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MEMORANDUM <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD - CENTRAL VALLEY REGION <br /> 3443 Roder Road Phone: (916) 361-5600 <br /> Sacramento, CA 95827-3098 ATSS Phone: 8-495-5600 <br /> TO: Ton Vorster �" / FROM: Twila Leclerc <br /> Senior Engineer Area Engineer <br /> DATE: 24 July 1989 SIGNATURE: J/j� b o , ikz <br /> SUBJECT: Dole Fresh Fruit/Victor Fruit Ground Water Monitoring Proposal <br /> I have reviewed the report, "Technical Report Relating to Updating of Waste Discharge <br /> Requirements for Dole Fresh Fruit Company, Victor Fruit, " dated 30 June 1989, prepared by <br /> Tenera Environmental Services, and have the following comments: <br /> 1. The monthly total dissolved solids (TDS) levels from 1983 to 1988 range from 185 mg/l <br /> to 33,700 mg/l . Why are the levels so varied? Weekly TDS sampling should be <br /> correlated with weekly specific conductivity sampling for verification of the data. <br /> TDS source control should be pursued. <br /> 2. Table 2-3, B. , shows quarterly TDS levels from 1983 to 1988 in "on-site wells." For <br /> this data to be of any use, Dole needs to show the screen depths of these wells and <br /> where they are located. Samples from shallow wells will indicate TDS contamination <br /> of the shallow aquifer more accurately than deep wells. Dole also needs to show the <br /> "true" background TDS levels in the shallow ground water, which, again, can only be <br /> determined by using a shallow background well with known construction data. <br /> 3. How will the potential for downward migration of high TDS level discharges to ground <br /> water be reduced by irrigating the vineyards during the dry weather season? <br /> 4. More information is needed on the vineyard irrigation, such as where they are located, <br /> when they are irrigated, the quantity of wastewater used, and what, if any, dilution <br /> of the wastewater was used for irrigation. <br /> 5. Dole's response to our ground water monitoring request was to monitor four existing <br /> wells in the vicinity of the discharge. We need the following information to evaluate <br /> this proposal : <br /> a. Depth and well specifications for all existing wells (including production wells) <br /> b. Depth to ground water <br /> C. Ground water level data and direction of ground water <br /> d. Site map to scale showing locations of all wells, the percolation checks, and <br /> the vineyard <br />