Modular, multi-level groundwater sampler

An apparatus for taking simultaneously two samples of groundwater from a well lined with a well casing, said well casing having multiple perforations through which perforations groundwater may pass, each sample of said two samples to be taken at a different location along the axis of said well for analysis at a location remote to said well, said apparatus comprising:

• a first hollow chamber;
• a second hollow chamber,
• said first and said second hollow chambers each having a first end and a second end and dimensioned to fit within, said well casing leaving a gap between said well casing and said first and second chamber;
• means for connecting said first chamber to said second chamber to form an axial array of chambers, said second chamber following said first chamber in said axial array, said second end of said first chamber attachable to said first end of said second chamber;
• means carried by said first and said second chambers for sealing said first and second ends of said first and second chambers, respectively, to said well casing thereby defining a first axial portion of said gap and a second axial portion of said gap, respectively;
• and
• said first and said second chambers carrying a first and a second pump and a first and second hose, respectively, said first and said second pumps in fluid communication with said first and said second axial portions of said gap, respectively, said first and second hoses carrying samples from said first and second pumps, respectively, to said remote location,
• said first chamber dimensioned to carry within it said first pump, said first hose, and said second hose.

Apparatus for taking simultaneously two samples of groundwater from a well lined with a well casing, said well casing having multiple perforations through which perforations groundwater may pass, each sample of said two samples to be taken at a different location along the axis of said well for analysis at a location remote to said well, said apparatus comprising:

• a first hollow chamber with a first diameter and having
• a first end with a second diameter smaller than said first diameter, and an opposing second end with a third diameter smaller than said first diameter,
• an exterior surface and an interior surface,
• said interior surface defining an interior space,
• a pump carried by said chamber in said interior space,
• said pump adapted for pumping a fluid sample from said chamber to said remote location,
• a hose for carrying said fluid sample to said remote location from said pump,
• first means for sealing said first end to said well casing, and
• second means for sealing said second end to said well casing;
• a second hollow chamber with a first diameter and having
• a first end with a second diameter smaller than said first diameter, and an opposing second end with a third diameter smaller than said first diameter,
• an exterior surface and an interior surface,
• said interior surface defining an interior space,
• a pump carried by said chamber in said interior space,
• said pump adapted for pumping a fluid sample from said chamber to said remote location,
• a hose for carrying said fluid sample to said remote location from said pump,
• first means for sealing said first end to said well casing, and
• second means for sealing said second end to said well casing;
• said first and said second hollow chambers each having a first end and a second end and dimensioned to fit within said well casing leaving a gap between said well casing and said first and second chamber;
• means for connecting first chamber to said second chamber to form an axial array of chambers, said second chamber following said first chamber in said axial array, said second end of said first chamber attachable to said first end of said second chamber;
• means carried by said first and said second chambers for sealing said first and second ends of said first and second chambers, respectively, to said well casing thereby defining a first axial portion of said gap and a second axial portion of said gap, respectively;
• and
• said first and said second chambers carrying a first and a second pump and a first and second hose, respectively, said first and said second pumps in fluid communication with said first and said second axial portions of said gap, respectively, said first and second hoses carrying samples from said first and second pumps, respectively, to said remote location,
• said first chamber dimensioned to carry within it said first pump, said first hose, and said second hose.