| The source of the Beaver Hollow water supply is the Beaver Hollow Well and Pump House located off Beaver Circle in Sandown, NH. Bedrock well # 1 is located 35' southeast of the pump house. Treatment consist of green sand filters to remove iron and manganese, softeners to remove hardness, chlorine for disinfection, and pH adjustment for corrosion control and treatment optimization. | |||||||||||
| BEAVER HOLLOW | |||||||||||
| EPA # 2082010 | |||||||||||
| Inorganic Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||
| Fluoride | ppm | 4 | 4 | 0.92 | n/a | 2004 | NO | Erosion of natural deposits | |||
| Inorganic Contaminants | Units | MCLG | AL | 90th percentile sample value | # sites above AL | Year | Violation Yes/No | Typical Source of Contaminant | |||
| Copper | ppm | 1.3 | 1.3 | 0.026 | 0 | 2006 | NO | Corrosion of household plumbing system | |||
| Radiological Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contamination | |||
| Gross Alpha (Compliance) | pCi/L | 0 | 15 | 13.7 | n/a | 2001 | NO | Erosion of natural deposits | |||
| Combined Radium | pCi/L | 0 | 5 | 0.6 | n/a | 2001 | NO | Erosion of natural deposits | |||
| Radon | pCi/L | Not Regulated | 2,184 | n/a | 2001 | n/a | Erosion of natural deposits | ||||
| Radon is a radioactive gas that you can't see, taste or smell. It can move up through the ground and into a home through cracks and holes in the foundation. Radon can also get into indoor air when released from tap water from showering, washing dishes, and other household activities. It is a known human carcinogen. Breathing radon can lead to lung cancer. Drinking water containing radon may cause an increased risk of stomach cancer. Presently EPA is reviewing a standard for radon in water. | |||||||||||
| Volatile Organic Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||
| Total Trihalomethanes (TTHMs) | ppb | n /a | 80 | 24 | n/a | 2006 | NO | By-product of drinking water chlorination. | |||
| Haloacetic Acids (HAA5) | ppb | n/a | 60 | 13.7 | n/a | 2005 | NO | By-product of drinking water chlorination. | |||
| Volatile Organic Contaminants | Units | MRDLG | MRDL | Yearly Running Average | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||
| Chlorine | ppm | 4 | 4 | 0.42 | nd to 0.6 | 2006 | NO | Water additive used to control microbes | |||
| Source Assessment Information | |||||||||||
| Summary of Susceptibility Factors | |||||||||||
| Source Name | Date | Low | Med | High | |||||||
| Bedrock Well # 1 | 12/17/01 | 8 | 2 | 2 | |||||||
| 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 | |||||||||||