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"�rom time to time; a�cording to the c�iteria set forth in the rules." The list ofprioritiES and t�e rules <br />promulgated pursuant to this subdivision: <br />shail be based tipon �l�e relative risk or danger to public heal�h or welfare or t�ie <br />environment, taking into �ccount to the e�teni possible the popuTation at risk, the <br />hazardous potential of the hazardous substances at the facilities, the potential %r <br />contamination of drinking water supplies, the potential for direct hurzzan contact, the <br />potential for destruction of sensitive ecosystems, the administrativ� and financial <br />capabilities of the [MPCA], and other appropriate factors. <br />Mintz. R. Ch. 7044 includes the MPCA ru�es created pt�rsuant to Minn. Stat. § 11 SB.17, subc�. <br />�3. As will be seen, however, while Chapter 7044 estahlishes how it is tk�at the MPCA rvill create <br />and maintain the PLP, it is silent in terms of explaining exactly how it is that the MPCA uses these <br />rules (if at all) to "authorize" pre-�lpril 1, � 982 response actions under l�inn. Stat. § 115B. I 7, subd. <br />12. Indeed, Minn. R. 7044.0100 ("Scope") says nothing about providing guidance for such <br />authorizations. Instiead, the "scape" ofthe Chapter 7044 rules is to estab�is� release classificaiions, <br />to ciescribe ihe procedures for the creation and rriaintenar�ce of the state's Perrnanenti List of Priarf ties <br />and ProJect List, fo establisl� fi�nding priorities for the Project List and ta specify a ranking system to <br />be usec� in scoring sites. 1Vlinn. R. 7044.0100. FurChermore, the rules leave many gaps about, e.g., <br />what the MPCA does w�th a site's HRS ranking and what criteria it uses to class�fy releas�s or <br />threatened releases. <br />The MPCA does not have an� objective standards that it uses when it considers a cIeanup <br />autharization under subdivision 12. The few MPCA subdivision 12 authorizations that exist <br />typically lack at lot of detai� or rationale. <br />Y`ractical Considerations <br />Any consideration af efforts to compel past or current parties ta pay for historical or ongoing <br />contamination is tied to the ability ta identify past or current polluters who have viable assets or <br />funding. Tf�e information provided to us suggests that Tndianhead Trucking was a prior owner for a <br />significant portion of the l�osevilie Twin Lakes Redevelo�ment Area. We have not checked inta the <br />historical records closely, but we believe that Indianhead has long ago filed for bankruptcy and is <br />defu�ct. We are unaware that Indianhead has any viable successors who assuined Tndianhead's <br />liability. Thus, evidence that might tie exrsting conta��ination to prior activities of Indianhead will <br />not, as a practical inatter; support claims either for cost recovery or injunctive reIief. <br />On the other hand, r�vhere various hazardous substances or wastes have become commingled, <br />ane party can be cal�ed upon to pay j ointly and several�y for an entire liability, �.inless the polluier can <br />establish t1�e divisibility of its awn releases. So, if the evidence establi5hes that there are viable <br />parties wha are responsible for past or ongaing releases, those parties might be ca�Ied upan to p�y far <br />more than their share of liability. A lon�-standing debate in environmental law relates to <br />responsibility far "orphan shares," that is, those shares attributable to defunct parties. There are <br />some cases that suggest that a p�aintiff bears responsibility for such shares, but ther� has been <br />considerai��e re-shuffling of the case law by recent United States Supreme Court cases and those <br />cases couId lead to re-examination of the "or�han share" allocation. <br />7 <br />