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Suit Suitahititt&rheme Lmding Studs page Propowd Swma Winery. 17521 D,w Rut.Lodi CA Protea No, 6704B Juth,22...-101.3 4.0 GROUNDWATER RESOLRCES 4.1 Depth and Flow of Groundwater According to the maps contained in the San Joaquin County Flood Control and Water Conservation District report entitled "SuPing 2003 Grounduaaer Reyori'. (Appendix B) the depth to first groundwater in this area lies at a depth of about 20 feet below ground level (-10 Ft above MSL) and flows southeast toward Lodi Seasonal variation in the depth to water in the area is typicalIN in the range of several feet The direction of flow may fluctuate. but will generally return in a southeasterlv direction It should be noted, however. that the actual depth to water measured In the on-site water well was 39 feet. 4.2 Known and Potential Groundwater Contamination There are many possible sources of groundwater contamination including leaking storage tanks. surface releases of hazardous materials, over-use of agricultural chemicals. leakage from dairy lagoons. and septic sewage seepage A detailed investigation of potential groundwater contamination was beyond the scope of this investigation however, the State A Board's "GeoIracket ' website http ,Peotracket swrcb ca vo% was searched to help identify possible sources of nearby groundwater contamination. No such sites were identified within one mile or the site. No nearby dairy lagoons or other common potential sources of contamination were noted in the air photo either Nitrate from waste disposal must be considered as possible sources of groundwater contamination at this site In this case. no up-gradient residential septic systems within t4 mile appear to be present although several lie in the cross-gradient position. 4.3 Water Well Sampling and Analysis One recently drilled water well is present onsite. Geo-Phase Environmental, Inc. sampled the well on April 24, 2013. The well was recently drilled and has not vet been equipped with a pump. electrical service or other production equipment. The well was opened and an electrically actuated sounding device was used to determine the depth to standing groundwater The depth to water was found to be 39 feet. Since the well could not be pumped, a disposable bailer was lowered into the well to collect the sample. The water was collected directly into a ]-liter amber glass lar and 40-ml VOA phials The sample was immediately sealed, labeled .end placed in a cooler chilled to 4 degrees C The sample was then transported to Argon Laboratories, a State certified analytical laboratory in Ceres. CA under chain-of-custody protocol. The chain-of-custody and laboratory data sheets are attached as Appendix D The sample was tested for die presence of the agricultural fumigant 1.2-dibromo-3-chloropropane (D-BCP), and for total nitrate. Hie water well sample did not contain detectable concentrations of DBCP or nitrate. The total nitrate concentration allowable for drinking water is 45 mg L 2937 Venemmt Aue.,J R2a1 Ge Phaw Emirtmmental In, H.m. (2u9�>roi-u2v3 Maderw.CA 95356 f as- -'(N)