EPA REACHES SETTLEMENT ON "CAMU" RULE

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Summary

FEB. 11, 2000 - The Environmental Protection Agency, the Environmental Defense Fund, the National Resources Defense Council and the Environmental Technology Council today reached a settlement agreement on the pending litigation over the Corrective Action Management Unit (CAMU) regulation for remediation waste under the Resource Conservation and Recovery Act (RCRA). The settlement is being filed today in the U.S. Court of Appeals for the District of Columbia Circuit. Under the settlement, if EPA promulgates amendments to the CAMU rule described in the settlement and certain other conditions are met, the CAMU lawsuit will be dropped.

Timothy Fields Jr., EPA Assistant Administrator for Solid Waste and Emergency Response, said, "Today's landmark settlement on CAMU is critical to sustain the success of the RCRA cleanup reform agenda. The settlement significantly reduces the cloud of legal uncertainty over the CAMU rule that has discouraged hazardous waste cleanups. By doing so this settlement will allow cleanups already underway to proceed, and it will encourage the cleanup of thousands of other hazardous waste sites across the nation."

The Agency has been in discussions for the better part of a year in an effort to settle litigation over the CAMU rule. In conjunction with the settlement process, EPA obtained feedback from many stakeholders from industry and the states to help inform today's settlement. The settlement calls for EPA to propose amendments to the existing CAMU rule by August 7, 2000, and to publish a final rule by October 8, 2001. While not part of the settlement, EPA also intends to include in the proposed amendments provisions for expediting state authorization of these amendments and will take public comment on all of the proposed changes.

Today's settlement calls for the Agency to amend the 1993 CAMU rule. That rule was written to address the potential disincentives to cleanup created by RCRA rules when applied to the management of RCRA hazardous remediation wastes during cleanup. Amendments to the 1993 rule specified in the settlement would establish CAMU-specific treatment and design standards. Among other things, the amendments would impose minimum treatment standards for principal hazardous constituents in CAMU wastes and minimum liner and cap standards for CAMUs. The settlement also includes a number of adjustment factors that allow for site-specific adjustments to treatment, striking a balance between minimum national standards and flexibility that is appropriate for the site-specific nature of cleanups.

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Details

(Attachment to settlement agreement filed February 11, 2000 in Environmental Defense

Fund v. U.S. EPA, No. 93-1316(D.C. Cir.)(petition for review of Corrective Action

Management Rule). Settlement also addresses petition for review filed by same

petitioners in Environmental Defense Fund v. U.S. EPA, No. 99-1077 (D.C. Circuit)

(regarding the "HWIR-Media" rule).)

 

 

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ATTACHMENT A

 

NOTE: The language below contains either rule language, points for discussion in

the preamble (generally identified by an asterisk (*)), or otherwise describes

the changes to be made.

 

I CAMU Eligibility

 

Location: Up front in the CAMU rule (264.552)

 

CAMU-Eligible Waste means,

 

(a) all solid and hazardous wastes, and all media (including groundwater, surface water, soils, and

sediments) and debris that contain listed hazardous wastes or that themselves exhibit a hazardous

characteristic and are managed for implementing cleanup. As-generated wastes (either hazardous or

non-hazardous) from ongoing industrial operations at a site are not CAMU-eligible wastes.

 

(b) Wastes that would otherwise meet the description in (a) are not "CAMU-Eligible Wastes" where: (1)

the wastes are hazardous wastes found during cleanup in intact or substantially intact containers,

tanks, or other non-land-based units, unless (i) the wastes are first placed in the tanks, containers

or non-land-based units as part of cleanup, or (ii) the containers are excavated during the course of

cleanup; or (2) the Director exercises the discretion in [discretionary kickout--below] to prohibit

the wastes from management in a CAMU.

 

(c) Notwithstanding (a), where appropriate, as-generated non-hazardous waste may be placed in a CAMU

where such waste is being used to facilitate treatment or the performance of the CAMU.

 

Part (a) of the CAMU-Eligible Waste Definition:

 

* Added clarifying language (from current CAMU preamble) to the existing definition of remediation

waste, which is currently used to define what wastes are eligible to be managed in a CAMU. The

changes are intended to make clear that "as-generated" wastes from routine hazardous waste management

activities are not eligible for management in a CAMU. The primary intent is to create a "firewall"

between industrial process waste and cleanup waste. Similarly, the discussion below is intended to

clarify the distinction between process and cleanup waste by more thoroughly fleshing out what types

of wastes are and are not "managed for implementing cleanup."

 

* Wastes "managed for implementing cleanup" include wastes removed during RCRA closure at closed or

closing permanent land disposal units. "Closed or closing" means units that have received their final

volume of waste. "Permanent land disposal units" are those for which the regulations provide a

closure in place option (e.g., landfills, surface impoundments and some land treatment units).

 

* Wastes "managed for implementing cleanup" would not typically include wastes removed during RCRA

closure of non-permanent land-based units (e.g., waste piles); in other words, closure of such units

would not be considered "cleanup." Similarly, hazardous sludges periodically removed from subtitle C

regulated surface impoundments would not be included. Of course, wastes that have been released from

 

such units would likely be the subject of "cleanup" and therefore eligible. The "typically" is

intended to preserve the Agency's ability, for example, at abandoned facilities, to place waste found

in old piles or similar units in a CAMU because once they are abandoned, management of wastes they

contain is for the purpose of implementing cleanup.

 

* Rationale for previous two bullets: for piles and similar land-based storage units, removal of wastes

is part of the normal course of operation; these units were not intended as the final resting place

for wastes. Therefore, it would typically be inappropriate to consider such removal "cleanup."

However, for permanent disposal units, closure by removal is cleanup, because the regulations provide

an option for closure in place. Plus, the Agency seeks to encourage closure by removal - allowing

CAMUs will do that.

 

Part (b)(1) of the CAMU-Eligible Waste Definition:

 

* "Other non-land-based units" - This concept is intended to include intact or substantially intact non-

land-based units that are not "containers" or "tanks," but were designed to contain wastes (e.g.,

containment buildings under Part 264, Subpart DD and Part 265, Subpart DD).

 

* EPA interprets "substantially intact" to include units/containers with imperfections such that the

unit/container can be removed without likelihood of a significant release to the environment. For

example, some facilities have old underground masonry constructed units that have not been used in

decades, and would arguably meet the definition of a tank. In some cases, given the age,

construction, and size of these units, it would be reasonable to assume that the units are not

substantially intact and therefore the wastes removed from the units would be CAMU-eligible. In other

cases, such historic units would be considered land-based units under RCRA (e.g., old building

foundations) and the waste would not be excluded from CAMU-eligibility.

 

Part (b)(2) of the CAMU-Eligible Waste Definition:

 

The Director may prohibit, where appropriate, the placement of waste in a CAMU where the Director has

or receives information that such wastes have not been managed in compliance with applicable land

disposal treatment standards of Part 268, or applicable Part 264 or 265 unit design requirements, or

that non-compliance with other applicable RCRA requirements likely contributed to the release of the

waste.

 

Amended 264.552(d):

 

The owner/operator shall provide sufficient information to enable the Regional Administrator to

designate a CAMU in accordance with the requirements of 264.552. This information must include,

unless not reasonably available, information: 1) on the origin of the waste and how it was

subsequently managed (including a description of the timing and circumstances surrounding the disposal

and/or release); 2) whether the waste was listed or identified as hazardous at the time of disposal

and/or release; and 3) whether the waste was subject to the land disposal requirements of Part 268 of

this chapter at the time of disposal and/or release.

 

 

* Intent of Kickout: Allows exclusion from CAMU of wastes not managed in compliance with certain RCRA

requirements through exercise of Director's discretion. Discretion provides balance between

facilitating cleanups with CAMUs and maintaining incentives for waste minimization and proper waste

management in the first instance. With discretionary authority, Director has the ability to use

CAMUs, even if there had been prior non-compliance, where appropriate.

 

* Where appropriate to disallow CAMU management: The Director should consider exercising discretionary

kickout where there was prior non-compliance with the applicable land disposal treatment standards of

Part 268, the Part 264 or 265 unit design requirements, or where non-compliance with other applicable

RCRA requirements likely contributed to the release of the waste. In the analysis of whether to

disallow management in the CAMU, the Director will consider the significance of the violation, among

other site-specific factors. It would be generally appropriate to allow management in a CAMU where

the entity seeking the CAMU is not the same entity, or affiliated with the entity, that mishandled the

waste.

 

* The information submission approach would provide the Director and the public with information on the

circumstances surrounding the origin and subsequent management of the waste. The Director would use

this information for the purposes of deciding whether the waste is CAMU eligible, including whether

such waste is one for which kickout should be considered. For the purpose of determining CAMU

eligibility, the Director should, where appropriate, seek information regarding waste history beyond

that initially submitted pursuant to 264.552(d). In particular, where the information submission

raises concerns about prior waste management or where the Director has some other information--such as

information already in its possession or brought to the Director's attention by a citizens group--that

raises concerns about prior waste management, the Director should seek additional information

necessary to determine whether to invoke the discretionary kickout authority. Where information

responding to the requirements in 552(d)(1)-(3) is not reasonably available, the facility could

fulfill these information submission requirements by informing the Director on the extent of its

knowledge about the waste and releases.

 

* The term "unit design requirements" refers to substantive design standards, such as the tank design

standards under 40CFR 264.192 or the design requirements for waste piles under 264.251. Maintenance

requirements, such as the owner/operator requirement to inspect tanks under 264.195, would be

addressed under the phrase "or that non-compliance with other applicable RCRA requirements likely

contributed to the release of the waste."

 

Liquids in CAMUs

 

Location: Up-front in CAMU rule (264.552)

 

Prohibition Against Placing Liquids in CAMUs

 

(a) The placement of bulk or noncontainerized liquid hazardous waste or free liquids contained in

hazardous waste (whether or not absorbents have been added) in any CAMU is prohibited except where

placement of such wastes facilitates the remedy selected for the waste.

 

 

(b) The requirements in 264.314(d) for placement of containers holding free liquids in landfills

apply to placement in a CAMU except where placement facilitates the remedy selected for the waste.

 

(c) The placement of any liquid which is not a hazardous waste in a CAMU is prohibited unless: (i)

such placement facilitates the remedy selected for the waste; or (ii) a demonstration is made pursuant

to 264.314(f).

 

* Consistent with the long-standing approach for landfills, liquids should generally not be placed in

CAMUs. However, there will be instances where it is appropriate to place liquids or wastes containing

liquids in CAMUs to facilitate the remedy selected for the waste. Liquids might be introduced into

the CAMU, for example, during dewatering of sludges or sediments, to facilitate bioremediation, for

soil washing or solvent extraction technologies, for dust suppression.

 

II Identification of "Principal Hazardous Constituents"

 

Location: probably after or as a modification to 264.552(e).

 

(a) CAMU-eligible wastes that, absent this section, would be subject to the treatment requirements of

Part 268, and that the Director determines contain principal hazardous constituents must be treated to

the standards specified in [treatment requirements]. Principal hazardous constituents are those

constituents that the Director determines pose a risk to human health and the environment

substantially higher than the cleanup levels or goals at the site. In general, the Director will

designate as principal hazardous constituents: 1) carcinogens that pose a potential direct risk from

ingestion or inhalation at the site at or above 10-3; and, 2) non-carcinogens that pose a potential

direct risk from ingestion or inhalation at the site an order of magnitude or greater over their

reference dose. The Director will also designate constituents as principal hazardous constituents,

where appropriate, based on risks posed by the potential migration of constituents in wastes to

groundwater, considering such factors as constituent concentrations, and fate and transport

characteristics under site conditions. The Director may also designate other constituents as

principal hazardous constituents that the Director determines pose a risk to human health and the

environment substantially higher than the cleanup levels or goals at the site.

 

(b) In determining which constituents are "principal hazardous constituents," the Director must

consider all constituents which, absent this section, would be subject to the treatment requirements

in 40 CFR Part 268.

 

 

* The Director identifies principal hazardous constituents as constituents that pose a risk that is

substantially higher than the cleanup levels or goals at the site. Once designated, these principal

hazardous constituents would be subject to the treatment standards. For carcinogens, the Agency

generally sets site-specific risk goals for final cleanup within the risk range of 10-4 to 10-6, with

10-6 being the point of departure. Therefore, concentrations in CAMU waste that pose potential risks

at or above 10-3 will typically define principal hazardous constituents. In the rare cases where the

final cleanup goal for the site falls at the upper end of the risk range (e.g., at 10-4),

concentrations in CAMU waste at or above the 10-3 level should still be generally established as

 

defining principal hazardous constituents.

 

* Constituents posing a risk of 10-3 or greater, or 10 times the reference dose or greater, will

generally be identified by the Director as principal hazardous constituents. Concentrations above, but

near the 10-3 potential risk level would be looked at closely in light of assumptions that underlie

the 10-3 determination (e.g., their chemical characteristics and site conditions) prior to determining

whether they were principal hazardous constituents.

 

For example, if a constituent posed risks close to a 10-3 level, based on conservative default

assumptions (e.g., promulgated state default tables or generic assumptions used to determine

bioavailability), and the underlying assumptions are not applicable at the site in question,

the Director could determine that the constituents should not be designated as principal

hazardous constituents.

 

The general approach for designating principal hazardous constituents is qualified by the

phrase, "The Director may also designate other constituents as principal hazardous

constituents...," because there may be other constituents that meet the standard (i.e., that

pose a risk to human health and the environment substantially higher than the cleanup levels

or goals at the site). For example, the Director could also determine that constituents

posing risks less than 10-3 are principal hazardous constituents, such as a constituent posing

10-4 potential risk that is highly mobile, at a site where protection of groundwater is an

especially significant issue.

 

* As a general principle, in situations where constituents in soil pose a significant potential threat

through the groundwater pathway (e.g., based on fate and transport modeling) and the soil is excavated

for disposal in a CAMU, the Director should strongly consider whether to designate such constituents

as PHCs if they are not otherwise designated. In determining the appropriateness of this designation,

the Director could consider a range of site-specific factors, including location of the CAMU, nature

of the waste and constituents, how the waste will be managed and beneficial use of groundwater.

 

* The above approach to principal hazardous constituents (i.e., emphasizing risks from toxicity) does

not mean that only the listed factors could be used to determine whether constituents meet the

principal hazardous constituent standard (i.e., constituents that pose a risk to human health and the

environment substantially higher than the cleanup levels or goals at the site). Other site-specific

factors, such as ecological concerns, constituent mobility, or potential risks posed by dermal

contact, might, on a site-specific basis, be weighed in identifying principal hazardous constituents.

 

* The principal hazardous constituent approach compares risks posed by the waste to the cleanup levels

or goals established at the site. This approach would make use of the process typically used by EPA

or the authorized state for establishing cleanup levels or goals at a site. The comparison would

assume direct exposure and consider reasonably anticipated land use (which could be residential or

non-residential). Fate and transport would only be considered for assessing the migration of

constituents from waste into groundwater or air, for the purpose of determining the risk posed by

direct exposure to the groundwater or inhalation.

 

 

* In determining which constituents are "principal hazardous constituents," the Director must consider

all constituents that would be subject to Part 268 treatment standards if not placed in a CAMU. This

means: for listed sludges, "regulated hazardous constituents" (see 268.40, Table "Treatment Standards

for Hazardous Wastes"); for characteristic wastes, all "underlying hazardous constituents" (see

268.40(e), 268.2(c)); for soil, "constituents subject to treatment" (see 268.49(d)).

 

III Treatment Standards

 

Location: probably after or as a modification to 264.552(e).

 

Treatment standards for waste placed in CAMUs other than temporary CAMUS. Waste that the Director

determines contains principal hazardous constituents must meet treatment standards determined in

accordance with paragraph (a) or (b) below:

 

(a) Treatment standards for wastes placed in CAMUs.

 

(1) For non-metals, treatment must achieve 90 percent reduction in total principal hazardous

constituent concentrations, except as provided by paragraph (3) of this section.

 

(2) For metals, treatment must achieve 90 percent reduction in principal hazardous constituent

concentrations as measured in leachate from the treated waste or media (tested according to

the TCLP) or 90 percent reduction in total constituent concentrations (when a metal removal

treatment technology is used), except as provided by paragraph (3) of this section.

 

(3)When treatment of any principal hazardous constituent to a 90 percent reduction standard

would result in a concentration less than 10 times the Universal Treatment Standard for that

constituent, treatment to achieve constituent concentrations less than 10 times the Universal

Treatment Standard is not required. Universal Treatment Standards are identified in 40 CFR

268.48 Table UTS.

 

(4) For waste exhibiting the hazardous characteristic of ignitability, corrosivity or

reactivity, the waste must also be treated to eliminate these characteristics.

 

(5) For debris, the debris must be treated in accordance with 40 CFR 268.45 or by methods or to

levels established under paragraph (a) or (b) of this section.

 

(b) Adjusted standards. The Director may adjust the treatment level or method established in (a) to a

higher or lower level, based on one or more of the following factors, as appropriate. The adjusted

level or method must be protective of human health and the environment:

 

1) the technical impracticability of treatment to the levels or by the methods established by

(a);

 

2) the levels or methods established by (a) would result in concentrations of hazardous

constituents that are significantly above or below cleanup standards applicable to the site

 

(established either site-specifically, or promulgated under state or federal law);

 

3) the views of the affected local community on the treatment levels or methods for the site

under (a), and, for treatment levels, the treatment methods necessary to achieve these levels;

 

4) the short-term risks presented by the on-site treatment method necessary to achieve the

levels or treatment methods established by (a);

 

5) the long-term protection offered by the engineering design of the CAMU and related

engineering controls:

 

(A) where the treatment standards in (a) are substantially met and the principal

hazardous constituents in the waste or residuals are of very low mobility; or

 

(B) where cost-effective treatment has been used, or where, after review of

appropriate treatment technologies, the Director determines that such treatment is not

reasonably available, and:

 

1) the CAMU meets the Subtitle C liner and leachate collection requirements for

new land disposal units, or

 

2) the principal hazardous constituents in the treated wastes are of very low

mobility, or,

 

3) where wastes have not been treated and the principal hazardous constituents in the

wastes are of very low mobility, (i) the CAMU meets the liner standards for new,

replacement, or laterally expanded CAMUs (i.e., those in the amendments to 264.552(e)

in this discussion paper) or (ii) the CAMU provides substantially equivalent

protection.

 

(c) The treatment required by the treatment standards must be completed prior to, or within a

reasonable time after, placement in the CAMU.

 

(d) For the purpose of determining whether wastes placed in CAMUs have met site-specific treatment

standards, the Director may, as appropriate, specify a subset of the principal hazardous constituents

in the waste as analytical surrogates for determining whether treatment standards have been met for

other principal hazardous constituents. This specification will be based on the degree of difficulty

of treatment and analysis of constituents with similar treatment properties.

 

* Under (c), the requirement to complete treatment within "a reasonable time" after placement in a CAMU

would be made in the context of the remedy selected for the waste. The Agency would expect treatment

to be completed within months or years, not decades, except in very unusual circumstances.

 

* EPA would take comment on the appropriateness of using leaching tests other than the TCLP for

assessing whether 90% reduction has been met for metals under (a)(2).

 

 

* Adjustment factor #1 would include the concepts of the current "unachievable" LDR variance

(268.44(h)(1)) and the "technically inappropriate" variance (268.44(h)(2)(i)), as well as the more

traditional concepts of technical impracticability (technically infeasible or inordinately costly).

 

* Adjustment factor #2 would allow for adjusting treatment up or down, if cleanup levels developed for

the site are significantly higher or lower than the levels required under (a). When applying the

adjustment factor, comparisons would be to levels (either established site-specifically or promulgated

under state or federal law) that assume there is direct exposure of a receptor to the constituents.

Site-specific cleanup standards are typically derived after consideration of factors that influence

the risk potential at the site, including fate and transport considerations (e.g., in setting levels

in soils that are protective of groundwater), distinctions between residential, industrial and other

types of land use, and location of potential receptors. However, protection offered by the

engineering of the CAMU itself would not be included in the calculation of adjusted treatment

standards. Adjustment #2 would include the concepts of the current "site-specific minimize threat"

LDR variance (Section 268.44(h)(3)).

 

* With respect to adjustment factor #5(A), some treatment technologies will "substantially," but not

precisely, attain 10 x UTS or 90% treatment of all principal hazardous constituents in the waste.

Where the mobility of the constituents is very low, on a site-specific basis, it can be appropriate to

consider that the "substantially met" treatment is protective of human health and the environment.

For example, the most appropriate technology at a site for organic contaminants that have low

migration potential (e.g., certain polyaromatic hydrocarbons) might be biodegradation. This

technology might come close to, but not achieve, 10 x UTS. Given that the contaminants have a low

migration potential, the Director could assess site-specific factors that affect mobility, including

the geologic setting, precipitation and evaporation, and make the determination that the CAMU would

provide long-term protection of human health and the environment. In another example, the treatment

standards would be substantially met where the overwhelming majority of constituents have been treated

to meet the treatment standards, but a very few immobile constituents do not meet the standards.

 

* For many waste streams with multiple constituents, treatment can be analytically assessed by measuring

the concentrations of a subset of constituents that are determined site-specifically. This

"surrogate" approach is commonly used in cleanups, taking into account such factors as characteristics

of the waste, ability to analyze and which constituents within groups with similar treatment

properties are most difficult to treat (these are generally the ones to focus on).

 

 

IV Design Standards

 

Location: probably after or as a modification to 264.552(e).

 

CAMUs, other than temporary CAMUs, into which wastes are placed must be designed in accordance with

the following:

 

(a) Liners.

 

 

(1) Unless the Director approves alternate requirements under paragraph (2), CAMUs that

consist of new, replacement, or laterally expanded units must include a composite liner and a

leachate collection system that is designed and constructed to maintain less than a 30-cm depth

of leachate over the liner. For purposes of this section, composite liner means a system

consisting of two components; the upper component must consist of a minimum 30-mil flexible

membrane liner (FML), and the lower component must consist of at least a two-foot layer of

compacted soil with a hydraulic conductivity of no more than 1x10-7 cm/sec. FML components

consisting of high density polyethylene (HDPE) must be at least 60 mil thick. The FML component

must be installed in direct and uniform contact with the compacted soil component;

 

(2) Alternate Requirements. The Director may approve alternate requirements: (i) if the

Director finds that alternate design and operating practices, together with location

characteristics, will prevent the migration of any hazardous constituents into the ground

water or surface water at least as effectively as the liner and leachate collection systems in

paragraph (1); or (ii), if the CAMU is to be established in an area with existing significant

levels of contamination, and the Director finds that an alternative design, including a design

that does not include a liner, would prevent migration from the unit that would exceed long-

term remedial goals.

 

(b) Cap.

 

(1) At final closure of the CAMU, the owner or operator must cover the CAMU with a final cover

designed and constructed to meet the following performance criteria, except as provided in

(2):

 

(A) Provide long-term minimization of migration of liquids through the closed unit;

 

(B) function with minimum maintenance;

 

(C) promote drainage and minimize erosion or abrasion of the cover;

 

(D) accommodate settling and subsidence so that the cover's integrity is maintained;

and

 

(E) have a permeability less than or equal to the permeability of any bottom liner system

or natural subsoils present.

 

(2) The Director may determine that modifications to (1) are needed to facilitate treatment or

the performance of the CAMU (e.g., to promote biodegradation).

 

(c) CAMUs into which wastes are placed with constituent levels below remedial levels or goals

applicable to the site do not have to comply with (a),(b), [groundwater monitoring requirements] or

[provisions for temporary CAMU design standards].

 

Groundwater Monitoring and Corrective Action -- Modifications to existing language in CAMU rule in italics:

 

 

264.552(e) The RA shall specify, in the permit or order, requirements for CAMUs to include the

following:

(3) Requirements for ground water monitoring and corrective action that are sufficient to:

(i) Continue to detect and to characterize the nature, extent, concentration, direction and movement

of existing releases of hazardous constituents in ground water from sources located within the CAMU;

(ii) Detect and subsequently characterize releases of hazardous constituents to ground water that may

occur from areas of the CAMU in which wastes will remain in place after closure of the CAMU; and

(iii) Require notification and corrective action, as necessary to protect human health and the

environment, for releases to groundwater from the CAMU.

 

* The approach in provision (c) ("CAMUs into which wastes are placed with constituent levels below

remedial levels or goals applicable to the site do not have to comply with (a) or (b)") would allow

wastes with contaminant concentrations that are protective of human health and the environment to be

placed on the ground without engineering controls. This approach is consistent with the Agency's

"contained-in" policy.

 

* The liner standard contains a provision allowing the Director to approve alternate designs that are

determined to be at least as effective at preventing migration of any hazardous constituents into the

ground or surface water. This provision is necessary to provide flexibility for designs that take into

account local factors, including state design protocols and availability of construction materials.

In addition, flexibility in liner design is also needed for CAMUs that are established at certain

highly contaminated facilities. For example, at some highly contaminated facilities where

contamination is pervasive throughout the subsurface, and where groundwater pump and treat is

predicted to be necessary for hundreds of years, a liner to reduce migration of constituents from the

CAMU into the more highly contaminated subsurface would not add a meaningful additional level of

protection and would not be the best use of remediation resources.

 

* Groundwater monitoring and corrective action standards are general performance standards; detailed

specifications or performance standards would be included in the permit or order, based on site-

specific information and conditions.

 

V Temporary CAMUs

 

CAMUs into which wastes are placed for storage or for treatment only must be approved under the CAMU

requirements (264.552); however, the treatment requirements in 264.552(e) would not apply for the

limited period while wastes are in the temporary unit. The design, operating and closure standards in

264.552(c), 264.552(e)(3) and 264.552(e)(4) would be replaced by the following design, operating and

closure standards in the staging pile regulations: 264.554(d); 264.554(e); 264.554(f); 264.554(h);

264.554(i); 264.554(j); 264.554(k).

 

* Although the treatment requirements in 264.552(e) would not apply, the Director would not be

prevented from requiring treatment in a temporary CAMU; nothing in this language would prevent the

Director from requiring treatment for waste in a temporary CAMU as part of the overall CAMU or remedy

decision.

 

 

* Temporary CAMUs that operate pursuant to the above-referenced design, operating and closure standards

in the staging pile regulations could only operate for two years, except when granted an extension

(see 264.554(d)(1)(iii) and 264.554(i)).

 

* Temporary CAMUs that will operate for a period that exceeds two and a half years would be subject to

the liner and groundwater monitoring requirements (including corrective action) for permanent CAMUs.

The authorizing mechanism for the CAMU (i.e., permit or order) would specify the time limit for the

CAMU. The regulations would provide that this time limit could be no longer than necessary to achieve

a timely remedy selected for the waste. The preamble would state the Agency's general expectation

that storage or treatment activities in such non-permanent CAMUs would be completed within years not

decades, except in very unusual circumstances.

 

VI CAMU Omnibus Provision

 

Notwithstanding any other provision of this section, the Director may impose additional requirements

as necessary to protect human health and the environment.

 

 

* Where the omnibus finding is made, this provision would enable the Director to impose requirements

relating to any element of CAMUs, including: requiring additional treatment of PHCs beyond the

minimum standards; requiring additional engineering or monitoring specifications; and prohibiting

specific wastes from inclusion in the CAMU.

 

VII Grandfathering

 

The rule would "grandfather" all existing, approved CAMUs, and those that are substantially in the

approval process. Rule would provide that existing CAMUs and those with substantially complete

applications (and order equivalents) submitted within 90 days after publication of the proposed rule

would be grandfathered (i.e., remain subject to the current standards for the life of the CAMU). CAMU

waste, activities and design would not be subject to the new standards as long as the waste,

activities, and design remain within the general scope of the grandfathered CAMU.

 

VIII Public Participation

 

Replace existing 264.552(f) with:

 

264.552(f): The Regional Administrator shall provide public notice and a reasonable opportunity for

public comment before designating a CAMU. Such notice shall include the rationale for any proposed

adjustments under [x] to the treatment standards in [x].

 

* Public involvement in the corrective action program is currently being discussed as part of EPA's RCRA

Cleanup Reforms. Public participation in the CAMU process will be informed by this initiative. In

addition, EPA will take comment on whether to apply the RCRA enhanced public participation regulations

(60 FR 63417, 12/11/95) to CAMU decisions.

 

The following represents the general approach that the Agency intends to propose for implementing state

authorization of the CAMU amendments. The following language is not part of the CAMU settlement agreement.

 

State Authorization

 

States authorized for CAMU rule: Goal would be to ensure that such states apply for and obtain authorization

for rule amendments (which will be promulgated pursuant to HSWA) within a reasonable time frame, while

allowing them to implement the new standards in lieu of EPA in the interim.

 

* Interim authorization by rule. EPA would propose that State programs that are able and willing to use

amendments as guidance while they apply for and await final authorization would be "substantially

equivalent" to the federal CAMU program and thus would obtain interim authorization by rule (assuming

the state does not have unresolved audit law issues) to implement the amendments during that period.

 

* The interim authorization approach would be proposed in the CAMU proposal, with the intent that

interim authorizations would become effective on the same day that the CAMU amendments become

effective. The rule would contain a sunset provision - states that do not obtain final authorization

within three years would lose their interim authorization. EPA would then implement the CAMU

amendments in such states.

 

* States that do not wish to obtain interim authorization in accordance with the above (i.e., states

that are not able and willing to use the amendments as guidance) could take advantage of the expedited

authorization approach designed for states that are authorized for corrective action but not the CAMU

rule (see below).

 

States authorized for corrective action, but not CAMU: Goal would be to create an expedited approach to

authorizing such states for the CAMU rule.

 

* Streamlined application requirements: Rule would reduce the current authorization application

requirements (40 CFR 271.21) to revised Attorney General's statement of authority and submission of

relevant authorities. This would eliminate requirements for revised program description and revised

MOA.

 

* In addition, Agency would make authorization of such states for the CAMU rule a high priority. Where

states incorporate CAMU rule by reference or adopt it verbatim, EPA, upon receipt of an application,

would immediately proceed to publish a notice of a direct-finalF

Under a "direct-final" rulemaking approach, the Agency publishes

notices of proposed and final rules simultaneously. If the Agency

does not receive significant comments on the proposal within a

specified period (typically 60 days), the final rule takes effect. If

the Agency does receive significant comment during that period, the

Agency withdraws the notice of final rule before it takes effect.

F rule providing for final

authorization (or, in some cases, interim authorization). An exception to this policy would be where

in the Region's judgment known issues with the existing program greatly affect the program's prospects

for authorization. Examples of such issues would be questions regarding a state's enforcement

 

authority (e.g., audit law issues) or capability (e.g., resource issues). For states that do not

incorporate by reference or adopt verbatim, Regions would be directed to act as quickly as possible to

get to final authorization.

 

* This approach would only be available where the program seeking authorization is the same program that

has been authorized for corrective action.

 

For more information see: http://www.epa.gov/epaoswer/osw/cleanup.htm.

This page was last changed on 08/01/04