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Range of Concentrations - The gross alpha results ranged from non detectable to 481 pCi/l. Geographic Distribution – The counties with the highest percent of exceedances

were Camden (33%), (See Figure 7) Additional Sampling present in the ground the future gross alpha

Cumberland (25%), Salem (14%), and Gloucester (11%).

  • -

    There is considerable evidence that radionuclides are

water in Northern New Jersey. It is recommended that in testing be extended to all counties in New Jersey.

4.

Volatile Organic Compounds

New Jersey has primary drinking water standards, or Maximum Contaminant Levels (MCLs), for 26 volatile organic compounds (VOCs):

  • Sources - VOCs include solvents, degreasers, and components of gasoline. (See Table 2 for a more detailed description of sources).

  • Counties that Sampled - All counties were required to sample for VOCs.

  • MCLs - The individual MCLs for the 26 regulated VOCs are listed in Table 2.

  • Number of Wells that exceeded one or more MCLs - One or more VOCs were detected above their MCL in 702 wells (1.4%) of the 51,028 wells. A total of 636 wells exceeded a standard for one VOC; 55 wells exceeded two MCLs, and 11 wells exceeded three MCLs. See Table 3 for a summary of the VOCs that were detected over their respective MCLs. A summary of the VOC exceedances by county are presented by county in Appendix J.

  • VOCs that most frequently exceeded their MCL - There were 247 wells that exceeded the trichloroethylene MCL (0.5%), 223 wells that exceeded the tetrachloroethylene MCL (0.4%), 66 wells that exceeded the benzene MCL

    • (0.1

      %) and 58 wells that exceeded the carbon tetrachloride (0.1%).

  • Geographic Distribution – No geographic pattern was observed. (See Figure 8)

19

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