| GREEN HILL ESTATES | EPA # 1973030 | |||||||||||
| Inorganic Contaminants | Date(s) Collected | Highest Detect | Range Detected | MCL or MRDL | MCLG or MRDLG | Violation Yes/No | Typical Source of Contaminant | |||||
| Barium (ppm) | 8/27/10 | 0.0095 | N/A | 2 | 2 | No | Erosion of natural deposits | |||||
| Nitrate as Nitrogen (ppm | 9/8/10 | 0.65 | 0.32 - 0.65 | 10 | 10 | No | Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits. | |||||
| Volatile Organic Contaminants | ||||||||||||
| Chlorine (ppm) | 2010 | 0.37 Avg | 0.1 - 0.6 | 4 | 4 | No | Water additive used to control microbes | |||||
| Total Trihalomethanes (ppb) | 8/10/10 | 14 | N/A | 80 | 0 | No | By-product of drinking water chlorination | |||||
| Haloacetic Acids (ppb) | 8/10/10 | 1.3 | N/A | 60 | 0 | No | By-product of drinking water chlorination | |||||
| Radiological Contaminants | ||||||||||||
| Compliance Gross Alpha (pCi/L) | 2/15/05 | 0.3 | 0.1 - 0.3 | 15 | 0 | No | Erosion of natural deposits | |||||
| Radium 226 & 228 (pCi/L) | 2/16/07 | 0.4 | 0.2 - 0.4 | 5 | 0 | No | Erosion of natural deposits | |||||
| Uranium (ppb) | 2/15/05 | 0.3 | N/A | 30 | 0 | No | Erosion of natural deposits | |||||
| Date(s) Collected | 90th Percentile | Action Level | MCLG | Number of Sites Sampled | # sites above Action Level | Violation Yes/No | Typical Source of Contaminant | |||||
| Copper (ppm) | 11/21/08 11/22/08 | < 5 | 1.3 | 1.3 | 11 | 0 | No | Corrosion of household plumbing system | ||||
| Lead (ppb) | 11/21/08 11/22/08 | 0.108 | 15 | 0 | 11 | 0 | No | Corrosion of household plumbing system | ||||
| What is the source of my drinking water? | ||||||||||||
| The current source of the Green Hills water supply is the town water supply for Raymond that consists of three gravel pack wells. All three wells are located between the Cammett Recreation Area and the Lamprey River behind the Town's Safety Complex. The well site and well #1 were purchased in 1978 and produces over 200 gallons per minute. Well # 2 was developed in 1988 and produces over 350 gallons per minute. Well # 3 was developed in 2004 and produces approximately 300 gallons per minute. Treatment consists of aeration to reduce the level of Radon, manganese green sand filtration to remove iron and manganese, pH adjustment to reduce corrosion, and chlorine addition to kill bacteria. | ||||||||||||
| BULK WATER: Due to unusually high water demand bulk water was delivered to the Raymond Water Department on July 6 and July 7, 2010. The source of the water was Buxton Water in Epping, NH. The total amount of water delivered was 122,000 gallons. | ||||||||||||
| Source Water Assessment Summary | ||||||||||||
| Summary of Susceptibility Factors | ||||||||||||
| Source Name | Date | Low | Med | High | ||||||||
| Gravel Pack Well # 1 | 12/3/2004 | 9 | 2 | 1 | ||||||||
| Gravel Pack Well # 2 | 12/3/2004 | 9 | 2 | 1 | ||||||||
| Gravel Pack Well # 3 | 12/3/2004 | 9 | 2 | 1 | ||||||||
| The complete Assessment Report is available for review. For more information call Gary Tetley at 800-553-5191 ext. 2378 or visit NH Department of Environmental Services Drinking Water and Groundwater Bureau web site at http://www.des.nh.gov/organization/divisions/water/dwgb/dwspp/reports/index.htm | ||||||||||||