Xextex testingX-TEX Sorbent’s Impact on the Environment

Introduction -  Sorbents used in the environment should be environmentally benign. A standard test of potential environmental harm is the Toxicity Characteristics Leachate Procedure (TCLP test), which measures the concentration of chemicals of concern released into the environment from solid substances.

Method -  X-TEX sorbent material was submitted to an analytical laboratory with NELAP (National Environmental Laboratory Accreditation Program) accreditation for the full suite of TCLP analyzes. The results of the tests are summarized below.

Results

Volatile Organic Compounds / EPA Method 1311 / 8260B

Parameter
Result
Detection Limit
Units
Maximum Contaminant Level

Vinyl Chloride

ND

0.2

mg/L

0.2

1,1-Dichloroethene

ND

0.2

mg/L

0.7

2-Butanone

ND

1

mg/L

200

Chloroform

ND

0.2

mg/L

6.0

Carbon Tetrachloride

ND

0.2

mg/L

0.5

Benzene

ND

0.2

mg/L

0.5

1,2-Dichloroethane

ND

0.2

mg/L

0.5

Trichloroethene

ND

0.2

mg/L

0.5

Tetrachloroethene

ND

0.2

mg/L

0.7

Chlorobenzene

ND

0.2

mg/L

100

RCRA Metals / EPA Method 1311 / 6010  / 7470

Parameter
Result
Detection Limit
Units
Maximum Contaminant Level

Arsenic

ND

0.2

mg/L

5.0

Barium

0.25

0.005

mg/L

100

Cadmium

ND

0.05

mg/L

1.0

Chromium

ND

0.01

mg/L

5.0

Lead

ND

0.1

mg/L

5.0

Selenium

ND

0.5

mg/L

1.0

Silver

ND

0.2

mg/L

5.0

Mercury

ND

0.002

mg/L

0.2

Chlorinated Pesticides / EPA Method 1311 / 8081

Parameter
Result
Detection Limit
Units
Maximum Contaminant Level

gamma-BHC (Lindane)

ND

0.001

mg/L

0.4

Heptachlor

ND

0.001

mg/L

0.008

Heptachlor epoxide

ND

0.001

mg/L

0.008

Endrin

ND

0.002

mg/L

0.02

Methoxychlor

ND

0.01

mg/L

10

Chlordane (technical)

ND

0.01

mg/L

0.03

Toxaphene

ND

0.1

mg/L

0.5

Chlorinated Herbicides / EPA Method 1311 / 8151

Parameter
Result
Detection Limit
Units
Maximum Contaminant Level

2,4-D

ND

0.001

mg/L

10

Silvex (2,4,5-TP)

ND

0.001

mg/L

1.0

Semivolatile Organic Compounds / EPA Method 1311 / 8270C

Parameter
Result
Detection Limit
Units
Maximum Contaminant Level

1,4-Dichlorobenzene

ND

0.005

mg/L

7.5

2-Methylphenol

ND

0.005

mg/L

200

3- & 4-Methylphenol

ND

0.005

mg/L

200

Hexachloroethane

ND

0.005

mg/L

3.0

Nitrobenzene

ND

0.005

mg/L

2.0

Hexachlorobutadiene

ND

0.005

mg/L

0.5

2,4,6-Trichlorophenol

ND

0.005

mg/L

2.0

2,4,5-Trichlorophenol

ND

0.005

mg/L

400

2,4-Dinitrotoluene

ND

0.005

mg/L

0.13

Hexachlorobenzene

ND

0.005

mg/L

0.13

Pentachlorophenol

ND

0.005

mg/L

100

Pyridine

ND

0.005

mg/L

5.0

Conclusions -  All parameters were well below the limits required by the test, showing that the Xextex sorbent material does not contribute to pollution of the environment.

The Xextex Corporation, USA

Jerry M. Brownstein
President & CEO
70 East Sunset Way #188
Issaquah, WA 98027

Phone: (425) 392.3848
Fax: (425) 392.0222
Email: jbxextex@comcast.net

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