| MONTEREY PENINSULA WATER MANAGEMENT DISTRICT | |||||||||||||||||
| GROUND WATER QUALITY MONITORING RESULTS | |||||||||||||||||
| Carmel Valley Aquifer Sample Collection Date: November 15 and November 18, 2004 | |||||||||||||||||
| Seaside Basin Sample Collection Date: November 8 and November 9, 2004 | |||||||||||||||||
| Units are milligrams per liter unless otherwise noted. | |||||||||||||||||
| Water Quality Constituent | Specific Conductance (micromhos/cm) | Total Alkalinity (as CACO3) | pH | Chloride | Sulfate | Ammonia Nitrogen (as NH3) | Nitrate Nitrogen (as NO3) | Total Organic Carbon | Calcium | Sodium | Magnesium | Potassium | Iron | Manganese | Orthophosphate | Boron | |
| Drinking Water Standard (1) | 900 1600 2200 (2) | NA | NA | 250 500 600 (2) | 250 500 600 (2) | NA | 45 | NA | NA | NA | NA | NA | 0.3 | 0.05 | NA | NA | |
| Sampling Location | River Mile | ||||||||||||||||
| Carmel Valley Aquifer | |||||||||||||||||
| 16S/1W-14Jh (shal) | 0.07 | 6420 | 190 | 7.0 | 1835 | 395 | 0.18 | <1 | 4.7 | 44 | 1118 | 102 | 50.1 | 3.752 | 0.139 | 0.15 | 0.54 |
| 16S/1W-14Jf (inter) | 0.07 | 26000 | 154 | 6.8 | 8590 | 2089 | 0.45 | <1 | 1.6 | 260 | 197 | 431 | 158 | 9.915 | 0.431 | 0.17 | 2.08 |
| 16S/1W-14Jg (deep) | 0.07 | 2190 | 252 | 7.2 | 483 | 114 | 0.75 | <1 | 3.0 | 92 | 256 | 65 | 8.0 | 0.322 | 0.401 | 0.14 | 0.31 |
| 16S/1W-13Mc (shal) | 0.31 | 780 | 267 | 7.0 | 94 | <0.5 | 3.51 | <1 | 4.5 | 52 | 60 | 23 | 5.3 | 2.314 | 1.92 | 1.94 | 0.36 |
| 16S/1W-13Mb (inter) | 0.31 | 800 | 208 | 7.1 | 76 | 102 | 0.52 | <1 | 2.3 | 75 | 47 | 23 | 3.7 | 3.043 | 0.567 | 0.07 | 0.32 |
| 16S/1W-13Md (deep) | 0.31 | 880 | 246 | 7.2 | 96 | 79 | 0.80 | <1 | 2.2 | 73 | 66 | 23 | 4.0 | 0.436 | 0.409 | 0.08 | 0.44 |
| 16S/1W-13Lb (shal) | 0.65 | 1360 | 282 | 7.1 | 140 | 247 | 0.57 | <1 | 3.0 | 132 | 101 | 43 | 4.7 | 3.725 | 0.783 | 0.31 | 0.52 |
| 16S/1W-13La (inter) | 0.65 | 880 | 220 | 7.3 | 84 | 111 | 1.03 | <1 | 2.4 | 86 | 58 | 26 | 4.4 | 2.708 | 0.706 | 0.45 | 0.47 |
| 16S/1W-13Lc (deep) | 0.65 | 880 | 200 | 7.2 | 83 | 127 | 0.69 | <1 | 2.4 | 74 | 89 | 18 | 3.3 | 2.326 | 0.682 | 0.45 | 0.24 |
| 16S/1E-17J4 | 3.85 | 390 | 106 | 6.8 | 22 | 58 | <0.05 | <1 | 1.3 | 38 | 23 | 13 | 3.1 | 0.322 | 0.027 | <0.03 | 0.39 |
| 16S/1E-17R2 | 3.86 | 1020 | 198 | 6.7 | 88 | 204 | 0.27 | <1 | 4.0 | 109 | 75 | 24 | 3.7 | 5.998 | 0.253 | 0.49 | 0.46 |
| 16S/1E-23E4 | 6.53 | 1280 | 334 | 7.0 | 111 | 99 | 0.14 | <1 | 2.6 | 124 | 99 | 29 | 2.5 | 3.631 | 0.874 | 0.1 | 0.35 |
| 16S/1E-23La | 6.72 | 490 | 112 | 6.8 | 38 | 76 | 0.11 | <1 | 1.1 | 41 | 29 | 14 | 3.4 | 1.856 | 0.233 | <0.03 | 0.37 |
| 16S/1E-24N5 | 8.02 | 440 | 126 | 7.0 | 27 | 54 | <0.05 | <1 | 1.2 | 39 | 29 | 11 | 2.7 | 0.148 | 0.095 | <0.03 | 0.34 |
| Seaside Basin | |||||||||||||||||
| 15S/1E-15N3 (shal) | 340 | 71 | 7.9 | 48 | 18 | 0.11 | <1 | <0.2 | 17 | 36 | 4 | 3.1 | <0.05 | <0.0005 | <0.03 | 0.21 | |
| 15S/1E-15N2 (deep) | 1050 | 221 | 7.9 | 156 | 45 | 0.15 | <1 | 0.50 | 73 | 106 | 15 | 4.4 | 0.110 | 0.072 | <0.03 | 0.28 | |
| 15S/1E-23Ca (shal) | 990 | 248 | 8.3 | 127 | 51 | <0.05 | <1 | 1.50 | 85 | 90 | 18 | 4.2 | 0.556 | 0.185 | 0.35 | 0.18 | |
| 15S/1E-23Cb (deep) | 1300 | 298 | 8.2 | 178 | 107 | 0.45 | <1 | 1.1 | 106 | 120 | 23 | 6.3 | 0.155 | 0.082 | <0.03 | 0.38 | |
| 15S/1E-15F1 (shal) | 320 | 70 | 8.1 | 50 | 11 | <0.05 | 5 | <0.2 | 19 | 32 | 5 | 2.1 | 0.107 | <0.0005 | <0.03 | 0.29 | |
| 15S/1E-15F2 (deep) | 1020 | 266 | 7.9 | 158 | 44 | 0.10 | <1 | 0.90 | 78 | 104 | 16 | 5.0 | 1.192 | 0.131 | 0.47 | 0.28 | |
| 15S/1E-15K5 (shal) | 370 | 89 | 7.7 | 56 | 13 | <0.05 | <1 | 2.50 | 27 | 40 | 7 | 2.7 | 4.071 | 0.213 | 0.44 | 0.15 | |
| 15S/1E-15K4 (deep) | 880 | 236 | 8.1 | 115 | 40 | 0.06 | <1 | 0.70 | 60 | 93 | 12 | 4.1 | 0.812 | 0.124 | 0.13 | 0.28 | |
| 15S/1E-11Pa (shal) | 350 | 67 | 7.9 | 58 | 13 | 0.08 | <1 | 0.20 | 21 | 33 | 4 | 3.4 | <0.05 | <0.0005 | <0.03 | 0.24 | |
| 15S/1E-11Pb (deep) | 450 | 94 | 8.1 | 72 | 15 | <0.05 | <1 | <0.2 | 25 | 50 | 3 | 3.3 | 0.100 | <0.0005 | <0.03 | 0.19 | |
| 15S/1E-12Fa (shal) | 370 | 75 | 7.9 | 57 | 17 | 0.06 | <1 | 0.20 | 21 | 38 | 5 | 1.8 | 0.108 | <0.0005 | <0.03 | 0.39 | |
| 15S/1E-12Fc (deep) | 400 | 86 | 8.0 | 62 | 15 | 0.07 | <1 | 0.50 | 23 | 40 | 6 | 2.4 | 0.573 | 0.139 | <0.03 | 0.33 | |
| NOTES: | |||||||||||||||||
| (1) Maximum contaminant levels are from California Domestic Water Quality and Monitoring Regulations, Title 22, 1977. | |||||||||||||||||
| (2) The three values listed for certain constituents refer to the "recommended" level, the "upper" level, and "short-term use" level, respectively. | |||||||||||||||||
| Additional NOTES: Joe edited this spreadsheet for staff note…find data management code for subsequent tables. | |||||||||||||||||
| Change in sp. cond., sodium and chloride look scarey for 14Jf | |||||||||||||||||
| Sodium really high, in 14Jh and 14Jf, although spec. cond. declined in both | |||||||||||||||||
| Potassium and Orthophosphate higher in many wells relative to last year | |||||||||||||||||
| PQL for Mn rose from 0.03 to 0.05 mg/l | |||||||||||||||||
| PQL for Fe dropped from 0.1 to 0.05 mg/l (or were we just rounding off) | |||||||||||||||||
| Sp. cond. In 23Ca is up from 798 mg/l in fall 2002. | |||||||||||||||||
| 14Jf Conductivity = 22,300 umhos | |||||||||||||||||
| Full strength seawater (sw) ~50,000 umhos, sp 14Jf is ~45% sw | |||||||||||||||||
| Comparing Mg and K to sw: | |||||||||||||||||
| Full strength sw | 45% sw | Fall 2003 14J | |||||||||||||||
| Mg | K | Mg | K | Mg | K | ||||||||||||
| 1350 | 380 | 602 | 169 | 502 | 129 | ||||||||||||
| So, based on the above, MG and K are NOT out of line for Fall 2003. | |||||||||||||||||
| Something was wrong with the Fall 2002 analysis for Na and K, however. | |||||||||||||||||