Sampling Trace‐Level Organic Solutes with Polymeric Tubing Part I. Static Studies

Parker, Louise V.; Ranney, Thomas A.

doi:10.1111/j.1745-6592.1997.tb01271.x

Cited by 21 publications

(16 citation statements)

References 12 publications

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“…Once a chemical is sorbed onto a material, it can be desorbed or remain on or in the material. Flexible polyurethane, polyamide, and PVC desorb most of the sorbed chemical compared with PTFE, PP, nylon, PE (Parker and Ranney 1997) and LDPE (Topp and Smith 1992). In addition, the sorbed chemical may diffuse through the material and reach the other side of the material.…”

Section: Methodsmentioning

confidence: 99%

Collecting large soil monoliths

Allaire¹,

Bochove²

2006

Can. J. Soil. Sci.

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Allaire, S. A. and van Bochove, E. 2006. Collecting large soil monoliths. Can. J. Soil Sci. 86: 885-896. Large soil monoliths (> 50 kg) are required to study and monitor soil energy and water budget, gas and liquid fluxes, and contaminant transport. This paper reviews the types of studies requiring large soil monoliths, design and material for the casing, and collection methods for vertically forced cylindrical and for block (orthorhombic) monoliths. Methods of extraction are described along with recommendations. Advantages and disadvantages of each method are discussed. Vertically pushed cylindrical monoliths are easier to sample, but compared with orthorhombic monoliths that are not pushed into the soil, the pushing process has the disadvantage of modifying certain soil physical properties.

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Section: Methodsmentioning

confidence: 99%

Collecting large soil monoliths

Allaire¹,

Bochove²

2006

Can. J. Soil. Sci.

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“…The stabilization period is designed to allow the well itself, and the equipment installed to chemically equilibrate with the surrounding formation water. Previous research (Parker and Ranney 1997 shows that new plastics can sorb contaminants and thus could bias results if not equilibrated. Pre-deployment of the sensors, pumps, samplers will limit potential bias from new materials in the equipment.…”

Section: Installation Of New Wellsmentioning

confidence: 99%

An Assessment of Aquifer/Well Flow Dynamics: Identification of Parameters Key to Passive Sampling and Application of Downhole Sensor Technologies

Sanford¹,

Martin-Hayden²,

Plummer³

2014

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Distribution Statement A REPORT DOCUMENTATION PAGEForm Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. (From -To) REPORT DATE (DD-MM-YYYY) 07-11-2014 REPORT TYPE Draft Final Report DATES COVERED SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) Strategic Environmental Research and Development Program 4800 MARK CENTER DRIVE, SUITE 17D08ALEXANDRIA VA 22350-3600 SERDP SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release; distribution is unlimited SUPPLEMENTARY NOTES ABSTRACTContaminant redistributive effects in wells are nearly always present. Complete mixing appears to be very common; however, it is not universal. There is a continual balance between inflowing contaminant stratification (where present) and factors driving in-well mixing. Findings here imply common and very small drivers are responsible for slow but vigorous mixing relative to the residence time of water flowing through a typical well screen. Therefore, a tendency toward homogenization is anticipated to be common in field conditions. Most wells should experience strong redistribution effects, but some wells may maintain stratification or perhaps re-stratify differently from the surrounding formation. Ongoing technical transfer of these findings will promote better understanding in the environmental community that wells often represent a mixed flow-weighted average of the adjacent formation chemistry. This better understanding will yield cost savings in both short-term and long-term timeframes by accelerating the approval process for non-purge alternative sampling strategies, including passive sampling and in situ sensor technologies. SUBJECT TERMSGroundwater monitoring, passive sampling, purging,

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“…In contrast, the PE pump had not been placed in the well until the day before the sampling event. Previous studies by our laboratory (Parker et al 1990;Parker and Ranney 1994, 1997, 1998 have shown that TCE is readily sorbed by the polymeric materials used in bladder pump systems (e.g., fluorinated ethylene propylene [FEP]), and that losses are greater at lower flow rates and with longer lengths of tubing. This assumption (that differences in concentrations may be the result of differences in sorption that resulted from differences in the materials used and equilibration times) is borne out by the fact that the differences between the concentrations were less with each sampling event.…”

Section: Sampling Studiesmentioning

confidence: 99%

Use of Small-Diameter Bladder Pumps in Direct-Push Ground Water Monitoring Wells at the CRREL Site

Parker¹,

Govoni²,

Stutz³

2004

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Several different small-diameter (1/2-inch and 3/4-inch) bladder pumps (from different manufacturers) were tested in 1/2-inch and 3/4-inch direct-push (DP) monitoring wells at the CRREL site in Hanover, New Hampshire. Obtaining a sample at this site has been challenging because the depth to ground water is over 100 feet and thus substantial lift is required to bring the water to the surface. Although the different brands of pumps fit into the small-diameter wells, all of them hung up in some of the wells when attempting to install them at the sampling depth. However, it was found that machining a few thousandths of an inch off the diameter of the pumps was all that was necessary to get them to the desired depth. Three brands of 3/4-inch bladder pumps were tested in the site's DP wells and delivered between 25 and 315 mL/min. Two brands of 1/2-inch bladder pumps were tested and delivered between 20 and 100 mL/min. Concentrations of TCE obtained using two different brands of a 3/4-inch diameter pump were compared and statistically significant differences were found. The same was true when the same two brands of 1/2-inch diameter pumps were compared, although the differences in this case were slight. It is believed that differences in the previous conditioning the pumps received in the wells (i.e., equilibration times for the materials with the well water) were responsible for much of these differences.

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Sampling Trace‐Level Organic Solutes with Polymeric Tubing Part I. Static Studies

Cited by 21 publications

References 12 publications

Collecting large soil monoliths

Collecting large soil monoliths

An Assessment of Aquifer/Well Flow Dynamics: Identification of Parameters Key to Passive Sampling and Application of Downhole Sensor Technologies

Use of Small-Diameter Bladder Pumps in Direct-Push Ground Water Monitoring Wells at the CRREL Site

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