Environmental Site Assessments EnRisk's assessments are guided by currently accepted national standards for ESAs. Confidentiality is always assured. Petroleum Storage Tank RemovalsEnRisk can arrange removal of your above or below ground storage tank and any associated dispensing system. Leaking Petroleum Storage Tank ServicesEnRisk's staff includes two Texas licensed Professional Geologists (P.G.), with cumulative experience of about 30 years with Leaking Petroleum Storage Tank (LPST) projects. Environmental RemediationWhen environmental assessment or other circumstances has resulted in a need for remediation EnRisk professionals can initiate and provide coordination and management.