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Escalon Cellars TL F06601.01 <br /> February 9, 2000 Page 3 <br /> 3.0 ANALYTICAL RESULTS OF RECENT SAMPLING EVENT <br /> As discussed with Ms. Wendy Wyels of the CVRWQCB in a meeting with representatives of <br /> Canandaigua Winery and Twining Labs, Twining and Canandaigua proposed to sample the four <br /> production wells at the site and the east,west and cooling water samples for volatile organics using <br /> EPA Methods 601 and 8260. Twining personnel sampled these wells and sumps on January 12, <br /> 2000. The wells and sumps were sampled using Twining standard protocols which are included in <br /> Appendix A. Each well was allowed to run for 15 to 20 minutes prior to sampling with the <br /> exception of Well No. 2 This well is powered by a diesel engine and is a standby source of water <br /> in case of power failures. This well was started and allowed to run for 40 minutes before sampling. <br /> The sumps were sampled using pre-cleaned disposable bailers. Each water sample was collected in <br /> laboratory-prepared sampling containers and placed in an ice chest after collection of the sample. <br /> The samples were delivered to Twining Laboratories,Inc.,a State of California certified laboratory <br /> under chain of custody for laboratory analysis. The analytical results for the samples are <br /> summarized in Table 1. <br /> TABLE 1 <br /> SUMMARY OF PURGEABLE HALOCARBONS <br /> Analyzed using EPA Method 601 <br /> Sampled on January 12, 2000 <br /> Sampling Chloroform Bromoform Freon 11 Dichlorodifluoromethane <br /> Point ug/1 ug/1 ug/1 Freon 12 <br /> Well No. 1 <0.5 <0.5 <0.5 <1.0 <br /> Well No. 2 <0.5 <0.5 <0.5 <1.0 <br /> Well No. 3 0.58 <0.5 <0.5 1.3 <br /> Well No. 4 <0.5 <0.5 <0.5 <1.0 <br /> East Sump 4.4 0.54 <0.5 <1.0 <br /> West Sump 4.7 <0.5 <0.5 <1.0 <br /> Clear Water 0.51 1.1 <0.5 <1.0 <br /> Sum <br /> No Freon 11 has been detected in the last two sampling events of the production wells. <br /> Dichlorodifluoromethane was detected in well three at just above the detection limit for that <br /> constituent. No dichlorodifluoromethane has been detected in any of the production wells in <br /> previous sampling events. Chloroform has been detected historically in the east and west cooling <br /> water sumps and was detected in the east and clear water sumps in the samples collected in January, <br /> 2000. Canandaigua is required to chlorinate ground water pumped from their production wells. It <br /> is Twining's experience that when chlorinated water comes into contact with organic and or plant <br />