and bases such as sulfuric (battery) acid or lye. Reactive substances may cause explosions or generate gases or fumes. Explosives, pressurized canisters, and pure sodium metal (which react violently with water) are examples of reactive materials.

Other types of hazardous materials include radioactive and biohazardous materials. Radioactive materials and wastes contain radioisotopes, which are atoms with unstable nuclei that emit ionizing radiation to increase their stability. Radioactive wastes mixed with chemical hazardous wastes are referred to as "mixed wastes." Biohazardous materials and wastes include anything derived from living organisms, such as untreated or partially treated sewage, sludge, or manure. They may be contaminated with disease-causing agents, such as bacteria or viruses.

Soil that is excavated from a site containing hazardous materials would be a hazardous waste if it exceeded specific CCR Title 22 criteria. Remediation (cleanup and safe removal/disposal) of hazardous wastes found at a site is required if excavation of these materials is performed; it may also be required if certain other activities are proposed. Even if soil or groundwater at a contaminated site does not have the characteristics required to be defined as hazardous wastes, remediation of the site may be required by regulatory agencies subject to jurisdictional authority. Cleanup requirements are determined on a case-by-case basis by the agency taking lead jurisdiction.

Naturally-occurring oil and natural gas seeps have been documented in most of the counties in the western half of California, including Los Angeles County (U.S.G.S. 2007). The nearest known natural seeps to the project alignment are located in the La Brea area, 8 miles north of the LAX terminus, and east of downtown Los Angeles, approximately 12 miles northeasterly from the 110 Freeway pipeline crossing. In addition, gas seeps have been recognized in many areas of the County where former and


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active oil producing fields are located. Abandoned oil wells may provide conduits for this type of seepage. The City of Los Angeles has designated a number of Methane Hazard Zones in the project vicinity. Within these zones, methane soil testing and mitigation of potential explosion hazard are required for building permits. The proposed pipeline alignment is almost entirely outside of the City of Los Angeles, but the two areas that are within the City (110 Freeway crossing and the northern terminus at LAX) are both within methane zones. Mitigation for areas where methane is detected by soil testing is focused on preventing accumulation of the gas in buildings or under paved areas. The only reference to buried utilities states that trench backfill should be impermeable, to preclude gas migration to structures (City of Los Angeles Building Code). Standard pipeline construction practices, including the use of slurry backfill and sealing the trench with new pavement, will ensure that the project will fully comply with this ordinance. Furthermore, due to the fact that the project will be constructed uniformly with respect to these standard pipeline construction practices, the project will be executed at the same level of compliance with respect to Methane Hazard Zones even within the jurisdiction of municipalities that do not contain specific methane ordinances.

2.5 HAZARDOUS WASTE REQUIREMENTS The federal Resource Conservation and Recovery Act of 1976 (RCRA) established a program administered by the United States Environmental Protection Agency (EPA) for the regulation of the generation, transportation, treatment, storage, and disposal of hazardous waste. RCRA was amended in 1984 by the Hazardous and Solid Waste Act (HSWA), which affirmed and extended the "cradle to grave" system of regulating hazardous wastes. The use of certain techniques for the disposal of some hazardous wastes was specifically prohibited by HSWA.

Individual states may implement hazardous waste programs under RCRA with EPA approval. California has not yet received this EPA approval; instead, the California Hazardous Waste Control Law (HWCL) is administered by the California Environmental Protection Agency to regulate hazardous wastes. While the HWCL is generally more stringent than RCRA, until the EPA approves the California program, both the state and federal laws apply in California.

The HWCL lists 791 chemicals and about 300 common materials, including jet fuel, that may be hazardous; establishes criteria for identifying, packaging, and labeling hazardous wastes; prescribes management controls; establishes permit requirements for treatment, storage, disposal, and transportation; and identifies some wastes that cannot be disposed of in landfills. Jet fuel is not specifically listed as an EPA RCRA hazardous waste according to federal regulations (40 CFR 260-271).

2.6 HAZARDOUS MATERIAL WORKER SAFETY


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The California Occupational Safety and Health Administration (Cal/OSHA) is the primary agency responsible for worker safety in the handling and use of chemicals in the workplace. Cal/OSHA standards are generally more stringent than federal regulations. The employer is required to monitor worker exposure to listed hazardous substances and notify workers of exposure (8 CCR Sections 337-340). The regulations specify requirements for employee training, availability of safety equipment, accident-prevention programs, and hazardous substance exposure warnings.

3.0 EXPOSURE PATHWAYS AND MITIGATION MEASURES

The principal exposure pathways related to this project involve the excavation and handling of contaminated soil resulting in exposure of workers and the general public (for example, workers coming into contact with contaminated soil through excavation, stockpiling and or/handling, disturbed contaminants volatilizing and becoming airborne, wind-blown soil and dust, contaminated soil and water in washwater or stormwater runoff, or traffic [foot, vehicular, or trespassing] on- and off-site). A wide variety of contaminants, including petroleum hydrocarbons, solvents, polynuclear aromatic compounds (also called polycyclic aromatic hydrocarbons), heavy metals, and herbicides may be present along the pipeline route. Contaminant types, concentrations, and location cannot be accurately predicted without site specific information. Hazardous materials in the construction area may require special handling as hazardous waste, and create an exposure risk to workers and the general public during excavation and transport. Contaminated soil exceeding regulatory limits for trench backfilling will require transportation to off-site processing facilities; contaminated soil removed from the construction area must be transported according to state and federal regulations and be replaced by import soil approved for backfilling.

Vehicles and equipment used for construction could contain or require the temporary, short-term use of potentially hazardous substances, such as fuels, lubricating oils, and hydraulic fluid. The potential exists for an accidental release of hazardous materials during construction and refueling activities. The release of these materials has the potential to impact construction workers, the public, and the environment if they are not properly contained and removed. Potential impacts from the release of these materials would be mitigated by the implementation of construction best management practices (BMPs) that would be outlined within a spill prevention, control, and countermeasures (SPCC) plan. The SPCC would have to be completed prior to the beginning of construction. These BMPs could include, but would not be limited to, construction practices such as the use of absorbent pads for spill containment, specified locations for construction vehicle refueling, and a daily vehicle inspection schedule designed to identify leaking fuels and/or oils as early as possible.

Sites that are physically separated from the pipeline route would have little or no potential to impact the project. The remaining adjacent sites are ranked as high or medium potential to impact pipeline construction according to a site’s regulatory status.


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3.1 SIGNIFICANCE CRITERIA Impacts of construction would be considered significant if:

• Pipeline construction causes soil contamination, including flammable or toxic gases, at levels exceeding federal, state, and local hazardous waste limits established by 40 CFR Part 261 and Title 22 CCR 66261.21, 66261.22, 66261.23 and 66261.24.

• Construction activities would result in mobilizing contaminants, creating potential

pathways of exposure to humans and/or other sensitive receptors. The presence of contaminated soils within the proposed and alternative pipeline routes would be considered significant if:

• Workers and/or the public would be exposed to contaminated or hazardous materials during pipeline construction activities and such exposure exceeds permissible exposure levels set by the Cal/OSHA in CCR Title B and the Federal Occupational Safety and Health Administration (OSHA) in Title 29 CFR Part 1910.

Based on these criteria, the screened database was reviewed to identify sites with potential to contaminate the construction area. Sites are ranked according to high and medium potential to significantly impact construction by causing hazardous waste in the pipeline route. Low potential sites were not included. Transport of excavated contaminated soil from the pipeline route from high and medium potential sites, and temporary on-site storage of contaminated soil could generate exposure pathways to workers and the general public.

Active hazardous waste sites physically separated from the pipeline route by roads or other facilities would have a low potential to cause hazardous substances along the pipeline route. These physical barriers provide a buffer that would restrict surface migration of contaminants from the source and inhibit unauthorized waste disposal along the pipeline route. Subsurface migration of contaminants within the unsaturated soil zone is predominantly vertical downward and is not likely to reach the pipeline route from buffered sites.

Subsurface migration of mobile contaminants within groundwater may provide a conduit to the project area. However, the water table is expected to be below the planned excavation depth throughout most of the proposed and alternative routes, and contaminated groundwater below the excavation is not expected to impact construction.

3.2 PROPOSED SAFETY MEASURES The following measures are proposed to reduce impacts related to environmental contamination, and are intended to alleviate risks to the exposed population by


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developing appropriate safeguards and operating procedures prior to construction. Upon completion of pipeline design, these measures will be implemented by WesPac and its construction contractor, and the results will be summarized in project-specific safety plans that address appropriate worker protection; and project-specific waste management plans that discuss proper sampling, handling, storage, transport, treatment, and disposal of hazardous waste generated from construction. This report outlines general procedures for handling and disposing of hazardous substances. All referenced safety or contingency plans, as well as site-specific directed physical testing and record reviews, are not required until the project designs and route parameters are finalized. This is the case because existing hazardous materials sites or contamination within the ROW represent obstacles to the construction of the project, not factors which might change the project itself. For example, a site within the pipeline ROW that contains contaminated soil will add procedures to the construction process, but it will not force the project down a different physical path.

The measures outlined below require that technical studies and field verification be performed prior to construction. This work may include: regulatory agency records review, development and implementation of sampling plans and soil vapor surveys, and preparation of contingency plans. This work must be performed by qualified environmental professionals. 1. If construction or trench parameters (trench location and/or depth) are changed, the database records and site rankings should be reviewed and re-evaluated. 2. Samples will be collected during construction and analyzed by EPA SW-846 analytical test methods to determine the concentration of any contamination. A contingency plan will identify specific measures, precautions, and alternatives for action to be taken when contaminated soils or vapors are encountered in the pipeline route. The plan could include, but would not be limited to, procedures for monitoring, identifying, handling, and disposing of hazardous materials/waste. The plan will be in conformance with the project specific health and safety plan, reviewed and signed by a certified industrial hygienist (CIH), specifying site monitoring guidelines and action levels, as well as PPE. 3. If contamination is confirmed, the contingency plan will identify the regulatory agencies to notify, the appropriate environmental permits that may be required, the names of qualified hazardous waste haulers, and the locations of appropriate treatment/disposal facilities. Some additional items to be included in the plan would be:

• A listing of known contaminants and contaminant levels, or sampling procedures to confirm contaminants and levels;

• Agency notification requirements; • Monitoring requirements; • Agency participation requirements; • Public notification requirements; and


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• PPE and Health and Safety (H&S) requirements, including requirements related to storage and handling, potential for use as backfill, and limiting exposure to the general public.

Areas with contaminated soil determined to be hazardous will be excavated by personnel who have been trained through the OSHA recommended, 40-hour safety program (29 CFR 1910.120) with an approved plan for excavation, control of contaminant releases to the air, and off-site transport. H&S plans, reviewed and signed by a CIH, will be developed to protect the general public and workers in the construction area. If the agency record review indicates the potential for toxic or explosive gases (i.e. benzene, vinyl chloride, and methane) emanating from the landfills or transfer stations, a qualified environmental professional will conduct a soil vapor survey along the proposed project pipeline route immediately adjacent to the landfills/transfer stations. Where potentially hazardous levels of gas are identified, mitigation by aeration and gas monitoring should be performed during construction.

4. Trained personnel should be assigned during active trenching to observe visual evidence of contamination (staining) and/or odorous conditions. Monitoring with appropriate testing equipment (for example, photo-ionization or flame ionization detectors) should be performed, and sampling and laboratory testing should be conducted as necessary to identify areas of previously unknown soil and/or vapor contamination within the excavation. Trained personnel should meet the federal OSHA requirement for 40-hour Training for Hazardous Waste Operations and Emergency Response (29 CFR 1910.120), and be familiar with the calibration and operation of the testing equipment.

The monitoring personnel will have the authority to implement an approved site-specific contingency plan when hazardous materials are encountered. Contingency plans, developed prior to construction, would identify specific measures, precautions and alternatives for action to be taken if/when contaminated soils or vapors are encountered in the pipeline routes. The plan would specify procedures for monitoring, identifying, handling, and disposing of hazardous materials/waste, including contamination from unanticipated sources within the excavated trench.

3.3 WORKER/PUBLIC SAFETY IMPACTS AND EXPOSURE MITIGATION: PROPOSED MEASURES Table 3 lists 19 sites with high potential, and 32 sites with medium potential, to impact the proposed route.

The presence of hazardous waste sites along the pipeline route represents a potentially significant impact due to the potential health hazards to construction workers and the public. The following measures are necessary to provide an assessment of actual or potential site contamination, resulting in the development of appropriate safeguards and methods to reduce potential risk prior to construction. The measures outlined below must


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be accomplished during construction to allow development of appropriate worker protection and waste management plans that discuss proper handling, treatment, and storage of hazardous waste from the project (prior to construction).

These measures present procedures for further evaluating sites with low, moderate, and high impact potential. While the existence of hazardous sites along the project corridor, or at stations, could result in a potentially significant exposure, the application of the following mitigation measures reduces that exposure to a level that is not significant because excavation, handling, and treating of contaminated soil will be accomplished under pre-approved plans designed to protect the workers, public and the environment.

The proposed mitigation measures outlined herein should begin to be initialized as soon as project designs and route parameters are finalized, and should be carried out prior to and during construction as necessary. These measures are either dependant upon potential future change in specific project design features or are appropriately completed after the project designs and route parameters are finalized, due to the fact that potential existing environmental contamination is not a factor in the determination of route parameters. That is to say, potential existing contamination within the pipeline ROW is an issue to be addressed solely by proper construction procedures and will not affect change upon the project designs and route parameters.

Exposure Pathway

Construction through areas with identified contaminated sites could affect workers or nearby public.

Exposure Mitigation (EM-1) Low potential sites should be re-evaluated if construction parameters vary in the following ways: trench depth exceeds planned depth of 3.5 to 6 feet or will potentially encounter contaminated groundwater, the location of the trench is re-located out of the public right-of-way (where trenching could occur in a low potential site), or if the routes change. If these conditions are met, all low potential sites should be re-evaluated to determine whether they need to be reclassified as medium or high impact potential sites.

EM-2 Thoroughly review current agency records of the pipeline route for medium potential sites (as labeled in Table 3). Record review should identify data confirming existence and extent of contamination, adequate remediation of the pipeline route, or agency-certified closure of the site. In these locations, investigations of the shallow subsurface (with the aid of a spade or probe) should verify no evidence of discharge, surface stains, or unauthorized dumping. Results of the record review or visual inspection that indicate contamination is present in the pipeline route should cause medium potential sites to be treated as high potential.


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Record review of medium potential sites must determine that the horizontal limits of soil contamination do not extend near the proposed trench area. Where the limits of contamination are uncertain, a soil vapor survey or soil sampling should be conducted along the affected length of the proposed trench. Laboratory test results from these site investigations should be reported to the lead agency (such as the DTSC, the Los Angeles County Environmental Protection Division, the RWQCB Region 4, or the local CUPA), and include an assessment of the contamination potential in the trench area. The proposed route passes directly west of the Ascon Landfill and the Alameda Street Sanitary Landfill, and south of the American Waste Systems and Coastal Material Recovery transfer stations. In order to verify if contamination from any landfill/transfer station is present within the pipeline ROW, a soil vapor survey consisting of driving probes every 25 to 50 feet along the affected trench line should be conducted at the start of construction. Vapor samples should be tested for methane, other flammable gases, and volatile organic compounds. Laboratory test results should be reported to the lead agency and include an assessment of the contamination potential in the trench area.

EM-3 Review current agency records of high potential sites (as labeled in Table 3) to design an investigation program to assess surface waste or debris and underlying soil. The investigation program should be reviewed and approved by the lead agency (such as the DTSC, the Los Angeles County Environmental Protection Division, the RWQCB Region 4, or the local CUPA) prior to commencement. If records review demonstrates that contamination from high sites does not currently exist, or if remediation has been completed, and/or the agency has issued a case closed status, the site may be downgraded to a low potential site. If the records review does not eliminate the possibility that contamination could exist, a site investigation should be performed prior to the start of construction at the site. The investigation should include collecting samples for laboratory analysis and quantification of contaminant levels within the proposed excavation and surface disturbance areas. Subsurface investigation for high potential sites should determine appropriate worker protection and hazardous material handling and disposal procedures appropriate for the subject site. Areas with contaminated soil determined to be hazardous waste should be excavated by personnel who have been trained through the OSHA recommended 40-hour safety program (29CFR1910.120) with an approved plan for excavation, control of contaminant releases to the air, and off-site transport or on-site treatment. H&S plans, prepared by a qualified and approved CIH, should be developed to protect the general public and all workers in the construction area.

Exposure Pathway Construction through contaminated soils at station tie-ins, as with pipeline construction, could affect workers and/or nearby members of the public (for example, workers coming into contact with contaminated soil through excavation, stockpiling and/or handling;


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disturbed contaminants volatilizing and becoming airborne; wind-blown soil and dust; contaminated soil and water in washwater or stormwater runoff; or traffic [foot, vehicular, or trespassing] on- and off-site).

EM-4 The LAXFUELS terminal is ranked as having medium potential to impact the project due to contamination of soil and groundwater by hydrocarbons including jet fuels. Remediation is currently underway (EDR January 2007, Page 2-16). A subsurface investigation combining soil vapor and soil sampling should be undertaken at the site and in any other areas where ground disturbance would result from modifications at this station. Sampling probes should be driven at intervals of 25 feet (horizontal spacing) to collect soil and vapor samples throughout the trench depth. Samples should be tested for all ranges of petroleum hydrocarbons, MTBE, 1, 2-DCA and other volatile organic compounds. Vapor testing at mid-trench and full-trench depth is required to adequately determine the presence of vapor within the trench, which would be used to assess potential exposure to workers and the public. Laboratory test results should be reported to the lead agency (such as the DTSC, the Los Angeles County Environmental Protection Division, the RWQCB Region 4, or the local CUPA) and include an assessment of the contamination potential in the trench area.

EM-5 Contaminated site agency records searches for the Kinder Morgan and Vopak tie-in locations or pumping stations should be performed and the sites accordingly ranked as having high, medium, or low potential for impact. If the site has high or medium potential, the exposure limitations described in EM-4 above should be followed.

Exposure Pathway Construction workers or nearby members of the public could be affected by encountering/uncovering unanticipated contaminated soils or facilities in the route.

EM-6 Assign trained personnel during active trenching to observe visual evidence of contamination and perform monitoring with appropriate testing equipment (for example, photoionization or flame ionization detectors), sampling, and direct laboratory testing (including on-site testing) as necessary to identify areas of previously unknown soil contamination within the excavation. These personnel should meet the federal OSHA requirement for 40-Hour Training for Hazardous Waste Operations and Emergency Response (29CFR1910.120) and be familiar with the calibration and operation of the testing equipment. The monitoring personnel should have authority to implement approved site specific contingency plans when unanticipated hazardous materials are encountered. Site specific plans should be approved by the lead agency’s designated on-site representative prior to


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construction, and should present specific alternatives for action to be taken in the event contaminated soils are encountered. The plan should specify procedures for monitoring, identifying, handling, and disposing of hazardous waste, including contamination from unanticipated tanks or pipelines within the excavation. The contingency plan should be in conformance with the H&S plan prepared by a CIH for the project.

EM-7 During pipeline design, the California Department of Conservation, Division of Oil, Gas and Geothermal Resources should be contacted for specific information on wells located in or near the pipeline route, including location and abandonment details. Construction over abandoned oil wells will be avoided to the extent possible. If the pipeline is located over or near (i.e. within 50 feet) a plugged or abandoned well, or if an unrecorded well is encountered during construction, coordination will be performed with the Division of Oil, Gas and Geothermal Resources to ensure that the well is flagged for avoidance.

EM-8 The possibility of methane seepage into the open pipeline trench during construction could pose a hazard to workers in the trench and to others in the construction area. Mitigation of potential methane accumulation in the construction trench in areas where methane may be present would involve testing of the atmosphere in the trench before, and periodically while, workers are allowed in the trench. Areas where this testing may be necessary are primarily portions of the alignment within former oil and gas producing areas. However, testing for methane would be conducted along the entire pipeline route to ensure that any potential impacts from unknown and/or unmapped seeps of methane are properly mitigated. Testing for methane requires the use of an instrument that can measure the concentration of methane and other explosive gasses as a percentage of their lower explosive limit (LEL). If explosive gas is detected above a set percentage of LEL (25 percent is the limit set by Cal/OSHA), workers would be required to evacuate the trench until the explosive gas is reduced to a level below the set limit by means such as increased ventilation.

Cumulative or Long-Term Exposure Pathways Clean up and disposal of contaminated soil can be a beneficial result of construction of the proposed project or the Broadway alternative. As illustrated in Table 3, there are 51 sites with known soil contamination near the proposed route that have been rated as having either a medium or high potential to impact the proposed project or Broadway alternative. Many of these sites are undergoing continued investigation or remediation.

The following are potential options for disposal of waste associated with the construction of the project: • Recycling

o Thermal Desorbtion – Non-hazardous petroleum contaminated soil


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o Landfill Daily Cover – Non-hazardous petroleum contaminated soil • Treatment

o Dechlorination – RCRA-Hazardous soil contaminated with chlorinated solvents

o Incineration – RCRA-Hazardous soil contaminated with chlorinated solvents o Water treatment

POTW Discharge – Hazardous and Non-Hazardous water treated to meet sewer discharge requirements.

NPDES Discharge – Non-hazardous water treated to meet storm drain discharge requirements.

• Landfill o Municipal (Class I) – Non-hazardous debris and non-hazardous petroleum

contaminated soil (Asbestos waste in permitted landfill cells) o Petroleum (Class II) – Non-hazardous petroleum contaminated soil not

suitable for Class I landfill o Hazardous waste (Class I) – RCRA- Hazardous waste and Non-RCRA

hazardous waste

4.0 REFERENCES CAL/OSHA POCKET GUIDE FOR THE CONSTRUCTION INDUSTRY available online at http://www.dlse.ca.gov/dosh/dosh_publications/const_guide.pdf City of Los Angeles, Department of Building and Safety, Methane Code; http://www.ladbs.org/rpt_code_pub/Methane_Code.pdf. Accessed 5/15/2007.

Environmental Data Resources (EDR). Radius Map for Inquiry Number 01838506.1r. January 24, 2007.

Environmental Data Resources (EDR). Radius Map for Inquiry Number 01902285.1r. April 24, 2007.

U.S. Geological Survey (U.S.G.S.), Oil and Gas Seeps in California, Index map of California and detail at 1 in. = 15 mi., http://seeps.wr.usgs.gov/ca_seeps.html. Accessed 5/15/2007.


APPENDIX A HAZARDOUS SITES MAP

hazardous materials report wespac lax pipeline, llceng2.lacity.org/techdocs/emg/docs/deir_a/appendix...

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