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On the other hand these investigations , together with those of projects B4 , C1 ( ecotoxicological evaluation by means of biotests ) , C6 ( guidelines for dealing with contaminated sites ) , and D7 ( changes in soils caused by biological remediation ) , lead to needed information about the applicability , useful modifications and combination of the remediation procedures mentioned above . Our versatile and innovative courses offer the chance to study for diplomas , degrees , technical qualifications and doctorates in fields as diverse as humanities , social sciences , medicine , experimental science and engineering . See United States v. P. 35 ( c ) , which authorizes a sentencing court to correct any arithmetical , technical , or other clear errors in sentencing within 7 days after imposing the sentence . An ecotoxicological concept for contaminated soil was developed , consisting of three groups of test methods : A direct investigation of soil material with bioassays , elutriate testing using aquatic bioassays for assessing groundwater risks , and a description of microbial soil populations . Leaching procedures for organic contaminants , which have been done so far , have not given any satisfying results because essential factors like ground structure , texture class , poresize distribution etc ., were not considered during the tests .