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' 90b kal Tec/ucics 1947. Page 9 �i g ' Groundwater Monitoring Report Project No 425 2 January 31,2006 ' o All Zone A wells were non were non-detect above laboratory reporting limits for EDB tZone B: • Laboratory results are summarized in Table 8 ' • MW-2X, MW-101 and MW-105 were non-detect above laboratory reporting limits for all analyzed constituents • Trace levels of MtBE and 1,2-DCA were detected in MW-106, the well was non- detect above laboratory reporting limits for all other analyzed constituents ' Zone C & Zone D: • Laboratory results are summarized in Table 9 • MW-102, MW-107, MW-201 and MW-202 were non-detect above laboratory ' reporting limits for all analyzed constituents Domestics Wells: ' • Laboratory results are summarized in Table 10 • Three domestic wells (1697 Durham Ferry, 1600 `A' Durham Ferry and 31448 Hwy 33) were tested and found non-detect above laboratory reporting limits for all analyzed constituents Additional Tested Parameters--Table 11: ' Zone A • Dissolved Oxygen (DO) measurements taken in Zone A ranged between 0 10 (MW-2) and 2 37 ppm (MW-5) ' • DO levels above 1 ppm are conducive to aerobic biodegradation • Oxidation-Reduction Potential (ORP) measurements were positive in all the Zone A monitoring wells except MW-2 (-52mV) • Electric Conductivity (EC) measurements taken in Zone A ranged between 1,228 (MW-1) and 2,427(Dmhos/cm (MW-6) ' • pH measurements taken in Zone A ranged between 6 88 (MW-2) and 7 69 (MW-1) • The average groundwater temperature in Zone A was 73 2°F ' Zone B • Dissolved Oxygen (DO) measurements taken in Zone B ranged between 162 (MW- 106) and 2 45 ppm (MW-2X) ' + DO levels above 1 ppm are conducive to aerobic biodegradation • Oxidation-Reduction Potential (ORP) measurements were positive in all the Zone B monitoring wells ' • Electric Conductivity (EC) measurements taken in Zone B ranged between 1,626 (MW-101) and 1,807 (Dmhos/cm (MW-106)