| The source for the Valley Field water supply is two bedrock wells and a pump station. Well # 1 is located 300 feet south of the pump house. Well # 3 is located 492 feet southwest of the pump house. Treatment consist of manganese green sand filtration to remove iron and manganese, aeration to remove radon, and chlorine addition to kill bacteria. | |||||||||||
| VALLEY FIELD APTS/NORTHLAND | |||||||||||
| EPA # 1932070 | |||||||||||
| Inorganic Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||
| Barium | ppm | 2 | 2 | 0.032 | n/a | 2005 | NO | Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits | |||
| Inorganic Contaminants | Units | MCLG | AL | 90th percentile sample value | # sites above AL | Date | Violation Yes/No | Typical Source of Contaminant | |||
| Copper | ppm | 1.3 | 1.3 | 0.1 | 0 of 5 | 2006 | NO | Corrosion of household plumbing system | |||
| Volatile Organic Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||
| Total Trihalomethanes (TTHMs) | ppb | 0 | 80 | 8.1 | n/a | 2006 | NO | By-product of drinking water chlorination. | |||
| Haloacetic Acids (HAA5) | ppb | 0 | 60 | 1.3 | n/a | 2004 | NO | By-product of drinking water chlorination. | |||
| Volatile Organic Contaminants | Units | MRDLG | MRDL | Average Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||
| Chlorine | ppm | 4 | 4 | 0.39 | 0.2 to 0.5 | 2006 | NO | Water additive used to control microbes | |||
| Radiological Contaminants | Units | MCLG | MCL | Level Detected | Range | Date | Violation Yes/No | Typical Source of Contamination | |||
| Gross Alpha (Compliance) | pCi/L | 0 | 15 | 2.2 | nd - 2.2 | 2006 | NO | Erosion of natural deposits | |||
| Combined Radium | pCi/L | 0 | 5 | 1.0 | 0.6 - 1.0 | 2006 | NO | Erosion of natural deposits | |||
| Uranium | ppb | 0 | 30 | 1.2 | nd - 1.2 | 2006 | NO | Erosion of natural deposits | |||
| Source Assessment Information | |||||||||||
| Summary of Susceptibility Factors | |||||||||||
| Source Name | Date | Low | Med | High | |||||||
| Bedrock Well # 1 | 8/3/01 | 7 | 3 | 2 | |||||||
| Bedrock Well # 3 | 8/3/01 | 8 | 3 | 1 | |||||||
| The complete Assessment Report is available for inspection. For more information call Gary Tetley or visit NH DES's Drinking Water Source Assessment Program web site at www.des.state.nh.us/dwspp | |||||||||||