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4400 Black Avenue
<br />Pleasanton, California
<br />648-26-2
<br />Page 1
<br />Type of Services Phase I Environmental Site Assessment
<br />Location 4400 Black Avenue
<br />Pleasanton, California
<br />SECTION 1: INTRODUCTION
<br />This report presents the results of the Phase I Environmental Site Assessment (ESA) performed
<br />at 4400 Black Avenue in Pleasanton, California (Site) as shown on Figures 1 and 2. This work
<br />was performed for TTLC Management, Inc., An Arizona Corporation (TTLC Management) in
<br />accordance with our April 1, 2022 Agreement (Agreement).
<br />1.1 PURPOSE
<br />The scope of work presented in the Agreement was prepared in general accordance with ASTM
<br />E1527-13 and E1527-21 titled, “Standard Practice for Environmental Site Assessments: Phase
<br />I Environmental Site Assessment Process” (ASTM Standard). The ASTM Standard is in
<br />general compliance with the Environmental Protection Agency (EPA) rule titled, “Standards and
<br />Practices for All Appropriate Inquiries; Final Rule” (AAI Rule, 40 CFR Part 312). The purpose of
<br />this Phase I ESA is to strive to identify, to the extent feasible pursuant to the scope of work
<br />presented in the Agreement, Recognized Environmental Conditions at the Site.
<br />As defined by ASTM E1527-21, the term Recognized Environmental Condition means 1) the
<br />presence of hazardous substances or petroleum products in, on, or at the subject property due
<br />to a release to the environment; 2) the likely presence of hazardous substances or petroleum
<br />products in, on, or at the subject property due to a release or likely release to the environment;
<br />or 3) the presence of hazardous substances or petroleum products in, on, or at the subject
<br />property under conditions that pose a material threat of a future release to the environment. A
<br />de minimis condition 1 is not a recognized environmental condition.
<br />Cornerstone Earth Group, Inc. (Cornerstone) understands that TTLC Management intends to
<br />purchase the property for residential redevelopment. We performed this Phase I ESA to
<br />support TTLC Management in evaluation of Recognized Environmental Conditions at the Site.
<br />This Phase I ESA is intended to reduce, but not eliminate, uncertainty regarding the potential for
<br />Recognized Environmental Conditions at the Site.
<br />1.2 SCOPE OF WORK
<br />As presented in our Agreement, the scope of work performed for this Phase I ESA included the
<br />following:
<br />1 A de minimis condition is defined by the ASTM Standard as a condition related to a release that generally does not present a
<br />threat to human health or the environment and that generally would not be the subject of an enforcement action if brought to the
<br />attention of appropriate governmental agencies.
<br />ronmental Site Assessment (ESA) performed ronmental Site Assessment (ESA) performed
<br />(Site) as shown on Figures 1 and 2. This work (Site) as shown on Figures 1 and 2. This work
<br />TTLC Management, Inc., An Arizona Corporation TTLC Management, Inc., An Arizona Corporation (TTLC ManagementTTLC Management
<br />(Agreement). (Agreement).
<br />The scope of work presented in the Agreement was prepared in general accordance with ASTM The scope of work presented in the Agreement was prepared in general accordance with ASTM
<br />titled, “Standard Practice for Environmental Site Assessments: Phase titled, “Standard Practice for Environmental Site Assessments: Phase
<br />I Environmental Site Assessment Process” (ASTM Standard). ThI Environmental Site Assessment Process” (ASTM Standard). The e ASTM Standard is in ASTM Standard is in
<br />general compliance with the Environmental Protection Agency (EPA) rule Protection Agency (EPA) rule
<br />Practices for All Appropriate Inquiries; Final Rule” (AAI Rule, 40 CFR Practices for All Appropriate Inquiries; Final Rule” (AAI Rule, 40 CFR
<br />this Phase I ESA is to strive to identify, to the extent feasible pursuant to the scope of work this Phase I ESA is to strive to identify, to the extent feasible pursuant to the scope of work
<br />presented in the Agreement, Recognized Environmental Conditions at the presented in the Agreement, Recognized Environmental Conditions at the
<br />As defined by ASTM E1527As defined by ASTM E1527--2121, the term Recognized E, the term Recognized E
<br />presence of hazardous substances or petroleum products in, on, or at the subject property due presence of hazardous substances or petroleum products in, on, or at the subject property due
<br />to a release to the environment; 2) the likely presence of hazardous substances or petroleum to a release to the environment; 2) the likely presence of hazardous substances or petroleum
<br />products in, on, or at the subject property due to a release or likely release to the environment; products in, on, or at the subject property due to a release or likely release to the environment;
<br />he presence of hazardous substances or petroleum products in, on, or at the subject he presence of hazardous substances or petroleum products in, on, or at the subject
<br />property under conditions that pose a material threat of a future release to the environment. A property under conditions that pose a material threat of a future release to the environment. A
<br />de minimis conditionde minimis condition 1 is not a recognized environmental condition.is not a recognized environmental condition.
<br />rstone Earth Group, Inc. (Cornerstone) rstone Earth Group, Inc. (Cornerstone)
<br />property property for residential redevelopment. We performed this Phase I ESA to for residential redevelopment. We performed this Phase I ESA to
<br />TTLC ManagementTTLC Management
<br />This Phase I ESA is intended to reduce, but not eliminate, uncertainty regarding the potential for This Phase I ESA is intended to reduce, but not eliminate, uncertainty regarding the potential for
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