PHASE I ENVIRONMENTAL SITE ASSESSMENT HUNTINGTON

Download PHASE I ENVIRONMENTAL SITE ASSESSMENT HUNTINGTON

Post on 13-Feb-2017

215 views

Category:

Documents

2 download

Embed Size (px)

TRANSCRIPT

  • PHASE I ENVIRONMENTAL SITE ASSESSMENT

    HUNTINGTON BEACH WETLANDS ORANGE COUNTY, CALIFORNIA

    Prepared for:

    Moffatt & Nichol 250 W. Wardlow Road

    Long Beach, California 90807

    Huntington Beach

    Wetlands Conservancy P.O. Box 5903

    Huntington Beach, California 92615

    Prepared by:

    GeoSyntec Consultants

    2100 Main Street, Suite 150 Huntington Beach, California 92648

    (714) 969-0800 www.geosyntec.com

    25 August 2004

  • GeoSyntec Consultants

    HG0858\Phase I\HBW04-01-Toc.doc i 04 08 24/11:51

    TABLE OF CONTENTS

    Page 1. INTRODUCTION ................................................................................................ 1

    1.1 Terms of Reference................................................................................... 1 1.2 Scope of Work .......................................................................................... 1 1.3 Report Organization ................................................................................. 2

    2. SITE DESCRIPTION........................................................................................... 4

    2.1 Site Location............................................................................................. 4 2.2 Site Characteristics ................................................................................... 4 2.3 Surrounding Land Uses ............................................................................ 5

    3. GEOLOGY AND HYDROGEOLOGY............................................................... 6 4. SITE HISTORY.................................................................................................... 8 5. RECORDS REVIEW ........................................................................................... 9

    5.1 General...................................................................................................... 9 5.2 Database Search Report............................................................................ 9 5.3 Historical Records .................................................................................. 12 5.4 Agency File Reviews.............................................................................. 14 5.3 City of Huntington Beach Fire Department Records Review ................ 15

    6. SUMMARY OF SITE RECONNAISSANCE ................................................... 16

    6.1 General.................................................................................................... 16 6.2 Use of Hazardous Substances................................................................. 16 6.3 Hazardous Substance Containers............................................................ 16 6.4 Storage Tanks ......................................................................................... 17 6.5 Polychlorinated Biphenyls (PCBs) ......................................................... 17 6.6 Pesticides ................................................................................................ 17 6.7 Solid Waste............................................................................................. 17 6.8 Drainages ................................................................................................ 18 6.9 Wetlands ................................................................................................. 18

  • GeoSyntec Consultants

    TABLE OF CONTENTS (continued)

    Page

    HG0858\Phase I\HBW04-01-Toc.doc ii 04 08 24/11:51

    6.10 Wells ....................................................................................................... 19 6.11 Lead and Asbestos-Containing Materials............................................... 19 6.12 Radon...................................................................................................... 19 6.13 Observation of Off-Site Properties ......................................................... 19 6.14 Septic Tanks............................................................................................ 20

    7. SUMMARY OF FINDINGS.............................................................................. 21 8. CONCLUSIONS AND RECOMMENDATIONS ............................................. 22 9. SIGNATURE...................................................................................................... 23 REFERENCES ............................................................................................................... 24 TABLES

    5-1 Evaluation of Facilities Identified in Database Search

    FIGURES 2-1 Site Location 2-2 Site Plan 6-1 Identified Site Features APPENDICES

    A Select Aerial Photographs B California Division of Oil, Gas, and Geothermal Resources West Newport

    Oil Field C EDR Database Search Report D Site Photographs

  • GeoSyntec Consultants

    HG0858-01/HBW04-01.RPT.DOC 1 04 08 24/11:43

    1. INTRODUCTION

    1.1 Terms of Reference This report documents the Phase I Environmental Site Assessment (ESA)

    performed by GeoSyntec Consultants (GeoSyntec) for the proposed Huntington Beach Wetlands restoration property located in the City of Huntington Beach, County of Orange, California (the Site). The ESA was performed by GeoSyntec for the sole use of its clients, the Huntington Beach Wetlands Conservancy (HBWC) and Moffat & Nichol, for the purposes of establishing an approximate assessment of environmental conditions at the Site. This report was prepared Ms. Lauren Dage and Mr. Michael Reardon, P.E. and has been reviewed by Dr. Bertrand Palmer, P.E., all of GeoSyntec.

    1.2 Scope of Work This ESA was prepared in accordance with the scope of work described in

    Task 6 of Moffat & Nichols proposal. This proposal incorporated by reference the ASTM Standard E 1527-00, Standard Practice for Environmental Assessments: Phase I Environmental Site Assessment Process. Specifically, the scope of work for this ESA included the following:

    Records and Database search; Regulatory Agency and City of Huntington Beach Fire Department file

    reviews; Aerial photograph reviews; and Site reconnaissance. A previous Phase I ESA was performed for a portion of the Site in 2003

    [Miller Brooks, 2003]. As relevant, findings and related information from the previous Phase I have been incorporated in this report by reference.

    This ESA is not, nor should it be construed as, a regulatory compliance

    audit. The conclusions contained in this ESA are based solely upon analysis of the

  • GeoSyntec Consultants

    HG0858-01/HBW04-01.RPT.DOC 2 04 08 24/11:43

    conditions as observed by GeoSyntec personnel and as reported by regulatory agencies and other named sources at the time at which the ESA was performed.

    If actual conditions are found to differ from those described in this report, or

    if new information regarding the Site is obtained, GeoSyntec should be notified and additional recommendations, if required, will be provided. GeoSyntec is not liable for any use of the information contained in this report by persons other than the HBWC or Moffat & Nichol. GeoSyntec is not liable for the use of information in this report for any purposes other than referenced in this report without the expressed, written consent of GeoSyntec.

    1.3 Report Organization The remainder of this report is organized into the following sections; Section 2, Site Description, provides details of the Site location,

    characteristics, and surrounding land use, Section 3, Geology and Hydrogeology, provides background

    information on the regional geology and hydrology, Section 4, Site History presents a brief history of Site and

    surrounding property development and use, Section 5, Records Review presents the results of environmental

    database searches, regulatory agency files reviews and a review of historical aerial photographs,

    Section 6, Summary of Site Reconnaissance, presents a summary

    of Site conditions observed during a Site inspection, Section 7, Summary of Findings, presents a summary of the

    findings of the Phase I ESA for the Site,

  • GeoSyntec Consultants

    HG0858-01/HBW04-01.RPT.DOC 3 04 08 24/11:43

    Section 8, Conclusions and Recommendations, presents conclusions and recommendations based upon the findings of the Phase I ESA for the Site, and

    Section 9, Signature, presents a signature page for the Phase I

    ESA.

  • GeoSyntec Consultants

    HG0858-01/HBW04-01.RPT.DOC 4 04 08 24/11:43

    2. SITE DESCRIPTION

    2.1 Site Location The Site is an irregular shaped parcel located along Pacific Coast Highway

    in the City of Huntington Beach, County of Orange, California (Figure 2-1). The Site is bounded to the north by the Huntington Beach Channel and residential, commercial, and industrial properties, to the east by the levee for the Santa Ana River, and to the west by Beach Boulevard (Figure 2-2).

    2.2 Site Characteristics The Site encompasses approximately 180 acres of restored and degraded

    saltmarsh, seasonal wetlands and coastal dune habitat. As shown on Figure 2-2, the Site includes four sections, the Talbert Inlet/Outlet and Talbert Marsh, the Brookhurst Marsh, the Magnolia Marsh and the Newland Marsh. Each of these marsh areas are hydraulically connected via the Huntington Beach Channel constructed partially with sheet pile. The Talbert Channel joins the Huntington Beach Channel at the northeastern corner of the Site.

    The Site is located within the USGS Newport Beach Quadrangle map dated

    1952, photo revised 1967. The Site is relatively flat, with elevations ranging from approximately 5 feet above mean sea level to less than mean sea level [USGS, 1965].

    The Site currently exists as undeveloped open space consisting of sand

    dunes along Pacific Coast Highway, wetland areas and salt flats. The wetland areas are typical of an online inter-tidal salt marsh. A majority of the Site does not currently receive tidal exchange. The wetland characteristics are maintained through fluctuations of shallow groundwater, communication through the flood control channel levees, direct precipitation and urban runoff [Miller Brooks, 2003].

  • GeoSyntec Consultants

    HG0858-01/HBW04-01.RPT.DOC 5 04 08 24/11:43

    2.3 Surrounding Land Uses Although the Site is undeveloped, the surrounding land uses include a mix of

    residential, commercial, and industrial uses (Figure 2-2). Surrounding land uses and key features include the following:

    To the north of the Site exists residential, commercial and industrial

    land uses including the Ascon landfill, above ground storage tanks, the Orange County sewage treatment plant, and light commercial and industrial property;

    To the east of the Site exists the levee to the Santa Ana River;

    To the south, the Site is bordered by Pacific Coast Highway and the

    Huntington Beach State Park, above ground fuel storage tanks and the AES generating station; and

    To the west of Beach Boulevard exists the Hyatt Hotel and a nearly

    constructed residential housing development.

  • GeoSyntec Consultants

    HG0858-01/HBW04-01.RPT.DOC 6 04 08 24/11:43

    3. GEOLOGY AND HYDROGEOLOGY The Site is located in the southwest portion of the Coastal Plain of Orange

    County, which is bordered by the Santa Ana Mountains on the east, the San Joaquin Hills to the south, and the Pacific Ocean to the west. A line of low hills (or mesas) and intervening valleys (or gaps) associated with the Newport-Inglewood structural zone are present across the Coastal Plain of Los Angeles and Orange Counties. This structural zone forms the hills, with the inland synclinal trough consisting of thick sequences of permeable and impermeable sediments that form the Orange County Ground Water Basin in this area.

    The Site is located within the physiographic feature known as the Talbert or

    Santa Ana Gap. The Santa Ana Gap was formed during the Pleistocene Glaciation Age sea-level retreat when the ancestral Santa Ana River eroded the uplifted mesas. At the end of the ice age, the sea level rose and the gap was filled with approximately 170 ft of mixed alluvial and coastal sediments. These Holocene-age sediments include two units: (1) an upper unit approximately 70 ft thick that consists of clay and silt with interbedded sands and peat beds; and (2) a lower unit approximately 100 ft thick that consists of sand and gravel. This 170-ft thick section is believed to be present beneath the Site [GeoSyntec, 2004]. The Site is also within the northwest-trending Newport-Inglewood Fault Zone, immediately north of the South Branch. Movement along the fault zone has resulted in complex stratigraphy in Pleistocene or older-age sediments [CDWR, 1967].

    The first water bearing unit in the vicinity of the Site is identified as the

    Semi-Perched Aquifer (SPA). The SPA consists of clay and silt with interbedded sand and peat beds and is estimated to be approximately 50 feet thick [GeoSyntec, 2004]. The elevations of the groundwater in the SPA are estimated to range from several feet below mean sea level (MSL) to MSL (North American Vertical Datum 88). Shallow groundwater elevations are influenced by ocean tidal fluctuation. The bordering channels, the Huntington Beach Channel and the Talbert Channel are tidally influenced in portions adjacent to the Site.

    The Talbert Aquifer is located immediately beneath the SPA to a depth of

    approximately 180 feet bgs [GeoSyntec, 2004]. The Talbert Aquifer in the vicinity of

  • GeoSyntec Consultants

    HG0858-01/HBW04-01.RPT.DOC 7 04 08 24/11:43

    the Site is an inter-fingered sequence of sandy water-bearing zones separated by clay layers. Toward the ocean, the boundary between the SPA and Talbert Aquifer appears to become less distinct and the two units merge on the southwest side of Pacific Coast Highway. The SPA/Talbert Aquifer(s) are in direct contact with seawater beneath the ocean [GeoSyntec, 2003].

    Shallow groundwater in the vicinity of the Site has been found to be degraded as a result of seawater intrusion. Sampling data from the adjacent Ascon Landfill located just to the north of the Site indicate total dissolved solids (TDS) concentrations ranging from 5,100 milligrams per liter (mg/L) to 23,000 mg/L. The average concentration was approximately 14,000 mg/L. These concentrations are indicative of seawater intrusion, where TDS concentration in seawater averages approximately 33,000 mg/L [GeoSyntec, 2003]. It is likely that total dissolved solids concentrations increase at closer distances to the Pacific Ocean.

  • GeoSyntec Consultants

    HG0858-01/HBW04-01.RPT.DOC 8 04 08 24/11:43

    4. SITE HISTORY The Site history described herein is based on a review of historical aerial

    photographs and Site documents. Select aerial photographs were provided by Environmental Data Resources, Inc. (EDR) and are included in Appendix A.

    In the early 1900s, much of the area was used for duck hunting until oil and

    gas wells were developed on the site in the beginning of the 1920s. A total of 23 oil and gas production wells were drilled on the subject property. Acc...

Recommended

View more >