Soil sampling system and method that allow headspace screening at spaced intervals without disturbing soil sample
View Patent ↗A soil sampling system is provided that allows headspace screening of soil samples at spaced intervals along a soil sample liner without disturbing the soil samples to be collected and shipped to a laboratory for further testing. The soil sample liner includes a plurality of cylindrical liner sections positioned end-to-end in a linear array, with each liner section having a sidewall and open ends. A shrink-wrap material covers the liner sections and holds the liner sections together as an assembled unit. Some of the liner sections have access openings formed in a sidewall thereof for providing access to the soil samples contained therein. The liner sections having access openings are interspersed between other liner sections that do not have access openings. The access openings are used by piercing the shrink-wrap material covering the access opening, and inserting a probe tip through the access opening into a headspace to measure contamination.
1. A soil sample liner for use in a soil sampling system, comprising:
a plurality of liner sections positioned end-to-end in a linear array, said liner sections each having a sidewall and open ends;
a shrink-wrap material covering said plurality of liner sections and holding said liner sections together as an assembled unit; and
at least one of said liner sections having an access opening formed in a sidewall thereof for providing access to a soil sample contained therein without disturbing a soil sample in an adjacent one of said liner sections.
2. The soil sample liner according to claim 1 , wherein said plurality of liner sections comprises a first plurality of liner sections with access openings formed in a sidewall thereof and a second plurality of liner sections without access openings formed in a sidewall thereof.
3. The soil sample liner according to claim 2 , wherein said first plurality of liner sections are positioned at spaced intervals along said soil sample liner, and said second plurality of liner sections are interspersed between said first plurality of liner sections.
4. The soil sample liner according to claim 1 , wherein said at least one liner section having said access opening is made of a transparent material that allows visual inspection of the soil core within the liner.
5. The soil sample liner according to claim 4 , wherein said transparent material is plastic.
6. The soil sample liner according to claim 4 , wherein said transparent material is PETG.
7. The soil sample liner according to claim 1 , wherein said plurality of liner sections comprises at least one stainless steel liner section without an access opening formed in a sidewall thereof and at least one transparent liner section with an access opening formed in a sidewall thereof.
8. The soil sample liner according to claim 1 , wherein said access opening is circular.
9. The soil sample liner according to claim 1 , wherein said access opening is formed at an approximate midpoint along a length of said at least one liner section.
10. The soil sample liner according to claim 1 , wherein said plurality of liner sections comprises at least one liner section without an access opening which has an interior volume corresponding to an amount of soil to be used in a standard soil test.
11. The soil sample liner according to claim 1 , wherein said plurality of liner sections are cylindrical.
12. In combination, a soil sample liner for use in a soil sampling system and a soil sample containment device, the soil sample liner comprising:
first and second liner sections positioned end-to-end in a linear array, said liner sections each having a cylindrical sidewall and open ends;
a shrink-wrap material covering said liner sections and holding said liner sections together as an assembled unit; and
said first liner section having an access opening formed in the sidewall thereof for providing access to a soil sample contained therein without disturbing a soil sample contained in said second liner section.
13. The combination according to claim 12 , wherein said soil sample containment device comprises:
first and second end caps for covering respective ends of said second liner section after the second liner section is separated from the first liner section; and
sealing means associated with the end caps for sealing respective ends of the second liner section with a compression seal to prevent loss of volatiles from a soil sample contained within the second liner section.
14. The combination according to claim 12 , wherein said soil sample containment device comprises first and second end caps for covering respective ends of the second liner section after the second liner section is separated from the first liner section, each end cap comprising a structure for coupling with the opposite end cap for securing the end caps together when assembled over the liner section.
15. A method of collecting soil samples, comprising the steps of:
providing a soil sample liner comprising at least first and second liner sections positioned end-to-end in a linear array, said liner sections each having a cylindrical sidewall and open ends, said first liner section having an access opening formed in the sidewall thereof for providing access to a soil sample contained therein without disturbing a soil sample contained in said second liner section, and a shrink-wrap material covering said liner sections and holding said liner sections together as an assembled unit;
collecting a core soil sample within said soil sample liner; and
screening the soil sample contained within said first liner section by piercing said shrink-wrap material covering said access opening, removing some soil from within said first liner section through said access opening to form a headspace, and inserting an analytical probe tip through said access opening into said headspace to measure contamination in the headspace air.
16. The method according to claim 15 , further comprising the steps of:
removing the shrink-wrap material from the soil sample liner; and
placing first and second end caps over the ends of said second liner section and forming a compression seal at each end of the second liner section to prevent loss of volatiles from the soil sample contained therein.
17. The method according to claim 15 , wherein a plurality of liner sections having access openings formed therein are provided at spaced locations along a length of the soil sample liner, and said screening step is performed at multiple locations along the length of the soil sample liner.
18. The method according to claim 17 , further comprising the steps of:
removing the shrink-wrap material from the soil sample liner; and
placing end caps over the ends of selected liner sections which do not have access openings formed therein to prevent loss of volatiles from the soil samples contained within the selected liner sections while the soil samples are transported to a laboratory for further testing.
19. The method according to claim 17 , wherein said plurality of liner sections having access openings are made of transparent material to allow visual inspection of the soil sample contained therein without disturbing an integrity of the soil sample.
20. The method according to claim 15 , wherein said second liner section has an interior volume corresponding to a mass of soil required for a standard test, and further comprising the step of extruding substantially all of the soil sample from the second liner section for said test without subsampling.