Environmental Site Assessment (ESA) services in Denver & Lakewood
Phase I/II reporting, risk analysis & sampling tailored to commercial & redevelopment needs.
Environmental Site Assessment
Schafer’s Phase I environmental site assessments (ESAs) begin with collecting property information, researching historical records, and conducting onsite reconnaissance and interviews to identify any recognized environmental conditions (RECs). All past and present site uses are evaluated and used to develop a detailed report with findings, diagrams, photos, and environmental professional (EP) recommendations. For Phase II ESAs, Schafer develops a site-specific sampling and analysis plan based on Phase I findings and potential contamination pathways. Soil and groundwater samples are collected—often using subcontracted drillers—and screened onsite before being sent to accredited laboratories for analysis. Results are compared to applicable regulatory limits and are used to determine remediation options if necessary.
Environmental Site Assessment Phase I
Schafer begins the environmental site assessment (ESA) process by gathering information from the client about the subject property, current land use, and future intentions with the subject property. Schafer concurrently performs independent historical property records research to identify possible environmental conditions on and around the subject property. Information obtained is used to further investigate the subject property during the site reconnaissance. Site reconnaissance is performed by Schafer’s experienced staff professionals to determine the possibility and sources of potential contamination risks. While onsite, Schafer performs interviews with the key site manager to obtain first-hand information about current land uses.
All historical uses, current uses, and field observations are then evaluated to determine historical and future contamination risks. The evaluation process allows Schafer to deliver accurate findings for the subject property and determine if any recognized environmental conditions (RECs) are identified. Following the determination by Schafer’s environmental professional, a report is generated by experienced staff professionals within four weeks. The report includes historical diagrams, documents, computer generated figures, field observations, photographs, interview responses, and final conclusions and recommendations for the subject property.
Environmental Site Assessment Phase II
Schafer will use previous Phase I reports and other records to determine if RECs and possible pathways of contamination are potentially present on the subject property. Schafer will develop a sampling and analysis plan (SAP) specific to the source of contamination and the subject property in accordance with applicable standards. Sampling procedures will be consistent with the established SAP. Schafer typically subcontracts a drilling company to perform borings utilizing auger or direct push specific to the purpose of the Phase II investigation and sampling. Schafer performs investigation and sampling of the soil cores and groundwater during drilling operations. Schafer will also perform onsite soil screening utilizing a photoionization detector (PID) instrument to collect Volatile Organic Compounds (VOCs) measurement of soil onsite. Schafer will take thorough notes and photographs to ensure compliance with the project needs and relevant standards. Schafer will diligently collect and submit samples to an accredited laboratory for analysis. Schafer partners with accredited laboratories in the greater Denver area to ensure efficient and accurate results. Upon receiving analytical data, Schafer will review and compare the results to corresponding regulatory limits. Schafer will verbally notify the client of analytical findings and complete a written report within five business days. The report will include tables, photographs, diagrams, a detailed summary of sampling events, and recommendations.