Standard Water Quality Report
Download Raw Water Quality Data CSVSample Point - K1 Raw |
Date | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | DO - Field (mg/L) | Temp - Field (C) | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | SO4 - Lab (mg/L) | TSS - Lab (mg/L) | Ferrous Iron (mg/L) Lab |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2014-06-13 | -- | 599 | 5.15 | 4.6 | -- | -- | -- | 462 | -- | 1.35 | 28.86 | 0.75 | -- | 0.37 | -- | 6.41 | -- | 189.9 | <5 | -- |
2016-04-08 | -- | -- | 4.48 | 4.36 | -- | -- | -- | 430 | -- | -- | 24.08 | 0.8 | -- | 0.29 | -- | 6.93 | -- | 161 | 9 | -- |
2016-05-19 | -- | 431 | 4.92 | 4.6 | -- | -- | -- | 427 | -- | -- | 20.5 | 1.62 | -- | 0.28 | -- | 1.62 | -- | 182.5 | 25 | -- |
2016-08-26 | -- | 173 | 4.63 | 4.03 | -- | -- | -- | 533 | -- | -- | 45.25 | 1.08 | -- | 0.43 | -- | 6.16 | -- | 262.8 | <5 | -- |
2020-04-08 | -- | -- | -- | 4.94 | -- | -- | -- | 338 | -- | 4.12 | 14.58 | 0.69 | -- | 0.2 | -- | 2.87 | -- | 138.3 | 5 | -- |
2020-05-06 | -- | -- | -- | 5.23 | -- | -- | -- | 307 | -- | 0.76 | 7.68 | 0.44 | -- | 0.16 | -- | 1.9 | -- | 139.5 | 18 | -- |
2023-03-20 | -- | 883 | -- | 4.91 | -- | -- | -- | 360 | -- | 1.32 | 27.44 | 0.56 | -- | 0.23 | -- | 2.41 | -- | 169.1 | <5 | -- |
2023-05-11 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
2023-05-11 | -- | -- | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Minimum: | -- | 173 | 4.4 | 4.03 | -- | -- | -- | 307 | -- | 0.76 | 7.68 | 0.44 | -- | 0.16 | -- | 1.62 | -- | 138.3 | 5 | -- |
Maximum: | -- | 883 | 5.15 | 5.23 | -- | -- | -- | 533 | -- | 4.12 | 45.25 | 1.62 | -- | 0.43 | -- | 6.93 | -- | 262.8 | 25 | -- |
Average: | -- | 522 | 4.72 | 4.67 | -- | -- | -- | 408 | -- | 2 | 24.1 | 0.85 | -- | 0.28 | -- | 4.04 | -- | 177.6 | 14.3 | -- |
Range: | -- | 710 | 0.75 | 1.2 | -- | -- | -- | 226 | -- | 3.36 | 37.57 | 1.18 | -- | 0.27 | -- | 5.31 | -- | 124.5 | 20 | -- |
Median: | -- | 515 | 4.63 | 4.6 | -- | -- | -- | 427 | -- | 1.34 | 24.08 | 0.75 | -- | 0.28 | -- | 2.87 | -- | 169.1 | 13.5 | -- |
Loading (lb/day): | -- | 11.87 | 174.83 | 5.5 | -- | 1.86 | -- | 23.23 | -- |
Sample Point Description:
- Records with no value are not included in statistical calculations.
- Values lower than the minimum detection limit are assumed to be 0.
- Average pH is calculated using the arithmetic mean of pH values. Hydronium ion concentrations were not used.
- This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
Sample Point - K1 DLB North Out |
Date | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | DO - Field (mg/L) | Temp - Field (C) | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | SO4 - Lab (mg/L) | TSS - Lab (mg/L) | Ferrous Iron (mg/L) Lab |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2023-03-20 | -- | 124 | -- | 7.92 | -- | -- | -- | 455 | -- | 59.39 | -41.71 | <0.1 | -- | <0.05 | -- | 0.12 | -- | 161.2 | <5 | -- |
2023-05-11 | -- | -- | 7.01 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Minimum: | -- | 124 | 7.01 | 7.92 | -- | -- | -- | 455 | -- | 59.39 | -41.71 | -- | -- | -- | -- | 0.12 | -- | 161.2 | -- | -- |
Maximum: | -- | 124 | 7.01 | 7.92 | -- | -- | -- | 455 | -- | 59.39 | -41.71 | -- | -- | -- | -- | 0.12 | -- | 161.2 | -- | -- |
Average: | -- | 124 | 7.01 | 7.92 | -- | -- | -- | 455 | -- | 59 | -41.7 | -- | -- | -- | -- | 0.12 | -- | 161.2 | -- | -- |
Range: | -- | 0 | 0 | 0 | -- | -- | -- | 0 | -- | 0 | 0 | -- | -- | -- | -- | 0 | -- | 0 | -- | -- |
Median: | -- | 124 | 7.01 | 7.92 | -- | -- | -- | 455 | -- | 59.39 | -41.71 | -- | -- | -- | -- | 0.12 | -- | 161.2 | -- | -- |
Loading (lb/day): | -- | 88.52 | -62.17 | -- | -- | -- | -- | 0.18 | -- |
Sample Point Description:
- Records with no value are not included in statistical calculations.
- Values lower than the minimum detection limit are assumed to be 0.
- Average pH is calculated using the arithmetic mean of pH values. Hydronium ion concentrations were not used.
- This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
Sample Point - K1 DLB South Out |
Date | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | DO - Field (mg/L) | Temp - Field (C) | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | SO4 - Lab (mg/L) | TSS - Lab (mg/L) | Ferrous Iron (mg/L) Lab |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2023-03-20 | -- | 124 | -- | 7.65 | -- | -- | -- | 474 | -- | 68.38 | -46.84 | <0.1 | -- | <0.05 | -- | <0.10 | -- | 169.7 | <5 | -- |
2023-05-11 | -- | -- | 6.95 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Minimum: | -- | 124 | 6.95 | 7.65 | -- | -- | -- | 474 | -- | 68.38 | -46.84 | -- | -- | -- | -- | -- | -- | 169.7 | -- | -- |
Maximum: | -- | 124 | 6.95 | 7.65 | -- | -- | -- | 474 | -- | 68.38 | -46.84 | -- | -- | -- | -- | -- | -- | 169.7 | -- | -- |
Average: | -- | 124 | 6.95 | 7.65 | -- | -- | -- | 474 | -- | 68 | -46.8 | -- | -- | -- | -- | -- | -- | 169.7 | -- | -- |
Range: | -- | 0 | 0 | 0 | -- | -- | -- | 0 | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | 0 | -- | -- |
Median: | -- | 124 | 6.95 | 7.65 | -- | -- | -- | 474 | -- | 68.38 | -46.84 | -- | -- | -- | -- | -- | -- | 169.7 | -- | -- |
Loading (lb/day): | -- | 101.92 | -69.81 | -- | -- | -- | -- | -- | -- |
Sample Point Description:
- Records with no value are not included in statistical calculations.
- Values lower than the minimum detection limit are assumed to be 0.
- Average pH is calculated using the arithmetic mean of pH values. Hydronium ion concentrations were not used.
- This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
Sample Point - K1 DLB Combined Out |
There is no water data for this sample point
Sample Point - K2 Raw |
Date | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | DO - Field (mg/L) | Temp - Field (C) | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | SO4 - Lab (mg/L) | TSS - Lab (mg/L) | Ferrous Iron (mg/L) Lab |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2016-04-08 | -- | -- | 4.09 | 4.37 | -- | -- | -- | 428 | -- | -- | 28.06 | <0.10 | -- | 0.26 | -- | 6.42 | -- | 169.3 | <5 | -- |
2016-05-19 | -- | 164 | 4.47 | 3.98 | -- | -- | -- | 446 | -- | -- | 29.85 | <0.10 | -- | 0.26 | -- | <0.10 | -- | 205.9 | 11 | -- |
2016-08-26 | -- | 46 | 3.86 | 3.79 | -- | -- | -- | 558 | -- | -- | 53.53 | <0.10 | -- | 0.46 | -- | 8.64 | -- | 254.3 | <5 | -- |
2020-04-08 | -- | -- | -- | 4.87 | -- | -- | -- | 314 | -- | 4.21 | 23.25 | <0.10 | -- | 0.16 | -- | 2.56 | -- | 132.4 | <5 | -- |
2020-05-06 | -- | -- | -- | 5.12 | -- | -- | -- | 279 | -- | 0.81 | 6.7 | <0.10 | -- | 0.12 | -- | 1.38 | -- | 107.3 | 8 | -- |
2023-03-20 | -- | 66 | -- | 4.84 | -- | -- | -- | 336 | -- | 1.49 | 25.28 | <0.1 | -- | 0.17 | -- | 1.81 | -- | 129.6 | <5 | -- |
2023-05-11 | -- | -- | 4.37 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Minimum: | -- | 46 | 3.86 | 3.79 | -- | -- | -- | 279 | -- | 0.81 | 6.7 | -- | -- | 0.12 | -- | 1.38 | -- | 107.3 | 8 | -- |
Maximum: | -- | 164 | 4.47 | 5.12 | -- | -- | -- | 558 | -- | 4.21 | 53.53 | -- | -- | 0.46 | -- | 8.64 | -- | 254.3 | 11 | -- |
Average: | -- | 92 | 4.20 | 4.50 | -- | -- | -- | 394 | -- | 2 | 27.8 | -- | -- | 0.24 | -- | 4.16 | -- | 166.5 | 9.5 | -- |
Range: | -- | 118 | 0.61 | 1.33 | -- | -- | -- | 279 | -- | 3.4 | 46.83 | -- | -- | 0.34 | -- | 7.26 | -- | 147 | 3 | -- |
Median: | -- | 66 | 4.23 | 4.61 | -- | -- | -- | 382 | -- | 1.49 | 26.67 | -- | -- | 0.22 | -- | 2.56 | -- | 150.85 | 9.5 | -- |
Loading (lb/day): | -- | 1.18 | 36.17 | -- | -- | 0.3 | -- | 3.11 | -- |
Sample Point Description:
- Records with no value are not included in statistical calculations.
- Values lower than the minimum detection limit are assumed to be 0.
- Average pH is calculated using the arithmetic mean of pH values. Hydronium ion concentrations were not used.
- This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
Sample Point - K2 DLB Out |
Date | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | DO - Field (mg/L) | Temp - Field (C) | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | SO4 - Lab (mg/L) | TSS - Lab (mg/L) | Ferrous Iron (mg/L) Lab |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2020-04-08 | -- | -- | -- | 7.72 | -- | -- | -- | 489 | -- | 121.61 | -111.9 | <0.10 | -- | <0.05 | -- | 0.41 | -- | 144.7 | <5 | -- |
2020-05-06 | -- | -- | -- | 7.85 | -- | -- | -- | 451 | -- | 107.55 | -85.5 | <0.10 | -- | <0.05 | -- | 0.28 | -- | 110.9 | 10 | -- |
2023-03-20 | -- | 66 | -- | 7.89 | -- | -- | -- | 464 | -- | 69.87 | -49.87 | <0.1 | -- | <0.05 | -- | <0.10 | -- | 164 | <5 | -- |
2023-05-11 | -- | -- | 7.52 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Minimum: | -- | 66 | 7.52 | 7.72 | -- | -- | -- | 451 | -- | 69.87 | -111.9 | -- | -- | -- | -- | 0.28 | -- | 110.9 | 10 | -- |
Maximum: | -- | 66 | 7.52 | 7.89 | -- | -- | -- | 489 | -- | 121.61 | -49.87 | -- | -- | -- | -- | 0.41 | -- | 164 | 10 | -- |
Average: | -- | 66 | 7.52 | 7.82 | -- | -- | -- | 468 | -- | 100 | -82.4 | -- | -- | -- | -- | 0.35 | -- | 139.9 | 10.0 | -- |
Range: | -- | 0 | 0 | 0.17 | -- | -- | -- | 38 | -- | 51.74 | 62.03 | -- | -- | -- | -- | 0.13 | -- | 53.1 | 0 | -- |
Median: | -- | 66 | 7.52 | 7.85 | -- | -- | -- | 464 | -- | 107.55 | -85.5 | -- | -- | -- | -- | 0.35 | -- | 144.7 | 10 | -- |
Loading (lb/day): | -- | 55.43 | -39.56 | -- | -- | -- | -- | -- | -- |
Sample Point Description:
- Records with no value are not included in statistical calculations.
- Values lower than the minimum detection limit are assumed to be 0.
- Average pH is calculated using the arithmetic mean of pH values. Hydronium ion concentrations were not used.
- This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
Sample Point - K2 Final |
Date | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | DO - Field (mg/L) | Temp - Field (C) | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | SO4 - Lab (mg/L) | TSS - Lab (mg/L) | Ferrous Iron (mg/L) Lab |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2020-05-06 | -- | -- | -- | 8.02 | -- | -- | -- | 424 | -- | 104.35 | -91.01 | 0.12 | -- | <0.05 | -- | 0.29 | -- | 101.7 | 12 | -- |
Minimum: | -- | -- | -- | 8.02 | -- | -- | -- | 424 | -- | 104.35 | -91.01 | 0.12 | -- | -- | -- | 0.29 | -- | 101.7 | 12 | -- |
Maximum: | -- | -- | -- | 8.02 | -- | -- | -- | 424 | -- | 104.35 | -91.01 | 0.12 | -- | -- | -- | 0.29 | -- | 101.7 | 12 | -- |
Average: | -- | -- | -- | 8.02 | -- | -- | -- | 424 | -- | 104 | -91.0 | 0.12 | -- | -- | -- | 0.29 | -- | 101.7 | 12.0 | -- |
Range: | -- | -- | -- | 0 | -- | -- | -- | 0 | -- | 0 | 0 | 0 | -- | -- | -- | 0 | -- | 0 | 0 | -- |
Median: | -- | -- | -- | 8.02 | -- | -- | -- | 424 | -- | 104.35 | -91.01 | 0.12 | -- | -- | -- | 0.29 | -- | 101.7 | 12 | -- |
Loading (lb/day): | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Sample Point Description:
- Records with no value are not included in statistical calculations.
- Values lower than the minimum detection limit are assumed to be 0.
- Average pH is calculated using the arithmetic mean of pH values. Hydronium ion concentrations were not used.
- This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
Sample Point - C-60 Weir |
Date | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | DO - Field (mg/L) | Temp - Field (C) | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | SO4 - Lab (mg/L) | TSS - Lab (mg/L) | Ferrous Iron (mg/L) Lab |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2014-06-13 | -- | 834 | 5.13 | 4.56 | -- | -- | -- | 417 | -- | 1.01 | 25.27 | 0.81 | -- | 0.5 | -- | 3.7 | -- | 179.8 | <5 | -- |
2014-06-13 | -- | 183 | 4.5 | 4.24 | -- | -- | -- | 445 | -- | -- | 34.83 | 0.11 | -- | 0.44 | -- | 6.79 | -- | 200 | -- | -- |
2016-05-19 | -- | 919 | 4.94 | 3.93 | -- | -- | -- | 442 | -- | -- | 28.86 | 0.73 | -- | 0.35 | -- | 0.73 | -- | 144.8 | 11 | -- |
2016-08-26 | -- | 250 | 4.58 | 4.07 | -- | -- | -- | 516 | -- | -- | 37.17 | 0.87 | -- | 0.63 | -- | 6.47 | -- | 237.1 | <5 | -- |
2020-04-08 | -- | -- | -- | 6.02 | -- | -- | -- | 324 | -- | 3.31 | 2.56 | 0.55 | -- | 0.21 | -- | 1.96 | -- | 122.7 | 11 | -- |
2020-05-06 | -- | -- | -- | 6.25 | -- | -- | -- | 300 | -- | 6.03 | 0.59 | 0.39 | -- | 0.16 | -- | 1.53 | -- | 132.1 | 14 | -- |
2020-12-09 | -- | -- | -- | 6.93 | -- | -- | -- | 585 | -- | 34.5 | -23.03 | 0.3 | -- | 0.28 | -- | <0.10 | -- | 248.5 | <5 | -- |
2023-03-20 | -- | 1754 | -- | 6.46 | -- | -- | -- | 359 | -- | 8.44 | 6.27 | 0.42 | -- | 0.15 | -- | 1.45 | -- | 134.1 | <5 | -- |
2023-05-11 | -- | -- | 5.98 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Minimum: | -- | 183 | 4.5 | 3.93 | -- | -- | -- | 300 | -- | 1.01 | -23.03 | 0.11 | -- | 0.15 | -- | 0.73 | -- | 122.7 | 11 | -- |
Maximum: | -- | 1754 | 5.98 | 6.93 | -- | -- | -- | 585 | -- | 34.5 | 37.17 | 0.87 | -- | 0.63 | -- | 6.79 | -- | 248.5 | 14 | -- |
Average: | -- | 788 | 5.03 | 5.31 | -- | -- | -- | 424 | -- | 11 | 14.1 | 0.52 | -- | 0.34 | -- | 3.23 | -- | 174.9 | 12.0 | -- |
Range: | -- | 1571 | 1.48 | 3 | -- | -- | -- | 285 | -- | 33.49 | 60.2 | 0.76 | -- | 0.48 | -- | 6.06 | -- | 125.8 | 3 | -- |
Median: | -- | 834 | 4.94 | 5.29 | -- | -- | -- | 429.5 | -- | 6.03 | 15.77 | 0.49 | -- | 0.32 | -- | 1.96 | -- | 162.3 | 11 | -- |
Loading (lb/day): | -- | 94.03 | 178.52 | 5.58 | -- | 2.98 | -- | 22.02 | -- |
Sample Point Description:
- Records with no value are not included in statistical calculations.
- Values lower than the minimum detection limit are assumed to be 0.
- Average pH is calculated using the arithmetic mean of pH values. Hydronium ion concentrations were not used.
- This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.