| During plugging and abandonment activities of the Williams #18-29 and Williams #36-20 wellheads at the Williams Pad 29-2N-68W site, ten shallow soil vapor points were installed in the vicinity of the wellheads (attached). On July 12, 2021, methane was detected at SVP01 (11.2%), SVP04 (0.4%), SVP05 (0.6%), and SVP09 (0.8%). The volume of the methane release is unknown. WSP collected samples from SVP01, SVP04, SVP05, and SVP09 using IsoTubes™ and an IsoTube™ sampling manifold in conjunction with the pump on a GEM 5000. The samples were submitted to Dolan Integration Group (DIG) for gas composition analysis. Results from the gas composition analysis were received from DIG on July 15, 2021 and are attached. An investigation into the nature and source of the soil gas is on-going. The assessment details will be summarized in a supplemental report. The topographic Site Location Map showing the geographic setting of the release is provided as Figure 1. |