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CITY OF SANTA ANA Well No. 32 Nitrate Mitigation and Rehabilitation Study 2. WELL INFORMATION 2.1 Well Description Well No. 32 is located near the entrance to Morrison Park, approximately 45 feet east of Westwood and 200 feet south of Corrigan Street, as depicted in Figure 1. The well was drilled in 1984 to a depth of approximately 1,060 feet below ground surface (bgs). The total length of screened interval is 290 feet. The static water level is at 116 feet and the pumped level is at 228 feet below ground. The reported well yield is approximately 2,127 gpm as measured in 2001. The well is equipped with a vertical turbine pump rated for a capacity of 2,700 gpm with a 300 hp motor. The manufacturer and model number of the pump is Vertiline, V85- 70529. Well No. 32 operated for a period of time and has been out of service since 2004. Well No. 32 Location Map 2.2 Water Quality Data Based on a review of the City's historical water quality data (from 2002 through 2004) for Well No. 32, the nitrate levels varied from about 15 mg/L to 37 mg /L, with an average of 23 mg /L. On November 1, 2012, the City performed a 12 hour water quality sampling test to measure the nitrate levels in the well water as a function of pumping time. Samples were collected for the following time periods: 5, 10, 15, 30 minutes, and then 1, 2, 3, 6, 9 and 12 hour points. While it was expected for the nitrate levels to decrease over time, the test results indicated that the nitrate level remained relatively consistent at about 43 mg/L for the duration of the test. P:N00597\006 T,in¢¢ting\t15\ Welld2- Nllm[e- M1Ngn[lon\Dre9 Repotl \021axtdoq� I _ � TETRA TECH