Specifications include, but are not limited to: 3.1.1.1 For purposes of investigating the presence/absence of oil and gas wastes and, as applicable, the extent and degree of pollution caused by the oil and gas wastes, Vendor may be required to collect environmental samples during soil excavation or other Site Remediation Services. 3.1.1.2 Using the most appropriate techniques of site cleanup and remediation to accomplish the objectives and goals specified within the Work Order, and as approved by RRC prior to initiating performance, Vendor shall remediate soil, sediment, and groundwater impacted by oil and gas waste. Site cleanup and remediation techniques may include but are not limited to: a. Offsite disposal: e.g., “dig and haul”; vacuum extraction, pumping, separation, haul off site, and dispose at disposal facilities permitted and/or otherwise authorized to receive oil and gas wastes; and b. Onsite disposal: only when expressly authorized by RRC; e.g., ex-situ or in-situ biotreatment; ex-situ or in-situ physical/chemical treatment; recycling; and, stabilization and capping/reseeding.