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. '� 'L. _ .:rya x ' — •A Y,,y, a� r-Y i Memorandum SATE OF CALiFORN�A REGIONAL WATER QUALITY CONTROL BOARD o CENTRAL VALLEY REGION 3443 Routier Raid Sacramento,Celifornia 9582? -3098 Phone: 916/361-5600 To: Regulatory Staff FROM: Gordon Le oggs Undergro Tank Progra oordinator DATE: 24 March 19$7 sl(3NATURE: SUBJECT: CONSULTANT REPORTS FOR ASSESSIN GROUND WATER PROBLEMS AT SITES UNDERGROUND STORAGE TANKSN(LUSZ s)T D BY LEAKING In the course of our work we may review several proposals submitted by consultants on behalf of an underground tank owner to either initiate work to determine if a problem exists or, if one is found, the extent and appropriate remedial actions needed to alleviate the problem. Often we find that a report format has emitted essential information or the information has not been prepared in a manner that allows the ,ocal implementing agency (L1A) or us to review the proposal expeditiously. Such delays are neither cost effective for us or the tank owner. The problem is not necessarily one of the consultants' but a collective result of us all trying to accomplish a monumental task of permitting and cleaning t up sites in a constricted time schedule. Our process should be one which would help minimize downtime for the tank owner. To facilitate and streamline our operations for providing tank owners and their consultants with our requirements for determining the significance of a tank system leak, a consistent reporting procedure is indtcated. When ground water nas been shown to be contaminated as a result of a tank leak, it would seem that three {3 reports should be sufficient to describe the problem ano suggest r_medial actions that would mitigate or eliminate the problem: 1. A ft-diminary Ronpat to assess the site and problem with suggessted borenoles and monitor wells needed to determine site status; 2. A h e Aja,-ag hent. RP (rt to describe the lateral and vertical extent