. >> we didn't hire at th tetra tr one. for two, there is an independent body that verifies the materials that come off the site. during grading, we done multiple borings on the site already. that's how we know what's there. the question now becomes during construction, how do we identify and mitigate it in we need to. we are beholden to the state of california in terms of testing and mitigation. >> we do have plenty of mitigation measures in this draft. aside from the cleanup that's happening on the rec park, we have measures for any construction during the construction and before obtaining a site permit for development activities involving subsurface disturbance. the project sponsors have to comply with the requirements of the department of public health, health code article 22a by causing a qualified person to prepare and submit a site mitigation plan to d.p.h. for review and approval. we have menu of items, mitigation measure, mhv2a. we have put bullet point list of things that can go into that site mitigation plans. it