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(continued)
(iii) If there is a reasonable basis for dividing the assessment, the natural resource trustee may act independently and pursue separate assessments, actions, or claims so long as the claims do not overlap. In these instances, the natural resource trustees shall coordinate their efforts, particularly those concerning the sharing of data and the development of the Assessment Plans.
(2) Identification and involvement of the potentially responsible party. (i) If the lead agency under the NCP for response actions at the site has not identified potentially responsible parties, the authorized official shall make reasonable efforts to identify any potentially responsible parties.
(ii) In the event the number of potentially responsible parties is large or if some of the potentially responsible parties cannot be located, the authorized official may proceed against any one or more of the parties identified. The authorized official should use reasonable efforts to proceed against most known potentially responsible parties or at least against all those potentially responsible parties responsible for significant portions of the potential injury.
(iii)(A) The authorized official shall send a Notice of Intent to Perform an Assessment to all identified potentially responsible parties. The Notice shall invite the participation of the potentially responsible party, or, if several parties are involved and if agreed to by the lead authorized official, a representative or representatives designated by the parties, in the development of the type and scope of the assessment and in the performance of the assessment. The Notice shall briefly describe, to the extent known, the site, vessel, or facility involved, the discharge of oil or release of hazardous substance of concern to the authorized official, and the resources potentially at risk. The Notice shall also contain a statement of authority for asserting trusteeship, or co-trusteeship, over those natural resources identified as potentially at risk.
(B) The authorized official shall allow at least 30 calendar days, with reasonable extensions granted as appropriate, for the potentially responsible party or parties notified to respond to the Notice before proceeding with the development of the Assessment Plan or any other assessment actions.
(b) Plan approval. The authorized official shall have final approval as to the appropriate methodologies to include in the Assessment Plan and any modifications to the Assessment Plan.
(c) Public involvement in the Assessment Plan. (1) The authorized official must make the Assessment Plan available for review by any identified potentially responsible parties, other natural resource trustees, other affected Federal or State agencies or Indian tribes, and any other interested member of the public for a period of at least 30 calendar days, with reasonable extensions granted as appropriate. The authorized official may not perform any type B procedures described in the Assessment Plan until after this review period.
(2) Any comments concerning the Assessment Plan received from identified potentially responsible parties, other natural resource trustees, other affected Federal or State agencies or Indian tribes, and any other interested members of the public, together with responses to those comments, shall be included as part of the Report of Assessment, described in §11.90 of this part.
(d) Plan implementation. At the option of the authorized official and if agreed to by any potentially responsible party, or parties acting jointly, the potentially responsible party or any other party under the direction, guidance, and monitoring of the authorized official may implement all or any part of the Assessment Plan finally approved by the authorized official. Any decision by the authorized official to allow or not allow implementation by the potentially responsible party shall be documented in the Assessment Plan.
(e) Plan modification. (1) The Assessment Plan may be modified at any stage of the assessment as new information becomes available.
(2)(i) Any modification to the Assessment Plan that in the judgment of the authorized official is significant shall be made available for review by any identified potentially responsible party, any other affected natural resource trustees, other affected Federal or State agencies or Indian tribes, and any other interested members of the public for a period of at least 30 calendar days, with reasonable extensions granted as appropriate, before tasks called for in the modified plan are begun.
(ii) Any modification to the Assessment Plan that in the judgment of the authorized official is not significant shall be made available for review by any identified potentially responsible party, any other affected natural resource trustees, other affected Federal or State agencies or Indian tribes, and any other interested members of the public, but the implementation of such modification need not be delayed as a result of such review.
(f) Plan review. (1) After the Injury Determination phase is completed and before the Quantification phase is begun, the authorized official shall review the decisions incorporated in the Assessment Plan.
(2) The purpose of this review is to ensure that the selection of methodologies for the Quantification and Damage Determination phases is consistent with the results of the Injury Determination phase, and that the use of such methodologies remains consistent with the requirements of reasonable cost, as that term is used in this part.
(3) Paragraphs (f)(1) and (f)(2) of this section do not apply to the use of a type A procedure.
[51 FR 27725, Aug. 1, 1986, as amended at 53 FR 5174, Feb. 22, 1988; 59 FR 14282, Mar. 25, 1994; 61 FR 20609, May 7, 1996]
§ 11.33 What types of assessment procedures are available?
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There are two types of assessment procedures:
(a) Type A procedures are simplified procedures that require minimal field observation. Subpart D describes the type A procedures. There are two type A procedures: a procedure for coastal or marine environments, which incorporates the Natural Resource Damage Assessment Model for Coastal and Marine Environments, Version 2.51 (NRDAM/CME); and a procedure for Great Lakes environments, which incorporates the Natural Resource Damage Assessment Model for Great Lakes Environments, Version 1.51 (NRDAM/GLE).
(b) Type B procedures require more extensive field observation than the type A procedures. Subpart E describes the type B procedures.
[61 FR 20610, May 7, 1996, as amended at 62 FR 60459, Nov. 10, 1997; 65 FR 6014, Feb. 8, 2000]
§ 11.34 When may the authorized official use a type A procedure?
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The authorized official may use a type A procedure only if:
(a) The released substance entered an area covered by the NRDAM/CME or NRDAM/GLE. Section 3.4, Volume III of the NRDAM/CME technical document (incorporated by reference, see §11.18) identifies the areas that the NRDAM/CME covers. Section 6.2, Volume III of the NRDAM/GLE technical document (incorporated by reference, see §11.18) describes the areas that the NRDAM/GLE covers;
(b) The NRDAM/CME or NRDAM/GLE cover the released substance. Table 7.1, Volume I of the NRDAM/CME technical document lists the substances that the NRDAM/CME covers. Table 7.1, Volume I of the NRDAM/GLE technical document lists the substances that the NRDAM/GLE covers;
(c) The released substance entered water at or near the surface;
(d) At the time of the release, winds did not vary spatially over the area affected by the release in a way that would significantly affect the level or extent of injuries;
(e) The authorized official is not aware of any reliable evidence that, for species that are likely to represent a significant portion of the claim, the species biomass is significantly lower than the species biomass assigned by the NRDAM/CME or the NRDAM/GLE Tables IV.2.1 through IV.2.115 and IV.5.1 through IV.5.77, Volume III of the NRDAM/CME technical document list the species biomasses in the NRDAM/CME. Tables III.3.17 through III.3.27 and III.3.40 through III.3.50, Volume III of the NRDAM/GLE technical document list the species biomasses in the NRDAM/GLE ; and
(f) Subsurface currents either: are not expected to significantly affect the level or extent of injuries; or are reasonably uniform with depth over the water column in the area affected by the release.
[61 FR 20610, May 7, 1996]
§ 11.35 How does the authorized official decide whether to use type A or type B procedures?
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(a) If the authorized official determines under §11.34 that a type A procedure is available, the authorized official must then decide whether to use that procedure or use type B procedures. The authorized official must make this decision by weighing the difficulty of collecting site-specific data against the suitability of the averaged data and simplifying assumptions in the type A procedure for the release being assessed. The authorized official may use type B procedures if they can be performed at a reasonable cost and if the increase in accuracy provided by those procedures outweighs the increase in assessment costs. Section 1, Volume I of the NRDAM/CME technical document (incorporated by reference, see §11.18) lists the simplifying assumptions made in the NRDAM/CME. Volumes III through IV of the NRDAM/CME technical document list the data in the NRDAM/CME. Section 1, Volume I of the NRDAM/GLE technical document (incorporated by reference, see §11.18) lists the simplifying assumptions made in the NRDAM/GLE. Volume III of the NRDAM/GLE technical document lists the data in the NRDAM/GLE.
(b) The authorized official must use type B procedures rather than a type A procedure whenever a potentially responsible party:
(1) Submits a written request for use of type B procedures along with documentation of the reasons supporting the request; and
(2) Advances all reasonable costs of using type B procedures within a time frame acceptable to the authorized official.
(c) If there is no available type A procedure, the authorized official must use type B procedures to calculate all damages.
(d) Except as provided in paragraph (b) of this section, the authorized official may change the type of procedure used in light of comments received on the Assessment Plan. [See §11.32(e)(2) to determine if the authorized official must provide for additional public review.] However, if the authorized official decides to use type B procedures in lieu of a type A procedure, and cannot confirm exposure under §11.37, the authorized official may not then use a type A procedure.
[61 FR 20610, May 7, 1996]
§ 11.36 May the authorized official use both type A and type B procedures for the same release?
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(a) The authorized official may use both a type A procedure and type B procedures for the same release if:
(1) The type B procedures are cost-effective and can be performed at a reasonable cost;
(2) There is no double recovery; and
(3) The type B procedures are used only to determine damages for injuries or compensable values that do not fall into the categories addressed by the type A procedure. [Sections 11.14(v) and 11.62 define “injury.” Section 11.83(c)(1) defines “compensable value.”]
(b) The type A procedures address the following categories of injury and compensable value:
(1) Direct mortality of species covered by the NRDAM/CME or NRDAM/GLE resulting from short-term exposure to the released substance. Volume IV of the NRDAM/CME technical document (incorporated by reference, see §11.18) lists the species that the NRDAM/CME covers. Section 3, Volume III of the NRDAM/GLE technical document (incorporated by reference, see §11.18) lists the species that the NRDAM/GLE covers;
(2) Direct loss of production of species covered by the NRDAM/CME or NRDAM/GLE resulting from short-term exposure to the released substance;
(3) Indirect mortality of species covered by the NRDAM/CME or NRDAM/GLE resulting from disruption of the food web by direct mortality or direct loss of production;
(4) Indirect loss of production of species covered by the NRDAM/CME or NRDAM/GLE resulting from disruption of the food web by direct mortality or direct loss of production;
(5) Lost assimilative capacity of water column and sediments;
(6) Lost economic rent for lost commercial harvests resulting from any closures specified by the authorized official and/or from population losses;
(7) Lost recreational harvests resulting from any closures specified by the authorized official and/or from population losses;
(8) For the type A procedure for coastal and marine environments, lost wildlife viewing, resulting from population losses, by residents of the States bordering the provinces in which the population losses occurred. [A province is one of the geographic areas delineated in Table 6.1, Volume I of the NRDAM/CME technical document.] For the type A procedure for Great Lakes environments, lost wildlife viewing, resulting from population losses, by residents of local areas bordering the provinces in which the population losses occurred. [A province is one of the geographic areas delineated in Table 8.1, Volume I of the NRDAM/GLE technical document.];
(9) Lost beach visitation due to closure; and
(10) For the type A procedure for Great Lakes environments, lost boating due to closure.
(c) If the authorized official uses both type A and type B procedures, he or she must explain in the Assessment Plan how he or she intends to prevent double recovery.
(d) When the authorized official uses type B procedures for injuries not addressed in a type A procedure, he or she must follow all of subpart E (which contains standards for determining and quantifying injury as well as determining damages), §11.31(c) (which addresses content of the Assessment Plan), and §11.37 (which addresses confirmation of exposure). When the authorized official uses type B procedures for compensable values that are not included in a type A procedure but that result from injuries that are addressed in the type A procedure, he or she need not follow all of subpart E, §11.31(c), and §11.37. Instead, the authorized official may rely on the injury predictions of the type A procedure and simply use the valuation methodologies authorized by §11.83(c) to calculate compensable value. When using valuation methodologies, the authorized official must comply with §11.84.
[61 FR 20610, May 7, 1996]
§ 11.37 Must the authorized official confirm exposure before implementing the Assessment Plan?
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(a) Before including any type B methodologies in the Assessment Plan, the authorized official must confirm that at least one of the natural resources identified as potentially injured in the preassessment screen has in fact been exposed to the released substance.
(b) Procedures. (1) Whenever possible, exposure shall be confirmed by using existing data, such as those collected for response actions by the OSC, or other available studies or surveys of the assessment area.
(2) Where sampling has been done before the completion of the preassessment screen, chemical analyses of such samples may be performed to confirm that exposure has occurred. Such analyses shall be limited to the number and type required for confirmation of exposure.
(3) Where existing data are unavailable or insufficient to confirm exposure, one or more of the analytical methodologies provided in the Injury Determination phase may be used. The collection and analysis of new data shall be limited to that necessary to confirm exposure and shall not include testing for baseline levels or for injury, as those phrases are used in this part.
[51 FR 27725, Aug. 1, 1986. Redesignated and amended at 61 FR 20610, 20611, May 7, 1996]
§ 11.38 Assessment Plan—preliminary estimate of damages.
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(a) Requirement. When performing a type B assessment pursuant to the requirements of subpart E of this part, the authorized official shall develop a preliminary estimate of: the anticipated costs of restoration, rehabilitation, replacement, and/or acquisition of equivalent resources for the injured natural resources; and the compensable value, as defined in §11.83(c) of this part, of the injured natural resources, if the authorized official intends to include compensable value in the damage claim. This preliminary estimate is referred to as the preliminary estimate of damages. The authorized official shall use the guidance provided in this section, to the extent possible, to develop the preliminary estimate of damages.
(b) Purpose. The purpose of the preliminary estimate of damages is for reference in the scoping of the Assessment Plan to ensure that the choice of the scientific, cost estimating, and valuation methodologies expected to be used in the damage assessment fulfills the requirements of reasonable cost, as that term is used in this part. The authorized official will also use the preliminary estimate of damages in the review of the Assessment Plan, as required in §11.32(f) of this part, to ensure the requirements of reasonable cost are still met.
(c) Steps. The preliminary estimate of damages should include consideration of the ability of the resources to recover naturally and, if relevant, the compensable value through the recovery period with and without possible alternative actions. The authorized official shall consider the following factors, to the extent possible, in making the preliminary estimate of damages:
(1) The preliminary estimate of costs of restoration, rehabilitation, replacement, and/or acquisition of equivalent resources should include consideration of a range of possible alternative actions that would accomplish the restoration, rehabilitation, replacement, and/or acquisition of the equivalent of the injured natural resources.
(i) The preliminary estimate of costs should take into account the effects, or anticipated effects, of any response actions.
(ii) The preliminary estimate of costs should represent the expected present value of anticipated costs, expressed in constant dollars, and should include direct and indirect costs, and include the timing of those costs. The provisions detailed in §§11.80–11.84 of this part are the basis for the development of the estimate.
(iii) The discount rate to be used in developing the preliminary estimate of costs shall be that determined in accordance with the guidance in §11.84(e) of this part.
(2) The preliminary estimate of compensable value should be consistent with the range of possible alternatives for restoration, rehabilitation, replacement, and/or acquisition of equivalent resources being considered.
(i) The preliminary estimate of compensable value should represent the expected present value of the anticipated compensable value, expressed in constant dollars, accrued through the period for the restoration, rehabilitation, replacement, and/or acquisition of equivalent resources to baseline conditions, i.e., between the occurrence of the discharge or release and the completion of the restoration, rehabilitation, replacement, and/or acquisition of the equivalent of the injured resources and their services. The estimate should use the same base year as the preliminary estimate of costs of restoration, rehabilitation, replacement, and/or acquisition of equivalent resources. The provisions detailed in §§11.80–11.84 of this part are the basis for the development of this estimate.
(ii) The preliminary estimate of compensable value should take into account the effects, or anticipated effects, of any response actions.
(iii) The discount rate to be used in developing the preliminary estimate of compensable value shall be that determined in accordance with the guidance in §11.84(e) of this part.
(d) Content and timing. (1) In making the preliminary estimate of damages, the authorized official should rely upon existing data and studies. The authorized official should not undertake significant new data collection or perform significant modeling efforts at this stage of the assessment planning phase.
(2) Where possible, the authorized official should make the preliminary estimate of damages before the completion of the Assessment Plan as provided for in §11.31 of this part. If there is not sufficient existing data to make the preliminary estimate of damages at the same time as the assessment planning phase, this analysis may be completed later, at the end of the Injury Determination phase of the assessment, at the time of the Assessment Plan review.
(3) The authorized official is not required to disclose the preliminary estimate before the conclusion of the assessment. At the conclusion of the assessment, the preliminary estimate of damages, along with its assumptions and methodology, shall be included in the Report of the Assessment as provided for in §11.91 of this part.
(e) Review. The authorized official shall review, and revise as appropriate, the preliminary estimate of damages at the end of the Injury Determination and Quantification phases. If there is any significant modification of the preliminary estimate of damages, the authorized official shall document it in the Report of the Assessment.
[59 FR 14282, Mar. 25, 1994. Redesignated at 61 FR 20610, May 7, 1996]
Subpart D—Type A Procedures
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§ 11.40 What are type A procedures?
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(a) A type A procedure is a standardized methodology for performing Injury Determination, Quantification, and Damage Determination that requires minimal field observation. There are two type A procedures: the type A procedure for coastal and marine environments; and the type A procedure for Great Lakes environments. The type A procedure for coastal and marine environments incorporates a computer model called the Natural Resource Damage Assessment Model for Coastal and Marine Environments Version 2.51 (NRDAM/CME). The NRDAM/CME technical document (incorporated by reference, see §11.18) includes and explains the NRDAM/CME. The type A procedure for Great Lakes environments incorporates a computer model called the Natural Resource Damage Assessment Model for Great Lakes Environments Version 1.51 (NRDAM/GLE). The NRDAM/GLE technical document (incorporated by reference, see §11.18) includes and explains the NRDAM/GLE. The authorized official must follow §§11.41 through 11.44 when using the type A procedures.
(b) The reasonable and necessary costs incurred in conducting assessments under this subpart shall be limited to those costs incurred or anticipated by the authorized official for, and specifically allocable to, incident-specific efforts taken in the assessment of damages for natural resources for which the agency or Indian tribe is acting as trustee. Such costs shall be supported by appropriate records and documentation, and shall not reflect regular activities performed by the agency or the Indian tribe in management of the natural resource. Activities undertaken as part of the damage assessment shall be taken in a manner that is cost-effective, as that phrase is used in this part.
[52 FR 9096, Mar. 20, 1987, as amended at 53 FR 5175, Feb. 22, 1988; 61 FR 20611, May 7, 1996; 62 FR 60459, Nov. 10, 1997; 65 FR 6014, Feb. 8, 2000]
§ 11.41 What data must the authorized official supply?
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(a) The NRDAM/CME and the NRDAM/GLE require several data inputs to operate. The authorized official must develop the following data inputs:
(1) The identity of the released substance;
(2) The mass or volume of the identified substance that was released;
(3) The duration of the release;
(4) The time of the release;
(5) The location of the release;
(6) The wind conditions;
(7) The extent of response actions;
(8) The extent of any closures;
(9) The implicit price deflator; and
(10) For the NRDAM/CME, the condition of the currents and tides.
(b) The authorized official must change the data in the NRDAM/CME and the NRDAM/GLE for the following parameters if he or she is aware of more accurate data:
(1) Air temperature;
(2) Water temperature at the surface;
(3) Total suspended sediment concentration;
(4) Mean settling velocity of suspended solids; and
(5) Habitat type.
(c)(1) If the release occurred in Alaska and the authorized official is not aware of any reliable evidence that ice was absent from the site of the release, then he or she must turn on the ice modeling function. Otherwise, the authorized official must leave the ice modeling function off.
(2) If the release occurred in the Great Lakes and the authorized official is aware of reliable evidence that ice was absent from the site of the release, then he or she must turn off the ice modeling function.
(d) The authorized official must develop the data inputs and modifications and include them in the Assessment Plan in the format specified in Appendix II (for the NRDAM/CME) or Appendix III (for the NRDAM/GLE).
[61 FR 20611, May 7, 1996]
§ 11.42 How does the authorized official apply the NRDAM/CME or NRDAM/GLE?
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(a) The authorized official must perform a preliminary application of the NRDAM/CME or NRDAM/GLE with the data inputs and modifications developed under §11.41. Volume II of the NRDAM/CME technical document (incorporated by reference, see §11.18) describes how to apply the NRDAM/CME. Volume II of the NRDAM/GLE technical document (incorporated by reference, see §11.18) describes how to apply the NRDAM/GLE. For cases involving releases of two or more substances or a release of a mixture of substances, the authorized official may only apply the NRDAM/CME or NRDAM/GLE once using only one of the substances.
(b) If the preliminary application of the NRDAM/CME or NRDAM/GLE indicates damages in excess of $100,000, then the authorized official must decide whether to:
(1) Limit the portion of his or her claim calculated with the type A procedure to $100,000; or
(2) Compute all damages using type B procedures.
[61 FR 20611, May 7, 1996]
§ 11.43 Can interested parties review the results of the preliminary application?
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After completing the preliminary application of the NRDAM/CME or NRDAM/GLE, if the authorized official decides to continue with the type A procedure, he or she must issue an Assessment Plan for public comment as described in §11.32. The Assessment Plan must include the information described in §11.31, the data inputs and modifications developed under §11.41, and a summary of the results of the preliminary application. The Assessment Plan must also identify a contact from whom a complete copy of the printout of the preliminary application can be obtained.
[61 FR 20612, May 7, 1996]
§ 11.44 What does the authorized official do after the close of the comment period?
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(a) The authorized official must carefully review all comments received on the Assessment Plan, provide substantive responses to all comments, and modify the Plan as appropriate. [See §11.32(e)(2) to determine if the authorized official must provide for additional public review.]
(b) If, after reviewing the public comments, the authorized official decides to continue with the type A procedure, he or she must then perform a final application of the NRDAM/CME or NRDAM/GLE, using final data inputs and modifications based on §11.41 and any reliable information received during the public review and comment period.
(c) After completing the final application of the NRDAM/CME or NRDAM/GLE, the authorized official must prepare a Report of Assessment. The Report of Assessment must include the printed output from the final application as well as the Preassessment Screen Determination and the Assessment Plan.
(d) If the authorized official is aware of reliable evidence that a private party has recovered damages for commercial harvests lost as a result of the release, the authorized official must eliminate from the claim any damages for such lost harvests that are included in the lost economic rent calculated by the NRDAM/CME or NRDAM/GLE.
(e) If the authorized official is aware of reliable evidence that the NRDAM/CME or NRDAM/GLE application covers resources beyond his or her trustee jurisdiction, the authorized official must either:
(1) Have the other authorized official(s) who do have trustee jurisdiction over those resources join in the type A assessment; or
(2) Eliminate any damages for those resources from the claim for damages.
(f) If the final application of the NRDAM/CME or NRDAM/GLE, adjusted as needed under paragraphs (d) and (e), calculates damages in excess of $100,000, then the authorized official must limit the portion of his or her claim calculated with the type A procedure to $100,000.
(g) After preparing the Report of Assessment, the authorized official must follow the steps described in subpart F.
[61 FR 20612, May 7, 1996]
Subpart E—Type B Procedures
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§ 11.60 Type B assessments—general.
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(a) Purpose. The purpose of the type B assessment is to provide alternative methodologies for conducting natural resource damage assessments in individual cases.
(b) Steps in the type B assessment. The type B assessment consists of three phases: §11.61—Injury Determination; §11.70—Quantification; and §11.80—Damage Determination, of this part.
(c) Completion of type B assessment. After completion of the type B assessment, a Report of Assessment, as described in §11.90 of this part, shall be prepared. The Report of Assessment shall include the determinations made in each phase.
(d) Type B assessment costs. (1) The following categories of reasonable and necessary costs may be incurred in the assessment phase of the damage assessment:
(i) Sampling, testing, and evaluation costs for injury and pathway determination;
(ii) Quantification costs (including baseline service determination and resource recoverability analysis);
(iii) Restoration and Compensation Determination Plan development costs including:
(A) Development of alternatives;
(B) Evaluation of alternatives;
(C) Potentially responsible party, agency, and public reviews;
(D) Other such costs for activities authorized by §11.81 of this part;
(iv) Cost estimating and valuation methodology calculation costs; and
(v) Any other assessment costs authorized by §§11.60–11.84 of this part.
(2) The reasonable and necessary costs for these categories shall be limited to those costs incurred or anticipated by the authorized official for, and specifically allocable to, site-specific efforts taken in the assessment of damages for a natural resource for which the agency or Indian tribe is acting as trustee. Such costs shall be supported by appropriate records and documentation, and shall not reflect regular activities performed by the agency or the Indian tribe in management of the natural resource. Activities undertaken as part of the damage assessment phase shall be taken in a manner that is cost-effective, as that phrase is used in this part.
[51 FR 27725, Aug. 1, 1986, as amended at 53 FR 5175, Feb. 22, 1988; 59 FR 14283, Mar. 25, 1994]
§ 11.61 Injury determination phase—general.
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(a) Requirement. (1) The authorized official shall, in accordance with the procedures provided in the Injury Determination phase of this part, determine: whether an injury to one or more of the natural resources has occurred; and that the injury resulted from the discharge of oil or release of a hazardous substance based upon the exposure pathway and the nature of the injury.
(2) The Injury Determination phase consists of §11.61—general; §11.62—injury definition; §11.63—pathway determination; and §11.64—testing and sampling methods, of this part.
(b) Purpose. The purpose of the Injury Determination phase is to ensure that only assessments involving well documented injuries resulting from the discharge of oil or release of a hazardous substance proceed through the type B assessment.
(c) Injury Determination phase steps. (1) The authorized official shall determine whether the potentially injured resource constitutes a surface water, ground water, air, geologic, or biological resource as defined in §11.14 of this part. The authorized official shall then proceed in accordance with the guidance provided in the injury definition section, §11.62 of this part, to determine if the resource is injured.
(2) The authorized official shall follow the guidance provided in the testing and sampling methods section, §11.64 of this part, in selecting the methodology for determining injury. The authorized official shall select from available testing and sampling procedures one or more procedures that meet the requirements of the selected methodologies.
(3) The authorized official shall follow the guidance provided in the pathway section, §11.63 of this part, to determine the route through which the oil or hazardous substance is or was transported from the source of the discharge or release to the injured resource.
(4) If more than one resource, as defined in §11.14(z) of this part, has potentially been injured, an injury determination for each resource shall be made in accordance with the guidance provided in each section of the Injury Determination phase.
(d) Selection of methodologies. (1) One of the methodologies provided in §11.64 of this part for the potentially injured resource, or one that meets the acceptance criteria provided for that resource, shall be used to establish injury.
(2) Selection of the methodologies for the Injury Determination phase shall be based upon cost-effectiveness as that phrase is used in this part.
(e) Completion of Injury Determination phase. (1) Upon completion of the Injury Determination phase, the Assessment Plan shall be reviewed in accordance with the requirements of §11.32(f) of this part.
(2) When the authorized official has determined that one or more of the natural resources has been injured as a result of the discharge or release, the authorized official may proceed to the Quantification and the Damage Determination phases.
(3) When the authorized official has determined that an injury has not occurred to at least one of the natural resources or that an injury has occurred but that the injury cannot be linked to the discharge or release, the authorized official shall not pursue further assessment under this part.
§ 11.62 Injury determination phase—injury definition.
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(a) The authorized official shall determine that an injury has occurred to natural resources based upon the definitions provided in this section for surface water, ground water, air, geologic, and biological resources. The authorized official shall test for injury using the methodologies and guidance provided in §11.64 of this part. The test results of the methodologies must meet the acceptance criteria provided in this section to make a determination of injury.
(b) Surface water resources. (1) An injury to a surface water resource has resulted from the discharge of oil or release of a hazardous substance if one or more of the following changes in the physical or chemical quality of the resource is measured:
(i) Concentrations and duration of substances in excess of drinking water standards as established by sections 1411–1416 of SDWA, or by other Federal or State laws or regulations that establish such standards for drinking water, in surface water that was potable before the discharge or release;
(ii) Concentrations and duration of substances in excess of water quality criteria established by section 1401(1)(D) of SDWA, or by other Federal or State laws or regulations that establish such criteria for public water supplies, in surface water that before the discharge or release met the criteria and is a committed use, as the phrase is used in this part, as a public water supply;
(iii) Concentrations and duration of substances in excess of applicable water quality criteria established by section 304(a)(1) of the CWA, or by other Federal or State laws or regulations that establish such criteria, in surface water that before the discharge or release met the criteria and is a committed use, as that phrase is used in this part, as a habitat for aquatic life, water supply, or recreation. The most stringent criterion shall apply when surface water is used for more than one of these purposes;
(iv) Concentrations of substances on bed, bank, or shoreline sediments sufficient to cause the sediment to exhibit characteristics identified under or listed pursuant to section 3001 of the Solid Waste Disposal Act, 42 U.S.C. 6921; or
(v) Concentrations and duration of substances sufficient to have caused injury as defined in paragraphs (c), (d), (e), or (f) of this section to ground water, air, geologic, or biological resources, when exposed to surface water, suspended sediments, or bed, bank, or shoreline sediments.
(2)(i) The acceptance criterion for injury to the surface water resource is the measurement of concentrations of oil or a hazardous substance in two samples from the resource. The samples must be one of the following types, except as specified in paragraph (b)(3) of this section:
(A) Two water samples from different locations, separated by a straight-line distance of not less than 100 feet; or
(B) Two bed, bank, or shoreline sediment samples from different locations separated by a straight-line distance of not less than 100 feet; or
(C) One water sample and one bed, bank, or shoreline sediment sample; or
(D) Two water samples from the same location collected at different times.
(ii) In those instances when injury is determined and no oil or hazardous substances are detected in samples from the surface water resource, it must be demonstrated that the substance causing injury occurs or has occurred in the surface water resource as a result of physical, chemical, or biological reactions initiated by the discharge of oil or release of a hazardous substance.
(3) If the maximum straight-line distance of the surface water resource is less than 100 feet, then the samples required in paragraph (b)(2)(i) (A) and (B) of this section should be separated by one-half the maximum straight-line distance of the surface water resource.
(c) Ground water resources. (1) An injury to the ground water resource has resulted from the discharge of oil or release of a hazardous substance if one or more of the following changes in the physical or chemical quality of the resource is measured:
(i) Concentrations of substances in excess of drinking water standards, established by sections 1411–1416 of the SDWA, or by other Federal or State laws or regulations that establish such standards for drinking water, in ground water that was potable before the discharge or release;
(ii) Concentrations of substances in excess of water quality criteria, established by section 1401(1)(d) of the SDWA, or by other Federal or State laws or regulations that establish such criteria for public water supplies, in ground water that before the discharge or release met the criteria and is a committed use, as the phrase is used in this part, as a public water supply;
(iii) Concentrations of substances in excess of applicable water quality criteria, established by section 304(a)(1) of the CWA, or by other Federal or State laws or regulations that establish such criteria for domestic water supplies, in ground water that before the discharge or release met the criteria and is a committed use as that phrase is used in this part, as a domestic water supply; or
(iv) Concentrations of substances sufficient to have caused injury as defined in paragraphs (b), (d), (e), or (f) of this section to surface water, air, geologic, or biological resources, when exposed to ground water.
(2) The acceptance criterion for injury to ground water resources is the measurement of concentrations of oil or hazardous substance in two ground water samples. The water samples must be from the same geohydrologic unit and must be obtained from one of the following pairs of sources, except as specified in paragraph (c)(3) of this section:
(i) Two properly constructed wells separated by a straight-line distance of not less than 100 feet; or
(ii) A properly constructed well and a natural spring or seep separated by a straight-line distance of not less than 100 feet; or
(iii) Two natural springs or seeps separated by a straight-line distance of not less than 100 feet.
(3) If the maximum straight-line distance of the ground water resource is less than 100 feet, the samples required in paragraph (c)(2) of this section should be separated by one-half of the maximum straight-line distance of the ground water resource.
(4) In those instances when injury is determined and no oil or hazardous substance is detected in samples from the ground water resource, it must be demonstrated that the substance causing injury occurs or has occurred in the ground water resource as a result of physical, chemical, or biological reactions initiated by the discharge of oil or release of hazardous substances.
(d) Air resources. An injury to the air resource has resulted from the discharge of oil or release of a hazardous substance if one or more of the following changes in the physical or chemical quality of the resource is measured:
(1) Concentrations of emissions in excess of standards for hazardous air pollutants established by section 112 of the Clean Air Act, 42 U.S.C. 7412, or by other Federal or State air standards established for the protection of public welfare or natural resources; or
(2) Concentrations and duration of emissions sufficient to have caused injury as defined in paragraphs (b), (c), (e), or (f) of this section to surface water, ground water, geologic, or biological resources when exposed to the emissions.
(e) Geologic resources. An injury to the geologic resource has resulted from the discharge of oil or release of a hazardous substance if one or more of the following changes in the physical or chemical quality of the resource is measured:
(1) Concentrations of substances sufficient for the materials in the geologic resource to exhibit characteristics identified under or listed pursuant to section 3001 of the Solid Waste Disposal Act, 42 U.S.C. 6921;
(2) Concentrations of substances sufficient to raise the negative logarithm of the hydrogen ion concentration of the soil (pH) to above 8.5 (above 7.5 in humid areas) or to reduce it below 4.0;
(3) Concentrations of substances sufficient to yield a salt saturation value greater than 2 millimhos per centimeter in the soil or a sodium adsorption ratio of more than 0.176;
(4) Concentrations of substances sufficient to decrease the water holding capacity such that plant, microbial, or invertebrate populations are affected;
(5) Concentrations of substances sufficient to impede soil microbial respiration to an extent that plant and microbial growth have been inhibited;
(6) Concentrations in the soil of substances sufficient to inhibit carbon mineralization resulting from a reduction in soil microbial populations;
(7) Concentrations of substances sufficient to restrict the ability to access, develop, or use mineral resources within or beneath the geologic resource exposed to the oil or hazardous substance;
(8) Concentrations of substances sufficient to have caused injury to ground water, as defined in paragraph (c) of this section, from physical or chemical changes in gases or water from the unsaturated zone;
(9) Concentrations in the soil of substances sufficient to cause a toxic response to soil invertebrates;
(10) Concentrations in the soil of substances sufficient to cause a phytotoxic response such as retardation of plant growth; or
(11) Concentrations of substances sufficient to have caused injury as defined in paragraphs (b), (c), (d), or (f), of this section to surface water, ground water, air, or biological resources when exposed to the substances.
(f) Biological resources. (1) An injury to a biological resource has resulted from the discharge of oil or release of a hazardous substance if concentration of the substance is sufficient to:
(i) Cause the biological resource or its offspring to have undergone at least one of the following adverse changes in viability: death, disease, behavioral abnormalities, cancer, genetic mutations, physiological malfunctions (including malfunctions in reproduction), or physical deformations; or
(ii) Exceed action or tolerance levels established under section 402 of the Food, Drug and Cosmetic Act, 21 U.S.C. 342, in edible portions of organisms; or
(iii) Exceed levels for which an appropriate State health agency has issued directives to limit or ban consumption of such organism.
(2) The method for determining injury to a biological resource, as defined in paragraph (f)(1)(i) of this section, shall be chosen based upon the capability of the method to demonstrate a measurable biological response. An injury can be demonstrated if the authorized official determines that the biological response under consideration can satisfy all of the following acceptance criteria:
(i) The biological response is often the result of exposure to oil or hazardous substances. This criterion excludes biological responses that are caused predominately by other environmental factors such as disturbance, nutrition, trauma, or weather. The biological response must be a commonly documented response resulting from exposure to oil or hazardous substances.
(ii) Exposure to oil or hazardous substances is known to cause this biological response in free-ranging organisms. This criterion identifies biological responses that have been documented to occur in a natural ecosystem as a result of exposure to oil or hazardous substances. The documentation must include the correlation of the degree of the biological response to the observed exposure concentration of oil or hazardous substances.
(iii) Exposure to oil or hazardous substances is known to cause this biological response in controlled experiments. This criterion provides a quantitative confirmation of a biological response occurring under environmentally realistic exposure levels that may be linked to oil or hazardous substance exposure that has been observed in a natural ecosystem. Biological responses that have been documented only in controlled experimental conditions are insufficient to establish correlation with exposure occurring in a natural ecosystem.
(iv) The biological response measurement is practical to perform and produces scientifically valid results. The biological response measurement must be sufficiently routine such that it is practical to perform the biological response measurement and to obtain scientifically valid results. To meet this criterion, the biological response measurement must be adequately documented in scientific literature, must produce reproducible and verifiable results, and must have well defined and accepted statistical criteria for interpreting as well as rejecting results.
(3) Unless otherwise provided for in this section, the injury determination must be based upon the establishment of a statistically significant difference in the biological response between samples from populations in the assessment area and in the control area. The determination as to what constitutes a statistically significant difference must be consistent with the quality assurance provisions of the Assessment Plan. The selection of the control area shall be consistent with the guidance provided in §11.72 of this part.
(4) The biological responses listed in this paragraph have been evaluated and found to satisfy the acceptance criteria provided in paragraph (f)(2) of this section. The authorized official may, when appropriate, select from this list to determine injury to fish and wildlife resources or may designate another response as the determiner of injury provided that the designated response can satisfy the acceptance criteria provided in paragraph (f)(2) of this section. The biological responses are listed by the categories of injury for which they may be applied.
(i) Category of injury—death. Five biological responses for determining when death is a result of exposure to the discharge of oil or release of a hazardous substance have met the acceptance criteria.
(A) Brain cholinesterase (ChE) enzyme activity. Injury has occurred when brain ChE activity in a sample from the population has been inhibited by at least 50 percent compared to the mean for normal brain ChE activity of the wildlife species. These enzymes are in the nervous system of vertebrate organisms and the rate of ChE activity is associated with the regulation of nerve impulse transmission. This biological response may be used to confirm injury when anti-ChE substances, such as organophosphorus and carbamate pesticides, are suspected to have resulted in death to bird and mammal species.
(B) Fish kill investigations. Injury has occurred when a significant increase in the frequency or numbers of dead or dying fish can be measured in accordance with the procedures for counting dead or dying fish contained in Part II (Fish-Kill Counting Guidelines) of “Monetary Values of Freshwater Fish and Fish-Kill Counting Guidelines,” American Fisheries Society Special Publication Number 13, 1982 (incorporated by reference, see §11.18).
(C) Wildlife kill investigations. Injury has occurred when a significant increase in the frequency or number of dead or dying birds or mammal species can be measured in a population sample from the assessment area as compared to a population sample from a control area. Wildlife kill investigations may be used when acute mortality has occurred to multiple wildlife species, or when detectable quantities of oil or hazardous substances have adherred to, bound to, or otherwise covered surface tissue, or had been ingested or inhaled by dead or dying bird or mammal species. (continued)