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                                                  DAVIS, MALM & D'AGOSTINE, P.C.
                                                                ONE BOSTON PLACE
                                                                BOSTON, MA 02108
                                                               TEL. 617-367-2500

                              August 31, 2005


Securities and Exchange Commission
Division of Corporation Finance
Washington, DC  20549

Attention: Edward M. Kelly, Senior Counsel

RE:  Clean Harbors, Inc. and Registrant Guarantors
     Registration Statement on Form S-4
     File No. 333-126193

     Clean Harbors, Inc.
     Annual Report on Form 10-K for the fiscal year ended December 31, 2004 and
     Subsequent Exchange Act Reports
     File No. 0-16379

Ladies and Gentlemen:

     On behalf of Clean Harbors, Inc. (the "Company") and its subsidiaries
listed as Registrant Guarantors (the "Guarantors") in the Registration Statement
on Form S-4 described above, there is herewith transmitted electronically for
filing Amendment No. 1 to the Registration Statement (the "Amendment") relating
to the proposed exchange offer of registered 11 1/4% Senior Secured Notes due
2012 (the "new notes") for the Company's similar unregistered notes (the "old
notes") now outstanding. To assist review of the Amendment by the Commission's
staff, we are delivering to Edward M. Kelly, Senior Counsel, three printed
copies of the Amendment with exhibits. Each of those copies is marked to show
changes from the Registration Statement as originally filed, except for the
exhibits and the unaudited financial statements for the six months ended June
30, 2005 which appear on pages F-87 through F-131 of the Amendment and replace
in their entirety the unaudited financial statements for the three months ended
March 31, 2005 which were included in the Registration Statement as originally
filed.

     The Company responds as described below to each of the comments on the
Registration Statement in the letter dated July 25, 2005 (the "Comment Letter")
from Pamela A. Long, Assistant Director. Each such comment and related response
has the same number as in the Comment Letter, but the page numbers in the
responses have been updated to the relevant page numbers in the revised
preliminary prospectus included in the Amendment.

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Securities and Exchange Commission
August 31, 2005
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1.   Please tell us your intentions for the preliminary proxy statement that was
     last revised on January 16, 2003. If you intend to withdraw the proxy
     statement, file separate correspondence on the EDGAR system to that effect.

RESPONSE: By letter dated August 25, 2005, filed with the Commission under
EDGAR, the Company has withdrawn the preliminary proxy statement last revised on
January 16, 2003. Such proxy statement is no longer relevant since the Company
redeemed on June 30, 2004 all of its previously outstanding Series C Convertible
Preferred Stock which was the subject of that proposed proxy statement.

2.   If applicable, comments on the S-4 are comments on the 10-K and subsequent
     Exchange Act reports and vice versa. As applicable, address comments below
     in future filings under the Exchange Act.

RESPONSE: As described below in this letter with respect to those comments which
relate to the Company's Annual Report on Form 10-K for the year ended December
31, 2004 and Quarterly Report on Form 10-Q for the quarter ended March 31, 2005,
the Company has modified the corresponding disclosures in the prospectus and in
the Quarterly Report on Form 10-Q for the quarter ended June 30, 2005 (which is
incorporated by reference into the prospectus). The Company will also address
such comments in the reports which the Company subsequently files under the
Exchange Act.

3.   We note that you are registering the new notes in reliance on our position
     enunciated in EXXON CAPITAL HOLDING CORPORATION (available April 13, 1989),
     MORGAN STANLEY & CO. INCORPORATED (available June 5, 1991), and SHEARMAN
     AND STERLING (available July 2, 1993). Provide a supplemental letter on the
     letterhead of Clean Harbors, Inc. or Clean Harbors signed by an officer
     before the S-4's effectiveness:

          -    stating that you are registering the exchange offer in reliance
               on our position in those letters, and

          -    including the statements and representations substantially in the
               form presented in the MORGAN STANLEY & CO. INCORPORATED and
               SHEARMAN AND STERLING letters.

RESPONSE: A supplemental letter from Carl Paschetag, Vice President and
Treasurer of the Company, containing the statements and representations
specified in this comment is being filed as correspondence with the Amendment.

4.   We note that you intend to file by amendment the legality opinion. Allow us
     sufficient time to review the opinion before requesting acceleration of the
     registration statement's effectiveness.

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Securities and Exchange Commission
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RESPONSE: The legality opinion of Davis, Malm & D'Agostine, P.C., is filed as
Exhibit 5.1 to the Amendment.

5.   On page 1 and throughout the document where you discuss EBITDA, discuss
     also your net income (loss) as calculated and presented according to GAAP.
     See Item 10(e)(1)(i)(A)) of Regulation S-K.

RESPONSE: Page 1 of the prospectus now deletes the EBITDA disclosure. The
disclosures of Adjusted EBITDA (see response to comments 17, 26 and 27 below)
which appear as part of the "Summary Historical Consolidated Financial Data"
(pages 10 and 12-14) and "Selected Historical Consolidated Financial Data"
(pages 27 and 29-31) also contain the Company's net income (loss) as determined
in accordance with GAAP for each of the periods for which Adjusted EBITDA is
presented and a reconciliation of each Adjusted EBITDA number to both net income
(loss) and cash flow from operations as determined in accordance with GAAP. In
other places in the prospectus where EBITDA is discussed, such discussion
generally focuses either on the Company's compliance with the covenants in its
current credit agreement and indenture which are based upon "Consolidated
EBITDA" (as such term is defined in the Company's current credit agreement and
indenture in the same manner as "Adjusted EBITDA" is defined in footnotes (8) on
pages 12 and 29 of the prospectus) or the relative performance of the segments
of the Company's business to overall performance.

6.   We note that you refer to third parties throughout the filing, including
     the financial statements' notes. For example, refer to "independent
     appraisal firm" on page 35, "Tillinghast Towers Perrin" on page 74, and
     "legal counsel" on pages 104 and 109. If you refer to third parties, you
     need to identify them and obtain their consent. Otherwise, you should
     delete all references to third parties. SEE Rule 436 of Regulation C under
     the Securities Act.

RESPONSE: Except for disclosures relating to specified matters for which
consents from the relevant third parties are filed as exhibits to the
Registration Statement, the prospectus deletes references to actuaries, legal
counsel and other experts.

7.   Explain the meaning of any abbreviation or acronym when introduced in the
     registration statement. For example, refer to "PRPs" in the first full
     paragraph on page 60.

RESPONSE: In connection with each initial use of an abbreviation or acronym (and
in connection with subsequent uses to the extent the Company believes such
restatement will be helpful to investors), the prospectus defines the relevant
abbreviation or term.

PROSPECTUS' OUTSIDE FRONT COVER PAGE

8.   Identify the guarantees as securities that you are offering with the notes
     by way of this prospectus.

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Securities and Exchange Commission
August 31, 2005
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RESPONSE: The first paragraph of the prospectus' cover page has been expanded to
add the specified disclosure.

9.   Refer to the fourth bullet point. Confirm for us that the offer will be
     open for a full 20 business days. At present, it appears that the offer
     could be open for less than the required 20 business days because the offer
     expires at 5:00 P.M. instead on midnight on what may ultimately be the
     twentieth business day after it begins. SEE Rule 14d-l(g)(3) under the
     Exchange Act and Q&A 8 in Release No. 34-16623, March 5,1980. We note the
     disclosure in the second bullet point on page 117.

RESPONSE: To ensure that the exchange offer will be open for a full 20 business
days, the disclosures throughout the prospectus and exhibits have been changed
to provide that the offer will expire on midnight rather than 5:00 p.m. on the
last such day.

10.  Delete the word "generally" in the fifth bullet point because the word
     "generally" may imply that investors cannot rely on the disclosure. Also
     delete the word "generally" under "Tax Consequences" on page 9 and under
     "Sale or Exchange of Notes" on page 176 and the language "for general
     information" in the bold type paragraph on page 178 for the same reason.

RESPONSE: The specified changes have been made on the cover page and pages 6,
179 and 182 of the prospectus.

11.  Remove any information not required by Item 501 of Regulation S-K and not
     key to an investment decision.

RESPONSE: The prospectus' cover page has been revised to delete information
which the Company believes is not required by Item 501 of Regulation S-K or key
to an investment decision.

12.  Except for footnotes, the typeface should be uniform throughout the
     document. Currently, the type on the prospectus' outside front cover page
     appears too small. Please revise.

RESPONSE: The typeface on the prospectus' outside cover page and throughout the
Amendment is at least ten points, except for footnotes which are at least eight
points.

13.  Move all information except that required by Item 2 of Form S-4 after
     "Table of Contents" on pages ii-iv so that it follows the summary and risk
     factors sections. SEE Item 502 and 503(c) of Regulation S-K.

RESPONSE: The section entitled "Available Information" has been renamed "Where
You Can Find Additional Information" and moved to page 184 of the prospectus.
The sections entitled

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Securities and Exchange Commission
August 31, 2005
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"Disclosure Regarding Forward-Looking Statements" and "Industry Market Data"
have been moved to pages 24 and 25 of the prospectus.

AVAILABLE INFORMATION, PAGE II

14.  It appears that you are providing disclosure under Item 10 of Form S-4. If
     so, please revise to include all documents required to be incorporated by
     Item 11 of Form S-4.

RESPONSE: The list of documents incorporated by reference on page 184 of the
prospectus has been expanded to include the Company's Annual Report on Form 10-K
for the year ended December 31, 2004, all other reports which the Company has
filed under the Exchange Act subsequent to December 31, 2004, and all reports
subsequently filed under the Exchange Act during the exchange offer.

INDUSTRY AND MARKET DATA, PAGE IV

15.  Amend this paragraph's language to remove the implication that you are
     disclaiming responsibility for information that you have chosen to include
     in the prospectus.

RESPONSE: The specified language now on page 25 of the prospectus has been
modified to state that the Company believes the industry and market data
included in the prospectus which the Company has obtained from third party
sources is accurate.

PROSPECTUS SUMMARY, PAGE 1

16.  The summary is much too detailed and includes information about Clean
     Harbors and its business that is repeated essentially word for word on
     pages 75-80. We note particularly the subsections on Clean Harbors'
     competitive strengths and business strategy. The emphasis on those features
     or aspects without a discussion of corresponding risks also leaves the
     summary somewhat unbalanced. Revise so that the summary highlights in a
     brief overview the key aspects or features of Clean Harbors and its
     business, eliminating the two subsections mentioned. SEE Item 503(a) of
     Regulation S-K.

RESPONSE: The summary has been shortened and the subsections entitled "Our
Competitive Strengths" and "Our Business Strategy" deleted.

17.  Ensure that the information that you retain is balanced. For example, you
     disclose revenue and EBITDA for the 12 month period ended March 31, 2005,
     but you do not disclose that earnings were insufficient to cover fixed
     charges during the years ended December 31, 2003 and 2002. Further,
     disclosure in footnote (8) on page 15 states that "Previous definitions of
     EBITDA were based on financial arrangements then in place and varied
     somewhat from the current definition of EBITDA."

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Securities and Exchange Commission
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RESPONSE: The disclosure formerly on page 1 as to EBITDA for the 12-month period
ended March 31, 2005 has been deleted. The disclosures of "Other Financial Data"
(which include both the ratio of earnings to fixed charges and Adjusted EBITDA)
on pages 10 and 27 and in footnotes (7) and (8) thereto on pages 12-14 and 29-31
point out that, during the years ended December 31, 2003 and 2002 and the six
months ended June 30, 2004, earnings were not sufficient to cover fixed charges.
The disclosures as to Adjusted EBITDA in those pages and footnotes now use a
consistent definition of Adjusted EBITDA for all periods presented, and include
reconciliations of the Adjusted EBITDA numbers to both net income (loss) and
cash flow from operations as determined in accordance with GAAP for each of the
relevant periods. Please also see the responses to comments 5, 26 and 27.

18.  Identify the notes' initial purchasers under "Background" on page 6.

RESPONSE: The section entitled "Background" on page 4 has been expanded to
provide the names of the initial purchasers of the old notes.

19.  Provide the book value of the collateral as of the date of the most recent
     balance sheet included in the prospectus. Also disclose the maximum amount
     of first-lien obligations that you are permitted to incur.

RESPONSE: The section entitled "Ranking" on pages 7-8 has been expanded to
disclose the maximum amount of first-lien obligations which the Company may have
outstanding. The section entitled "Security" on page 8 has been expanded to
disclose the book value of the assets which secure the notes on a second-lien
basis and which (along with certain other assets which do not secure the notes)
also secure the first-lien obligations.

20.  We assume that the reference to "this offering circular" under "Optional
     Redemption" on page 11 is inadvertent. Please revise.

RESPONSE: The reference under "Optional Redemption" on page 8 has been corrected
from "offering circular" to "prospectus."

21.  Revise "Change of Control" on page 11 to disclose that if there is a change
     of control, Clean Harbors may have insufficient financial resources or may
     be unable to arrange financing to repurchase the notes.

RESPONSE: The section entitled "Change of Control" on page 8 has been expanded
to state that the Company may then not be able to finance a repurchase of the
notes either through available cash or new financing and that the Company's
revolving credit and letter of credit facilities prohibit such a repurchase
without the consent of the lenders under such agreements.

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Securities and Exchange Commission
August 31, 2005
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RISK FACTORS, PAGE 18

22.  Many risk factors' captions or headings state merely a fact or describe an
     event that may occur in the future or are too vague to describe adequately
     the risk that follows. For example, refer to the first, second, fourth,
     fifth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth,
     fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth,
     twentieth, twenty-first, and twenty-second risk factors. State succinctly
     the risk that follows from the fact or uncertainty.

RESPONSE: Each of the risk factors has been revised to state more succinctly the
adverse consequences which may result to the Company and the holders of the
notes if the specified events or conditions should occur in the future.

23.  Avoid generic conclusions in the risk factors' captions or headings and in
     the risk factors' discussions such as Clean Harbors' results of operations,
     business, and financial condition would or could be materially and
     adversely affected or would or could be harmed. For example, refer to the
     third and nineteenth risk factors. Rather, explain specifically what the
     risk's consequences or effects are for Clean Harbors and its investors.

RESPONSE: Each of the risk factors has been revised to avoid generic conclusions
and explain more clearly the adverse consequences which may result to the
Company and holders of the notes if the specified events or conditions should
occur in the future.

24.  Some risk factors include language like "we cannot assure, "we can not
     assure," "we cannot guarantee," and "we cannot provide assurance." For
     example, refer to the second, third, fifth, sixth, ninth, tenth,
     fourteenth, and nineteenth risk factors. Since the risk is the situation
     described and not your inability to assure or guarantee, revise.

RESPONSE: Each of the risk factors has been revised to remove terms such as "we
can not assure" and explain more clearly the actual or potential event or
condition which gives rise to the risk.

25.  In the fifth factor, quantify your debt service obligations.

RESPONSE: The fifth risk factor on page 16 now states the aggregate amounts
which the Company incurred during 2004 and the six months ended June 30, 2005,
and anticipates incurring during the entire 2005 for interest on debt and fee
obligations on letters of credit.

SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA, PAGE 28

26.  Since you have adjusted EBITDA for charges other than interest, taxes,
     depreciation, and amortization expenses you should revise your title to
     reflect that fact. Refer to Question 14 in the June 13, 2003 FAQ on
     Non-GAAP Financial Measures.

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Securities and Exchange Commission
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RESPONSE: For each disclosure in the prospectus of an amount of EBITDA, the
title has been changed to "Adjusted EBITDA." Furthermore, as described above in
the response to comment 5, the principal of such disclosures contain both the
definition of "Adjusted EBITDA" and reconciliations of each such number to both
net income (loss) and cash flow from operations and determined in accordance
with GAAP for the relevant periods.

27.  Since the EBITDA amounts presented on page 16 for the years ended December
     31, 2002 and December 31, 2003 do not agree to amounts presented in Note 23
     to the financial statements, it appears that you are disclosing two
     different amounts of EBITDA. Explain why you have two different amounts and
     why you believe that both are useful to investors. Also revise the titles
     so that you are not using the same title for both amounts.

RESPONSE: As explained in Note (8) on pages 12 and 29, the amounts of Adjusted
EBITDA now shown for each of the specified periods in the "Summary Historical
Consolidated Financial Data" and "Summary Historical Consolidated Financial
Data" and the reconciliations of such amounts to both net income (loss) and cash
flow from operations on pages 13-14 and 30-31 have been calculated using a
consistent definition of "Adjusted EBITDA," which is the same as the definition
of "Consolidated EBITDA" in the Company's current credit agreement and indenture
each dated as of June 30, 2004. The Company believes that this presentation is
helpful to investors because it reflects changes in the Company's performance
throughout all of the specified periods using a consistent definition of
"Adjusted EBITDA." The Company has also revised the presentation of EBITDA in
Note 23 of the financial statements for the three years ended December 31, 2004
on page F-74 to be consistent with Adjusted EBITDA presented for the years ended
December 31, 2002 and 2003 on pages 12 and 29. Note 23 to the Company's
previously reported financial statements for the years ended December 31, 2003
and 2002, presented EBITDA numbers based on the definitions of "Consolidated
EBITDA" in the Company's credit agreements as then in effect, which differed
slightly from the definition of "Consolidated EBITDA" in the Company's current
credit agreement and indenture. However, the adjustments which have been made
for this purpose in revised Note 23 to the previously reported EBITDA numbers
represent only less than one-half of one percent for the year ended December 31,
2003, and less than one-tenth of one percent for the year ended December 31,
2002.

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS CRITICAL ACCOUNTING POLICIES AND ESTIMATES, PAGE 36

28.  Expand your discussion of critical accounting policies to address these
     items:

     -    Indicate whether you have discussed your critical accounting estimates
          with your audit committee.

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Securities and Exchange Commission
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RESPONSE: Page 35 of the prospectus now states that management discusses each of
the critical accounting estimates with the Audit Committee of the Company's
Board of Directors prior to each release of the Company's annual financial
statements.

     -    Provide a quantitative discussion of changes in your overall financial
          performance if you were to assume that the accounting estimates were
          changed by using reasonably possible near term changes in the most
          material assumptions underlying the accounting estimates or by using
          the reasonably possible range of the accounting estimates. For
          example, we would expect to see a detailed discussion of the
          significant assumptions used in arriving at your closure and
          post-closure obligations. This discussion should include the inflation
          and discount rates used and the impact on your financial results if
          you assumed changes in these assumptions.

RESPONSE: The disclosure as to the accounting estimates respecting
"Environmental Liabilities" on page 37 has been expanded as follows:

     "As of June 30, 2005, we had recorded discounted remedial liabilities of
     $148.7 million. We also estimate that it is "reasonably possible" as that
     term is defined in SFAS No. 5 ("more than remote but less than likely"),
     that the amount of such remedial liabilities could be up to $22.0 million
     greater than such $148.7 million."

     The disclosure as to the accounting estimates respecting "Legal Matters" on
page 38 has been expanded as follows:

     "We also estimate that it is "reasonably possible" as that term is defined
     in SFAS No.5 (more than remote but less than likely), that the amount of
     such total liabilities could be up to $3.0 million greater than such $ 34.1
     million. Because all of our reasonably possible additional losses relating
     to legal liabilities relate to remedial liabilities, the reasonably
     possible additional losses for legal proceedings liabilities are reflected
     in the tables of reasonably possible additional losses under the heading
     "Environmental Liabilities" below."

     With respect to the accounting estimates respecting "Accounting for
Landfills" referenced on pages 36-37 and further described on pages 52-59, the
Company believes that its most significant risk, the risk of a significant
reduction in highly probable airspace, is adequately disclosed and that it is
not practicable to provide an estimate or range of estimate for the loss that
could be incurred. Furthermore, the Company believes that it is not helpful to
investors to quantify the estimated effects of changes in inflation or discount
rates, since any near-term change in inflation or discount rates used would only
affect asset retirement obligations incurred in the current year and would not
be material to the financial statements. Inflation rates used for

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Securities and Exchange Commission
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landfill volume consumed during the years ended December 31, 2004, and December
31, 2003, and the six months ended June 30, 2005, were 1.15%, 2.00%, and 2.16%,
respectively. Discount rates for the same periods were 12.50%, 14.00%, and
10.25%.

     -    Provide a quantitative and qualitative discussion of any material
          changes made to the accounting estimates in the effect on your overall
          financial performance.

     SEE Release Nos. 33-8040, 33-8098, and 33-8350.

RESPONSE: The principal changes in accounting estimates which have affected the
Company's financial statements over the periods covered by the Management's
Discussion and Analysis relate to changes in estimates relating to
"Environmental Liabilities" and "Insurance Expense." The disclosure as to
changes in estimates relating to "Environmental Liabilities" on pages 37-38 has
been expanded as follows:

     "Net reductions in our estimates of environmental liabilities resulted in
     increases to our reported results of operations of $3.3 million, $ 0.3
     million and $7.6 million for the years ended December 31, 2004 and 2003,
     and the six months ended June 30, 2005, respectively."

     The disclosure as to change in accounting estimates relating to "Insurance
Expense" on page 38 has been expanded as follows:

     "The effect of the restatement was to increase cost of revenues by $0.3
     million for the years ended December 31, 2003 and 2002."

RESULTS OF OPERATIONS, PAGE 39

29.  Enhance your MD&A disclosures by including these items:

     -    Quantify the impact of each factor when multiple factors contribute to
          material fluctuations in a line item. For material fluctuations in net
          sales, discuss the extent to which the fluctuation is due to pricing,
          volumes sold, or the introduction of new products.

     -    Discuss the nature of the items included in corporate revenues and
          cost of revenues. Also discuss and quantify the reasons for the
          fluctuations in corporate items.

     SEE Item 303(a) of Regulation S-K.

RESPONSE: The discussions of "Results of Operations" on page 39-51 now disclose
the quantitative impact of each factor where multiple factors were involved. For
material

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Securities and Exchange Commission
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fluctuations in net sales, the reasons for the fluctuations are described. The
descriptions of the nature of items included in corporate revenues, cost of
revenues and selling, general and administrative items have also been expanded.

ENVIRONMENTAL LIABILITIES, PAGE 50

30.  You state that landfill assets are amortized and closure and post-closure
     costs are accrued as airspace is consumed. Disclose the rates that you used
     for the amortization of landfill and post-closure costs during each period
     presented. If applicable, discuss the reasons for material fluctuations.

RESPONSE: The following statement has been added to the description of
"Environmental Liabilities" on page 56 and, with minor revisions, to Note 4,
"Significant Accounting Policies" on page F-23:

     "In 2003 and 2004 we reduced closure and post-closure liabilities as a
     result of increasing highly probable landfill airspace. After acquiring
     landfills as part of the CSD assets from Safety-Kleen in 2002, our
     management identified new business opportunities that made possible the
     expansion, and further utilization, of the assets that the previous owners
     had believed to be exhausted. The resulting increase in airspace was
     accounted for by reducing landfill retirement liabilities (due to delaying
     the closure and post-closure expenditures) and by correspondingly reducing
     landfill assets by $11.6 million and $1.2 million for the years ended
     December 31, 2003 and 2004 respectively. See the tables of changes to
     closure and post-closure liabilities below."

     "We calculate the rates we use to amortize landfill assets based upon the
     dollar value of estimated final liabilities, the surveyed remaining
     airspace of the landfill, and the time estimated to consume the remaining
     airspace. Consequently, rates vary for each landfill and for each asset
     category, and we recalculate them each year. During the years ended
     December 31, 2004, and 2003, we depreciated landfill assets at average
     rates of $0.39 and $2.62 per cubic yard, respectively. The change in the
     amortization rate of landfill assets resulted primarily from the $11.6
     million reduction in landfill retirement liability described immediately
     above."

     A similar statement has been added on page 58 and, with minor revisions, to
Note 12, "Closure and Post-Closure Liabilities" on page F-49 and, in addition,
the following statement has been added on page 58 with respect to inflation:

     "We calculate the rates we use to accrue closure and post-closure costs as
     a function of the dollar value of estimated final liabilities, the surveyed

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     remaining airspace of the landfill, and the time estimated to consume the
     remaining airspace. Consequently, rates vary for each landfill and for each
     asset category, and we recalculate them each year. During the years ended
     December 31, 2004, and 2003, we accrued asset retirement obligations at
     average rates of $1.23 and $1.46 per cubic yard, respectively. The changes
     in the accrual rate of asset retirement obligations resulted primarily
     from the $11.6 million reduction in landfill retirement liability
     described immediately above."

31.  Provide a rollforward of landfill assets for each period presented.

RESPONSE: Pages 55-56 and F-23 now provide a rollforward of landfill assets for
the years ended December 31, 2004 and 2003.

32.  Since the 7.8 million cubic yards of unpermitted airspace included in
     probable airspace did not meet your established criteria for determining if
     unpermitted airspace should be included in probable airspace, disclose the
     impact of including this airspace on your income from operations for each
     period presented. Also disclose the reasons for not having submitted the
     permit application and when you intend to submit the permit application.

RESPONSE: The following statement has been added to "Environmental Liabilities"
on page 54 and (with minor modifications) to Note 4, "Significant Accounting
Policies" on page F-22:

     "Had we not included the 7.8 million cubic yards of unpermitted airspace in
     highly probable airspace, operating expense for year ended December 31,
     2004, and for the six months ended June 30, 2005 would have been higher by
     $439 thousand and $271 thousand, respectively."

33.  Since the changes in estimates resulted in a reduction of closure and
     post-closure liabilities of approximately 12% during the year ended
     December 31, 2004 and 19% during the year ended December 31, 2003, disclose
     the facts and circumstances that led to these changes in your estimates.
     Also disclose how the "other changes in estimates" are reflected in your
     financial statements.

RESPONSE: The following statement has been added to "Environmental Liabilities"
on page 56 and (with minor modifications) to page 58 and Note 4, "Significant
Accounting Policies" on page F-23, and Note 12, "Closure and Post-Closure
Liabilities" on page F-49:

     "In 2003 and 2004 we reduced closure and post-closure liabilities as a
     result of increasing highly probable landfill airspace. After acquiring
     landfills as part of the CSD assets from Safety-Kleen in 2002, our
     management identified new business opportunities that made possible the

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     expansion, and further utilization, of the assets that the previous owners
     had believed to be exhausted. The resulting increase in airspace was
     accounted for by reducing landfill retirement liabilities (due to delaying
     the closure and post-closure expenditures) and by correspondingly reducing
     landfill assets by $11.6 million and $1.2 million for the years ended
     December 31, 2003 and 2004 respectively. See the tables of changes to
     closure and post-closure liabilities below."

CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING, PAGE 73

34.  You state that "except as otherwise discussed elsewhere in this prospectus,
     there have not been any changes in the Company's internal control over
     financial reporting." Remove this wording, and disclose in this section all
     changes in your internal control over financial reporting that occurred
     during your last fiscal quarter that has materially affected or is
     reasonably likely to materially affect your internal control over financial
     reporting. SEE Item 308(c) of Regulation S-K.

RESPONSE: On page 75, the words "elsewhere in this prospectus" have been revised
to read "below under 'Remediation of Material Control Weakness,'". As described
under that caption, the Company changed during the first quarter of 2005 its
internal control over accounting for self-insured workers' compensation and
motor vehicle liability reserves in order to use an actuarial-based method. That
change is the only change since December 31, 2004 in internal control over
financial reporting which materially affected, or is reasonably likely to
materially affect, the Company's internal control over financial reporting.

BUSINESS, PAGE 76

35.  State the duration of Clean Harbors' three patents under "Intellectual
     Property" on page 90. SEE Item 101(c)(l)(iv) of Regulation S-K.

RESPONSE: Page 92 of the prospectus has been revised to state the expiration
dates of those patents.

36.  State in the first full paragraph on page 106 the amount of reserves that
     Clean Harbors has established to cover its estimated legal costs for the
     lawsuit against Clean Harbors Plaquemine, LLC. Specify the known or
     estimated amount of civil penalties that the plaintiffs are seeking in the
     lawsuit.

RESPONSE: The description on pages 108-109 of the three lawsuits which have
now been brought against various Clean Harbors companies involving the
Plaquemine facility has been revised to provide the additional information.

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37.  If true, indicate in the second full paragraph on page 109 that the Norfolk
     Superior Court and the Suffolk Superior Court are located in the state of
     Massachusetts.

RESPONSE: The description on page 112 of the litigation involving the former
holders of the Company's subordinated notes has been revised to state that
Norfolk and Suffolk Counties are in Massachusetts and to update that disclosure
to describe a recent development in that litigation.

THE EXCHANGE OFFER, PAGE 116

38.  Revise the language "as soon as practicable" so that it reads "promptly" in
     the first and eighth paragraphs under "Terms of the Exchange" on pages
     118-119. Similarly, revise the third paragraph under "Expiration Date;
     Extensions; Amendments" on page 120, the ninth paragraph under "Procedures
     for Tendering" on page 122, the third paragraph under "Withdrawal of
     Tenders" on page 125, and the second paragraph on page 10 of exhibit 99.1.
     SEE Rule 14e-1(c) under the Exchange Act.

RESPONSE: The specified changes have been made on pages 122,123,126 and 128 of
the prospectus and page 1 of revised exhibit 99.1.

EXPIRATION DATE; EXTENSIONS; AMENDMENTS, PAGE 120

39.  You state in the first bullet point that you reserve the right to delay
     accepting any old notes. Clarify in what circumstances you will delay
     acceptance. For example, if you are referring to the right to delay
     acceptance only due to an extension of the exchange offer, so state.
     Confirm for us that any delay will be consistent with Rule 14e-1(c) under
     the Exchange Act.

RESPONSE: The first bullet point on page 123 has been revised to clarify that
the Company's right to delay accepting any old notes would be due only to an
extension by the Company of the term of the exchange offer. The Company hereby
confirms that, if the Company should elect to extend the exchange offer, it
would comply with Rule 14e-1(c) under the Exchange Act

40.  You state in the second bullet point and in first full paragraph on page 2
     of exhibit 99.1 that you reserve the right to extend the exchange offer.
     Advise us how oral notice of any extension is reasonably calculated to
     reach registered holders of the outstanding notes or otherwise satisfies
     the requirements of Rule 14e-1(d) under the Exchange Act.

RESPONSE: If the Company were to extend the exchange offer, it would give notice
of such extension in accordance with Rule 14e-1(d) under the Exchange Act. Page
123 of the prospectus has been revised to provide that any such notification
would include a release to a financial news service not later than 9:00 a.m.,
Eastern time on the business day after the previously scheduled effective date.
Depending upon the circumstances, the Company might also use additional methods
of notification.

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41.  Clarify that you will make a public announcement of any extension of the
     exchange offer no later than 9:00 A.M. Eastern time on the next business
     day after the scheduled expiration date as required by Rule 14e-d(1) under
     the Exchange Act. Confirm that you will disclose the approximate number of
     notes tendered to date with your public announcement of an extension as
     required by Rule 14e-1(d) under the Exchange Act.

RESPONSE: As described in the response to comment 40, page 123 of the prospectus
has been revised to provide that any public announcement of an extension of the
exchange offer would be given by making a release to a financial news service
not later than 9:00 a.m., Eastern time on the business day after the previously
scheduled extension date. The Company hereby confirms that, in accordance with
Rule 14e-1(d) under the Exchange Act, any such notice would also disclose the
approximate number of notes tendered to date.

42.  You state in the third bullet point that you reserve the right to terminate
     the exchange offer if in your "sole judgment" a condition is not satisfied.
     We do not object to the imposition of conditions in a tender offer,
     provided that they are not within the direct or indirect control of the
     offeror and are specific and capable of objective verification when
     satisfied. Thus, we suggest that you revise the bullet point to clarify
     that Clean Harbors will make its determination in its "reasonable
     discretion" or "reasonable judgment." Similarly, revise the last bullet
     point under "Conditions to the Exchange Offer" on page 120 and the second
     paragraph on page 121.

RESPONSE: The fourth bullet point under "Expiration Date; Extensions;
Amendments" on page 123 and the second and third full paragraphs on page 124
have been revised to clarify that the Company's right to determine whether each
condition to the exchange offer has been satisfied is in the reasonable
discretion or reasonable judgment of the Company.

43.  We note the disclosure in the fourth bullet point that you reserve the
     right to amend the exchange offer's terms. Revise to indicate that if there
     is a material change in the offer, including the waiver of a material
     condition, you will extend the offering period if necessary so that at
     least five business days remain in the offer following notice of the
     material change.

RESPONSE: The fifth bullet point under "Expiration Date; Extensions; Amendments"
on page 123 has been revised to state that, if the Company makes a material
change in the exchange offer (including a waiver of a material condition), the
Company will extend the offering period if necessary so that at least five
business days remain in the offering period following notice of the material
change.

CONDITIONS TO THE EXCHANGE OFFER, PAGE 120

44.  We note the disclosure in the first bullet point that Clean Harbors has
     reserved the right not to accept notes for exchange if it determines that
     the offer would violate applicable

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Securities and Exchange Commission
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     law or our interpretations. Revise to indicate that all conditions to the
     offer other than those subject to governmental approval must be satisfied
     or waived before the exchange offer's expiration, not merely before
     acceptance of the outstanding notes for exchange.

RESPONSE: The first paragraph under "Conditions to the Exchange Offer" on pages
123-124 has been revised by changing the words "before the acceptance of the
old notes" to read "before the exchange offer's expiration or receipt of any
required governmental approval."

45.  You state in the first paragraph on page 121 that you may assert or waive
     the conditions "at any time" and "at any time and from time to time." We
     believe that this statement may suggest conditions to the exchange offer
     may be waived or asserted after the exchange offer's expiration. Revise the
     disclosure to make clear that all conditions to the exchange offer other
     than those dependent upon receipt of necessary governmental approvals must
     be satisfied or waived before the exchange offer's expiration. Similarly,
     revise the fifth full paragraph on page 122 and the first full paragraph on
     page 2 of exhibit 99.1.

RESPONSE: In response to this comment and comment 46 below, the following
sentence has been added to the first full paragraph on page 124, the carryover
paragraph on pages 125-126, and (with appropriate modifications to certain
capitalized terms) to the first full paragraph on page 2 of exhibit 99.1:
"However, in no event shall the exchange offer be consummated unless all
conditions, other than those dependant upon receipt of any required governmental
approval, have been satisfied or waived prior to the expiration of the exchange
offer or any extension thereof and, if we elect a waive any condition, we must
announce that decision in a manner reasonably calculated to inform the
noteholders of the waiver."

46.  You state in the first paragraph on page 121 that "A failure on our part to
     exercise any of the above rights shall not constitute a waiver of that
     right." You may not waive implicitly an offer condition by failing to
     assert it. If you decide to waive a condition, you must announce expressly
     the decision in a manner reasonably calculated to inform noteholders of the
     waiver. Please revise.

RESPONSE: Please see the response to comment 45 above.

DESCRIPTION OF THE NEW NOTES, PAGE 126

47.  Revise language in this section's third paragraph's second sentence on page
     127 that can be read to imply that investors do not have rights under the
     United States federal securities laws about the notes' description in the
     prospectus.

RESPONSE: The third sentence in the third paragraph on page 130 has been
expanded to clarify that noteholders would have rights arising under United
States securities laws to the

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extent that the following description of the terms of the indenture and the
notes were inaccurate in any material respect.

NO PERSONAL LIABILITY OF DIRECTORS, EMPLOYEES, MEMBERS AND STOCKHOLDERS,
PAGE 149

48.  Revise to clarify that any agreement to waive the requirements of the
     United States federal securities laws is void under section 14 of the
     Securities Act.

RESPONSE: This section on page 152 has been expanded to state that the specified
waiver and release would not apply to any liabilities arising under the United
States federal securities laws since any agreement to waive the requirements of
such laws would be void under Section 14 of the Securities Act of 1933, as
amended.

CERTAIN DEFINITIONS

49.  This subsection defines some terms whose meanings are readily understood or
     are apparent from the context. Review this subsection and eliminate
     unnecessarily defined terms. Examples include terms like "Bankruptcy Law,"
     " Board of Directors," "Commission," "Exchange Act," "GAAP," and "Person."

RESPONSE: In response to this comment, the "Certain Definitions" section has
been shortened by deleting some terms whose meanings are likely to be readily
understood by the note holders. However, the Company believes that some terms
should be retained where the definition is helpful to such holders. In
particular, while investors would readily understand that "GAAP" refers to
generally accepted accounting principles, the defined term refers to those
principles as in effect on June 30, 2004 (the date of the indenture and on which
the notes were originally issued), and compliance with the covenants in the
indenture will therefore be determined in accordance with those principles as
opposed to such changed principles as may evolve over the period while the notes
are outstanding. Similarly, the term "Person" has a meaning quite different than
that used in normal speech, since that term refers not only to natural persons
but also to entities of all types.

CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS, PAGE 175

50.  Revise to refer to "material" rather than "certain" or "certain material"
     United States federal income tax consequences in this section's caption or
     heading and this section's first sentence.

RESPONSE: The word "certain" has been deleted throughout on page 178, and the
references are now to "material" tax consequences.

51.  Under "The Exchange Offer" on page 179, explain why you are unable to
     provide "will not" and "will have" conclusions rather than "should not" and
     "should have" conclusions

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     on the United States federal income tax consequences of the exchange offer.
     Disclose any resulting risks to noteholders.

RESPONSE: Under "The Exchange Offer" on page 180, the word "should" has been
changed to "will".

52.  Delete the statement that the discussion is for general information only.
     This language may suggest that you do not have full responsibility under
     the federal securities laws for this discussion.

RESPONSE: Page 182 deletes the statement that the discussion is for general
information only.

LEGAL MATTERS, PAGE 179

53.  Clarify that counsel will opine on enforceability of the obligations of
     Clean Harbors guarantors under the notes.

RESPONSE: The "Legal Matters" section on page 183 of the prospectus has been
expanded to clarify that the opinion of Davis, Malm & D'Agostine, P.C. (Exhibit
5.1 to the Registration Statement) relates to both the validity and
enforceability of the new notes and the guarantees thereof by the Guarantors.

CONSOLIDATED BALANCE SHEETS, PAGE F-4

54.  Disclose separately balances billed to customers under retainage
     provisions. Also state the amounts that are expected to be collected after
     one year, and, if practical, when the amounts of retainage are expected to
     be collected by year. SEE Rule 5-02(3)(c) of Regulation S-X.

RESPONSE: The Company believes the balances billed to customers under retainage
provisions (less than $1.0 million for each balance sheet presented) are
immaterial to the financial statements. The Company expects to collect all
retainage balances currently outstanding within one year, and will continue to
monitor retainage and make any appropriate additional disclosures if or when
required.

CONSOLIDATED STATEMENTS OF OPERATIONS, PAGE F-6

55.  Revise your description of the cost of revenues line item to clarify, if
     appropriate, that it is exclusive of depreciation expense. SEE SAB Topic
     11:B.

RESPONSE: The description of the cost of revenues line item on page F-6 has been
revised in accordance with SAB Topic 11:B.

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NOTE 4. SIGNIFICANT ACCOUNTING POLICIES, PAGE F-14

56.  You state on page 45 that depreciation and amortization expense of $24.1
     million for 2004 decreased from $26.5 million for 2003 due to changes in
     estimates in landfill lives and changes in useful lives of certain assets.
     Provide the disclosures required by paragraph 33 of APB 30.

RESPONSE: Under "Depreciation and Amortization" on page 46 of "Management's
Discussion and Analysis of Financial Condition and Results of Operations" and
on pages F-16 and F-17 of Note 4, "Significant Accounting Principles," the
following disclosure has been added:

     "Depreciation and amortization expense of $24.1 million for 2004 decreased
     from $26.5 million for 2003 due to changes in estimates in landfill lives
     and changes in estimates in useful lives of certain assets of $3.5 million,
     which was offset by an increase in depreciation and amortization due to
     capital additions. The impact of the changes in estimate on dilutive loss
     per share for the year ended December 31, 2004 was a decrease in the loss
     of $0.25 per common share."

57.  You state on page 1 in the description of your services that your technical
     services involve the transport, treatment, and disposal of hazardous waste.
     Disclose how you recognize revenue related to each of these services and
     how your revenue recognition policy conforms to SAB Topic 13:A.

RESPONSE: Please see the response to comment 60 below about certain additional
disclosures that have been made.

     The Company records revenue for transportation services provided to
customers upon the completion of delivery of those services. Revenues related to
the treatment and disposal of hazardous waste is deferred until the waste is (i)
incinerated at one of the Company's facilities, (ii) placed into a cell at one
of the Company's hazardous waste landfill facilities, (iii) discharged into a
sewer system after treatment at one of the Company's wastewater facilities, or
(iv) injected into the Company's deep injection well.

     SAB Topic 13:A lists four criteria that must be met for revenue to be
recognized: (1) persuasive evidence of an arrangement exists, (2) services have
been rendered, (3) the seller's price to the buyer is fixed or determinable, and
(5) collectibility is reasonably assured. The Company meets these criteria for
the recognition of its revenues. Almost every invoice rendered to a customer for
the Company's services requires the Company's employees to go to customer
locations for the performance of some or all of the services rendered. The fact
that the Company's employees are admitted to customer sites to perform services
indicates that a persuasive arrangement exists with the customer. At a customer
location, the Company's employees perform a variety of services which almost
always require that a representative of the customer sign manifests, worksheets,
change orders and/or other documents which further evidences that a persuasive
arrangement exists. The Company recognizes revenues only as services are
rendered and not prior to performance. The pricing to the customer is fixed and

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determinable based on quotes, contracts, rate sheets provided to the customer or
based upon a historical relationship with the customer. As a matter of practice,
the Company does not perform services unless the Company believes that it will
be paid. The Company provides allowances for bad debts and/or sales allowances
in those circumstances where collection is in doubt.

58.  Tell us more about your sales contracts with your customers, including
     whether they are generally for multiple services. Tell us what
     considerations you have given to EITF 00-21 in recognizing revenue.

RESPONSE: The Company often provides multiple services to a single customer
because the Company is a vertically integrated service provider. The Company
provides a wide range of environmental services through two major segments:
Technical Services and Site Services. Technical Services involve (i) services
for collection, transportation and logistics management, (ii) services for the
categorizing, packaging and removal of laboratory chemicals (Cleanpack(R)), and
(iii) services related to the treatment and disposal of hazardous wastes. Site
Services involve a wide range of services to maintain industrial facilities and
process equipment, as well as clean up or contain actual or threatened releases
of hazardous materials into the environment. Revenues for all services with the
exception of services for the treatment and disposal of hazardous waste are
recorded as services are rendered. Revenues for disposing of hazardous waste are
recognized upon completion of wastewater treatment, landfill or incineration of
the waste at a Company-owned site or when the waste is shipped to a third party
for processing and disposal. The Company competes against many competitors that
provide one or more of the services that the Company provides. Each one of the
services that the Company offers can be provided on a stand-alone basis or
bundled with other services. Because each service the Company offers is provided
on a stand-alone basis, the Company is able to reference market (fair value)
rates when developing quotes to its customers. Under the Company's service
arrangements, performance of the Company's undelivered services are probable and
are substantially under the control of the Company.

59.  You state that you recognize revenue when waste is shipped to a third party
     for processing and disposal. Tell us how this policy complies with SAB
     Topic 13:A. Demonstrate specifically how you have substantially
     accomplished the services that you are obligated to perform under the terms
     of your customer arrangements.

RESPONSE: The Company's standard Environmental Services and Waste Disposal
Agreement with the Company's customers includes the following:

     "Title, risk of loss and all other incidents of ownership to the waste
     materials shall be transferred from Customer to Clean Harbors at the time
     Clean Harbors takes possession of and removes waste materials from the
     place of transfer, or at the time Clean Harbors accepts delivery of the
     waste materials at its TSD facility, whichever is applicable."

The Company's standard Waste Disposal Agreement that the Company enters into
with companies to which the Company sends waste includes the following:

     "Title, risk of loss and all other incidents of ownership to the waste
     materials shall be transferred from Clean Harbors to Contractor at the
     time Contractor takes possession of and removes waste materials from the
     place of transfer, or at the time Contractor accepts delivery of the
     waste materials at its TSD facility, whichever is applicable."



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     The Company believes that when the Company receives waste from its
customers that it accepts title to that waste and assumes the liability for
disposing of the waste. The Company also believes that its customers perceive
the transaction the same way because its customers are almost always willing to
pay the Company's invoices for waste disposal upon receipt of the invoice rather
than upon treatment or disposal of the waste. The Company believes that when it
contracts with a vendor to dispose of the waste the vendor likewise accepts
title to the waste and the liability transfers to the vendor. Because the
Company believes that it no longer has title to the waste nor a direct liability
associated with the waste, the Company believes that its earnings process is
complete and that it is appropriate to recognize the revenue at the time of
title transfer. Although there is some difference between the transfer of title
to an asset and the acceptance of a liability, the Company believes that the
basic concepts of SAB 13:A can be applied to the transfer of a liability to a
vendor. In all cases, the Company believes that a persuasive evidence of an
arrangement exists, delivery has occurred, the price is fixed or determinable,
and payment is reasonably assured.

     The relationship between the Company and its waste disposal vendors is not
that of general contractor and sub-contractor. In a relationship between a
contractor and sub-contractor, the contractor manages the sub-contractor in
order to perform the project to the customer's requirements. The relationship
between the Company and its disposal vendors is the same as that as between a
company and its supplier where revenue is recognized as title to goods delivered
is transferred.

60.  You state that revenues from waste that is not yet completely processed and
     the related costs are deferred until the services are completed. You state
     also that revenues from cost plus, fixed fee, and fixed unit price
     contracts relating to site services, CleanPack services, and transportation
     services costs are recorded as costs are incurred or units are completed
     and include estimated fees earned according to terms of the contracts.
     Disclose the accounting literature that you are using in accounting for
     these types of revenues. Also tell us how you determined that it was
     appropriate for you to use this literature.

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RESPONSE: The Company has revised the description of its revenue recognition
policy in order to make the policy more understandable to the reader and added
the revised disclosure to Note 4(b) on page F-15 and Note 3(a) on page F-93, as
follows:

     "The Company recognizes revenue when persuasive evidence of an arrangement
     exists, delivery has occurred or services have been rendered, the price is
     fixed or determinable, and collection is reasonably assured."

     "The Company provides a wide range of environmental services through two
     major segments: Technical Services and Site Services. Technical Services
     involve (i) services for collection, transportation and logistics
     management, (ii) services for the categorizing, packaging and removal of
     laboratory chemicals (Cleanpack(R)), and (iii) services related to the
     treatment and disposal of hazardous wastes. Site Services involve a wide
     range of services to maintain industrial facilities and process equipment,
     as well as clean up or contain actual or threatened releases of hazardous
     materials into the environment. Revenues for all services with the
     exception of services for the treatment and disposal of hazardous waste are
     recorded as services are rendered. Revenues for disposing of hazardous
     waste are recognized upon completion of wastewater treatment, landfill or
     incineration of the waste at a Company-owned site or when the waste is
     shipped to a third party for processing and disposal. Revenues from waste
     that is not yet completely processed and the related costs are deferred
     until services are completed. Revenue is recognized on contracts with
     retainage when services have been rendered and collectibility is reasonably
     assured."

     The Company recognizes revenue in accordance with EITF No. 00-21, Revenue
Arrangements with Multiple Deliverables and SEC Staff Accounting Bulletin
No. 101, Revenue Recognition in Financial Statements.

(j) PROPERTY, PLANT, AND EQUIPMENT, PAGE F-16

61.  Break out the vehicles and equipment line item into smaller and more
     meaningful components. Disclose separately the range of useful lives for
     each new category presented. For categories that still have very broad
     useful lives, you should discuss separately the types of assets that fall
     in each part of the range.

RESPONSE: Page F-17 of the prospectus now breaks out the vehicles and equipment
line into two lines and includes the range of useful lives for those two
categories. Page F-17 also now includes a category for land improvements and the
useful life for such category.

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(m) CLOSURE AND POST-CLOSURE LIABILITIES, PAGE F-17

62.  You state that the reductions in some asset retirement obligations were
     partly offset by closure and post-closure obligations recorded for
     operating non-landfill facilities. Provide a general description of these
     new obligations for non-landfill facilities, including when these
     obligations arose, how you previously accounted for them, and how you
     arrive at the estimated amounts to record.

RESPONSE: Note 4(n) on page F-24 and Note 3(c) on page F-94 now state as
follows:

     "The Company records its non-landfill closure and post-closure liability by
     (i) estimating the current cost of closing a non-landfill facility and the
     post closure care of that facility, if required, based upon the closure
     plan that the Company is required to follow under its operating permit, or
     in the event the facility operates with a permit that does not contain a
     closure plan, based upon legally enforceable closure commitments made by
     the Company to various governmental agencies, (ii) using probability
     scenarios as to when in the future operations may cease, (iii) inflating
     the current cost of closing the non-landfill facility on a probability
     weighted basis using the inflation rate to the time of closing under each
     probability scenario, and (iv) discounting the future value of each closing
     scenario back to the present using the credit-adjusted risk-free interest
     rate. Non-landfill closure and post-closure obligations arise when the
     Company commences operations. Prior to the implementation of SFAS No. 143,
     these obligations were expensed in the period that a decision was made to
     close a facility."

63.  Disclose how you were previously accounting for financial assurance costs.
     Refer to the accounting literature that you used. Clarify how SFAS 143
     impacted your accounting of these costs.

RESPONSE: Note 4(n) on page F-19 and, with modifications, Note 3(c) on page F-94
now state as follows:

     "Prior to the adoption of SFAS No. 143, the Company accrued the cost of
     financial assurance relating to both landfill and non-landfill closure and
     to both landfill and non-landfill post-closure care, as required, under
     SFAS No. 5, "Accounting for Contingencies." Under SFAS No. 143, financial
     assurance is no longer included as a component of closure or post-closure
     costs. SFAS No. 143 requires the cost of financial assurance to be expensed
     as incurred, and SFAS No. 143 requires the cost of financial assurance to
     be considered in the determination of the credit-adjusted risk-free
     interest rate."

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64.  Disclose what benchmark(s) you use to arrive at the estimated rates of
     inflation. Tell us the benchmark rate(s) for each period, and explain the
     reasons for any differences between the benchmark rate(s) and the inflation
     rates that you used.

RESPONSE: Note 4(n) on page F-19 and Note 3(c) on page F-93 now state as
follows:

     "The Company uses an inflation rate published by the US Department of Labor
     Bureau of Labor Statistics that excludes the more volatile items of food
     and energy."

     There are no differences between the benchmark rates and the inflation
rates previously disclosed in Forms 10-K or Forms 10-Q. For the years ended
December 31, 2004, and 2003, and for the six months ended June 30, 2005,
inflation rates employed for volumes consumed were, respectively, 1.15%, 2.00%,
and 2.16%.

65.  Disclose how you arrive at the credit-adjusted, risk-free interest rate for
     each period presented. Discuss the assumptions used in arriving at this
     rate.

RESPONSE: Note 4(n) on page F-19 now states as follows:

     "For the asset retirement obligations incurred in 2004, the Company
     estimated its credit-adjusted risk-free interest rate by adjusting the then
     current yield based on market prices of its $150 million Senior Secured
     Notes by the difference between the yield of a US treasury note of the same
     duration as the Senior Secured Notes and the yield on the 30 year U.S.
     Treasury Bond. For the asset retirement obligations incurred in 2003 and
     for the initial application of SFAS No. 143, the Company estimated its
     credit-adjusted risk-free interest rate by adjusting the then current yield
     on intermediate term debt of companies whose debt was then similarly rated
     by the rating agencies by the difference between the yield of a US treasury
     note of the same duration as the average maturity on the intermediate term
     debt and the yield on the 30 year U.S. Treasury Bond."

     The Company believes that the closure and post-closure liabilities are very
long-term in nature and that these liabilities should be tied to interest rates
for 30 year bonds; however, 30 year bonds are not issued by companies with
credit ratings similar to those of Clean Harbors. According to its SFAS No 143
Policy for 2003, the Company estimated its credit-adjusted risk-free interest
rate by observing the interest rates that companies of similar credit standing
are charged in the intermediate loan markets (loans of 5 to 10 years) and
adjusted this rate by the adding or subtracting the difference between the 30
year treasury bond rate and the rate of the appropriate intermediate treasury
note. In June 2004, the Company issued $150 million of Senior Secured Notes. The
Company now has better information as to its cost to borrow in the intermediate
loan market. Thus, the Company's stated policy has been slightly modified based

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on the better available information. On December 31, 2004, the Senior Secured
Notes were trading at 112%, which resulted in a yield to maturity at that time
of 9.29%. This market rate of interest was then adjusted by taking the
difference between the interest rate for a treasury security of the same
duration and the rate on the 30-year bond.

NOTE 11, LEGAL PROCEEDINGS
GENERAL ENVIRONMENTAL MATTERS, PAGE F-34

66.  Similar to the disclosures provided for remedial liabilities in Note 13,
     clarify whether you have concluded that additional losses in excess of
     amounts accrued for environmental matters are reasonably possible. If so,
     give an estimate of the possible loss or range of loss or state that such
     an estimate cannot be made. Provide a rollforward of the accruals recorded
     for general environmental matters for each period presented. For any
     individually material sites, provide the amount accrued and the reasonably
     possible additional losses. SEE SAB Topic 5:Y and SFAS 5.

RESPONSE: Note 11 on page F-36 and, with modifications, Note 7 on page F-101 now
state as follows:

     "The Company also estimates that it is "reasonably possible" as that term
     is defined in SFAS No.5 (more than remote but less than likely), that the
     amount of such total liabilities could be up to $3.0 million greater than
     such $35.4 million. Because all of the Company's reasonably possible
     additional losses relating to legal liabilities relate to remedial
     liabilities, the reasonably possible additional losses for legal
     liabilities are reflected in the tables of reasonably possible additional
     losses in Note 13, "Remedial Liabilities." The Company periodically adjusts
     the aggregate amount of such reserves when such potential liabilities are
     paid or otherwise discharged or additional relevant information becomes
     available to the Company."

     The following statement has also been included in Note 11 on page F-36 and,
with modifications, in Note 7 on page F-100:

     "Substantially all of the Company's legal proceedings liabilities are
     environmental liabilities and, as such, are included in the tables of
     changes to remedial liabilities disclosed as part of Footnote 13,
     Remedial Liabilities, on pages F-52 and F-53."

67.  For the matters in which you are not in complete agreement at this time on
     the scope of your indemnity obligations, clarify how you considered the
     lack of agreements in arriving at the amounts accrued. Disclose the
     estimated amount of liabilities that have not been recorded related to
     these indemnity obligations.

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Securities and Exchange Commission
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RESPONSE: Page F-107 (and, with modifications, pages F-42) now state:

     "However, the Company now believes that it has no liabilities that are both
     probable and estimable at this time, with respect to the potential cleanup
     of those four additional sites [which are the subject of the additional
     indemnity claims asserted by Safety-Kleen], and the Company has therefore
     not established any reserves for any potential liabilities of the Sellers
     in connection therewith. It is expressly the Company's legal position that
     it is not liable at any of the four sites for any and/or all of the
     Sellers' liabilities. In any event, at one site the potential liability of
     the Seller(s) is de minimis and a settlement has already been offered to
     the Seller(s) to that effect, and at one site the Company believes that the
     Seller(s) shipped no wastes or substances into the site and therefore the
     Seller(s) have no liability. For the other two sites, the Company cannot
     estimate the amount of the Sellers' liabilities, if any, at this time, and
     that irrespective of whatever liability the Sellers may or may not have,
     the Company reaffirms its position that it does not have any liability for
     any of the four sites including these two particular sites."

NOTE 15, COMMITMENTS AND CONTINGENCIES
LEASES, PAGE F-54

68.  Explain to us the reasons for the difference between the rent incurred over
     the last year and the annual minimum lease payments due over the next five
     years. For example, your rent expense was $32,300,000 in 2004 compared to
     non-cancellable lease amounts of $9,104,000 due in 2005. In your
     explanation, address any contingent rental amounts, cancelable leases, and
     leases with duration of less than one year incurred during the 2004 fiscal
     year. Also disclose how you account for (a) step rent provisions and
     escalation clauses and (b) capital improvement funding and other lease
     concessions that may be present in your leases. If, as we assume, they are
     taken into account in computing your minimum lease payments and the minimum
     lease payments are recognized on a straight line basis over the minimum
     lease term, the note should so state.

RESPONSE: Note 4(l) on page F-18 and Note 3(b) on page F-93 now state as
follows:

     "The Company leases rolling stock, equipment, real estate and office
     equipment under operating leases. Certain real estate leases contain rent
     holidays and rent escalation clauses. Most of the Company's real estate
     lease agreements include renewal periods at the Company's option. The
     Company recognizes rent holiday periods and scheduled rent increases on a
     straight-line basis over the lease term beginning with the date the Company
     takes possession of the leased space."

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Securities and Exchange Commission
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     Primarily to support its Site Service segment, the Company leases a wide
variety of equipment for short periods of time (i.e., for a day, week or month).
Under the accounting rules these rent payments fall under the definition an
operating lease. L10.112(c) of the Current Text states the following:

     "For all operating leases, rental expense for each period for which an
     income statement is presented, with separate amounts for minimum rentals,
     contingent rentals, and sublease rentals. Rental payments under leases with
     terms of a month or less or less that were not renewed need not be
     included."

     The difference between the rent expense for 2004 of $32,300,000 and the
non-cancelable lease amount due in 2005 of $9,104,000 consisted almost entirely
of rent payments on these short term rentals. The Company has chosen to include
in its disclosure of rent expense the expense relating to the short-term
rentals.

     If our assumption is incorrect, tell us how your accounting complies with
     SFAS 13 and FTB 88-1.

RESPONSE: The Company believes as discussed above that its accounting is in
compliance with SFAS No. 13 and FTB 88-1.

NOTE 18. REDEEMABLE SERIES C PREFERRED STOCK, PAGE F-60

69.  Tell us more about your accounting of the redeemable series C preferred
     stock. Address specifically these items with reference to the appropriate
     accounting literature:

     -    Tell us how you determined it was originally appropriate to record the
          series C preferred stock into two components.

RESPONSE: The Company determined that the conversion option embedded in the
Redeemable Series C Convertible Preferred Stock needed to be bifurcated pursuant
to paragraph 12 of SFAS No. 133. Specifically, paragraph 12 has three criteria
that if met would require a derivative embedded in a host contract to be
bifurcated. The first criteria that "the economic characteristics and risks of
the embedded derivative instrument are not closely related to the economic
characteristics of the host contract" was met because the economic
characteristics of the conversion option embedded in the Series C Preferred
Stock which had equity characteristics was not closely related to the economic
characteristics of its debt host (the $25 million Redeemable Series C Preferred
Stock with a 6% dividend - the "Host Contract"). The second criteria was met
because the Company was unable to identify any accounting literature that would
allow the "hybrid instrument" to be remeasured at fair value and therefore "the
contract ("the hybrid instrument") that embodies both the embedded derivative
instrument and the host contract is not remeasured at fair value under otherwise
applicable generally accepted accounting

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Securities and Exchange Commission
August 31, 2005
Page 28


principles with changes in fair value reported in earnings as they occur." The
third criteria for "a separate instrument with the same terms as the embedded
derivative instrument [which] would, pursuant to paragraphs 6-11, be a
derivative instrument subject to the requirements of this Statement" was met
because the embedded derivative met the requirements of paragraphs 6-11.

     In making this assessment, the Company considered whether the conversion
option would be eligible for the scope exception of FAS 133 stipulated in
paragraph 11a relating to derivatives indexed to a company's own stock and
whether such derivative would be classified in equity. To determine whether the
conversion option would meet the paragraph 11a scope exception, the Company
considered the guidance in EITF 00-19 "Accounting for Derivative Financial
Instruments Indexed to, and Potentially Settled in, a Company's Own Stock". In
assessing the conversion option under the criteria of EITF 00-19, since the
conversion option was subject to a potential reset provision (which could adjust
the number of shares to be delivered), the Company concluded that the conversion
option was embedded in a non-conventional convertible debt instrument. As a
result, all the provisions of EITF 00-19 were required to be considered to
determine whether or not the conversion option was required to be bifurcated. In
assessing the conversion option under the criteria in EITF 00-19, the Company
determined that it might be forced to cash settle the conversion option because
the Company could not then register common shares under the rules of the
Commission (because of the absence of audited statements of operations for the
CSD). The conversion option was therefore not eligible for the paragraph 11a
scope exception, and therefore it was required to be bifurcated under FAS 133
and recorded at fair value with changes in its fair value recorded currently in
earnings.

     To identify the host contract and the embedded derivative, the Company then
followed the guidance of paragraph 61 (l) of FAS 133. Because the Series C
Preferred Stock was a cumulative fixed-rate preferred stock that had a mandatory
conversion feature, the Company concluded that the instrument was more akin to
debt than to an equity instrument. The Company then concluded, in accordance
with paragraph 61 (k) of FAS 133, that because the changes in the fair value of
an equity instrument and the interest rates on the debt instrument were not
clearly and closely related, the embedded derivative (that is, the conversion
option) must be separated from the debt host in the Series C Preferred Stock.

     -    Tell us how you determined the appropriate amortization period for the
          preferred stock discount and the issuance costs of the redeemable
          preferred stock and how you determined that it was appropriate to
          accrete these amounts to additional paid-in-capital.

RESPONSE: The Company accounted for the preferred stock discount and the
issuance costs in accordance with Staff Accounting Bulletin Topic 3C. Under the
interpretive response, that Topic states:

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Securities and Exchange Commission
August 31, 2005
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     "Where fair value at date of issue is less than the mandatory redemption
     amount, the carrying value shall be increased by periodic accretions, using
     the interest method, so that the carrying amount will equal the mandatory
     redemption amount at the mandatory redemption date. The carrying amount
     shall be further periodically increased by amounts representing dividends
     not currently declared or paid, but which will be payable under the
     mandatory redemption features, or for which ultimate payment is not solely
     within the control of the registrant. Each type of increase in carrying
     amount shall be effected by charges against retained earnings or, in the
     absence of retained earnings, by charges against paid-in capital."

     The Company determined that the appropriate amortization period for
amortizing the preferred stock discount and the issuance costs was from the date
of issuance through the mandatory redemption date.

     -    Tell us specific factors that led to the change in value of the
          embedded derivative from December 31, 2003 to March 31, 2004 and from
          March 31, 2004 to June 30, 2004. Your explanation should refer to any
          relevant assumptions used in the Black-Scholes model.

RESPONSE: Volatility for all periods was fairly consistent at 90+%. The key
inputs into the Black-Scholes model for the periods ended December 31, 2003,
March 31, 2004 and June 30, 2004 were as follows:

<Table>
<Caption>
                                         December 31, 2003     March 31, 2004     June 30, 2004
                                                                             
Number of common shares subject to               3,267,745          3,316,761         3,369,830
conversion rights

Common stock market value                            $8.91              $7.41             $9.35
</Table>

     The number of common shares subject to the conversion rights under the
Black-Scholes model increased over time because the Company was not paying
dividends on the Series C Preferred Stock in cash; rather, those dividends
accrued and compounded. While the strike price of the conversion rights remained
constant at $8.00 per common share for all periods, the market value of the
common stock fluctuated significantly above and below the conversion price,
which resulted in large fluctuations in the value of the embedded derivative.

     -    Provide a detailed explanation of your accounting of the redemption of
          the series C preferred stock. Your explanation should discuss your
          accounting for the settlement of the embedded derivative and the
          valuation and accounting of the warrants issued.

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Securities and Exchange Commission
August 31, 2005
Page 30


RESPONSE: The Company amortized the issuance costs and the discount, and accrued
the dividends on the Series C Preferred Stock through June 30, 2004. This
resulted in a balance on June 30, 2004 just prior to the redemption of
$17,159,330 which included $1,963,070 of accrued dividends. The Company
negotiated the redemption price of the host with the holders of the Series C
Preferred Stock. The parties agreed to redeem the host for the sum of
$25,000,000 plus accrued dividends. The Company paid the accrued dividends, and
the Company redeemed the Series C Preferred Stock for $25,000,000. The carrying
value of the Series C Preferred Stock of $17,159,330 less the accrued dividends
of $1,963,070 less the $25,000,000 paid to redeem the Series C Preferred Stock
resulted in a "loss" $9,803,740 that was recorded to additional paid-in capital.

     The value of the embedded derivative as determined using the Black-Scholes
model was $11,163,077 as of the close of business on June 29, 2004, the day
prior to the redemption. The Company negotiated the redemption price of the
conversion option with the holders. As of June 30, 2004, the holders of the
Series C Preferred Stock were entitled under the terms of the Series C Preferred
Stock to then convert the Series C Preferred Stock into 3,369,830 shares of
common stock at a conversion price of $8.00 per share. The holders agreed to
settle part of the embedded derivative for cash in the amount of $362,500, and
the holders agreed to accept 2,775,000 common stock purchase warrants with an
exercise price of $8.00 per share. The value of the 2,775,000 warrants under the
Black-Scholes model of $9,192,612 was recorded to additional paid-in capital.
Since the holders accepted 594,830 fewer warrants than they were entitled to
under the terms of the Series C Preferred Stock in exchange for $362,500 paid in
cash, the Company recognized a gain on the settlement of the embedded derivative
that was recorded as a component of loss on refinancing of $1,607,965.

NOTE 23. SEGMENT REPORTING, PAGE F-69

70.  Disclose total assets for each reportable segment, and provide a
     reconciliation of the total reportable segments' assets to your
     consolidated assets as of each balance sheet date presented. Refer to
     paragraphs 27-32 of SFAS 131.

RESPONSE: Page F-76 now provides additional disclosure for total assets for each
reportable segment and geographical area for each balance sheet date presented.

71.  Disclose the types of amounts included in corporate revenues, cost of
     revenues, and selling, general and administrative expenses for each period
     presented. Also disclose why these amounts were not allocated to the other
     reportable segments. If any amounts are the elimination or reversal of
     transactions between reportable segments, present them separately. Also
     disclose what identifiable assets are included in the corporate assets
     amount as of each balance sheet date. SEE paragraphs 31 and 32 of SFAS 131.

RESPONSE: Pages F-74-76 now disclose the types of amounts included in corporate
revenues, cost of revenues, and selling, general and administrative expenses.
The corporate items are

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Securities and Exchange Commission
August 31, 2005
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managed separately and deemed to be insignificant to the total company and are
therefore not allocated to other reportable segments. A separate table which
discloses inter-segment transactions between reportable segments has also been
added. In addition, Note 23 now includes the detail of Corporate asset amounts
as of each balance sheet date.

NOTE 24. QUARTERLY DATA (UNAUDITED), PAGE F-72

72.  Disclose the reasons for the loss from operations in the first quarter of
     2003, the low profitability in the second quarter of 2003, and the net
     losses during these periods. SEE Item 302(a)(3) of Regulation S-K.

RESPONSE: Page F-78 now states as follows:

     "For the first quarter of 2003, the loss from operations of $0.7 million
     and the net loss of $7.2 million was a result of reduced revenues due to
     the seasonal nature of certain services, generally weak economic
     conditions, and the relatively short period of time that had passed since
     the Company's September 2002 acquisition of the Chemical Services Division
     of Safety-Kleen Corp. that precluded the Company from then eliminating
     duplicative costs that resulted from the acquisition."

     "For the second quarter of 2003, the reduced level of income from
     operations of $0.3 million and the net loss of $6.8 million was a result of
     generally weak economic conditions, and the relatively short period of time
     that had passed since the Company's September 2002 acquisition of the
     Chemical Services Division of Safety-Kleen Corp. that precluded the Company
     from then eliminating duplicative costs that resulted from the
     acquisition."

SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS, PAGE F-81

73.  Since revenue allowance is a critical accounting estimate, disclose changes
     in the revenue allowance in schedule II. Alternatively, tell us where these
     disclosures have been provided. SEE Rule 5-04 of Regulation S-X.

RESPONSE: Schedule II now includes the sales allowance at December 31, 2002,
2003 and 2004. While the Company has developed a methodology for estimating its
sales allowance at a point in time, due to certain limitations of its billing
system, the Company is unable to provide a rollforward of the allowance. The
Company will endeavor to make the necessary changes to its billing systems in
the future so that it can report changes to the sales allowance over time.

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Securities and Exchange Commission
August 31, 2005
Page 32


UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS AT MARCH 31, 2005

74.  As applicable, address the accounting comments above in your interim
     financial statements.

RESPONSE: The Company has reflected all applicable comments in its June 30, 2005
financial statements included both within the prospectus and the Company's Form
10-Q Report for the quarter ended June 30, 2005.

EXHIBITS

75.  Include an exhibit index immediately before the exhibits.

RESPONSE: Pages II-15 and II-16 of the Amendment contains an Exhibit Index.

EXHIBIT 23.1

76.  The independent public accounting firm must consent also to being named in
     the registration statement. SEE Rule 436 of Regulation C under the
     Securities Act, and revise.

RESPONSE: Exhibit 23.1 to the Amendment contains the consent of
PricewaterhouseCoopers LLP to being named under "Controls and Procedures" and
"Independent Registered Public Accounting Firm" in the prospectus included in
the Registration Statement.

SIGNATURES

77.  Clean Harbors Deer Park, L.P. as a registrant guarantor also must sign the
     registration statement. Further, the registration statement must be signed
     by a majority of the board of directors of any corporate general partner
     signing the registration statement. SEE instruction 1 for signatures on
     Form S-4, and revise.

RESPONSE: Page II-13 to the amendment adds Clean Harbors Deer Park, L.P. as a
registrant guarantor signing the Registration Statement. As in the case of Clean
Harbors LaPorte, L.P. and Harbor Industrial Services Texas, L.P., Clean Harbors
Deer Park, L.P. is a limited partnership whose sole general partner is Clean
Harbors of Texas LLC. Clean Harbors of Texas LLC has therefore signed the
Registration Statement on behalf of Clean Harbors Deer Park, L.P. and each of
those other two limited partnerships, and the executive officers and managers of
Clean Harbors of Texas LLC have signed the Registration Statement in those
respective capacities.

     In light of the substantial number of comments in the Comment Letter, the
Company and the Guarantors will defer filing a request for acceleration of the
effectiveness of the Registration Statement until such time as the Commission's
staff has had an opportunity to review the Amendment and the specific responses
to each of the comments set forth above in this letter. If

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Securities and Exchange Commission
August 31, 2005
Page 33


the staff advise that the Amendment and this letter adequately respond to such
comments, the Company and the Guarantors will then file a request for
acceleration. As described in the Comment Letter, the Company and the Registrant
Guarantors will acknowledge in such letter that (i) should the Commission or the
staff acting by delegated authority declare the Registration Statement
effective, it does not foreclose the Commission from taking any action of the
filing, (ii) the action of the Commission or the staff acting by delegated
authority in declaring the Registration Statement effective does not relieve the
Company from its full responsibility for the adequacy and accuracy of the
disclosure in the Registration Statement, and (iii) the Company may not assert
the staff's comments and the declaration of the Registration Statement's
effectiveness as a defense in any proceedings initiated by the Commission or any
person under the United States' federal securities laws. The Company will also
confirm in such letter that they are aware of their responsibilities under the
Securities Act and the Exchange Act as they relate to the proposed public
offering of the securities specified in the Registration Statement.

     Please contact either the undersigned or C. Michael Malm of this firm
should you have any questions or requests for additional information with
respect to this filing. Thank you for your assistance.

                                                Very truly yours,

                                                /s/ John D. Chambliss

                                                John D. Chambliss


cc:  Alan S. McKim, Chairman
     James M. Rutledge, Executive Vice President
     Carl d. Paschetag, Vice President and Treasurer
     C. Michael Malm, Esq.