I believe I have found the exact location of OMC 5. 17916 Fraser Hwy, a 36 acre property in the south east corner of the Fraser Hwy and 176th intersection.
It is currently not part of the ARL (I believe it was formerly) and is listed as being owned by a crown agency on the ARL GIS map.
It was sold in November last year for $8 million. That is a low low price compared to Translink's previous estimate of $150M for land acquisition, it's very clear now why the Province took over the project.
Image from Provincial Agricultural Land Commission