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I California )gional Water Quality Co�� `rol Board " Central Valley Region 0 Katherine Hart, Chair O' 11020 Sun Center Drive,#200, Rancho Cordova, California 95670-6114 Linda S.Adams (916)464-3291 • FAX(916)464-4645 Edmund G.Brown Jr. Acting Secretary for http://www.waterboards.ca.govlcentralvalleyor rvironmental Protection ICE 23 May 2011 MAY S 6 2011 ENVIRONMENTAL HEALTH Ben Hall Horacio Ferriz, Ph.D DEPARTMENT Musco Family Olive Company California State University Stanislaus 17950 Via Nicolo 801 West Monte Vista Avenue Tracy, CA 95376 Turlock, CA 95382 ADDITIONAL INFORMATION REGARDING TESTING OF THE CLASS 11 SURFACE IMPOUNDMENTS, MUSCO FAMILY OLIVE COMPANY, SAN JOAQUIN COUNTY Staff would like to thank Musco for joining last week's conference call to discuss the liner leak detection test, the leachate collection recovery system (LCRS) test, and the well installation report dated 4 April 2011. This letter is intended to respond to certain questions that came up during the call and to clarify what is needed to satisfy Waste Discharge Requirements (WDRs) Order R5-2005-0024. Two distinct tests need to be conducted on the Class II Surface Impoundments for the purpose of verifying whether the primary hypalon liner is leaking and to confirm whether the LCRS is functioning as designed. During the conference call, Musco asked for information regarding companies with experience in conducting primary liner leak detection tests. While there may be other local engineering firms that can do this work, staff is aware that the test can be conducted by Leak Locations Services, Inc. (LLSI), of San Antonio, Texas. Staff has discussed the general parameters with LLSI and verified that the leak detection test can be conducted with water in the surface impoundments. Part of the leak detection test shall include physical testing of the hypalon liner, which will help evaluate the life span of the hypalon liner. While we are not recommending one company over another, we are providing this information in response to your questions. The contact information for LLSI is in the attachment to this letter. The WDRs also require that the LCRS be tested for functionality. As promised during the call, staff has found numerous other dischargers who have completed this test. You may wish to contact the facilities listed on the attachment to this letter. In addition, you may wish to contact the engineering firm which designed Musco's Class II Surface Impoundments, Kjeldson, Sinnock, and Neudec. Staff has spoken to this firm, and they are available to discuss testing of the LCRS. Finally, we understand that Musco has requested an extension to submit the work plan. This letter grants an extension to 30 June 2011. The work plan shall contain a proposal and time schedule to conduct (1) an electronic leak detection test of the primary liner and (2) a functionality test of the LCRS. The schedule shall show that both tests will be completed by 30 September 2011, and that a report of results will be submitted by 30 October 2011. The California Environmental Protection Agency 1 IRP cycled Paper