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                                                                    Exhibit 4.18

                                                                  EXECUTION COPY


                              FOURTH AMENDMENT TO
                        THE REGISTRATION RIGHTS AGREEMENT



            THIS FOURTH AMENDMENT TO THE REGISTRATION RIGHTS AGREEMENT (this
"Amendment") is made effective as of the 10th day of June, 1996, by and among
The Cerplex Group, Inc., a Delaware corporation (the "Company"), the investors
listed on Schedule A hereto, each of which is herein referred to as an
"Investor" and collectively as the "Investors," the security holders of the
Company listed on Schedule B hereto, each of which is herein referred to as a
"Stockholder" and collectively as the "Stockholders," the banks listed on
Schedule C hereto, each of which is herein referred to as a "Bank Holder" and
collectively as the "Bank Holders" and each of the parties listed on Schedule D
hereto, each of which is herein referred to as a "Series B Preferred Holder" and
collectively as the "Series B Preferred Holders."

                                    RECITALS:

            A. The Company, the Investors, the Stockholders, and certain other
investors and stockholders entered into a Registration Rights Agreement dated
November 19, 1993 (as in effect prior to the effectiveness of this Amendment,
the "Existing Registration Rights Agreement").

            B. Pursuant to a Waiver and Amendment Agreement, dated as of April
15, 1996, among The Northwestern Mutual Life Insurance Company, John Hancock
Mutual Life Insurance Company and North Atlantic Smaller Companies Investment
Trust PLC (each individually, a "Warrant Group Holder" and collectively, the
"Warrant Group Holders") and the Company, and a Warrant Agreement dated as of
April 15, 1996, among the Warrant Group Holders and the Company, the Company
issued one million (1,000,000) warrants (the "1996 Warrants") to purchase Common
Stock (as such term is defined in the Existing Registration Rights Agreement) to
the Warrant Group Holders.

            C. Pursuant to a First Amendment to Credit Agreement and Limited
Waiver (the "Bank Amendment and Waiver Agreement"), dated as of April 15, 1996,
among the Company, Wells Fargo Bank, National Association, as Administrative
Agent, and the Bank Holders and a Warrant Agreement (the "Bank Warrant
Agreement"), dated as of April 15, 1996, among the Company and the Bank Holders,
the Company issued one hundred twenty-five thousand (125,000) warrants (the
"Bank Warrants") to purchase Common Stock (as such term is defined in the
Existing Registration Rights Agreement) to the Bank Holders.


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            D. Pursuant to the Third Amendment to the Existing Registration
Rights Agreement, dated as of April 15, 1996, by and among the Company, the
Investors, the Stockholders and the Bank Holders, the shares of Common Stock
issuable upon exercise of the Bank Warrants and the 1996 Warrants have been made
subject to the Existing Registration Rights Agreement.

            E. The Company and the Series B Preferred Holders (as defined
herein) are parties to the Stock Purchase Agreement of even date herewith (the
"Series B Agreement") pursuant to which Series B Preferred Holders have
purchased an aggregate of 8,000 shares of the Company's Series B Preferred
Stock; and in order to induce the Company and the Series B Preferred Holders to
enter into the Series B Agreement, the Series B Preferred Holders and the
Company hereby agree that the Existing Registration Rights Agreement as hereby
amended shall govern the rights of the Series B Preferred Holders to cause the
Company to register shares of Common Stock issuable to the Series B Preferred
Holders upon the conversion of the Series B Preferred Stock and certain other
matters set forth herein.

            F. The parties to the Existing Registration Rights Agreement wish to
amend the terms thereof to (i) permit the Bank Holders certain additional rights
hereunder and (ii) permit the Series B Preferred Holders certain rights.

                                   AGREEMENT:

            NOW THEREFORE, for valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

            SECTION 1. DEFINED TERMS

            Terms used herein without definition shall have the meaning given
such terms in the Existing Registration Rights Agreement. The terms specified
below are hereby incorporated, as applicable, into the Existing Registration
Rights Agreement. As used in this Amendment, the following terms have the
respective meanings specified below:

            "ADDITIONAL SHARES" -- has the meaning given such term in Section
            1.2(b) of the Existing Registration Rights Agreement, as amended
            hereby

            "AMENDMENT, THIS" -- means this Fourth Amendment to the Existing
            Registration Rights Agreement

            "DEFICIENCY" -- has the meaning given such term in Section 1.2(f) of
            the Existing Registration Rights Agreement, as amended hereby

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            "EFFECTIVENESS PERIOD" -- has the meaning given such term in Section
            1.19(a) of the Existing Registration Rights Agreement, as amended
            hereby

            "EXCESS SHARES" -- has the meaning given such term in Section 1.2(f)
            of the Existing Registration Rights Agreement, as amended hereby

            "EXISTING REGISTRATION RIGHTS AGREEMENT" -- Recital A

            "NASD" means the National Association of Securities Dealers, Inc.

            "NON-INITIATING HOLDER" -- has the meaning given such term in
            Section 1.2(b) of the Existing Registration Rights Agreement, as
            amended hereby

            "NON-REQUESTING HOLDER" -- has the meaning given such term in
            Section 1.12(f) of the Existing Registration Rights Agreement, as
            amended hereby

            "SELLING GROUP" -- shall have the meaning given such term in Section
            1.6

            "SERIES B AGREEMENT" -- Recital E

            "SHELF REGISTRATION" -- has the meaning given such term in Section
            1.19(a) of the Existing Registration Rights Agreement, as amended
            hereby

            "SHORTAGE" -- shall have the meaning given such term in Section
            1.2(b) of the Existing Registration Rights Agreement, as amended
            hereby

            "SHORTFALL" -- has the meaning given such term in Section 1.2(b) of
            the Existing Registration Rights Agreement, as amended hereby

            "SPROUT" -- means (a) (x) The Sprout Group, and any affiliates
            thereof, Sprout Growth II, L.P., or (y) DLJ Capital Corporation or
            any subsidiaries or affiliates thereof, as the case may be, for so
            long as it holds any warrants on the date hereof issued pursuant to
            the Existing Registration Rights Agreement (the "Original Sprout
            Warrants") or any Common Stock issued pursuant to the exercise of
            such Warrants and (b) any successors thereto or direct or successive
            transferees thereof; it being the intention of the parties hereto
            that any successive holder of a warrant, or the Common Stock issued
            upon the exercise of such warrant, which warrant derived from an
            Original Sprout Warrant, shall be included in this definition,
            provided that any holder of shares of Common Stock issued upon the
            exercise of any Original Sprout Warrant or any warrant that derived
            from such Original Sprout Warrant which shares have been, or derive
            from shares that have been, publicly sold pursuant to a registration
            statement filed under the Act or

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            pursuant to Rule 144 shall, to the extent of its holdings of such
            shares, be excluded from this definition. Rights under this
            Agreement of successors, assigns and transferees of Sprout Holders
            are subject to compliance with the requirements of Section 1.13 of
            the Existing Registration Rights Agreement.

            SECTION 2. AMENDMENTS

            2.1 AMENDMENTS TO SECTION 1.1 OF THE EXISTING REGISTRATION RIGHTS
            AGREEMENT

            (A) Section 1.1 of the Existing Registration Rights Agreement is
hereby amended by amending and restating the following definition, in its
entirety, as set forth below:

                (Q) The term "Registrable Securities" means

                    (i) the Common Stock currently issued to the Investors and
            the Stockholders,

                    (ii) all Common Stock issued or issuable to the Investors,
            the Stockholders, the Bank Holders and the Series B Preferred
            Holders upon exercise or conversion, as the case may be, of the
            Warrants, the Bank Warrants, other warrants, options or the Series B
            Preferred Stock held by them, and

                    (iii) all Common Stock issued (or issuable upon the exercise
            or conversion, as the case may be, of any Warrant, any Bank Warrant,
            any other warrant, option or the Series B Preferred Stock, any right
            or any other security, which Warrant, Bank Warrant, Series B
            Preferred Stock, other warrant, right, any other security or option
            is itself issued) as a dividend or other distribution with respect
            to, or in exchange for or in replacement of, the shares of Common
            Stock referenced in (i) and (ii) above,

            excluding in all cases, however, any Registrable Securities sold by
            a person in a transaction in which his rights under this Section 1
            are not assigned.

            (B) The following definitions are hereby added to Section 1.1 of the
Existing Registration Rights Agreement so as to preserve the alphabetical
ordering of the definitions set forth therein.

                        The term "Series B Preferred Holders" means (a) each of
            the entities, or persons, as the case may be, set forth on Schedule
            D hereto, for so long as they hold any shares of Series B Preferred
            Stock or any Common Stock issued pursuant to the conversion of such
            shares and (b) any successors thereto or direct or successive
            transferees thereof; it being the intention of the parties hereto
            that any successive holder of Series B Preferred

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            Stock, or the Common Stock issued upon the conversion of such Series
            B Preferred Stock, shall be included in this definition, provided
            that any Holder of shares of Common Stock issued upon the conversion
            of any share of Series B Preferred Stock that has been, or derives
            from any share that has been, publicly sold pursuant to a
            registration statement filed under the Act or pursuant to Rule 144
            shall, to the extent of its holdings of such shares, be excluded
            from this definition.

                        Any decisions to be made by the Series B Preferred
            Holders shall be made upon a vote of a majority in interest of
            Series B Preferred Holders on the basis of the number of shares of
            Common Stock issuable upon conversion of Series B Preferred Stock
            and the number of shares of such Common Stock then held. Rights of
            successors, assigns and transferees of Series B Preferred Holders
            are subject to compliance with the requirements of Section 1.13.

                        The term "Series B Preferred Stock" means that certain
            series of Preferred Stock designated Series B, having par value of
            $0.001 per share, enjoying the rights and privileges set forth in
            that Certificate of Designation of the Company as in effect on the
            date hereof.

            2.2         AMENDMENTS TO SECTION 1.2

            (A) Section 1.2(a) of the Existing Registration Rights Agreement is
hereby amended by deleting the word "and" at the end of clause (ii), by deleting
the period at the end of clause (iii) and replacing it with a semi-colon, and by
adding the following clauses after clause (iii):

               (iv) the Bank Holders may request one (1) registration under this
            Section 1.2; and

               (v) the Series B Preferred Holders may request one (1)
            registration under this Section 1.2.

            (B) Section 1.2(b) of the Existing Registration Rights Agreement is
hereby amended to delete the first full paragraph and such paragraph is restated
in its entirety as follows:

                        If the Initiating Demand Holder in respect of any
            registration requested under this Section 1.2 intends to distribute
            the Registrable Securities covered by its request by means of an
            underwriting, it shall so advise the Company as a part of its
            request made pursuant to subsection 1.2(a) and the Company shall
            include such information in the written notice referred to in
            subsection 1.2(a)(A). The underwriter will be one or more
            underwriting firms of recognized national standing selected, after
            consultation with the Initiating Demand Holder, by the Company and
            shall be acceptable to the Initiating

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            Demand Holder, which shall not unreasonably withhold its acceptance
            of such underwriters, provided that any Original Warrantholder,
            Independent Equity Group Holder or Series B Preferred Holder that
            constitutes, in whole or part, the Initiating Demand Holder may
            require the managing underwriter so selected above to invite not
            more than one (1) underwriter selected by such Original
            Warrantholder, Independent Equity Group Holder or Series B Preferred
            Holder to join the selling syndicate in respect of such
            registration. In such event, the right of any Holder to include his
            Registrable Securities in such registration shall be conditioned
            upon such Holder's participation in such underwriting and inclusion
            in the underwriting of the Registrable Securities of such Holder in
            such registration (unless otherwise mutually agreed by the
            Initiating Demand Holder and such Holder) to the extent provided
            herein. All Holders proposing to distribute their securities through
            such underwriting shall (together with the Company as provided in
            subsection 1.4(e)) enter into an underwriting agreement in customary
            form with the underwriter or underwriters selected for such
            underwriting, all as contemplated by subsection 1.4(e).
            Notwithstanding any other provision of this Section 1.2, if the
            underwriter advises the Initiating Demand Holder that the number of
            securities requested to be included in such registration exceeds the
            number that can be sold in such offering within a price range
            acceptable to the Initiating Demand Holder (such advice to state the
            basis of such opinion and the approximate number of shares of
            Registrable Securities that may be included in such offering without
            such effect), then the Initiating Demand Holder shall so advise all
            Holders of Registrable Securities which would otherwise be included
            in such registration pursuant hereto, and the number of shares of
            Registrable Securities that may be so included shall be allocated as
            follows:

                                    (i) All of the Registrable Securities of the
                        Initiating Demand Holder and each member (or who derived
                        their ownership of Registrable Securities after the date
                        hereof from such Holder) of the applicable group (as set
                        forth in Section 1.2(a)(i) through and including
                        1.2(a)(v) (a "group") to which such Holder belongs,
                        shall first be included in such registration; provided,
                        however, in the event the number of Registrable
                        Securities requested to be included in such Registration
                        by the Holders in such group exceeds the number of
                        shares which may be included in such registration, such
                        allocation shall be made among the Holders of such group
                        pro rata based upon the number of Registrable Securities
                        owned by each such Holder. For the purposes of
                        determining to which group Sprout belongs any Original
                        Sprout Warrant received, or the Common Stock received
                        upon the exercise thereof, shall, if applicable, be
                        included in the Independent Equity Group and any shares
                        of Series B Preferred Stock, or Common Stock received
                        upon the conversion thereof, shall be included, if
                        applicable, with those of the Series B Preferred
                        Holders; and


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                                    (ii) in the event that the number of
                        Registrable Securities includable in such registration
                        exceeds the number of Registrable Securities includable
                        therein pursuant to the foregoing clause (i) (such
                        securities "Additional Shares"), then in such case, such
                        Additional Shares shall be allocated to the Holders of
                        Registrable Securities which are not members of the
                        group to which the Initiating Demand Holder belongs but
                        which have requested inclusion in the registration (the
                        "Non- Initiating Holders") on a pro rata basis (as
                        nearly as practicable) based on the number of
                        Registrable Securities held by each. In the event this
                        clause (ii) is applicable, and for purposes of effecting
                        the calculations provided for herein, the number of
                        Registrable Securities owned by all of the Primary
                        Stockholders as a group shall be deemed to be equal to
                        the number of Registrable Securities owned by the
                        Investors as a group (not counting for this purpose any
                        Investor that is a member of the group to which the
                        Initiating Demand Holder belongs and any Common Stock
                        issued, or issuable, upon conversion of the Series B
                        Preferred Stock owned by Sprout). As such, each Primary
                        Stockholder who is a Non- Initiating Holder shall be
                        deemed for the purposes of the computations in this
                        paragraph to own a proportionately smaller number of
                        shares. In addition, to the extent the Registrable
                        Securities in respect of the 1996 Warrants result in an
                        allocation of Additional Shares to the Independent
                        Equity Group under this clause (ii) that is less than it
                        would have been if there had been no issuance of 1996
                        Warrants (such deficiency is referred to herein as the
                        "Shortfall"), the Primary Stockholders will be deemed,
                        for purposes of this clause (ii), to have assigned to
                        the Independent Equity Group a number of Additional
                        Shares that would have otherwise been allocated to such
                        Primary Stockholders equal to 50% of such Shortfall.

            The number of shares of Registrable Securities to be included in
            such underwriting shall not be reduced unless all other securities
            (including, without limitation, any securities of the Company or any
            other person then included in such registration, as contemplated by
            the immediately succeeding sentence) are first entirely excluded
            from the underwriting. The Company will not register securities for
            sale for the account of any person other than Holders of Registrable
            Securities participating in such registration and the Company in
            connection with any registration pursuant to this Section 1.2 unless
            it shall have obtained the prior written consent of the Initiating
            Demand Holder or unless the requirements of Section 1.14 have been
            fully satisfied in respect of such other securities. Upon receipt of
            such consent, the Company will notify each Holder of Registrable
            Securities requesting participation in such registration of such
            consent.



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            (c) Section 1.2(d) of the Existing Registration Rights Agreement is
hereby amended so that clause "(ii)" shall be renumbered as clause "(iii)" and
the following clause shall be added as clause "(ii)":

                        A registration statement effected pursuant to Section
            1.19 shall not preclude a request or a demand under Section 1.2 or a
            registration, public offering or distribution in respect thereof.
            The Holders acknowledge and agree that upon the receipt from a
            Holder of a request under Section 1.2, no other request under this
            Section 1.2 or Section 1.12 need be honored by the Company pending
            the discharge or withdrawal of such request, and the first such
            request under this Section 1.2 or Section 1.12, as the case may be,
            shall preempt all other such requests until such time as the
            procedures and processes that commence upon the receipt of such
            request shall have been completed in a manner consistent with the
            intent hereof or such request is withdrawn.

            2.3 AMENDMENT TO SECTION 1.3 OF THE EXISTING REGISTRATION RIGHTS
AGREEMENT

            Section 1.3 of the Existing Registration Rights Agreement is hereby
amended to add "(i)" before the word "If" in the first sentence of Section 1.3
and to add the following paragraph as Section 1.3(b):

                                    (b) In the event that the Company has filed,
            or files, a registration statement within thirty (30) days of
            receipt of a notice under Section 1.2 or 1.12, pursuant to this
            Section 1.3, then the Company shall not be required to honor any
            demand under Section 1.2 or 1.12 until the earlier of (i) one
            hundred twenty days following the date of such notice or (ii) such
            date as the Company is no longer using its best efforts to effect
            such offering (including, without limitation, the date the Company
            withdraws such registration statement).

            2.4 AMENDMENT TO SECTION 1.4(E) OF THE EXISTING REGISTRATION RIGHTS
AGREEMENT

            Section 1.4(e) of the Existing Registration Rights Agreement is
hereby amended to add ", Bank Holders or Series B Preferred Holders" after the
word "Investors" but before the word "shall" in the last sentence of Section
1.4(e).

            2.5 AMENDMENT TO SECTION 1.6 OF THE EXISTING REGISTRATION RIGHTS
AGREEMENT

            Section 1.6 of the Existing Registration Rights Agreement is hereby
amended so that all of the words from "All expenses" up to, but not including
"provided, however," are deleted and replaced with the following:

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                        All expenses other than underwriting discounts and
            commissions incurred in connection with registrations, filings or
            qualifications pursuant to Section 1.2, Section 1.12 and Section
            1.19, including (without limitation) all registration, filing and
            qualification fees of the Act and any other securities or Blue Sky
            laws, printers and accounting fees, fees and disbursements of
            counsel for the Company and the Stockholders and the reasonable and
            customary fees and disbursements of one counsel for the selling
            Investors, Bank Holders and Series B Preferred Holders
            (collectively, the "Selling Group") (excluding, however, any fees
            and disbursements for special counsel for the Holders other than
            such one counsel for the Selling Group; the Selling Group shall
            appoint its counsel by a two-thirds vote of the Registrable
            Securities of those Holders who are members of the Selling Group
            then participating in such registration) shall be borne and paid by
            the Company (which right in favor of the Holders is assignable by
            the Holders as provided in Section 1.13);

            2.6 AMENDMENT TO SECTION 1.7 OF THE EXISTING REGISTRATION RIGHTS
AGREEMENT

            Section 1.7 of the Existing Registration Rights Agreement is hereby
amended so that the words "selling Investors" are deleted and replaced with the
words "Selling Group" and the words "such Investors" are replaced with "members
of the Selling Group."

            2.7 AMENDMENT TO SECTION 1.8 OF THE EXISTING REGISTRATION RIGHTS
AGREEMENT

            Section 1.8 of the Existing Registration Rights Agreement shall be
deleted and restated in its entirety as follows:

            1.8 Underwriting Requirements.

                  (a) In connection with any offering involving an underwriting
            of securities of the Company referred to in Section 1.3, the Company
            shall not be required under said Section 1.3 to include any of the
            Holders' Registrable Securities in such underwriting unless such
            Holders accept the terms of the underwriting as agreed upon between
            the Company and the underwriters selected by it (or by other persons
            entitled to select the underwriters), and then only in such quantity
            as such underwriters determine in their sole discretion will not
            jeopardize the success of the offering by the Company. If the total
            amount of securities (other than securities to have been originally
            offered under such offering by the Company for its own account or
            for the account of persons other than the Holders) requested by
            holders of such securities (including Registrable Securities
            requested by the Holders) to be included in such offering (with
            respect to any such offering, the "piggyback securities") exceeds
            the amount of securities that the underwriters determine in their
            sole discretion can be sold without jeopardizing the success of the
            sale of such originally offered securities, then the Company shall
            be

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            required to include in such offering only that number of such
            piggyback securities, including Registrable Securities, which the
            underwriters reasonably determine in their sole discretion will not
            jeopardize the success of the sale of said originally offered
            securities (the piggyback securities to be so included in such
            offering to be apportioned among the Holders (or who derived their
            ownership of Registrable Securities after the date hereof from
            Holders) on a pro rata basis, in proportion (as nearly as
            practicable) to the amount of Registrable Securities owned by each
            such Holder to the piggyback securities, provided, however, that for
            purposes of such determination, the number of Registrable Securities
            owned by all of the Primary Stockholders as a group shall be deemed
            to be equal to the number of Registrable Securities owned by the
            Investors as a group (not counting for this purpose any Series B
            Preferred Stock, or Common Stock issued or issuable upon the
            conversion thereof, owned by Sprout). As such, each Primary
            Stockholder shall be deemed for the purposes of such calculations to
            own a proportionately smaller number of shares. In addition, to the
            extent the Registrable Securities in respect of the 1996 Warrants
            result in an allocation of piggyback securities to the Independent
            Equity Group under this Section 1.8 that is less than it would have
            been if there had been no issuance of 1996 Warrants (such deficiency
            is referred to herein as the "Shortage"), the Primary Stockholders
            will be deemed, for purposes of this Section 1.8, to have assigned
            to the Independent Equity Group a number of piggyback securities
            that would have otherwise been allocated to such Primary
            Stockholders equal to 50% of such Shortage.

            2.8 AMENDMENT TO SECTION 1.10(A) OF THE EXISTING REGISTRATION RIGHTS
AGREEMENT

            Section 1.10(a) of the Existing Registration Rights Agreement is
amended so that the phrase ", Bank Holders or Series B Preferred Holders" is
included in the first parenthetical after the word "Investors" and before the
comma which follows the word "Investors."

            2.9 AMENDMENT TO SECTION 1.12 OF THE EXISTING REGISTRATION RIGHTS
AGREEMENT

            (a) Section 1.12(a) of the Existing Registration Rights Agreement is
hereby amended and restated in its entirety as follows:

                  1.12 Form S-3 Registration. (a) One or more Holders (such
            Holders are, with respect to each request made by them under this
            Section 1.12, referred to collectively as a "Requesting Holder") may
            make written requests of the Company to effect a registration on
            Form S-3 and any related qualification or compliance with respect to
            all or a part of the Registrable Securities owned by such Requesting
            Holder, provided that such Requesting Holder belongs to one or more
            of the following: the Northwestern Group Holders, the Hancock Group
            Holders, the Independent Equity Group Holders, the Primary
            Stockholders, Bank Holders or Series B Preferred Holders.

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            (b) Section 1.12 of the Existing Registration Rights Agreement is
hereby amended to include the following as "Section 1.12(g)":

                        A registration statement effected pursuant to Section
            1.19 shall not preclude a request or a demand under Section 1.12 or
            a registration, public offering or distribution in respect thereof.
            The Holders acknowledge and agree that upon the receipt from a
            Holder of a request under Section 1.12, no other request under this
            Section 1.12 or Section 1.2 need be honored by the Company pending
            discharge or withdrawal of such request, and the first such request
            under this Section 1.12 or Section 1.2, as the case may be, shall
            preempt all other such requests until such time as the procedures
            and processes that commence upon the receipt of such request shall
            have been completed in a manner consistent with the intent hereof or
            such request is withdrawn.

            (c) Section 1.12(b)(ii)(D) of the Existing Registration Rights
Agreement is amended to add the following language after "Section 1.12" and
before the ";

            provided, however, that in no event shall a registration effected
            pursuant to Section 1.12(a) be counted for the purposes of this
            Section 1.12(b)(ii)(D) if such firmly underwritten registration
            statement on Form S-3 was initiated by a Bank Holder or a Series B
            Preferred Holder as a "Requesting Holder" under Section 1.12.

            (d) Section 1.12(b)(ii)(E) of the Existing Registration Rights
Agreement is hereby amended so that "five (5)" is deleted and replaced with
"seven (7)."

            (e) Section 1.12(b)(ii)(F) of the Existing Registration Rights
Agreement shall be amended:

                (F) if the Company has, within the 90-day period preceding the
            date of such request, already effected an underwritten registration
            statement.

            (f) Section 1.12(f)(i) and (ii) are hereby amended and restated in
their entirety as follows:

                (i) All of the Registrable Securities of the Requesting Holder
            and each member (or who derived their ownership of Registrable
            Securities after the date hereof from such Holder) of the applicable
            group (as set forth in Section 1.12(a) (a "group")) to which such
            Holder belongs, shall first be included in such registration;
            provided, however, in the event the number of Registrable Securities
            requested to be included in such Registration by the Holders in such
            group exceeds the number of shares which may be included in such
            registration, such allocation shall be made among the Holders of
            such group pro rata based upon the number of Registrable Securities
            owned by each such


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            Holder. For the purposes of determining to which group Sprout
            belongs any Original Sprout Warrant received, or the Common Stock
            received upon the exercise thereof, shall, if applicable, be
            included in Independent Equity Group and any shares of Series B
            Preferred Stock, or Common Stock received upon the conversion
            thereof, shall be included, if applicable, with those of the Series
            B Preferred Holders; and

                        (ii) in the event that the number of Registrable
            Securities includable in such registration exceeds the number of
            Registrable Securities includable therein pursuant to the foregoing
            clause (i) (such securities "Excess Shares"), then in such case,
            such Excess Shares shall be allocated to the Holders of Registrable
            Securities which are not members of the group to which the
            Requesting Holder belongs but which have requested inclusion in the
            registration (the "Non-Requesting Holders") on a pro rata basis (as
            nearly as practicable) based on the number of Registrable Securities
            held by each. In the event this clause (ii) is applicable, and for
            purposes of effecting the calculations provided for herein, the
            number of Registrable Securities owned by all of the Primary
            Stockholders as a group shall be deemed to be equal to the number of
            Registrable Securities owned by the Investors as a group (not
            counting for this purpose any Investor that is a member of the group
            to which the Requesting Holder belongs and any Common Stock issued,
            or issuable, upon conversion of the Series B Preferred owned by
            Sprout). As such, each Primary Stockholder who is a Non-Requesting
            Holder shall be deemed for the purposes of the computations in this
            paragraph to own a proportionately smaller number of shares. In
            addition, to the extent the Registrable Securities in respect of the
            1996 Warrants result in an allocation of Excess Shares to the
            Independent Equity Group under this clause (ii) that is less than it
            would have been if there had been no issuance of 1996 Warrants (such
            deficiency is referred to herein as the "Deficiency"), the Primary
            Stockholders will be deemed, for purposes of this clause (ii), to
            have assigned to the Independent Equity Group a number of Excess
            Shares that would have otherwise been allocated to such Primary
            Stockholders equal to 50% of such Deficiency.

            2.10 AMENDMENT TO SECTION 1.14 OF THE EXISTING REGISTRATION RIGHTS
AGREEMENT

            Section 1.14 of the Existing Registration Rights Agreement is hereby
amended so that the phrase "without the prior written consent of the Investors
holding two-thirds of the Registrable Securities held by Investors," is replaced
with the phrase "without the prior written consent of the Investors and Series B
Preferred Holders collectively holding two-thirds of the aggregate Registrable
Securities held by the Investors and the Series B Preferred Holders."

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                                                                  EXECUTION COPY

         2.11 MODIFICATION OF SECTION 1.15 OF THE EXISTING REGISTRATION RIGHTS
         AGREEMENT

         Section 1.15 is hereby modified to delete the phrase "in the case of a
nonunderwritten offering."

         2.12 ADDITION OF SECTION 1.19 TO EXISTING REGISTRATION RIGHTS AGREEMENT

         The following paragraphs are hereby added to the Existing Registration
Rights Agreement:

              1.19     Shelf Registration.

                       (a) (i) The Company shall file, not later than one
         hundred fifty (150) days after the date hereof, a "shelf" registration
         statement (the "Shelf Registration") covering the securities then
         constituting Registrable Securities (other than shares held by Holders
         who are permitted, as of June 10, 1996, to sell all their shares during
         a three (3)-month period under Rule 144 of the Act and the Registrable
         Securities of Holders who have decided not to participate in a
         registration under this Section 1.19) on any appropriate form, which
         shall state that the subject Registrable Securities are to be offered
         on a delayed or continuous basis pursuant to Rule 415 under the Act.
         The Company shall use its reasonable best efforts to have the Shelf
         Registration declared effective as soon as practicable after its filing
         and to keep the Shelf Registration continuously effective and current
         for a period of three (3) years following the date hereof or, if
         earlier, until all Registrable Securities included therein have been
         sold or can be sold within three months under Rule 144 of the Act. If
         necessary, the Company shall cause to be filed, and shall use its
         reasonable best efforts to have declared effective as soon as
         practicable following filing, additional "shelf" registration
         statements or amendments as necessary to maintain such effectiveness
         for such period. It is understood, however, that the Shelf Registration
         may be required to be amended or suspended for reasonable periods of
         time from time to time due to a variety of matters, including corporate
         developments undertaken by the Company in good faith and for valid
         business reasons such as the acquisition of third parties or the
         divestiture of assets which developments may require notice to the
         holders pursuant to Section 1.19(vii). The Holders acknowledge that
         during these periods they may not be entitled to sell under the
         registration statement filed pursuant to this Section 1.19.

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                           (ii) Within ten (10) days of the filing of a
         registration statement pursuant to this Section 1.19, the Company shall
         give written notice of such fact to all Holders (and shall deliver a
         copy of such registration statement to all Holders). Within ten (10)
         days of the receipt thereof, each Holder which desires its Registrable
         Securities to be included in such registration statement shall provide
         notice of such desire to the Company, and shall indicate the number of
         Registrable Securities it holds that it wishes to be included in such
         registration statement.

                       (b) The Holders acknowledge that the procedures section
         in the subsequent subparagraph (c) of this Section 1.19 (the
         "Procedures") shall be applicable only to the shelf registration
         described in the foregoing Subsection (a) and that to the extent that
         any other provisions of this Agreement conflict with the Procedures by
         reason of the application of this Section 1.19, the Procedures shall
         govern such Shelf Registration.

                       (c) The Company, in connection with its obligation under
         Section 1.19, shall:

                           (i) Prepare and file with the SEC such amendments and
         supplements to such registration statement and the prospectus used in
         connection therewith as may be necessary to keep such registration
         statement effective and current for the period specified in Section
         1.19(a) and comply with the provisions of the Act with respect to the
         disposition of all securities covered by such registration statement in
         accordance with the Holders intended method of disposition set forth in
         such registration statement for such period.

                           (ii) Make every reasonable effort to obtain the
         withdrawal of any order or other action suspending the effectiveness of
         any such registration statement or suspending the qualification or
         registration (or exemption therefrom) of the Registrable Securities for
         sale in any jurisdiction.

                           (iii) As soon as practicable after public disclosure
         of any matters described in subsection (a) of this Section 1.19 and in
         accordance with the Company's obligations under the 1934 Act, the Act
         or the rules of the NASD or otherwise, or as soon as practicable after
         the happening of any other event that makes any statement made in such
         registration statement or registration statements or in any related
         prospectus, prospectus supplement, amendment or document incorporated
         therein by reference untrue in any material respect or that requires
         the making of any changes in such registration statement or
         registration statements or in any such prospectus, supplement,
         amendment or other such document so that it will not contain any untrue
         statement of a material fact or omit to state any material fact
         required to be stated therein or necessary to make the

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         statements therein (in the case of any prospectus in the light of the
         circumstances under which they were made) not misleading, prepare a
         supplement or post-effective amendment to such registration statement
         or to the related prospectus or any document incorporated therein by
         reference, or file any other required document so that, as thereafter
         delivered to the purchasers of the Registrable Securities being sold
         thereunder, such prospectus shall not contain an untrue statement of a
         material fact or omit to state any material fact necessary to make the
         statements therein not misleading.

                           (iv) Furnish to each Holder of Registrable Securities
         covered by such registration statement such number of copies of such
         registration statement, each amendment and supplement thereto (in each
         case including all exhibits thereto and documents incorporated by
         reference therein), the prospectus included in such registration
         statement (including each preliminary prospectus) and such other
         documents as such Holder may reasonably request in order to facilitate
         the disposition of the Registrable Securities owned by such Holder.

                           (v) Promptly notify each Holder of Registrable
         Securities covered by such registration statement of any stop order
         issued or threatened by the SEC and take all reasonable actions
         required to prevent the entry of such stop order or to remove it if
         entered.

                           (vi) Use its best efforts to (i) register or qualify
         the Registrable Securities under such other securities or blue sky laws
         of such jurisdictions in the United States as any Holder of Registrable
         Securities covered by such registration statement shall reasonably
         request and (ii) cause such Registrable Securities to be registered
         with or approved by such other governmental agencies or authorities as
         may be necessary by virtue of the business and operations of the
         Company and to do any and all other acts and things that may be
         reasonably necessary or advisable to enable such Holder to consummate
         the disposition of the Registrable Securities owned by such Holder;
         provided that the Company will not be required to (A) qualify generally
         to do business in any jurisdiction where it would not otherwise be
         required to qualify but for this paragraph (vi), (B) subject itself to
         taxation in any such jurisdiction or (C) consent to general service of
         process in any such jurisdiction.

                           (vii) Promptly notify each Holder of Registrable
         Securities covered by such registration statement at any time when a
         prospectus relating thereto is required to be delivered under the Act,
         of the occurrence of any event as a result of which the prospectus
         contained in such registration statement, as then in effect, includes
         an untrue statement of a material fact or omits to state any material
         fact required to be stated therein or necessary to make the statements
         therein not misleading in the light of the circumstances then existing,
         and the Company will prepare a supplement or

                                       15
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                                                                  EXECUTION COPY

         amendment to such prospectus so that, as thereafter delivered to the
         purchasers of such Registrable Securities, such prospectus will not
         contain an untrue statement of a material fact or omit to state any
         material fact required to be stated therein or necessary to make the
         statements therein not misleading and promptly make available to each
         such Holder any such supplement or amendment.

                           (viii) Use its best efforts to cause all such
         Registrable Securities to be listed on each securities exchange on
         which similar securities issued by the Company are then listed, if any.

                           (ix) The Company may require each Holder of
         Registrable Securities included in such registration statement to
         promptly furnish in writing to the Company such information regarding
         distribution of the Registrable Securities as the Company may from time
         to time reasonably request and such other information as may be legally
         required in connection with such.

                       (d) The following provisions of the Existing Registration
         Rights Agreement shall be deemed deleted and inapplicable to a
         registration statement effected under this Section 1.19: Section
         1.4(i), Section 1.4(k), Section 1.4(m) and Section 1.10. In addition,
         in such event, the words "such drafts" in Section 1.4 shall be deemed
         deleted in such event, with respect to any Shelf Registration.

         2.13     ADDITION OF SECTION 1.20 TO THE EXISTING REGISTRATION RIGHTS
                  AGREEMENT

         The following paragraph is hereby added as Section 1.20 of the Existing
Registration Rights Agreement:

                  The Company agrees not to utilize its rights under any of
         Sections 1.2(c) or 1.12(b)(ii)(C) based upon a registration and/or
         public sale or distribution of Registrable Securities effected under
         Section 1.12 or Section 1.19, in the case of Section 1.2, or Section
         1.2 or Section 1.19 in the case of Section 1.12.

         2.14     AMENDMENT TO SECTION 2.7 OF THE EXISTING REGISTRATION RIGHTS
                  AGREEMENT

         Section 2.7 of the Existing Registration Rights Agreement is hereby
amended so that the phrase "the Series B Preferred Holders" is added to the
third sentence of Section 2.7 after each occurrence of the phrase "the
Independent Equity Group Holders."

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                                                                  EXECUTION COPY

         2.15     ADDITION OF SCHEDULE D TO EXISTING REGISTRATION RIGHTS
                  AGREEMENT

         Schedule D hereto is hereby added to the Existing Registration Rights
Agreement as Schedule D.

         SECTION 3.  MISCELLANEOUS

         3.1      SERIES B PREFERRED HOLDERS TO BECOME PARTIES

         Each Series B Preferred Holder by executing this Amendment shall become
a party to, and shall be obligated and bound by the provisions of, the Existing
Registration Rights Agreement, as amended by this Amendment.

         3.2 GOVERNING LAW. This Amendment shall be governed by and construed
under the laws of the State of New York as applied to agreements among New York
residents entered into and to be performed entirely within New York.

         3.3 DUPLICATE ORIGINALS. Two or more duplicate originals of this
Amendment may be signed by the parties, each of which shall be an original but
all of which together shall constitute one and the same instrument. This
Amendment may be executed in one or more counterparts and shall be effective
when at least one counterpart shall have been executed by each party hereto, and
each set of counterparts which, collectively, show execution by each party
hereto shall constitute one duplicate original.

         3.4 EFFECT OF THIS AMENDMENT. Except as specifically provided in this
Amendment, no terms or provisions of the Existing Registration Rights Agreement
have been modified or changed by this Amendment and the terms and provisions of
the Existing Registration Rights Agreement, as amended hereby, shall continue in
full force and effect. This Amendment and the amendments contained herein shall
have and be in effect on and after the date hereof upon the execution by the
Company and the required number of each of the Investors, Stockholders, Bank
Holders and Series B Preferred Holders.

         3.5 SECTION HEADINGS. The titles of the section hereof appear as a
matter of convenience only, do not constitute a part of this Amendment and shall
not affect the construction thereof.

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   18
         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed on their behalf by a duly authorized officer or agent thereof, as the
case may be, as of the date first above written.

                             THE CERPLEX GROUP, INC.


                             By:_______________________________________
                                      James T. Schraith, President

                             Address:  1382 Bell Avenue
                                       Tustin, California 92680


                             STOCKHOLDERS:


                             __________________________________________
                             William A. Klein

                             Address:  1382 Bell Avenue
                                       Tustin, California 92680



                             __________________________________________
                             Richard C. Davis

                             Address:  1382 Bell Avenue
                                       Tustin, California 92680



                             __________________________________________
                             Myron Kunin

                             Address:  Regis Corporation
                                       7201 Metro Boulevard
                                       Minneapolis, MN  55439






[Signature Page to the FOURTH AMENDMENT TO THE 1993 REGISTRATION RIGHTS
AGREEMENT among THE CERPLEX GROUP, INC. and the Investors, Stockholders, Banks
and Series B Preferred Holders listed therein.]
   19
                              STOCKHOLDERS (CONTINUED)


                              ___________________________________________
                              Theodore J. Wisniewski

                              Address:   1382 Bell Avenue
                                         Tustin, California 92680




[Signature Page to the FOURTH AMENDMENT TO THE 1993 REGISTRATION RIGHTS
AGREEMENT among THE CERPLEX GROUP, INC. and the Investors, Stockholders, Banks
and Series B Preferred Holders listed therein.]
   20
                                        INVESTORS:

                                        SPROUT GROWTH II, L.P.

                                        By:  DLJ Capital Corporation, Managing
                                             General Partner


                                        By:  ___________________________________
                                             Robert Finzi, Attorney-in-Fact


                                        DLJ CAPITAL CORPORATION


                                        By:  ___________________________________
                                             Robert Finzi, Attorney-in-Fact


                                        CANAAN VENTURE LIMITED PARTNERSHIP

                                        By:  Canaan Management Limited
                                             Partnership, General Partner

                                        By:  Canaan Venture Partners L.P.,
                                             General Partner


                                        By:  ___________________________________
                                             General Partner


                                        CANAAN VENTURE OFFSHORE LIMITED
                                        PARTNERSHIP C.V.

                                        By:  Canaan Management Limited
                                             Partnership, General Partner

                                        By:  Canaan Venture Partners L.P.,
                                             General Partner


                                        By:  ___________________________________
                                             General Partner






[Signature Page to the FOURTH AMENDMENT TO THE 1993 REGISTRATION RIGHTS
AGREEMENT among THE CERPLEX GROUP, INC. and the Investors, Stockholders, Banks
and Series B Preferred Holders listed therein.]
   21
                                   BESSEMER VENTURE PARTNERS III L.P.

                                   By:   Deer III & Co., General Partner


                                   By:   ____________________________________
                                         Robert H. Buescher, General Partner


                                   By:   ____________________________________
                                         Robert H. Buescher, Attorney-in-Fact


                                   BANK HOLDERS:

                                   WELLS FARGO BANK, NATIONAL
                                   ASSOCIATION


                                   By:   ________________________________
                                         Name: __________________________
                                         Title: _________________________


                                   SUMITOMO BANK OF CALIFORNIA


                                   By:   ________________________________
                                         Name: __________________________
                                         Title: _________________________


                                   BHF - BANK AKTIENGESELLSCHAFT


                                   By:   ________________________________
                                         Name: __________________________
                                         Title: _________________________


                                   COMERICA BANK CALIFORNIA


                                   By:   ________________________________
                                         Name: __________________________
                                         Title: _________________________






[Signature Page to the FOURTH AMENDMENT TO THE 1993 REGISTRATION RIGHTS
AGREEMENT among THE CERPLEX GROUP, INC. and the Investors, Stockholders, Banks
and Series B Preferred Holders listed therein.]
   22
                                    WARRANT GROUP HOLDERS:

                                    THE NORTHWESTERN MUTUAL LIFE
                                    INSURANCE COMPANY


                                    By:  ________________________________
                                         Name: __________________________
                                         Title: _________________________


                                    JOHN HANCOCK MUTUAL LIFE INSURANCE
                                    COMPANY


                                    By:  ________________________________
                                         Name: __________________________
                                         Title: _________________________


                                    NORTH ATLANTIC SMALLER COMPANIES
                                    TRUST PLC


                                    By:  ________________________________
                                         Name: __________________________
                                         Title: _________________________






[Signature Page to the FOURTH AMENDMENT TO THE 1993 REGISTRATION RIGHTS
AGREEMENT among THE CERPLEX GROUP, INC. and the Investors, Stockholders, Banks
and Series B Preferred Holders listed therein.]
   23
                                                                  EXECUTION COPY

                                   Schedule A

                              SCHEDULE OF INVESTORS

Warrant Group Holders

The Northwestern Mutual Life Insurance Company
720 East Wisconsin Avenue
Milwaukee, WI  53202

John Hancock Mutual Life Insurance Company
John Hancock Place
200 Clarendon Street
Boston, Massachusetts  02117

North Atlantic Smaller Companies Trust PLC
c/o J.O. Hambro & Co., Ltd.
30 Queen Anne's Gate
London, England  SW1H9AL

Independent Equity Group

              Name

         Sprout Growth II, L.P.
         DLJ Capital Corp.
         Canaan Venture Limited Partnership
         Canaan Venture Offshore Limited
           Partnership
         Deepak Kamra
         Neill H. Brownstein
         Robert H. Buescher
         Michael I. Barach
         Christopher Gabrieli
         Brimstone Island Co., L.P.
         William T. Burgin
         G. Felda Hardymon
         Gabrieli Family Foundation
         John K. Rodakis
         Gautam A. Prakash
         David J. Cowan
         Rachel J. Erickson
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                                                                  EXECUTION COPY

         Bessemer Venture Partners III, L.P.
         C. Samantha Chen
         Rodney A. Cohen
         Richard R. Davis
         Adam P. Godfrey
         Barbara M. Henagan
         Robert D. Lindsay
         Bradford Mills
         Thomas F. Ruhm
         Ward W. Woods, Jr.
         Leo & Nicole Arnaboldi, JTWROS
         Perry H. Braun
         Norman H. Brown, Jr.
         John G. Danhalk
         Hoyt L. Davidson
         Thompson Dean
         Peter K. Deeks
         Ralph L. DeGroff, Jr.
         Anthony M. DeLuise
         David L. Dennis
         Thomas S. DePre
         Robert E. Diemar
         Robert Finzi
         Daniel K. Flatley
         Mark K. Gormley
         Joyce I. Greenberg
         Thomas G. Greig, III
         James D. Hann & Bonnie J. Hann, JTWROS
         Douglas M. Hayes
         Stephen J. Ketchum
         Richard E. Kroon
         Frederick C. Lane
         Mark Lanigan
         Steven E. Lebow
         Brian McLoughlin
         Kenneth David Moelis & Julie Lynn Moelis
           Trustees Under The Moelis Family Trust
         John Joseph Navin, III
         Michael R. Nicolais
         Peter J. Nolan
         Steven G. Puccinelli
         Larry E. Reeder
         Elan Adiel Schultz
         James T. Sington
         Jon R. Stone
   25
                                                                  EXECUTION COPY

         Steven F. Strandberg
         Kenneth A. Tucker
         R. Scott Turricchi
         Warren Woo
         Kirk B. Wortman
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                                                                  EXECUTION COPY

                                   Schedule B

                            SCHEDULE OF STOCKHOLDERS

         Catherine Bartholomew
         Frank Cameron
         Tom Cherry
         Roberta Claborn
         David O. Creasman
         Raymond Cruz
         Randle Dewees
         Edward Diaz
         Susan Eaton
         Harry Edmiston
         Dennis Fandrich
         Jon Gill
         Jacqueline Gillett
         Gary Graff
         Nelson Guillory
         Peggy Hams
         James Jones
         Roberta Kean
         Jennifer Klein
         Melissa Klein
         Pollianna Lewis
         Van Nguyen
         Richard Ollech
         Thomas D. Pipkin
         Juanita Pitts
         Keith Rathbone
         Richard Richardson
         Vincent Simpson
         Grover Smith
         Joyce Valdez
         Richard C. Davis
         Davis Children's Trust (Trustee:  Beth J. Pearce)
         Jerome Jacobson
         William A. Klein
         Myron Kunin
         Alan Weaver
         Theodore J. Wisniewski
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                                                                  EXECUTION COPY

                                   Schedule C

                             SCHEDULE OF BANKHOLDERS

         Wells Fargo Bank, N.A.
         Sumitomo Bank of California
         BHF - Bank Aktiengesellschaft
         Comerica Bank - California
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                                                                  EXECUTION COPY

                                   Schedule D

                     SCHEDULE OF SERIES B PREFERRED HOLDERS

         Sprout Growth II, L.P.
         DLJ Capital Corporation
         Scorpion Offshore Investment Fund
         The & Trust
         Chestnut Pacific Ltd. Partners
         Standard Global Equity Partners L.P.
         Standard Pacific Capital Offshore Fund Ltd.
         Common Fund Equity Fund
         Malcolm and Emily Fairbairn
         Andrea Martin
         Nitin T. Mehta
         Peak Investment Limited Partnership
         Pleiades Investment Partners
         Whitman Partners, L.P.
         Mahuma, N.V.


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                                                                 EXECUTION COPY