According to § 5 TMG:

Dr. Kostka-Rick – Biologisch Überwachen und Bewerten
Dr. Reinhard Kostka-Rick
Langwiesenstr. 41
70771 Leinfelden-Echterdingen


phon:  +49 711 79 78 803
fax:   +49 711 78 46 381


VAT identification number according to §27 a sales tax law:
DE 164 129 782

Responsible for the content according to §55(2) RStV:

Dr. Reinhard Kostka-Rick
Langwiesenstr. 41
70771 Leinfelden-Echterdingen

Information on professional liability insurance:

Name and registered office of the company:
ERGO insurance
40198 Dusseldorf
Scope of insurance: Europe



Liability for content

The contents of these pages were created with the utmost care. However, we cannot accept any liability for the accuracy, completeness and topicality. As a service provider we are responsible according to § 7 (1) TMG for our own content on these pages according to the general laws. However, according to §§ 8 to 10 TMG, we as service providers are not obligated to monitor transmitted or stored foreign information or to investigate circumstances that indicate an illegal activity. Obligations to remove or block the use of information in accordance with the general laws remain unaffected.
However, liability in this respect is only possible from the moment of knowledge of a concrete infringement. We will correct this content immediately upon becoming aware of any such violations.

Liability for Links

Our offer contains links to external websites of third parties, on whose contents we have no influence. Therefore, we cannot accept any liability for these external contents. For the contents of the linked pages is always the respective provider or operator of the relevant pages. The linked pages were checked for possible violations of the law at the time of linking. Illegal contents were not recognizable at the time of linking. However, a permanent control of the content of the linked pages is not reasonable without concrete evidence of a violation of the law.


The content and works created by the site operators on these pages are subject to German copyright law. The duplication, processing, distribution and any kind of exploitation outside the limits of copyright law require the written consent of the respective author or creator. Downloads and copies of this site are only permitted for private, non-commercial use. As far as the content on this site has not been created by the operator, the copyrights of third parties are respected. In particular, contents of third parties are marked as such. Should you nevertheless become aware of a copyright infringement, we ask for an appropriate notice. If we become aware of violations, we will correct such content immediately.

Privacy policy:

Data collection during visiting our website

personal data. In the purely informational use of our website we only receive data that your browser transmits to our server by default (so-called "server LogFiles"). Processing is carried out in accordance with article 6 (1) lit. f DSGVO based on our legitimate interest in maintaining our website, thus ensuring functionality and stability. When you visit our website, we store the following data that is technically necessary for us to display the website:

  • our visited webpage
  • date and time of access
  • amount of data sent in byte
  • source / reference of the page you came from
  • used browser
  • used operating system
  • IP address (if applicable: in anonymised form)

  • No passing on or other use of the data takes place. However, we reserve the right to check the server logfiles retrospectively, should give specific indications of illegal use.

    As far as you enter personal data (e.g. name, address or e-mail addresses) on our pages, this is always done on a voluntary basis. These data are stored and used solely for the purpose of processing your request or for establishing contact and the associated technical administration.The legal basis for the processing of the data is our mutual interest in answering your questions in accordance with article 6 (1) lit. f DSGVO. If its contact is aimed at concluding a contract, additional legal basis for processing is article 6 (1) lit. b DSGVO. Your data will be deleted after the final processing of your request after a reasonable period of time. This is the case if it is clear from the circumstances that the facts in question are conclusively clarified and that there is no legal obligation to retain them. We would like to point out that data transmission on the Internet (e.g. when communicating via e-mail) can have security gaps. A complete protection of the data from access by third parties can therefore not be guaranteed.

    Deletion of the data

    According to DSGVO you can demand the deletion of all data stored from you. In this case, it will be impossible to provide services for you or to communicate with you beyond deletion.

    Data collection by third parties

    The use of our contact data, which are also published within the framework of the imprint obligation, by third parties for the transmission of not expressly requested advertising and information material is hereby expressly contradicted. The website operator expressly reserves the right to take legal action in the event of an infringement, for example in the case of unsolicited sending of advertising information through spam mails.