Welcome to the Department of Toxic Substances Control

Final Decision to Certify Hazardous Waste Environmental Technology


Dionex Corporation

Accelerated Solvent Extraction Using ASE 200TM Extractor


The California Environmental Protection Agency, Department of Toxic Substances Control (DTSC) has made a final decision to certify the following company's hazardous waste environmental technology.

Dionex Corporation Accelerated Solvent Extraction Using ASE 200 Extractor Chapter 412, Section 25200.1.5, Health and Safety Code, enacted by Assembly Bill 2060, Weggeland 1993, authorizes the DTSC to certify the performance of hazardous waste environmental technologies. Only technologies that are determined not to pose a significant potential hazard to the public health and safety or to the environment when used under specified operating conditions may be certified. Incineration technologies are explicitly excluded from the certification program. The purpose of the certification program is to provide an in-depth, independent review of technologies at the manufacturer's level to facilitate regulatory and end-user acceptance and to promote and foster growth of California's environmental technology industry.

DTSC makes no expressed or implied warranties as to the performance of the manufacturer's product or equipment. The end user is solely responsible for complying with the applicable federal, state, and local regulatory requirements. Certification does not limit DTSC's authority to require additional measures for protection of the public health and the environment.

By accepting certification, the manufacturer assumes, for the duration of certification, responsibility for maintaining the quality of the manufactured equipment and materials at a level equal or better than was provided to obtain certification and agrees to be subject to quality monitoring by DTSC as required by the statute under which certification is granted.

DTSC's notice of intent to certify was published on August 29, 1997, in the California Regulatory Notice Register, Volume 97, No. 35-Z, pgs. 1688-1689. No comments in relation to the proposed certification were received during the public review and comment period. DTSC's final certification shall become effective on November 17, 1997.

Additional information supporting DTSC's final certification decision is available for review at:

California Environmental Protection Agency
Department of Toxic Substances Control
Office of Pollution Prevention and Technology Development
P.O. Box 806, 301 Capitol Mall, lst Floor
Sacramento, CA 95812-0806
Attn: Dr. Wolfgang Fuhs (510) 540-3076

A description of the technology to be certified, the certification statement, and the certification limitations for the technology of the company listed above follows.

 

CERTIFICATION PROGRAM (AB 2060)
FOR
HAZARDOUS WASTE
ENVIRONMENTAL TECHNOLOGIES

 

FINAL NOTICE OF CERTIFICATION

TECHNOLOGY
Dionex Corporation Accelerated Solvent Extraction Using ASE 200 Extractor

APPLICANT
Dionex Corporation, Sunnyvale, California

 

Technology: Accelerated Solvent Extraction Using ASE 200 Extractor
Manufacturer: Dionex Corporation
Sunnyvale, CA 94089
Tel. (408) 737-8522

Technology Description and Specifications

Accelerated solvent extraction (ASE) is a technology for use in environmental analytical laboratories. It uses U.S. EPA recommended or Dionex-specified alternate solvents at elevated temperatures and pressures to achieve the efficient removal of analytes from solid matrices in a relatively short period of time with less solvent than the conventional sample extraction methods. The combination of elevated temperature and pressure enhances the extraction efficiency by affecting contaminant solubility and mass transfer from the sample matrix. The accelerated solvent extraction system is applicable to the extraction of water insoluble or slightly water soluble organic pollutants in preparation for gas chromatographic or GC/MS analysis. The high temperatures and pressures used in ASE achieve an extraction efficiency equivalent to Soxhlet extraction for many of the target analytes listed in the Contract Laboratory Program's Target Contaminant List (semivolatile acid, basic, neutral compounds, and chlorinated pesticides), organophosphorus pesticides, chlorinated herbicides, and polychlorinated biphenyls. No chemical changes or thermal degradations were found to be associated with the high temperatures and pressures used in the ASE system. If used appropriately and in accordance with manufacturer's instructions, the ASE technology provides environmental benefits relative to current extraction methods.

Dionex has published encouraging data for the extractions of polychlorinated dibenzo (p) dioxins and dibenzofurans and volatile organics. From these data it would appear that ASE can be used effectively for extractions of dioxins as well. However, evaluating these results was beyond the scope of this certification.

Certification Statement

Under the authority of Section 25200.1.5 of the California Health and Safety Code, the Department hereby certifies the Dionex ASE 200 system as a Measurement Technology for the extraction of priority pollutants including basic, neutral, and acidic semivolatiles, chlorinated pesticides, organophosphorus pesticides, chlorinated herbicides, and chlorinated biphenyls from soils for chemical analysis.

Basis for Decision

The certification decision is based on extensive documentation of in-house development, several critical independent studies, and user evaluations of the technology. A listing of documents that were available for this evaluation is contained in the Evaluation Report which forms the basis for this certification.

Limitations of Certification

DTSC makes no express or implied warranties as to the performance of the manufacturer's product or equipment. The end-user is solely responsible for complying with the applicable federal, state, and local regulatory requirements. Certification does not limit DTSC's authority to require additional measures for protection of the public health and the environment.

This certification is subject to the conditions set out in the regulations to be adopted pursuant to Section 25200.1.5 of the California Health and Safety Code, such as the duration of the certification, the continued monitoring and oversight requirements, and the procedure for certification amendments, including decertification.

By accepting certification, the manufacturer assumes, for the duration of certification, responsibility for maintaining the quality of the manufactured equipment and materials at a level equal or better than was provided to obtain certification and agrees to be subject to quality monitoring by DTSC as required by the statute under which certification is granted.

Regulatory Implications

DTSC's certification does not change the regulatory status of a technology; it is intended, however, to facilitate and encourage the acceptance of a technology where a project's data quality objectives can be met by its use. State and local regulatory authorities are encouraged to take this certification under consideration when making their permitting decisions. Specifically, the Accelerated Solvent Extraction System certified here has been accepted by the U.S. EPA Office of Solid Waste into the SW-846 compendium of methods and, by this certification, is approved for use in California-certified environmental laboratories.


 
 
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