{"id":91880,"date":"2026-04-01T01:05:57","date_gmt":"2026-04-01T01:05:57","guid":{"rendered":"https:\/\/gaeatech.com\/knowledge-center\/?p=91880"},"modified":"2026-04-05T01:47:12","modified_gmt":"2026-04-05T01:47:12","slug":"identifying-hazardous-substances-petroleum-phase-1-esa","status":"publish","type":"post","link":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/","title":{"rendered":"Identifying Hazardous Substances and Petroleum Products in a Phase I Environmental Site Assessment"},"content":{"rendered":"\n<p>A Phase I Environmental Site Assessment (ESA) is a critical step in environmental due diligence, designed to identify potential environmental contamination liabilities associated with a property. Conducted in accordance with ASTM E1527-21, the Phase I ESA focuses on determining the presence or likely presence of <strong>hazardous substances and petroleum products<\/strong> through a structured, non-intrusive process.<\/p>\n\n\n\n<p>Unlike Phase II investigations, which involve sampling and laboratory analysis, a Phase I ESA relies entirely on <strong>qualitative data collection and professional interpretation<\/strong>. The goal is to identify <strong>Recognized Environmental Conditions (RECs)<\/strong>\u2014indicators of contamination resulting from past or current releases, or the potential for future releases.<\/p>\n\n\n\n<p>This post provides a comprehensive overview of how hazardous substances and petroleum products are identified in a Phase I ESA, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Records review<\/li>\n\n\n\n<li>Site reconnaissance<\/li>\n\n\n\n<li>Interviews<\/li>\n\n\n\n<li>Storage conditions and quantities<\/li>\n\n\n\n<li>Disposal methods<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-understanding-hazardous-substances-and-petroleum-products\">Understanding Hazardous Substances and Petroleum Products<\/h2>\n\n\n\n<p>Before diving into the identification process, it is important to understand what constitutes hazardous substances and petroleum products in the context of a Phase I ESA.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-hazardous-substances\">Hazardous Substances<\/h3>\n\n\n\n<p>Hazardous substances are defined under environmental regulations and typically include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Industrial chemicals and solvents<\/li>\n\n\n\n<li>Heavy metals (e.g., lead, arsenic, mercury)<\/li>\n\n\n\n<li>Polychlorinated biphenyls (PCBs)<\/li>\n\n\n\n<li>Pesticides and herbicides<\/li>\n\n\n\n<li>Hazardous wastes<\/li>\n<\/ul>\n\n\n\n<p>These materials can pose risks to human health and the environment if released into soil, groundwater, or air.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-petroleum-products\">Petroleum Products<\/h3>\n\n\n\n<p>Petroleum products include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gasoline<\/li>\n\n\n\n<li>Diesel fuel<\/li>\n\n\n\n<li>Heating oil<\/li>\n\n\n\n<li>Lubricating oils<\/li>\n\n\n\n<li>Jet fuel and other refined hydrocarbons<\/li>\n<\/ul>\n\n\n\n<p>While petroleum is regulated differently than many hazardous substances, it is still a major focus of Phase I ESAs due to its prevalence and potential for contamination.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-non-intrusive-nature-of-a-phase-i-esa\">The Non-Intrusive Nature of a Phase I ESA<\/h2>\n\n\n\n<p>A defining characteristic of a Phase I ESA is that it is <strong>non-intrusive<\/strong>. This means:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No soil, groundwater, or vapor samples are collected<\/li>\n\n\n\n<li>No drilling, excavation, or testing is performed<\/li>\n\n\n\n<li>Conclusions are based on observation, documentation, and professional judgment<\/li>\n<\/ul>\n\n\n\n<p>This approach allows for a cost-effective and efficient assessment while still providing valuable insight into potential environmental risks.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-records-review-building-the-historical-context\">Records Review: Building the Historical Context<\/h2>\n\n\n\n<p>The records review is one of the most important components of a Phase I ESA. It provides a historical framework that helps identify <strong>potentially contaminating activities (PCAs)<\/strong> associated with the property and surrounding area.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-historical-sources\">Historical Sources<\/h3>\n\n\n\n<p>Environmental professionals review a range of historical documents, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aerial photographs<\/li>\n\n\n\n<li>Fire insurance maps (e.g., Sanborn maps)<\/li>\n\n\n\n<li>Topographic maps<\/li>\n\n\n\n<li>City directories<\/li>\n\n\n\n<li>Land title records<\/li>\n<\/ul>\n\n\n\n<p>These sources help reconstruct the historical use of the property and identify activities that may have involved hazardous substances or petroleum products.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-regulatory-database-searches\">Regulatory Database Searches<\/h3>\n\n\n\n<p>A comprehensive regulatory review is conducted to identify listings related to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Underground storage tanks (USTs)<\/li>\n\n\n\n<li>Aboveground storage tanks (ASTs)<\/li>\n\n\n\n<li>Hazardous waste generators<\/li>\n\n\n\n<li>Spill incidents and cleanup cases<\/li>\n\n\n\n<li>Landfills and disposal sites<\/li>\n<\/ul>\n\n\n\n<p>This includes searching federal, provincial\/state, and local databases.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-identifying-potentially-contaminating-activities-pcas\">Identifying Potentially Contaminating Activities (PCAs)<\/h3>\n\n\n\n<p>Through records review, environmental professionals identify PCAs such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gas stations and fuel depots<\/li>\n\n\n\n<li>Dry cleaners (solvent use)<\/li>\n\n\n\n<li>Manufacturing facilities<\/li>\n\n\n\n<li>Automotive repair shops<\/li>\n\n\n\n<li>Agricultural chemical storage<\/li>\n<\/ul>\n\n\n\n<p>These activities are associated with a higher likelihood of hazardous material use and potential releases.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-why-records-review-matters\">Why Records Review Matters<\/h3>\n\n\n\n<p>Records review helps answer key questions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What activities historically occurred on the site?<\/li>\n\n\n\n<li>Were hazardous materials used or stored?<\/li>\n\n\n\n<li>Are there documented spills or regulatory issues?<\/li>\n<\/ul>\n\n\n\n<p>This information sets the stage for targeted site reconnaissance and informed interviews.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-site-reconnaissance-observing-current-conditions\">Site Reconnaissance: Observing Current Conditions<\/h2>\n\n\n\n<p>Site reconnaissance involves a <strong>visual inspection of the property and adjacent areas<\/strong>. It provides real-time insight into current conditions and helps confirm or challenge findings from the records review.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-visual-indicators-of-contamination\">Visual Indicators of Contamination<\/h3>\n\n\n\n<p>Environmental professionals look for signs such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Surface staining on soil or pavement<\/li>\n\n\n\n<li>Stressed or dead vegetation<\/li>\n\n\n\n<li>Unusual chemical or petroleum odors<\/li>\n\n\n\n<li>Oily sheens or iridescence on water<\/li>\n\n\n\n<li>Corrosion or leaks from equipment<\/li>\n<\/ul>\n\n\n\n<p>These indicators can suggest the presence of hazardous substances or petroleum products.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-identifying-infrastructure-and-equipment\">Identifying Infrastructure and Equipment<\/h3>\n\n\n\n<p>The site visit also focuses on identifying features that indicate material use or storage, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fill pipes and vent pipes (indicating USTs)<\/li>\n\n\n\n<li>Aboveground storage tanks<\/li>\n\n\n\n<li>Drums and containers<\/li>\n\n\n\n<li>Waste storage areas<\/li>\n\n\n\n<li>Floor drains and sumps<\/li>\n<\/ul>\n\n\n\n<p>Even if tanks or equipment are no longer present, evidence of former systems (e.g., piping, depressions) can be critical.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-adjacent-properties\">Adjacent Properties<\/h3>\n\n\n\n<p>Reconnaissance is not limited to the subject site. Adjacent properties are also evaluated for potential off-site impacts, such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nearby gas stations<\/li>\n\n\n\n<li>Industrial operations<\/li>\n\n\n\n<li>Dry cleaning facilities<\/li>\n<\/ul>\n\n\n\n<p>Contamination can migrate across property boundaries, making this step essential.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-interviews-filling-the-information-gaps\">Interviews: Filling the Information Gaps<\/h2>\n\n\n\n<p>Interviews provide valuable context that may not be available in records or visible during site reconnaissance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-key-interviewees\">Key Interviewees<\/h3>\n\n\n\n<p>Environmental professionals typically interview:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Current property owners<\/li>\n\n\n\n<li>Site operators or facility managers<\/li>\n\n\n\n<li>Past owners or occupants (if available)<\/li>\n\n\n\n<li>Local government officials (e.g., fire department, building department)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-information-gathered\">Information Gathered<\/h3>\n\n\n\n<p>Interviews help uncover:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Historical site uses and operations<\/li>\n\n\n\n<li>Types of materials stored or used<\/li>\n\n\n\n<li>Storage practices and locations<\/li>\n\n\n\n<li>Known spills, leaks, or incidents<\/li>\n\n\n\n<li>Waste disposal practices<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-importance-of-interviews\">Importance of Interviews<\/h3>\n\n\n\n<p>Interviews can reveal:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Undocumented activities<\/li>\n\n\n\n<li>Informal practices not captured in records<\/li>\n\n\n\n<li>Institutional knowledge of site conditions<\/li>\n<\/ul>\n\n\n\n<p>This qualitative information is often critical in identifying RECs.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-storage-conditions-and-quantities\">Storage Conditions and Quantities<\/h2>\n\n\n\n<p>A key aspect of identifying hazardous substances and petroleum products is understanding how they are stored and managed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-storage-practices\">Storage Practices<\/h3>\n\n\n\n<p>Environmental professionals document:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Presence of storage vessels (drums, ASTs, USTs)<\/li>\n\n\n\n<li>Condition of containers (e.g., rust, leaks, labeling)<\/li>\n\n\n\n<li>Organization and housekeeping practices<\/li>\n<\/ul>\n\n\n\n<p>Improper storage\u2014such as open containers, lack of labeling, or visible leaks\u2014is a strong indicator of potential environmental risk.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-quantities-of-materials\">Quantities of Materials<\/h3>\n\n\n\n<p>While Phase I ESAs do not involve precise inventories, they assess the <strong>scale of materials present<\/strong>, such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A few small containers vs. numerous large drums<\/li>\n\n\n\n<li>Bulk storage tanks vs. minor quantities<\/li>\n<\/ul>\n\n\n\n<p>Larger quantities generally correspond to higher potential risk.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-secondary-containment\">Secondary Containment<\/h3>\n\n\n\n<p>The presence and condition of containment systems are evaluated, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Berms or dikes<\/li>\n\n\n\n<li>Concrete pads<\/li>\n\n\n\n<li>Spill containment pallets<\/li>\n<\/ul>\n\n\n\n<p>Proper containment reduces the likelihood of releases reaching soil or groundwater.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-why-storage-conditions-matter\">Why Storage Conditions Matter<\/h3>\n\n\n\n<p>Poor storage practices increase the risk of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Spills and leaks<\/li>\n\n\n\n<li>Chronic releases over time<\/li>\n\n\n\n<li>Environmental contamination<\/li>\n<\/ul>\n\n\n\n<p>These conditions often contribute to the identification of RECs.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-disposal-methods-evaluating-environmental-responsibility\">Disposal Methods: Evaluating Environmental Responsibility<\/h2>\n\n\n\n<p>Understanding how hazardous materials and petroleum products are disposed of is another critical component of a Phase I ESA.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-waste-management-records\">Waste Management Records<\/h3>\n\n\n\n<p>Environmental professionals review available documentation, such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Waste manifests<\/li>\n\n\n\n<li>Disposal receipts<\/li>\n\n\n\n<li>Regulatory filings<\/li>\n<\/ul>\n\n\n\n<p>These records help determine whether materials were handled and disposed of properly by licensed facilities.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-observed-disposal-practices\">Observed Disposal Practices<\/h3>\n\n\n\n<p>During site reconnaissance, the EP looks for signs of improper disposal, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Illegal dumping<\/li>\n\n\n\n<li>Buried debris or fill of unknown origin<\/li>\n\n\n\n<li>Stained soil in disposal areas<\/li>\n\n\n\n<li>Discharges to storm drains or surface water<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-historical-disposal-practices\">Historical Disposal Practices<\/h3>\n\n\n\n<p>Older properties may have used practices that were acceptable at the time but are now considered environmentally harmful, such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>On-site burial of waste<\/li>\n\n\n\n<li>Discharge to unlined pits or lagoons<\/li>\n\n\n\n<li>Use of fill materials from unknown sources<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-why-disposal-methods-matter\">Why Disposal Methods Matter<\/h3>\n\n\n\n<p>Improper disposal is a major source of environmental contamination and can lead to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Soil and groundwater impacts<\/li>\n\n\n\n<li>Regulatory liability<\/li>\n\n\n\n<li>Significant remediation costs<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-integrating-findings-to-identify-recs\">Integrating Findings to Identify RECs<\/h2>\n\n\n\n<p>The ultimate goal of identifying hazardous substances and petroleum products is to determine whether RECs are present.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-what-is-a-rec\">What is a REC?<\/h3>\n\n\n\n<p>A Recognized Environmental Condition is defined as:<\/p>\n\n\n\n<p><em>The presence or likely presence of hazardous substances or petroleum products due to a release, a past release, or a material threat of a release.<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-lines-of-evidence\">Lines of Evidence<\/h3>\n\n\n\n<p>Environmental professionals integrate multiple lines of evidence, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Historical records<\/li>\n\n\n\n<li>Regulatory data<\/li>\n\n\n\n<li>Visual observations<\/li>\n\n\n\n<li>Interview information<\/li>\n<\/ul>\n\n\n\n<p>A REC is typically identified when multiple indicators support the likelihood of contamination.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-types-of-environmental-conditions\">Types of Environmental Conditions<\/h3>\n\n\n\n<p>In addition to RECs, the assessment may identify:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Controlled RECs (CRECs):<\/strong> Contamination managed under regulatory controls<\/li>\n\n\n\n<li><strong>Historical RECs (HRECs):<\/strong> Past contamination that has been remediated to acceptable levels<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-limitations-of-the-identification-process\">Limitations of the Identification Process<\/h2>\n\n\n\n<p>While Phase I ESAs are highly effective, they have limitations:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No direct confirmation through sampling<\/li>\n\n\n\n<li>Reliance on available records and access<\/li>\n\n\n\n<li>Potential gaps in historical information<\/li>\n\n\n\n<li>Subjectivity in interpretation<\/li>\n<\/ul>\n\n\n\n<p>These limitations reinforce the importance of professional judgment.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-role-of-professional-judgment\">The Role of Professional Judgment<\/h2>\n\n\n\n<p>Identifying hazardous substances and petroleum products requires:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Experience with industrial and commercial operations<\/li>\n\n\n\n<li>Knowledge of contaminants and their behavior<\/li>\n\n\n\n<li>Understanding of regulatory frameworks<\/li>\n\n\n\n<li>Ability to synthesize diverse information sources<\/li>\n<\/ul>\n\n\n\n<p>Professional judgment is essential in determining whether conditions warrant further investigation.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-when-a-phase-ii-esa-is-recommended\">When a Phase II ESA is Recommended<\/h2>\n\n\n\n<p>If potential contamination is identified, a Phase II ESA may be recommended. This involves:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Soil and groundwater sampling<\/li>\n\n\n\n<li>Laboratory analysis<\/li>\n\n\n\n<li>Quantification of contaminants<\/li>\n<\/ul>\n\n\n\n<p>Phase II investigations provide the data needed to confirm and characterize environmental impacts.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\">Conclusion<\/h2>\n\n\n\n<p>Identifying hazardous substances and petroleum products in a Phase I Environmental Site Assessment is a comprehensive, multi-step process that relies on records review, site reconnaissance, and interviews. By evaluating storage conditions, quantities, and disposal methods, Environmental Professionals can assess the likelihood of contamination and identify Recognized Environmental Conditions.<\/p>\n\n\n\n<p>Although non-intrusive, the Phase I ESA provides critical insight into environmental risk, helping property owners, developers, and lenders make informed decisions. When conducted thoroughly and interpreted by experienced professionals, it serves as a powerful tool for managing environmental liability and protecting both human health and the environment.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\ud83d\udc49 <a href=\"https:\/\/www.gaeatech.com\/easr.php\">Learn more about our Automated Environmental Site Assessment Solution<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-related-articles\">Related Articles<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/phase-1-environmental-site-assessment-guide\/\">Overview of a Phase I Environmental Site Assessment (ESA): A Complete Guide for Due Diligence<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/phase-1-environmental-site-assessment-uses\/\">Key Uses of a Phase I Environmental Site Assessment<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/phase-1-environmental-site-assessment-market\/\">Market for Phase I Environmental Site Assessments<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/historical-source-review-phase-1-esa\/\">The Role of Historical Source Review in Phase I Environmental Site Assessments<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/environmental-database-review-phase-1-esa\/\">The Role of Environmental Database Reviews in Phase I Environmental Site Assessments<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/property-records-review-phase-1-esa\/\">The Review of Property Records in a Phase I Environmental Site Assessment<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/role-of-visual-inspections-phase-1-esa\/\">The Role of Visual Inspections in a Phase I Environmental Site Assessment<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/documenting-drainage-surface-water-phase-1-esa\/\">Documenting Drainage Patterns and Surface Water in a Phase I Environmental Site Assessment<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/role-of-photographs-phase-1-esa\/\">The Role of Photographs in Phase I Environmental Site Assessments<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/drones-phase-1-environmental-site-assessment\/\">The Use of Drones in a Phase I Environmental Site Assessment<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/phase-1-esa-interviews-property-owners-occupants\/\">Conducting Interviews with Property Owners and Occupants for a Phase I ESA<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/phase-1-esa-government-interviews\/\">Conducting Interviews with Government Officials for a Phase I ESA<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/phase-1-esa-neighbor-interviews\/\">Conducting Interviews with Neighbors for a Phase I ESA<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/phase-1-esa-conclusion-components\/\">Key Components of a Phase I ESA Conclusion<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/astm-e1527-21-vs-csa-z768-01\/\">Key Distinctions Between ASTM E1527-21 and CSA Z768-01<\/a><a href=\"https:\/\/gaeatech.com\/knowledge-center\/phase-1-esa-government-interviews\/\"><br><\/a><a href=\"https:\/\/gaeatech.com\/knowledge-center\/drones-phase-1-environmental-site-assessment\/\"><br><\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A Phase I Environmental Site Assessment (ESA) is a critical step in environmental due diligence, designed to identify potential environmental contamination liabilities associated with a property. Conducted in accordance with ASTM E1527-21, the Phase I ESA focuses on determining the presence or likely presence of hazardous substances and petroleum products through a structured, non-intrusive process. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":91881,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[27,1358],"tags":[1415,1413,1412,1414],"class_list":["post-91880","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environmental-engineering","category-environmental-site-assessments","tag-contaminated-site-assessment","tag-petroleum-products-environmental-assessment","tag-phase-i-esa-hazardous-substances","tag-rec-identification-esa"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Identifying Hazardous Substances and Petroleum Products Steps - Knowledge Center<\/title>\n<meta name=\"description\" content=\"Learn how to identify hazardous substances and petroleum products in a Phase I ESA to assess environmental liabilities properly.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Identifying Hazardous Substances and Petroleum Products in a Phase I Environmental Site Assessment\" \/>\n<meta property=\"og:description\" content=\"Learn how to identify hazardous substances and petroleum products in a Phase I ESA to assess environmental liabilities properly.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/\" \/>\n<meta property=\"og:site_name\" content=\"Knowledge Center\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.linkedin.com\/company\/2663277\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-01T01:05:57+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-05T01:47:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1536\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"GAEA Technologies\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"GAEA Technologies\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/\"},\"author\":{\"name\":\"GAEA Technologies\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/person\\\/940fb5fed6e95dd9d0ec1370207f5dba\"},\"headline\":\"Identifying Hazardous Substances and Petroleum Products in a Phase I Environmental Site Assessment\",\"datePublished\":\"2026-04-01T01:05:57+00:00\",\"dateModified\":\"2026-04-05T01:47:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/\"},\"wordCount\":1693,\"commentCount\":9,\"publisher\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg\",\"keywords\":[\"contaminated site assessment\",\"petroleum products environmental assessment\",\"Phase I ESA hazardous substances\",\"REC identification ESA\"],\"articleSection\":[\"Environmental Site Assessment Automation\",\"Environmental Site Assessments\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/\",\"name\":\"Identifying Hazardous Substances and Petroleum Products Steps - Knowledge Center\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg\",\"datePublished\":\"2026-04-01T01:05:57+00:00\",\"dateModified\":\"2026-04-05T01:47:12+00:00\",\"description\":\"Learn how to identify hazardous substances and petroleum products in a Phase I ESA to assess environmental liabilities properly.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/#primaryimage\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg\",\"contentUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg\",\"width\":1536,\"height\":1024,\"caption\":\"Environmental site assessment highlighting inspection of storage tanks, records review, and identification of contamination risks\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/identifying-hazardous-substances-petroleum-phase-1-esa\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Identifying Hazardous Substances and Petroleum Products in a Phase I Environmental Site Assessment\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#website\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/\",\"name\":\"GAEA Technologies Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#organization\",\"name\":\"GAEA Technologies\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Gaea_3dlogo_white-scaled.jpg\",\"contentUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Gaea_3dlogo_white-scaled.jpg\",\"width\":2560,\"height\":1440,\"caption\":\"GAEA Technologies\"},\"image\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/2663277\\\/\"],\"description\":\"GAEA Technologies develops and distributes geoscience and engineering solutions worldwide. Our solutions have been used for over 30 years by companies and organizations around the world.\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/person\\\/940fb5fed6e95dd9d0ec1370207f5dba\",\"name\":\"GAEA Technologies\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g\",\"caption\":\"GAEA Technologies\"},\"sameAs\":[\"https:\\\/\\\/gaeatech.com\\\/wordpress\"],\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/author\\\/mfraser\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Identifying Hazardous Substances and Petroleum Products Steps - Knowledge Center","description":"Learn how to identify hazardous substances and petroleum products in a Phase I ESA to assess environmental liabilities properly.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/","og_locale":"en_US","og_type":"article","og_title":"Identifying Hazardous Substances and Petroleum Products in a Phase I Environmental Site Assessment","og_description":"Learn how to identify hazardous substances and petroleum products in a Phase I ESA to assess environmental liabilities properly.","og_url":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/","og_site_name":"Knowledge Center","article_publisher":"https:\/\/www.linkedin.com\/company\/2663277\/","article_published_time":"2026-04-01T01:05:57+00:00","article_modified_time":"2026-04-05T01:47:12+00:00","og_image":[{"width":1536,"height":1024,"url":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg","type":"image\/jpeg"}],"author":"GAEA Technologies","twitter_card":"summary_large_image","twitter_misc":{"Written by":"GAEA Technologies","Est. reading time":"8 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/#article","isPartOf":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/"},"author":{"name":"GAEA Technologies","@id":"https:\/\/gaeatech.com\/knowledge-center\/#\/schema\/person\/940fb5fed6e95dd9d0ec1370207f5dba"},"headline":"Identifying Hazardous Substances and Petroleum Products in a Phase I Environmental Site Assessment","datePublished":"2026-04-01T01:05:57+00:00","dateModified":"2026-04-05T01:47:12+00:00","mainEntityOfPage":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/"},"wordCount":1693,"commentCount":9,"publisher":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/#organization"},"image":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/#primaryimage"},"thumbnailUrl":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg","keywords":["contaminated site assessment","petroleum products environmental assessment","Phase I ESA hazardous substances","REC identification ESA"],"articleSection":["Environmental Site Assessment Automation","Environmental Site Assessments"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/","url":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/","name":"Identifying Hazardous Substances and Petroleum Products Steps - Knowledge Center","isPartOf":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/#website"},"primaryImageOfPage":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/#primaryimage"},"image":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/#primaryimage"},"thumbnailUrl":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg","datePublished":"2026-04-01T01:05:57+00:00","dateModified":"2026-04-05T01:47:12+00:00","description":"Learn how to identify hazardous substances and petroleum products in a Phase I ESA to assess environmental liabilities properly.","breadcrumb":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/#primaryimage","url":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg","contentUrl":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg","width":1536,"height":1024,"caption":"Environmental site assessment highlighting inspection of storage tanks, records review, and identification of contamination risks"},{"@type":"BreadcrumbList","@id":"https:\/\/gaeatech.com\/knowledge-center\/identifying-hazardous-substances-petroleum-phase-1-esa\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/gaeatech.com\/knowledge-center\/"},{"@type":"ListItem","position":2,"name":"Identifying Hazardous Substances and Petroleum Products in a Phase I Environmental Site Assessment"}]},{"@type":"WebSite","@id":"https:\/\/gaeatech.com\/knowledge-center\/#website","url":"https:\/\/gaeatech.com\/knowledge-center\/","name":"GAEA Technologies Blog","description":"","publisher":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/gaeatech.com\/knowledge-center\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/gaeatech.com\/knowledge-center\/#organization","name":"GAEA Technologies","url":"https:\/\/gaeatech.com\/knowledge-center\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/gaeatech.com\/knowledge-center\/#\/schema\/logo\/image\/","url":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2025\/12\/Gaea_3dlogo_white-scaled.jpg","contentUrl":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2025\/12\/Gaea_3dlogo_white-scaled.jpg","width":2560,"height":1440,"caption":"GAEA Technologies"},"image":{"@id":"https:\/\/gaeatech.com\/knowledge-center\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/2663277\/"],"description":"GAEA Technologies develops and distributes geoscience and engineering solutions worldwide. Our solutions have been used for over 30 years by companies and organizations around the world."},{"@type":"Person","@id":"https:\/\/gaeatech.com\/knowledge-center\/#\/schema\/person\/940fb5fed6e95dd9d0ec1370207f5dba","name":"GAEA Technologies","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/cdc2b26dbe02c637b6e6ae5e99ff7928c8d2c7fb325dffb8da7e8b0af95dcbd7?s=96&d=mm&r=g","caption":"GAEA Technologies"},"sameAs":["https:\/\/gaeatech.com\/wordpress"],"url":"https:\/\/gaeatech.com\/knowledge-center\/author\/mfraser\/"}]}},"jetpack_featured_media_url":"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/identifying-hazardous-substances-petroleum-phase-1-esa.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/posts\/91880","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/comments?post=91880"}],"version-history":[{"count":2,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/posts\/91880\/revisions"}],"predecessor-version":[{"id":91991,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/posts\/91880\/revisions\/91991"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/media\/91881"}],"wp:attachment":[{"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/media?parent=91880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/categories?post=91880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaeatech.com\/knowledge-center\/wp-json\/wp\/v2\/tags?post=91880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}