Full Water Quality Report
Download Raw Water Quality Data CSVSample Point - SX2-D5-US |
Download Sample Point Report CSV / Inflow: No / Outflow: No
Date | Source | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | Temp - Field (C) | D. O (mg/L) Field | D. O (mg/L) Lab | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Field (mg/L) | Fe+2 - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | Sulfate (Mg/L) Lab | TSS - Lab (mg/L) | Ca (Total) (mg/L) Lab | Ca (Dissolved) (mg/L) Lab | Chloride (Total) (mg/L) Lab | Mg (Total) (mg/L) Lab | Mg (Dissolved) (mg/L) Lab | T. PO4 (mg/L) | D. PO4 (mg/L) | K (mg/L) Lab | Full - Na (mg/L) Lab | Zn (mg/L) Lab | Zn (Dissolved) (mg/L) Lab | Sampler Person | Sampler Company | Sampler Lab | Comments | Specific Conductance Field (mS/cm) | Cd (Total) (mg/L) | Carbon (Total) (mg/L) | Be (Total) (mg/L) | Ba (Total) (mg/L) | Boron (Total) (mg/L) | As (Total) (mg/L) | Se (Total) (mg/L) | Sb (Total) (mg/L) | Pb (Total) (mg/L) | Sn (Total) (mg/L) | V (Total) (mg/L) | TSS (mg/L) | Ni (Total) (mg/L) | Cu (Total) (mg/L) | Cr (Total) (mg/L) | Hardness (mg/L) | Hg (Total) (mg/L) | Mo (Total) (mg/L) | Nitrate (Total) (mg/L) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021-06-02 | -- | -- | -- | 6.83 | 8.02 | -- | -- | -- | -- | 139 | 13.7 | <20.0 | 8.58 | -- | -- | <0.200 | -- | <0.100 | -- | 0.0428 | -- | 34.4 | <1.60 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SFU & BTtwp | Fairway | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2023-04-25 | -- | -- | -- | 6.45 | 6.79 | -- | -- | -- | -- | 152 | -- | 8.9 | 18.32 | -- | -- | <0.10 | -- | 0.43 | -- | <0.05 | -- | 49.3 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minimum: | -- | -- | -- | 6.45 | 6.79 | -- | -- | -- | -- | 139 | 13.7 | 8.9 | 8.58 | -- | -- | -- | -- | 0.43 | -- | 0.0428 | -- | 34.4 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Maximum: | -- | -- | -- | 6.83 | 8.02 | -- | -- | -- | -- | 152 | 13.7 | 8.9 | 18.32 | -- | -- | -- | -- | 0.43 | -- | 0.0428 | -- | 49.3 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Average: | -- | -- | -- | 6.64 | 7.41 | -- | -- | -- | -- | 146 | 13.70 | 9 | 13.5 | -- | -- | -- | -- | 0.43 | -- | 0.04 | -- | 41.9 | 6.0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Range: | -- | -- | -- | 0.38 | 1.23 | -- | -- | -- | -- | 13 | 0 | 0 | 9.74 | -- | -- | -- | -- | 0 | -- | 0 | -- | 14.9 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Median: | -- | -- | -- | 6.64 | 7.41 | -- | -- | -- | -- | 145.5 | 13.7 | 8.9 | 13.45 | -- | -- | -- | -- | 0.43 | -- | 0.04 | -- | 41.85 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loading (lb/day): | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Sample Point Description:
Six Mile; Upstream of the SX2-D5 system
- 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 - SX0-D9-DS |
Download Sample Point Report CSV / Inflow: No / Outflow: No
Date | Source | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | Temp - Field (C) | D. O (mg/L) Field | D. O (mg/L) Lab | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Field (mg/L) | Fe+2 - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | Sulfate (Mg/L) Lab | TSS - Lab (mg/L) | Ca (Total) (mg/L) Lab | Ca (Dissolved) (mg/L) Lab | Chloride (Total) (mg/L) Lab | Mg (Total) (mg/L) Lab | Mg (Dissolved) (mg/L) Lab | T. PO4 (mg/L) | D. PO4 (mg/L) | K (mg/L) Lab | Full - Na (mg/L) Lab | Zn (mg/L) Lab | Zn (Dissolved) (mg/L) Lab | Sampler Person | Sampler Company | Sampler Lab | Comments | Specific Conductance Field (mS/cm) | Cd (Total) (mg/L) | Carbon (Total) (mg/L) | Be (Total) (mg/L) | Ba (Total) (mg/L) | Boron (Total) (mg/L) | As (Total) (mg/L) | Se (Total) (mg/L) | Sb (Total) (mg/L) | Pb (Total) (mg/L) | Sn (Total) (mg/L) | V (Total) (mg/L) | TSS (mg/L) | Ni (Total) (mg/L) | Cu (Total) (mg/L) | Cr (Total) (mg/L) | Hardness (mg/L) | Hg (Total) (mg/L) | Mo (Total) (mg/L) | Nitrate (Total) (mg/L) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021-06-02 | -- | -- | -- | 7.46 | 7.69 | -- | -- | -- | -- | 381 | 20.5 | 25.7 | -2.02 | -- | -- | 0.212 | -- | 0.435 | -- | 0.187 | -- | 146 | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SFU & BTtwp | Fairway | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2023-06-24 | -- | -- | -- | -- | 7.42 | -- | -- | -- | -- | 670 | -- | 38.48 | -22.73 | -- | -- | 0.30 | -- | 0.25 | -- | 0.10 | -- | 301.6 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minimum: | -- | -- | -- | 7.46 | 7.42 | -- | -- | -- | -- | 381 | 20.5 | 25.7 | -22.73 | -- | -- | 0.212 | -- | 0.25 | -- | 0.10 | -- | 146 | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Maximum: | -- | -- | -- | 7.46 | 7.69 | -- | -- | -- | -- | 670 | 20.5 | 38.48 | -2.02 | -- | -- | 0.30 | -- | 0.435 | -- | 0.187 | -- | 301.6 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Average: | -- | -- | -- | 7.46 | 7.51 | -- | -- | -- | -- | 574 | 20.50 | 34 | -15.8 | -- | -- | 0.27 | -- | 0.31 | -- | 0.13 | -- | 249.7 | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Range: | -- | -- | -- | 0 | 0.27 | -- | -- | -- | -- | 289 | 0 | 12.78 | 20.71 | -- | -- | 0.088 | -- | 0.185 | -- | 0.087 | -- | 155.6 | 1.6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Median: | -- | -- | -- | 7.46 | 7.42 | -- | -- | -- | -- | 670 | 20.5 | 38.48 | -22.73 | -- | -- | 0.3 | -- | 0.25 | -- | 0.1 | -- | 301.6 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loading (lb/day): | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Sample Point Description:
Six Mile; Downstream of the SX0-D9 passive treatment system
- 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 - SMR-US |
Download Sample Point Report CSV / Inflow: No / Outflow: No
Date | Source | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | Temp - Field (C) | D. O (mg/L) Field | D. O (mg/L) Lab | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Field (mg/L) | Fe+2 - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | Sulfate (Mg/L) Lab | TSS - Lab (mg/L) | Ca (Total) (mg/L) Lab | Ca (Dissolved) (mg/L) Lab | Chloride (Total) (mg/L) Lab | Mg (Total) (mg/L) Lab | Mg (Dissolved) (mg/L) Lab | T. PO4 (mg/L) | D. PO4 (mg/L) | K (mg/L) Lab | Full - Na (mg/L) Lab | Zn (mg/L) Lab | Zn (Dissolved) (mg/L) Lab | Sampler Person | Sampler Company | Sampler Lab | Comments | Specific Conductance Field (mS/cm) | Cd (Total) (mg/L) | Carbon (Total) (mg/L) | Be (Total) (mg/L) | Ba (Total) (mg/L) | Boron (Total) (mg/L) | As (Total) (mg/L) | Se (Total) (mg/L) | Sb (Total) (mg/L) | Pb (Total) (mg/L) | Sn (Total) (mg/L) | V (Total) (mg/L) | TSS (mg/L) | Ni (Total) (mg/L) | Cu (Total) (mg/L) | Cr (Total) (mg/L) | Hardness (mg/L) | Hg (Total) (mg/L) | Mo (Total) (mg/L) | Nitrate (Total) (mg/L) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-05-24 | -- | -- | -- | 7.28 | 7.36 | -- | -- | -- | -- | 490 | -- | 25.40 | -13.52 | -- | -- | 0.12 | -- | 0.17 | -- | 0.10 | -- | 225.9 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minimum: | -- | -- | -- | 7.28 | 7.36 | -- | -- | -- | -- | 490 | -- | 25.40 | -13.52 | -- | -- | 0.12 | -- | 0.17 | -- | 0.10 | -- | 225.9 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Maximum: | -- | -- | -- | 7.28 | 7.36 | -- | -- | -- | -- | 490 | -- | 25.40 | -13.52 | -- | -- | 0.12 | -- | 0.17 | -- | 0.10 | -- | 225.9 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Average: | -- | -- | -- | 7.28 | 7.36 | -- | -- | -- | -- | 490 | -- | 25 | -13.5 | -- | -- | 0.12 | -- | 0.17 | -- | 0.10 | -- | 225.9 | 6.0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Range: | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | 0 | -- | 0 | 0 | -- | -- | 0 | -- | 0 | -- | 0 | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Median: | -- | -- | -- | 7.28 | 7.36 | -- | -- | -- | -- | 490 | -- | 25.4 | -13.52 | -- | -- | 0.12 | -- | 0.17 | -- | 0.1 | -- | 225.9 | 6 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 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 - SMR-DOWN |
Download Sample Point Report CSV / Inflow: No / Outflow: No
Date | Source | Method of Flow | Flow - Field (gal/min) | pH - Field (S.U.) | pH - Lab (S.U.) | ORP - Field (mvolts) | Temp - Field (C) | D. O (mg/L) Field | D. O (mg/L) Lab | Cond - Lab (umhos/cm) | Alkalinity - Field (mg/L) | Alkalinity - Lab (mg/L) | Acidity - Lab (mg/L) | T. Fe - Field (mg/L) | Fe+2 - Lab (mg/L) | T. Fe - Lab (mg/L) | D. Fe - Lab (mg/L) | T. Al - Lab (mg/L) | D. Al - Lab (mg/L) | T. Mn - Lab (mg/L) | D. Mn - Lab (mg/L) | Sulfate (Mg/L) Lab | TSS - Lab (mg/L) | Ca (Total) (mg/L) Lab | Ca (Dissolved) (mg/L) Lab | Chloride (Total) (mg/L) Lab | Mg (Total) (mg/L) Lab | Mg (Dissolved) (mg/L) Lab | T. PO4 (mg/L) | D. PO4 (mg/L) | K (mg/L) Lab | Full - Na (mg/L) Lab | Zn (mg/L) Lab | Zn (Dissolved) (mg/L) Lab | Sampler Person | Sampler Company | Sampler Lab | Comments | Specific Conductance Field (mS/cm) | Cd (Total) (mg/L) | Carbon (Total) (mg/L) | Be (Total) (mg/L) | Ba (Total) (mg/L) | Boron (Total) (mg/L) | As (Total) (mg/L) | Se (Total) (mg/L) | Sb (Total) (mg/L) | Pb (Total) (mg/L) | Sn (Total) (mg/L) | V (Total) (mg/L) | TSS (mg/L) | Ni (Total) (mg/L) | Cu (Total) (mg/L) | Cr (Total) (mg/L) | Hardness (mg/L) | Hg (Total) (mg/L) | Mo (Total) (mg/L) | Nitrate (Total) (mg/L) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-05-24 | -- | -- | -- | 7.14 | 7.19 | -- | -- | -- | -- | 549 | -- | 18.76 | -9.60 | -- | -- | 0.78 | -- | 0.89 | -- | 0.28 | -- | 263.3 | 10 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minimum: | -- | -- | -- | 7.14 | 7.19 | -- | -- | -- | -- | 549 | -- | 18.76 | -9.60 | -- | -- | 0.78 | -- | 0.89 | -- | 0.28 | -- | 263.3 | 10 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Maximum: | -- | -- | -- | 7.14 | 7.19 | -- | -- | -- | -- | 549 | -- | 18.76 | -9.60 | -- | -- | 0.78 | -- | 0.89 | -- | 0.28 | -- | 263.3 | 10 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Average: | -- | -- | -- | 7.14 | 7.19 | -- | -- | -- | -- | 549 | -- | 19 | -9.6 | -- | -- | 0.78 | -- | 0.89 | -- | 0.28 | -- | 263.3 | 10.0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Range: | -- | -- | -- | 0 | 0 | -- | -- | -- | -- | 0 | -- | 0 | 0 | -- | -- | 0 | -- | 0 | -- | 0 | -- | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Median: | -- | -- | -- | 7.14 | 7.19 | -- | -- | -- | -- | 549 | -- | 18.76 | -9.6 | -- | -- | 0.78 | -- | 0.89 | -- | 0.28 | -- | 263.3 | 10 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 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.