Phase I Environmental Site Assessment HCFCD Project ID B509-04-00-E001

Red Bluff Regional Detention Basin (C-07)

West Fairmont Parkway & Genoa Red Bluff Road

La Porte, Harris County, Texas

September 10, 2021

Terracon Project No. 92207764.T4

Prepared for:

iGet Services LLC

Houston, Texas

Prepared by:

Terracon Consultants, Inc.

Houston, Texas

Terracon Consultants Inc. 11555 Clay Rd, Ste 100 Houston, TX 77043-1239

P 713-690-8989 F 713-690-8787 terracon.com

September 10, 2021 iGet Services LLC

10039 Bissonnet Street, Suite 336

Houston, Texas 77036

Attn: Dr. Satya Pilla

P: (832) 858-3982

E: drsatyapilla@igetservices.com

Re: Phase I Environmental Site Assessment

Red Bluff Regional Detention Basin (C-07)

West Fairmont Parkway & Genoa Red Bluff Road

La Porte, Harris County, Texas

Terracon Project No. 92207764.T4

Dear Dr. Pilla:

Terracon Consultants, Inc. (Terracon) is pleased to submit the enclosed Phase I Environmental

Site Assessment (ESA) report for the above-referenced site. This assessment was performed in accordance with Terracon Proposal No. P92207764 dated July 28, 2021.

We appreciate the opportunity to be of service to you on this project. In addition to Phase I services, our professionals provide geotechnical, environmental, construction materials, and facilities services on a wide variety of projects locally, regionally and nationally. For more detailed information on all of Terracon’s services please visit our website at www.terracon.com.

If there are any questions regarding this report or if we may be of further assistance, please do not hesitate to contact us.

Sincerely, Terracon Consultants, Inc.

Christina Rosilez Edward W. James

ESA Group Manager Principal

Attachments mailto:drsatyapilla@igetservices.com http://www.terracon.com/

TABLE OF CONTENTS

Page No.

EXECUTIVE SUMMARY ............................................................................................................................... i Findings and Opinions ...................................................................................................................... i Significant Data Gaps ...................................................................................................................... iv Conclusions ...................................................................................................................................... iv Recommendations ........................................................................................................................... iv

1.0 INTRODUCTION

1.1 Site Description

1.2 Scope of Services

1.3 Standard of Care

1.4 Additional Scope Limitations, ASTM Deviations and Data Gaps

1.5 Reliance

1.6 Client Provided Information

2.0 PHYSICAL SETTING

3.0 HISTORICAL USE INFORMATION

3.1 Historical Topographic Maps, Aerial Photographs, Sanborn Maps

3.2 Historical City Directories

3.3 Site Ownership

3.4 Title Search

3.5 Environmental Liens and Activity and Use Limitations

3.6 Interviews Regarding Current and Historical Site Uses

3.7 Prior Report Review

4.0 RECORDS REVIEW

4.1 Federal and State/Tribal Databases

4.2 Local Agency Inquiries

4.3 Local Area Knowledge

5.0 SITE RECONNAISSANCE

5.1 General Site Information

5.2 Overview of Current Site Occupants

5.3 Overview of Current Site Operations

5.4 Site Observations

6.0 ADJOINING PROPERTY RECONNAISSANCE

7.0 ADDITIONAL SERVICES

8.0 DECLARATION

TABLE OF CONTENTS (continued)

APPENDICES

APPENDIX A Exhibit 1 - Topographic Map, Exhibit 2 - Site Diagram

APPENDIX B Site Photographs

APPENDIX C Historical Documentation and User Questionnaire

APPENDIX D Environmental Database Information

APPENDIX E Credentials

APPENDIX F Description of Terms and Acronyms

Red Bluff Regional Detention Basin (C-07) ■ La Porte, TX September 10, 2021 ■ Terracon Project No. 92207764

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EXECUTIVE SUMMARY

This Phase I Environmental Site Assessment (ESA) was performed in accordance with

Terracon Proposal No. P92207764 dated July 28, 2021, and was conducted consistent with the procedures included in ASTM E1527-13, Standard Practice for Environmental Site

Assessments: Phase I Environmental Site Assessment Process. The ESA was conducted under the supervision or responsible charge of Christina Rosilez, Environmental Professional, who performed the site reconnaissance on August 30, 2021.

Findings and Opinions

A summary of findings is provided below. It should be recognized that details were not included or fully developed in this section, and the report must be read in its entirety for a comprehensive understanding of the items contained herein.

Site Description and Use

As understood by Terracon, the project (site) consists of two adjacent proposed detention basins (B509-04-00 and B509-03-00) located in the southwest and southeast corners of the intersection of West Fairmont Parkway and Genoa Red Bluff Road, in La Porte, Harris County, Texas. The site consists of approximately 326 acres of undeveloped, wooded land, and includes the corresponding segment of the HCFCD channel to the east (Spring Gully – B109-00-00). The proposed detention basins are bisected by Genoa Red Bluff Road and an overhead electrical power line easement.

Historical Information

Based on a review of the historical information, the site primarily consisted of undeveloped land with residential development from at least 1916 until the early 1970s when residential structures were no longer apparent. The site has been undeveloped land since that time. In the early

1940s, oil/gas exploration activity was apparent on the southeast portion of the site and pipeline easements have transected the northwestern and northern portions of the site since the early

1950s and mid-1990s, respectively. On-site oil/gas exploration activity is further discussed below under records review.

Adjoining property north consisted of a road followed by undeveloped land from at least 1916 until a pipeline easement was evident in the early 1950s followed by residential development which began north of West Fairmont Parkway in the early 2000s. Commercial development was evident north of West Fairmont Parkway in the late 2010s. Adjoining property east was undeveloped land from at least 1916 until commercial development began in the early 2000s.

Adjacent property south consisted of undeveloped land from at least 1916 until oil/gas exploration and production (E&P) activity was evident (further south of the site) from the early

1940s through the early 1970s. Current commercial development was visible by the late 1970s.

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Adjoining property west was undeveloped land from at least 1916 until a pipeline easement was evident in the early 1940s and a powerline easement was visibly by the mid-1950s. The current substation was visible by the late 1970s and commercial development began in the early 2000s.

Records Review

The site was not listed in the current environmental regulatory database obtained by Terracon.

A review of federal and state regulatory database information identified several listed facilities within the specified search area.

◼ Altom Transport

Altom Transport, located on adjacent property east, is identified as a Texas Commission on Environmental Quality (TCEQ) petroleum storage tank (PST) facility. Regulatory database information indicates that Altom Transport currently operates one 4,000-gallon diesel aboveground storage tank (AST) that was installed in October 2012. Regulatory information indicates that the AST has a concrete secondary containment. Altom

Transport is not listed as a SPILLS facility in regulatory database information. Per aerial photograph review, it appears that the AST is positioned approximately 150 feet east of the site. Based on the aboveground nature of the storage tank and absence of documented spills or releases, the Altom Transport facility does not represent an REC to the site.

◼ 7-Eleven Store 40991

7-Eleven Store 40991, located on a north adjacent property (addressed as 8929 West

Fairmont Parkway), was identified within the regulatory database as a TCEQ PST facility. This facility currently operates two 20,000-gallon underground storage tanks

(USTs) containing gasoline and diesel that were installed in 2014. At the time of the site reconnaissance, the fuel dispenser islands and tankhold were observed to be located approximately 240 feet north of the site. Based on the distance of the PST system from the site and relatively short duration of operations, the 7-Eleven Store 40991 facility does not constitute an REC to the site at this time.

◼ The remaining facilities listed in the database report do not appear to represent RECs to the site at this time based upon regulatory status, apparent topographic gradient, and/or distance from the site.

Pipeline Review

Terracon reviewed the on-line Railroad Commission of Texas (RRC) records (available through the RRC public GIS map viewer and related databases) to identify registered transmission pipelines on or adjacent to the site. On-line RRC records identified the following within the easement on the northern and western portions of the site:

◼ One active highly volatile liquid pipeline operated by Chevron Pipe Line Company

◼ Two active highly volatile liquid pipelines operated by Easton Energy Pipelines LLC

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◼ Three active refined liquid product pipelines operated by ExxonMobil Pipeline

Company

◼ One active highly volatile liquid pipeline operated by Ineos USA LLC

◼ Three active highly volatile liquid pipelines operated by ExxonMobil Pipeline

Company

◼ Two active highly volatile liquid pipelines operated by Shell Pipeline Company LP

◼ One active refined liquid project pipeline operated by Magellan Pipeline Company, L.P.

◼ One active highly volatile liquid pipeline operated by Permico Midstream Partners

LLC

◼ Two active natural gas pipelines operated by Kinder Morgan Tejas Pipeline LLC

◼ One active refined liquid product pipeline operated by Marathon Pipe Line LLC

◼ One active “other gas” pipeline operated by Shell Pipeline Company LP

◼ One active refined liquid product pipeline operated by Enterprise Products Operating

LLC

◼ Two active highly volatile liquid pipelines operated by Equistar Chemicals, LP

While it is possible that soil and groundwater at the site have been affected by releases from the pipelines, evidence of a release was not identified. It should be noted that if a pipeline release were discovered, the owner/operator of the pipeline is typically responsible for associated corrective actions. Based on the relatively short segment of each pipeline that transects or adjoins the site and Terracon’s experience investigating pipeline systems, it is our opinion that the likelihood of a release from the pipelines to have impacted the site is considered low enough not to constitute an REC to the site at this time.

Oil/Gas Well Review

Terracon reviewed the on-line RRC records to identify registered oil/gas wells located on or adjacent to the site. Based on the review of the RRC on-line well records, a dry hole

(a well that did not encounter sufficient quantities of oil or gas for production) was plotted in the southeast portion of the current site limits. At the time of the site reconnaissance, no apparent active E&P well pad sites were observed on the site. The use of drilling mud and management of produced fluids (i.e. produced water (brine), crude oil, and/or condensate) typically associated with oil/gas exploration sites commonly lead to soil and groundwater impact from metals and/or petroleum hydrocarbons above RRC action levels. Based on the frequency of releases associated with oil/gas exploration activities, potential releases from the apparent historical on-site oil/gas exploration activities appear to constitute an REC to the site.

Site Reconnaissance

Based on the site reconnaissance, RECs were not identified associated with the current site operations.

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Adjoining Properties

The site is bound to the north by West Fairmont Parkway followed by undeveloped land, Sunoco fueling station and residential development; to the east by Tracerco, Power Core, MSA

The Safety Company, IFI, Aztron Chemical Service, Harcros, Altom Transport Inc and undeveloped land; to the south by Coastal Water Authority Bayport Pump Station and undeveloped land; and to the west by a pipeline easement followed by a CenterPoint Energy

Substation, undeveloped land, Les Early Firearms Training Center, Pasadena Fire Training

Field, commercial businesses, CG Roxane and undeveloped land. Sunoco and Altom Transport

Inc were identified in regulatory database information and are further discussed above under

Records Review.

Additional Services

A Waters of the United States (WOTUS) Delineation Report, Threatened & Endangered

Species Habitat Assessment, and Cultural Resource Assessment – Desktop Review (Terracon

Project No. 92207764) are being conducted by Terracon concurrent with this Phase I ESA and will be delivered under separate covers.

Significant Data Gaps

Significant data gaps were not identified.

Conclusions

We have performed a Phase I ESA consistent with the procedures included in ASTM Practice

E 1527-13 of Red Bluff Regional Detention Basin (C-07) located at West Fairmont Parkway &

Genoa Red Bluff Road in La Porte, Harris County, Texas, the site. The following Recognized

Environmental Conditions (RECs) or Controlled RECs (CRECs) were identified in connection with the site:

◼ Potential releases from the apparent historical on-site oil/gas exploration activities constitute an REC to the site.

Recommendations

Based on the scope of services, limitations, and findings of this assessment, Terracon recommends a subsurface investigation at the site to assess if soil and/or groundwater have been impacted by the referenced REC.

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1.0 INTRODUCTION

1.1 Site Description

Site Name Red Bluff Regional Detention Basin (C-07)

Site Location/Address West Fairmont Parkway & Genoa Red Bluff Road

La Porte, Harris County, Texas

Land Area Approximately 326 acres

Site Improvements None

Anticipated Future Site Use Detention basins

Purpose of the ESA Due diligence requirements

The location of the site is depicted on Exhibit 1 of Appendix A, which was reproduced from a portion of the La Porte, Texas USGS 7.5-minute series topographic map. The site and adjoining properties are depicted on the Site Diagram, which is included as Exhibit 2 of Appendix A.

Acronyms and terms used in this report are described in Appendix F.

1.2 Scope of Services

This Phase I ESA was performed in accordance with Terracon Proposal No. P92207764 dated

July 28, 2021, and was conducted consistent with the procedures included in ASTM E1527-13, Standard Practice for Environmental Site Assessments: Phase I Environmental Site

Assessment Process. The purpose of this ESA was to assist the client in developing information to identify RECs in connection with the site as reflected by the scope of this report. This purpose was undertaken through user-provided information, a regulatory database review, historical and physical records review, interviews, including local government inquiries, as applicable, and a visual noninvasive reconnaissance of the site and adjoining properties. Limitations, ASTM deviations, and significant data gaps (if identified) are noted in the applicable sections of the report.

ASTM E1527-13 contains a new definition of "migrate/migration," which refers to “the movement of hazardous substances or petroleum products in any form, including, for example, solid and liquid at the surface or subsurface, and vapor in the subsurface.” By including this explicit reference to migration in ASTM E1527-13, the Standard clarifies that the potential for vapor migration should be addressed as part of a Phase I ESA. This Phase I ESA has considered vapor migration in evaluation of RECs associated with the site.

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1.3 Standard of Care

This ESA was performed in accordance with generally accepted practices of this profession, undertaken in similar studies at the same time and in the same geographical area. We have endeavored to meet this standard of care, but may be limited by conditions encountered during performance, a client-driven scope of work, or inability to review information not received by the report date. Where appropriate, these limitations are discussed in the text of the report, and an evaluation of their significance with respect to our findings has been conducted.

Phase I ESAs, such as the one performed at this site, are of limited scope, are noninvasive, and cannot eliminate the potential that hazardous, toxic, or petroleum substances are present or have been released at the site beyond what is identified by the limited scope of this ESA. In conducting the limited scope of services described herein, certain sources of information and public records were not reviewed. It should be recognized that environmental concerns may be documented in public records that were not reviewed. No ESA can wholly eliminate uncertainty regarding the potential for RECs in connection with a property. Performance of this practice is intended to reduce, but not eliminate, uncertainty regarding the potential for RECs. No warranties, express or implied, are intended or made. The limitations herein must be considered when the user of this report formulates opinions as to risks associated with the site or otherwise uses the report for any other purpose. These risks may be further evaluated – but not eliminated

– through additional research or assessment. We will, upon request, advise you of additional research or assessment options that may be available and associated costs.

1.4 Additional Scope Limitations, ASTM Deviations and Data Gaps

Based upon the agreed-on scope of services, this ESA did not include subsurface or other invasive assessments, vapor intrusion assessments or indoor air quality assessments (i.e.

evaluation of the presence of vapors within a building structure), business environmental risk evaluations, or other services not particularly identified and discussed herein. Credentials of the company (Statement of Qualifications) have not been included in this report but are available upon request. Pertinent documents are referred to in the text of this report, and a separate reference section has not been included. Reasonable attempts were made to obtain information within the scope and time constraints set forth by the client; however, in some instances, information requested is not, or was not, received by the issuance date of the report. Information obtained for this ESA was received from several sources that we believe to be reliable;

nonetheless, the authenticity or reliability of these sources cannot and is not warranted hereunder. This ESA was further limited by the following:

◼ Due to dense vegetation, portions of the site could not be accessed and surface conditions could not be observed.

◼ Requests were submitted to local government agencies regarding documented environmental conditions on the site. Responses from one or more agencies

Responsive ■ Resourceful ■ Reliable 3 were not received as of the issuance of this report. The absence of this information is not considered a significant data gap.

An evaluation of the significance of limitations and missing information with respect to our findings has been conducted, and where appropriate, significant data gaps are identified and discussed in the text of the report. However, it should be recognized that an evaluation of significant data gaps is based on the information available at the time of report issuance, and an evaluation of information received after the report issuance date may result in an alteration of our conclusions, recommendations, or opinions. We have no obligation to provide information obtained or discovered by us after the issuance date of the report, or to perform any additional services, regardless of whether the information would affect any conclusions, recommendations, or opinions in the report. This disclaimer specifically applies to any information that has not been provided by the client.

This report represents our service to you as of the report date and constitutes our final document; its text may not be altered after final issuance. Findings in this report are based upon the site’s current utilization, information derived from the most recent reconnaissance and from other activities described herein; such information is subject to change. Certain indicators of the presence of hazardous substances or petroleum products may have been latent, inaccessible, unobservable, or not present during the most recent reconnaissance and may subsequently become observable (such as after site renovation or development). Further, these services are not to be construed as legal interpretation or advice.

1.5 Reliance

This ESA report is prepared for the exclusive use and reliance of iGet Services LLC and the

Harris County Flood Control District (HCFCD). Use or reliance by any other party is prohibited without the written authorization of iGet Services LLC and Terracon Consultants, Inc.

(Terracon).

Reliance on the ESA by the client and all authorized parties will be subject to the terms, conditions and limitations stated in the proposal, ESA report, and the Agreement with

Independent Consultant between iGet Services LLC and Terracon Consultants Inc. The limitation of liability defined in the Agreement with Independent Consultant is the aggregate limit of Terracon’s liability to the client and all relying parties.

Continued viability of this report is subject to ASTM E1527-13 Sections 4.6 and 4.8. If the ESA will be used by a different user (third party) than the user for whom the ESA was originally prepared, the third party must also satisfy the user’s responsibilities in Section 6 of ASTM

E1527-13.

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1.6 Client Provided Information

Prior to the site visit, the client’s representative was asked to provide user questionnaire information as described in ASTM E1527-13 Section 6. HCFCD indicated they are unable to provide historical knowledge with regards to RECs for the project site.

2.0 PHYSICAL SETTING

Physical Setting Information Source

Topography

Site Elevation Approximately 15-25 feet above sea level USGS Topographic

Map, La Porte, Texas

Quadrangle, 1995

(Appendix A)

Topographic Gradient Relatively flat area with general gradient towards the south

Closest Surface Water Spring Gully (B109-00-00) located in the eastern site limits.

Soil Characteristics

Soil Type Lake Charles clay and Dylan clay

Harris County, TX

USDA-NRCS Web

Soil Survey Description

The Lake Charles series consist of deep, neutral, nearly level to gently sloping clayey soils on upland prairies. These soils are clayey throughout the profile and have wide deep cracks and intersecting slickensides. They formed in alkaline marine clay.

Typically, this soil is somewhat poorly drained.

Surface runoff, permeability, and internal drainage are very slow. The available water capacity is high. When this soil is dry, deep, wide cracks form on the surface. Water enters rapidly through the cracks, but it enters very slowly when the soil is wet and the cracks are sealed. There is a high risk of corrosion to uncoated steel.

The Dylan series consists of very deep, moderately well drained soils. These gently sloping to sloping soils formed in clayey alluvium.

Geology/Hydrogeology

Formation Beaumont Formation Geologic Atlas of

Texas, Houston

Sheet, 1982 Description

Heterogeneous formation containing thick interbedded layers of clay, fine sand, and silt.

Estimated Depth to First

Occurrence of

Groundwater

Approximately 20-40 feet below ground surface

(bgs)

Terracon’s experience of the site vicinity

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Physical Setting Information Source

*Hydrogeologic Gradient Not known - may be inferred to be parallel to topographic gradient

(generally to the south).

* The groundwater flow direction and the depth to shallow, unconfined groundwater, if present, would likely vary depending upon seasonal variations in rainfall and other hydrogeological features. Without the benefit of on-site groundwater monitoring wells surveyed to a datum, groundwater depth and flow direction beneath the site cannot be directly ascertained.

3.0 HISTORICAL USE INFORMATION

Terracon reviewed the following historical sources to develop a history of the previous uses of the site and surrounding area, in order to help identify RECs associated with past uses. Copies of selected historical documents are included in Appendix C.

3.1 Historical Topographic Maps, Aerial Photographs, Sanborn Maps

Readily available historical USGS topographic maps and selected historical aerial photographs

(at approximately 10 to 15 year intervals) were reviewed to evaluate land development and obtain information concerning the history of development on and near the site. Reviewed historical topographic maps and aerial photographs are summarized below.

Historical fire insurance maps produced by the Sanborn Map Company were requested from

GeoSearch to evaluate past uses and relevant characteristics of the site and surrounding properties. Based upon inquiries to the above-listed Sanborn provider, Sanborn maps were not available for the site.

◼ Topographic map: La Porte, Texas, published 1916, 1”=2,000’

◼ Topographic map: La Porte, Texas, published 1920, 1”=2,640’

◼ Topographic map: Friendswood, Texas, published 1925, 1”=5,208’

◼ Topographic map: La Porte, Texas, published 1943, 1”=2,640’

◼ Aerial photograph: ASCS, photo ID# 7-80, April 11, 1944, 1”=700’

◼ Topographic map: La Porte, Texas, published 1947, 1”=2,083’

◼ Aerial photograph: ASCS, photo ID# 15-14, May 5, 1953, 1”=700’

◼ Topographic map: La Porte, Texas, published 1955, 1”=2,000’

◼ Aerial photograph: USGS, photo ID# 2-57, October 31, 1962, 1”=700’

◼ Topographic map: La Porte, Texas, published 1967, 1”=2,000’

◼ Aerial photograph: Wallace, photo ID# 26, February 21, 1969, 1”=700’

◼ Aerial photograph: USGS, photo ID# 1-26, November 12, 1974, 1”=700’

◼ Aerial photograph: TXDOT, photo ID# 511-95, April 5, 1979, 1”=700’

◼ Topographic map: La Porte, Texas, published 1982, 1”=2,000’

◼ Aerial photograph: USGS, photo ID# 511-95, January 31, 1982, 1”=700’

◼ Aerial photograph: TXDOT, photo ID# 94, October 9, 1989, 1”=700’

◼ Topographic map: La Porte, Texas, published 1995, 1”=2,000’

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◼ Aerial photograph: USGS, photo ID# N/A, January 15, 1995, 1”=700’

◼ Aerial photograph: USDA, photo ID# N/A, 2004, 1”=700’

◼ Aerial photograph: USDA, photo ID# N/A, 2005, 1”=700’

◼ Aerial photograph: USDA, photo ID# N/A, 2006, 1”=700’

◼ Aerial photograph: USDA, photo ID# N/A, 2010, 1”=700’

◼ Aerial photograph: USDA, photo ID# N/A, 2012, 1”=700’

◼ Topographic map: La Porte, Texas, published 2013, 1”=2,000’

◼ Aerial photograph: USDA, photo ID# N/A, 2014, 1”=700’

◼ Aerial photograph: USDA, photo ID# N/A, 2016, 1”=700’

◼ Aerial photograph: USDA, photo ID# N/A, 2018, 1”=700’

Historical Maps and Aerial Photographs

Direction Description

Site

Primarily undeveloped land with two apparent residential structures and transected by unimproved roads, drainage features and Spring Gully (B109-00-00) (1916-1925); one of the structures is no longer depicted (1943); primarily undeveloped land with a rural residential development; the site is transected by unimproved roads, drainage features and Spring Gully (B109-00-00) and an apparent oil/gas well drill pad site is visible on the southeast portion of the site (1944-1947); remnants of the oil/gas well drill pad site are visible and the northwest portion of the site is transected by a pipeline easement (1953);

primarily undeveloped land with an apparent residential development and transected by unimproved roads, drainage features and Spring Gully (B109-00-00) (1955-1969); the residential structure is no longer visible (1974); undeveloped land transected by drainage features and Spring Gully (B109-00-00) (1979-1989); a pipeline easement is depicted transecting the northern site limits (1995-2010); the site is transected by Genoa Red Bluff, a drainage channel and a sidewalk (2012-2018)

North

Undeveloped land transected by a roadway (1916-1943); a pipeline easement is visible transecting this property (1944-1995); West Fairmont Parkway followed by undeveloped land transected by a pipeline easement and residential development (2004-2014); the current fueling station is visible (2016-2018)

East Undeveloped land transected by an unimproved road (1916-1995); commercial development and undeveloped land (2004-2018)

South

Undeveloped land transected by Spring Gully (B109-00-00), a drainage feature and an unimproved road (1916-1925); oil/gas exploration and production (E&P) activity is visible further south of the site (1943-1969); undeveloped land transected by Spring Gully (B109-

00-00); E&P activity is no longer apparent (1974); the current Coastal Water Authority

Bayport Pump Station facility is visible (1979-2018)

West

Undeveloped land transected by unimproved roads or drainage features (1916-1943); a pipeline easement is visible transecting the property (1944-1953); a powerline easement is depicted (1955); E&P activity is visible further west of the site (1962-1969); the current pipeline easement is visible (1974); the substation is visible beyond the pipeline/powerline easement (1979-1995); commercial development is visible beyond the pipeline/powerline easement (2004-2018)

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The on-site oil/gas exploration activity and the pipeline easements are further discussed in

Section 4.3.

The fueling station located north of the site was identified in regulatory database information and is further discussed in Section 4.1.

3.2 Historical City Directories

The Cole and InfoUSA city directories used in this study were made available through

GeoSearch (selected years reviewed: 1960-2021) and were reviewed at approximate five-year intervals. Since these references are copyright protected, reproductions are not provided in this report. The site consists of undeveloped land; therefore, no physical street addresses were identified for the site.

Historical City Directories

Direction Description

Site No addresses identified

North 8929 Fairmont Parkway: No listing (1976-2021)

East

4106 New West Drive: No listing (1991-2003); Sulzer Chem Tech USA (2008); Johnson

Matthey Catalysts (2014-2021); Tracerco (2014-2021)

4130 New West Drive: No listing (1991-2021)

4200 New West Drive: No listing (1991-2014); Aegis Flow Technology, Moody Price

(2019-2021)

4200B New West Drive: No listing (1991-2014); Trieagle Industrial Service (2019-2021)

4330 New West Drive: No listing (1991-2021)

4450 New West Drive: No listing (1991-2008); Ralph Baughman (2014); International

Fumigators Inc (2014-2021); Ralph Baughman (2021)

4530 New West Drive: No listing (1991-2003); Aztron Chemical Services (2008-2021)

4606 New West Drive: No listing (1991-2003); Harcros Chemical Inc (2008-2021)

4700 New West Drive: No listing (1991-1997); Aluma Systems Inc (2003); Brand

Services Inc (2008); Warren Oil (2014-2019); no listing (2021)

South 8821 ½ Red Bluff Road: No Listing (1967-1997/98); Coastal Water Authority (2001); no listing (2008-2016)

West

6052 Genoa Red Bluff Road: No listing (1960-2016); Pasadena Police Academy (2021)

6013 Genoa Red Bluff Road: No listing (1960-2021)

6060 Genoa Red Bluff Road: No listing (1960-2021)

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3.3 Site Ownership

Based on a review of information obtained from the on-line Harris County Appraisal District records, the site consists of numerous tracts of land currently owned by Harris County Flood

Control District.

3.4 Title Search

At the direction of the client, a title search was not included as part of the scope of services.

Unless notified otherwise, we assume that the client is evaluating this information outside the scope of this report.

3.5 Environmental Liens and Activity and Use Limitations

While not requested by the client, the GeoSearch regulatory database report included a review of both Federal and State Engineering Control (EC) and Institutional Control (IC) databases.

Based on a review of the database report, the project site was not listed on the EC or IC databases. Please note that in addition to these federal and state listings, AULs can be recorded at the county and municipal level that may not be listed in the regulatory database report. HCFCD indicated that no environmental liens or activity and use limitations exist for

HCFCD-owned properties.

3.6 Interviews Regarding Current and Historical Site Uses

No owner contact information was provided. Based on availability of historical resources for the site, this is not considered a significant data gap.

3.7 Prior Report Review

Terracon requested the client provide any previous environmental reports they are aware of for the site. Previous reports were not provided by the client to Terracon for review.

4.0 RECORDS REVIEW

Regulatory database information was provided by GeoSearch, a contract information services company. The purpose of the records review was to identify RECs in connection with the site.

Information in this section is subject to the accuracy of the data provided by the information services company and the date at which the information is updated. The scope herein did not include confirmation of facilities listed as "unmappable" by regulatory databases.

In some of the following subsections, the words up-gradient, cross-gradient and down-gradient refer to the topographic gradient in relation to the site. As stated previously, the groundwater flow direction and the depth to shallow groundwater, if present, would likely vary depending

Responsive ■ Resourceful ■ Reliable 9 upon seasonal variations in rainfall and the depth to the soil/bedrock interface. Without the benefit of on-site groundwater monitoring wells surveyed to a datum, groundwater depth and flow direction beneath the site cannot be directly ascertained.

4.1 Federal and State/Tribal Databases

Listed below are the facility listings identified on federal and state/tribal databases within the

ASTM-required search distances from the approximate site boundaries. Database definition, descriptions, and the database search report are included in Appendix D.

Federal Databases

Database Description Distance

(miles) Listings

BF Brownfields Management System 0.5 0

SEMS Superfund Enterprise Management System 0.5 0

SEMSARCH Superfund Enterprise Management System Archived Site

Inventory

0.5 0

DNPL Delisted National Priorities List 1 0

EC Federal Engineering Institutional Control Sites Site 0

ERNSTX Emergency Response Notification System Site 0

LUCIS Land Use Control Information System 0.5 0

NFRAP No Further Remedial Action Planned Sites 0.5 0

RCRAGR Resource Conservation & Recovery Act Generator Facilities 0.1 2

RCRANGR RCRA Non-Generator Facilities 0.1 2

RCRASUBC RCRA – Subject to Corrective Action Facilities 1 1

NLRRCRAC No Longer Regulated RCRA Generator Facilities 1 0

NLRRCRAT No Longer Regulated RCRA Non-CORRACTS TSD Facilities 0.5 1

NPL National Priorities List 1 0

PNPL Proposed National Priorities List 1 0

RCRAC RCRA - Corrective Action Facilities 1 1

RCRAT RCRA - Treatment Storage & Disposal Facilities 0.5 1

State/Tribal Databases

Distance

(miles) Listings

BSA Brownfields Site Assessments 0.5 0

CALF Closed & Abandoned Landfill Inventory 0.5 1

DCR Dry Cleaner Registration Database 0.25 0

Responsive ■ Resourceful ■ Reliable 10

Distance

(miles) Listings

IHW Industrial and Hazardous Waste Sites 0.1 3

IOP Innocent Owner / Operator Database 0.25 0

LPST Leaking Petroleum Storage Tanks 0.5 0

LUSTR06 Leaking Underground Storage Tanks On Tribal Lands

(Region 6 States)

0.5 0

MSWLF Municipal Solid Waste Landfill Sites 0.5 0

PIHW Permitted Industrial Hazardous Waste Sites 0.1 0

PST Petroleum Storage Tanks 0.1 2

RRCVCP Railroad Commission VCP and Brownfield Sites 0.5 0

SF State Superfund 1 0

SPILLS Spills Listing Site 0

APAR Affected Property Assessment Reports 0.5 0

DCRPS Dry Cleaner Remediation Program Sites 0.5 0

IHWCA Industrial and Hazardous Waste Corrective Action Sites 0.5 4

MSD Municipal Setting Designations Site 0

NOV Notice of Violations Site 0

SIEC01 State Institutional/Engineering Control Sites Site 0

USTR06 Underground Storage Tanks On Tribal Lands (Region 6

States)

0.1 0

VCP Voluntary Cleanup Program 0.5 0

WMRF Recycling Facilities Site 0

In addition to the above ASTM-required listings, Terracon reviewed other federal, state, local, and proprietary databases provided by the database firm. A list of the additional reviewed databases is included in the regulatory database report included in Appendix D.

The following table summarizes the site-specific information provided by the database and/or gathered by this office for identified facilities. Facilities are listed in order of proximity to the site.

Additional discussion for selected facilities follows the summary table.

Listed Facilities

Facility Name And

Location

Estimated Distance /

Direction/Gradient

Database

Listings

Is a REC, CREC, or

HREC to the Site

Altom Transport

4700 New West Drive

Adjacent property / E /

Cross-gradient

PST No, further discussed below

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Facility Name And

Location

Estimated Distance /

Direction/Gradient

Database

Listings

Is a REC, CREC, or

HREC to the Site

7-Eleven Store 40991

8929 West Fairmont

Parkway

Adjacent property / N /

Up-gradient

PST No, further discussed below

Pentair Valves And

Controls New Decade Dr

9560 New Decade Drive

Approximately 385 feet / E /

Cross-gradient

IHW, RCRANGR No

Wilhelmsen Ships Service

9400 New Century Drive

Approximately 475 feet / E /

Cross-gradient

IHW, RCRAGR,

RCRANGR

No

Pentair Valves and Controls

New West Rd / Tyco

Valves; Controls

4607 New West Drive

Approximately 420 feet / E /

Cross-gradient

IHW, RCRAGR No

Gatx Fast Track T90

Pasadena

5100 Underwood Road

Approximately 0.39 mile / E /

Cross-gradient

IHWCA No

Techemet Genoa Red Bluff

Road Facility

6025 Genoa Red Bluff

Road

Approximately 0.4 mile / W /

Cross-gradient

IHWCA No

Clear Lake-U of H site

SW intx Underwood &

Fairmont Parkway

Approximately 0.41 mile / E /

Cross-gradient

CALF No

Centauri Technologies LP

5200 Underwood Road

Approximately 0.42 mile / E /

Cross-gradient

NLRRCRAT No

Bayport EO Plant / Sunoco

Bayport Bpt1

5761 Underwood Road

Approximately 0.475 mile / E /

Cross-gradient

IHWCA (2),

RCRAC

RCRASUBC,

RCRAT

No

Altom Transport

Altom Transport, located on adjacent property east, is identified as a Texas Commission on

Environmental Quality (TCEQ) petroleum storage tank (PST) facility. Regulatory database information indicates that Altom Transport currently operates one 4,000-gallon diesel aboveground storage tank (AST) that was installed in October 2012. Regulatory information indicates that the AST has a concrete secondary containment. Altom Transport is not listed as a

SPILLS facility in regulatory database information. Per aerial photograph review, it appears that the AST is positioned approximately 150 feet east of the site. Based on the aboveground nature of the storage tank and absence of documented spills or releases, the Altom Transport facility does not represent an REC to the site.

7-Eleven Store 40991

7-Eleven Store 40991, located on a north adjacent property (addressed as 8929 West Fairmont

Parkway), was identified within the regulatory database as a TCEQ PST facility. This facility

Responsive ■ Resourceful ■ Reliable 12 currently operates two 20,000-gallon underground storage tanks (USTs) containing gasoline and diesel that were installed in 2014. At the time of the site reconnaissance, the fuel dispenser islands and tankhold were observed to be located approximately 240 feet north of the site.

Based on the distance of the PST system from the site and relatively short duration of operations, the 7-Eleven Store 40991 facility does not constitute an REC to the site at this time.

The remaining facilities listed in the database report do not appear to represent RECs to the site at this time based upon regulatory status, apparent topographic gradient, and/or distance from

Unmapped facilities are those that do not contain sufficient address or location information to evaluate the facility listing locations relative to the site. The report did not list facilities in the unmapped section.

4.2 Local Agency Inquiries

Agency Contacted/

Contact Method Response

The Harris County Pollution

Control Services / via email

At the issuance of this report, a response had not been received from the Harris County Pollution Control. The request submitted to the

Harris County Pollution Control Services is provided in Appendix D.

The Harris County Fire Marshal

/ via letter

At the issuance of this report, a response had not been received from the Harris County Fire Marshal. The request submitted to the Harris

County Fire Marshal is provided in Appendix D.

The Harris County Public

Infrastructure Department / via email

At the issuance of this report, a response had not been received from the Harris County Public Infrastructure Department. The request submitted to the Harris County Public Infrastructure Department is provided in Appendix D.

City of La Porte / via email At the issuance of this report, a response had not been received from the City of La Porte. The request submitted to the City of La Porte is provided in Appendix D.

4.3 Local Area Knowledge

Pipeline Review

Terracon reviewed the on-line Railroad Commission of Texas (RRC) records (available through the RRC public GIS map viewer and related databases) to identify registered transmission pipelines on or adjacent to the site. On-line RRC records identified the following within the easement on the northern and western portions of the site:

◼ One active highly volatile liquid pipeline operated by Chevron Pipe Line Company

◼ Two active highly volatile liquid pipelines operated by Easton Energy Pipelines LLC

◼ Three active refined liquid product pipelines operated by ExxonMobil Pipeline Company

Responsive ■ Resourceful ■ Reliable 13

◼ One active highly volatile liquid pipeline operated by Ineos USA LLC

◼ Three active highly volatile liquid pipelines operated by ExxonMobil Pipeline Company

◼ Two active highly volatile liquid pipelines operated by Shell Pipeline Company LP

◼ One active refined liquid project pipeline operated by Magellan Pipeline Company, L.P.

◼ One active highly volatile liquid pipeline operated by Permico Midstream Partners LLC

◼ Two active natural gas pipelines operated by Kinder Morgan Tejas Pipeline LLC

◼ One active refined liquid product pipeline operated by Marathon Pipe Line LLC

◼ One active “other gas” pipeline operated by Shell Pipeline Company LP

◼ One active refined liquid product pipeline operated by Enterprise Products Operating

LLC

◼ Two active highly volatile liquid pipelines operated by Equistar Chemicals, LP

While it is possible that soil and groundwater at the site have been affected by releases from the pipelines, evidence of a release was not identified. It should be noted that if a pipeline release were discovered, the owner/operator of the pipeline is typically responsible for associated corrective actions. Based on the relatively short segment of each pipeline that transects or adjoins the site and Terracon’s experience investigating pipeline systems, it is our opinion that the likelihood of a release from the pipelines to have impacted the site is considered low enough not to constitute an REC to the site at this time. A copy of the on-line RRC map and Pipeline

Attributes can be found in Appendix D.

Oil/Gas Well Review

Terracon reviewed the on-line RRC records to identify registered oil/gas wells located on or adjacent to the site. Based on the review of the RRC on-line well records, a dry hole (a well that did not encounter sufficient quantities of oil or gas for production) was plotted in the southeast portion of the current site limits. At the time of the site reconnaissance, no apparent active E&P well pad sites were observed on the site. The use of drilling mud and management of produced fluids (i.e. produced water (brine), crude oil, and/or condensate) typically associated with oil/gas exploration sites commonly lead to soil and groundwater impact from metals and/or petroleum hydrocarbons above RRC action levels. Based on the frequency of releases associated with oil/gas exploration activities, potential releases from the apparent historical on-site oil/gas exploration activities appear to constitute an REC to the site. A copy of the on-line RRC map and well information can be found in Appendix D.

Houston-Galveston Area Council

The HGAC maintains a multi-county database of permitted and unpermitted closed landfills.

According to the HGAC website, one closed landfill was identified to be located near the southwest corner of West Fairmont Parkway and Underwood Road. Review of on-line HGAC information indicates that sewage sludge was dumped into trenches. This facility was identified in regulatory database information and based on the distance from the site, does not represent an REC to the site. A copy of the on-line HGAC map is included in Appendix D.

Responsive ■ Resourceful ■ Reliable 14

5.0 SITE RECONNAISSANCE

5.1 General Site Information

Information contained in this section is based on a visual reconnaissance conducted while walking through the site and the accessible interior areas of structures, if any, located on the site. The site and adjoining properties are depicted on the Site Diagram, which is included in

Exhibit 2 of Appendix A. Photo documentation of the site at the time of the visual reconnaissance is provided in Appendix B. Credentials of the individuals planning and conducting the site visit are included in Appendix E.

General Site Information

Site Reconnaissance

Field Personnel Christina Rosilez

Reconnaissance Date August 30, 2021

Weather Conditions Hot / sunny

Site Contact/Title None

5.2 Overview of Current Site Occupants

The site is currently comprised of undeveloped land; therefore, there are no current site occupants.

5.3 Overview of Current Site Operations

As understood by Terracon, the project (site) consists of two adjacent proposed detention basins (B509-04-00 and B509-03-00) located in the southwest and southeast corners of the intersection of West Fairmont Parkway and Genoa Red Bluff Road, in La Porte, Harris County, Texas. The site consists of approximately 326 acres of undeveloped, wooded land, and includes the corresponding segment of the HCFCD channel to the east (Spring Gully – B109-00-00). The proposed detention basins are bisected by Genoa Red Bluff Road and an overhead electrical power line easement.

5.4 Site Observations

The following table summarizes site observations and interviews. Affirmative responses

(designated by an “X”) are discussed in more detail following the table.

Responsive ■ Resourceful ■ Reliable 15

Site Characteristics

Category Item or Feature Observed or

Identified

Site Operations, Processes, and

Equipment

Emergency generators

Elevators

Air compressors

Hydraulic lifts

Dry cleaning

Photo processing

Ventilation hoods and/or incinerators

Waste treatment systems and/or water treatment systems

Heating and/or cooling systems

Paint booths

Sub-grade mechanic pits

Wash-down areas or carwashes

Pesticide/herbicide production or storage

Printing operations

Metal finishing (e.g., electroplating, chrome plating, galvanizing, etc.)

Salvage operations

Oil, gas or mineral production

Other processes or equipment

Aboveground Chemical or Waste

Storage

Aboveground storage tanks

Drums, barrels and/or containers 5 gallons

MSDS or SDS

Underground Chemical or Waste Storage, Drainage or Collection Systems

Underground storage tanks or ancillary UST equipment

Sumps, cisterns, French drains, catch basins and/or dry wells

Grease traps

Septic tanks and/or leach fields

Oil/water separators, clarifiers, sand traps, triple traps, interceptors

Pipeline markers X

Interior floor drains

Electrical Transformers/

PCBs

Transformers and/or capacitors

Other equipment

Responsive ■ Resourceful ■ Reliable 16

Category Item or Feature Observed or

Identified

Releases or Potential Releases

Stressed vegetation

Stained soil

Stained pavement or similar surface

Leachate and/or waste seeps

Trash, debris and/or other waste materials

Dumping or disposal areas

Construction/demolition debris and/or dumped fill dirt

Surface water discoloration, odor, sheen, and/or free floating product

Strong, pungent or noxious odors

Exterior pipe discharges and/or other effluent discharges

Other Notable Site Features

Surface water bodies X

Quarries or pits

Wastewater lagoons

Wells

Underground Chemical or Waste Storage, Drainage or Collection Systems

Pipeline markers

Pipeline markers were observed within a pipeline easement transecting the northern portion of the site. The on-site pipelines are further discussed in Section 4.3.

Other Notable Site Features

Surface water bodies

A drainage feature transects the central portion of the site and Spring Gully (B109-00-00) is located on the eastern portion of the site. No evidence of chemical sheens was observed on the surface of the waters, and no noxious odors were noted emanating from within the bayou or drainage feature at the time of the site reconnaissance.

6.0 ADJOINING PROPERTY RECONNAISSANCE

Visual observations of adjoining properties (from site boundaries) are summarized below.

Responsive ■ Resourceful ■ Reliable 17

Adjoining Properties

Direction Description

North West Fairmont Parkway followed by undeveloped land, Sunoco fueling station and residential development

East Tracerco, Power Core, MSA The Safety Company, IFI, Aztron Chemical Service, Harcros, Altom Transport Inc and undeveloped land

South Coastal Water Authority Bayport Pump Station and undeveloped land

West A pipeline easement followed by a CenterPoint Energy Substation, undeveloped land, Les Early Firearms Training Center, Pasadena Fire Training Field, commercial businesses, CG Roxane and undeveloped land

The fueling station located north of the site and Altom Transport located east of the site were identified in regulatory database information and are further discussed in Section 4.1.

7.0 ADDITIONAL SERVICES

A Waters of the United States (WOTUS) Delineation Report, Threatened & Endangered

Species Habitat Assessment, and Cultural Resource Assessment – Desktop Review (Terracon