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E2 SOIL GAS WELL SAMPLING INTERVALS NORTH COUNTY RECYCLING CENTER AND SANITARY LANDFILL Note: 1 Design refuse base Elev: 54 feet NAVD 88 (Near sump of Module 3) 2 All elevations based on North American Vertical Datum 88 3 Sampling interval elevations of proposed wells are approximate and may change during well installation Well No Well Location Existing Grade Elev Well Bottom Elev Shallow Probe Intermediate Probe Deep Probe Sampling Interval Elev Sampling Interval Elev Half -Depth of Refuse Elev Sampling Interval Elev Bottom of Refuse Elev SG -1 114 53 109.5 to 92.5 91 to 74 84 72 to 53 54 SG -2 114 51 109.5 to 92.5 91 to 74 84 72 to 51 54 SG -3 109 45 104.1 to 96 94 to 86 82 84 to 45 54 SG -8 117 57 112 to 95 93 to 76 85 74 to 57 54 SG -9 113 53 105.5 to 99.8 94 to 84 84 82 to 53 54 SG -10 112 52 104.8 to 90.8 89 to 73 83 71 to 52 54 SG -11 109 34 103 to 99 94 to 62 82 67 to 34 54 SG -12 109 34 103 to 99 94 to 62 82 67 to 34 54 SG -13 109 34 103 to 99 94 to 62 82 67 to 34 54 SG -14 121 34 114 to 111 106 to 67 87 72 to 34 54 SG -15 119 34 113 to 109 104 to 67 87 72 to 34 54 SG -16 114 34 108 to 104 99 to 64 84 69 to 34 54 SG -17 114 34 108 to 104 99 to 64 84 69 to 34 54 SG -18 117 34 111 to 107 102 to 66 86 71 to 34 54 SG -19 119 34 113 to 109 104 to 67 87 72 to 34 54 SG -20 119 34 113 to 109 104 to 67 87 72 to 34 54 SG -21 110 34 104 to 100 95 to 62 82 67 to 34 54 SG -22 112 34 106 to 102 97 to 63 83 68 to 34 54 Landfill Gas Monitoring Plan San Joaquin County N:\1 North County\Gas Monitoring\GasMonitPlanNforms\NC-SG Well Sampling Intv.xls Public Works /Solid Waste L