An international energy company contracted GZA to conduct ASTM 1527-13-compliant Phase I Environmental Site Assessments (ESAs) at 20 unconventional gas facilities spread across 63,000 acres in several counties in Pennsylvania. These sites included horizontal gas wells, impoundments, compressors, and storage tanks. The client required a three-week reporting turnaround.


GZA developed a secure online mapping and database application to provide the client with real time updates and status reports for each facility. This allowed for efficient planning, continuous assessment of recognized environmental conditions, and aided in meeting the deliverable deadline. Each facility was placed on the map; photographs, observations, and site-specific documents were uploaded to the database as they were acquired. This allowed the client and project manager to click on each facility and bring up all the pertinent information in as near real time as possible. The State of Pennsylvania had extensive records available for review for these facilities; as GZA conducted file reviews, pertinent documents were recorded and also uploaded to the comprehensive, online database. While the sites were generally located in agricultural areas and did not have complex development or environmental histories, GZA’s application of the ASTM 1527-13 standard identified recognized environmental conditions not typically associated with rural properties.


The final Phase I ESA report totaled more than 3,800 pages and was delivered to the client on time, meeting a very aggressive schedule. The customized online database application that GZA developed allowed the client to assess conditions in near real time as the site assessments progressed.