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MCI S F A M I L Y V I N E Y A R D S May 5,2003 MAY 0 9 2003 Mr.Tim O'Brien ENVIRONMENT HEALTH California Water Quality Control Board PERMIT/SERVICES 3443 Routier Road,Suite A Sacramento,CA 95827-3003 Dear Tim: To address the issues raised in the April 4,2003 correspondence from Wendy Wyels,we propose the following: 1. Commission a technical study to determine the sources of additional TDS in the winery process. To this end we have contacted Glenn Dombeck,P.E.,and will commence a Salinity Reduction Study before the fifteenth of this month. The objective of the study will be to determine the most efficient and effective means to reduce additions of TDS to the winery waste stream. The study will involve sampling and analysis of the winery liquid process waste to determine a salt balance for the winery. Further,the study will propose means by which the winery can reduce its contribution of TDS to the waste stream or methods to optimize salt management. The time frame for completing this study is 120 days. This timeframe will allow for an accurate characterization of TDS-generating activities at the winery. 2. Upon completion of the study,McManis Family Vineyards will select and evaluate the TDS reduction alternatives for their feasibility. Upon prioritizing the alternatives,we will implement those most likely to have the most efficient effect on reducing process water TDS. Time frame for the implementation of the chosen alternatives would be 90 days after receipt of the study. This timeframe will allow adequate time for implementation of the selected alternatives within the context of upcoming harvest activities. McManis Family Vineyards will continue to sample the winery effluent on a monthly basis prior to its discharge to the treatment ponds. Given the proposed changes to reduce the TDS of the effluent,we wish that a deter .inatio::to classify the,inery::,ante as `devignated waste' be dela,ed. ntil+he f rs±,:tarter cf 2004. It is interesting to note that the average TDS for the nineteen months prior to the installation of a water softener averaged 2,100 mg/L and for the sixteen months since the softener was installed in November 2001 the TDS in the winery effluent has averaged 4,100 mg/L. Consequently,alternative approaches to j� IZ 1 PON,CA 95 366 TELEPI-ION 1: 209 599-1186,c-FAX 209 .. ¢+ •