I carried out US-EPA 1311 methods on soil which is 100 % solid, the hazardous nature of this soil will be estimated through concentration (mg/L) leached in extraction fluid or the amount leached per gram (ug/g) of soil ?
From the U.S. Environmental Protection Agency Site ( ,http://www.epa.gov/wastes/hazard/testmethods/faq/faq_tclp.htm#TCLP ) an answer of agiven question can hlep you to solve your problem as :
Total Constituent Analysis Instead of TCLP Analysis
Question: Is it acceptable to perform a total constituent analysis instead of a TCLP analysis and then divide the total concentration by 20 to determine if a waste is non-hazardous, as is implied in Section 1.2 of Method 1311, TCLP?
Answer: Section 1.2 of the TCLP does allow for a total constituent analysis in lieu of the TCLP extraction. If a waste is 100% solid, as defined by the TCLP method, then the results of the total constituent analysis may be divided by twenty to convert the total results into the maximum leachable concentration. This factor is derived from the 20:1 liquid-to-solid ratio employed in the TCLP. If a waste has filterable liquid, then the concentration of the analyte in each phase (liquid and solid) must be determined. The following equation may be used to calculate this value:
[A x B] + [C x D]
___________________ = E
B + [20 (L/kg) x D]
Where:
A = Concentration of the analyte in liquid portion of the sample (mg/L)
B = Volume of the liquid portion of the sample (L).
C = Concentration of the analyte in solid portion of the sample (mg/kg)
D = Weight of the solid portion of the sample (kg)
E = Maximum theoretical concentration in leachate (mg/L)
The value obtained (E) can be used to show that the maximum theoretical concentration in a leachate from the waste could not exceed the concentration specified in the toxicity characteristic (TC) (40 CFR 261.24).
In addition, if the total constituent analysis results themselves are below the TC limits without dividing by 20, then the same argument holds true, i.e., the maximum theoretical concentration in the leachate could not exceed the TC limits.
You should look into 40 CFR 261.24, which is the table of Toxicity Characteristic. The maximum values are given in mg/L.
Thank you Sir for your kind response to my query. I will take into consideration all the points mention in these answers
According to formula of TCLP 1311 method, it is mg/L. But if someone writes mg/kg also correct as every liquid has specific gravity.
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