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TPH 418.1

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					TPH METHOD
   418.1
         Michaelle Exhume
Environmental Testing Laboratories, Inc.
          Mentor: Patty Els
        Freeport High School
               VOCABULARY
• EPA - Environmental Protection Agencies
• Solvent – a substance that is capable of
  dissolving another substance
• Freon – nonflammable gaseous liquid
• Hexane – a colorless flammable liquid used as a
  solvent and as a working fluid in low
  temperature thermometers.
• Silica Gel- a porous form of silica that is highly
  absorbent
• MS- Matrix Spike
• MSD- Matrix Spike Duplicate
             …CONTINUED
• Spectrophotometer – an instrument used for
  measuring the intensity of light of a definite
  wavelength transmitted by a substance or a
  solution, thus providing a measure of the
  amount of material in the solution absorbing
  the light.
• VOA
                        Introduction
• What is TPH 418.1?
  It is defined as the measurable amount of petroleum-based
  hydrocarbons in an environmental media. Since it is a measured,
  gross quantity without identification of its elements, the TPH value
  still represents a mixture. Therefore, TPH itself is not a direct risk to
  humans and the environment
• Most of the samples used are collected soils and groundwater from
  construction sites
• This method is used to find the percentage of petroleum
  hydrocarbons
• This test is important because it is required by the EPA periodically
  every year.
             OBJECTIVE
• To find the percentage of petroleum
  hydrocarbons in the given samples.
                      Materials
•   VOA
•   Sonicator
•   Soil Samples
•   Silica Gel
•   Digital Weighing Scale
•   Spatula
•   Freon
•   Spectrophotometer
•   Pipette
•   Cuvette
•   Glass Wool
•   Florossil
                   Procedure
                     TPH 418.1
1.   Weigh approximately 10 grams of soil sample into a
     VOA
       *Blank 10 grams of sand
       *MS          “
       *MSD         “
2.   Add 3 grams of silica gel to each VOA.
3.   Add 20 ml of Freon
4.   Spike the MS, and MSD with .2 ml of 10,000 ppm TPH
     spike solution
                  …CONTINUED
5.   Sonicate for 20 minutes
6.   Let it cool and settle for
     about 15 minutes
7.   Filter the sample through a
     glass pipette with Florossil
     and glass wool
8.   Place the filtered sample in
     spectrophotometer
9.   Calculate the results using
     the following formula:
     conc Ug/mL *vol ml/wt (gm)
     = final conc PPM
                   RESULTS
COC          VOL   WEIGHT   ABS     TS     Ug/mL
0506408-3    20    10.48     .034   .895    28.89
0506408-4    20    10.17    -.007   .986     3.12
0506408-5    20    10.09      .01   .944    13.80
0506408-5DUP 20    10.09     .009   .944    13.17
0506408-6    20    10.19     .037   .886    30.78
0506408-7    20    10.32    -.005   .527     4.37
0506414-1    20    10.69     .722   .833   461.42
0506414-2    20    10.63     .789   .829   503.54
0506414-3    20    10.26     .639   .848   409.24
0506492-1    20    10.62    -.004   .895     5.00
0506492-2    20    10.62     .012   .748    15.06
0506492-3    20    10.55     .207   .893   137.65
                  …continued
COC         VOL    WEIGHT   ABS     TS     Ug/mL
0507078-2   20     10.62    1.036   .898   658.83
0507080-2   20     10.20     .556   .911   357.06
0507087-1   20     10.07     .136   .822   93.02
0507087-2   20     10.04     .007   .906   636.20
BLANK       20     10.55        0      1    7.52
BLANK MS    20     10.84     .208      1   144.57
BLANK MSD   20     10.82     .217      1   143.94
         CONCLUSION


This project illustrates that the TPH
method 418.1 can be used to find out the
percentage of hydrocarbons in a highly
contaminated soil sample.
          FUTURE WORK
• Since Freon and hexane are extraction
  solvents that evaporate quickly, new
  methods will be examined to try to find an
  easier and cheaper way to decontaminate
  a large portion of highly contaminated
  soil.
             REFERENCES
•   www.dictionary.reference.com/freon
•   www.dictionary.reference.com/hexane
•   www.dictionary.reference.com/solvent
•   www.phaseonline.com
•   The Great Big Book of Chemistry
•   SOP methods
•   TPH method 418.1 book
       ACKNOWLEDGEMENTS

•   Dr. Sat Bhattacharya
•   Harlem Children Society
•   Mr. Edward Irwin
•   Patty Els
•   Robin Knappe
•   Suni Varghese
•   Lisa Maurino


                              Thank you

				
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posted:9/25/2012
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