OMB Approval 2700-0042

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<td colspan="8"></td>
<td colspan="5">1. CONTRACT ID CODE</td>
<td colspan="2">PAGE OF PAGES</td>
</tr>
<tr class="even">
<td colspan="8"><strong>AMENDMENT OF SOLICITATION/MODIFICATION OF
CONTRACT</strong></td>
<td colspan="5"></td>
<td>1</td>
<td>2</td>
</tr>
<tr class="odd">
<td colspan="3">2. AMENDMENT/MODIFICATION NO.</td>
<td colspan="4">3. EFFECTIVE DATE</td>
<td colspan="5">4. REQUISITION/PURCHASE REQ. NO.</td>
<td colspan="3">5. PROJECT NO. <em>(If applicable)</em></td>
</tr>
<tr class="even">
<td colspan="3"><blockquote>
<p>2</p>
</blockquote></td>
<td colspan="4"><blockquote>
<p>Ref. Block 16C.</p>
</blockquote></td>
<td colspan="5"><blockquote>
<p>N/A</p>
</blockquote></td>
<td colspan="3"></td>
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<tr class="odd">
<td colspan="2">6. ISSUED BY</td>
<td colspan="2">CODE</td>
<td colspan="3"><blockquote>
<p>64</p>
</blockquote></td>
<td colspan="4">7. ADMINISTERED BY <em>(If other than Item 6)</em></td>
<td colspan="2">CODE</td>
<td colspan="2"></td>
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<td colspan="7"><p>NASA/OFFICE OF PROCUREMENT</p>
<p>JOHN C. STENNIS SPACE CENTER</p>
<p>STENNIS SPACE CENTER, MS 39529-6000</p></td>
<td colspan="8"><blockquote>
<p>SAME AS BLOCK 6</p>
</blockquote></td>
</tr>
<tr class="odd">
<td colspan="9">8. NAME AND ADDRESS OF CONTRACTOR <em>(No. Street,
county, State and ZIP: Code)</em></td>
<td>()</td>
<td colspan="5">9A. AMENDMENT OF SOLICITATION NO.</td>
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<tr class="even">
<td colspan="9"></td>
<td></td>
<td colspan="5"><blockquote>
<p>RFO 13-SSC-O-02-28</p>
</blockquote></td>
</tr>
<tr class="odd">
<td colspan="9">TO ALL RECIPIENTS OF RFO 13-SSC-O-02-28</td>
<td><strong>X</strong></td>
<td colspan="5">9B. DATED <em><strong>(SEE ITEM 11)</strong></em></td>
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<tr class="even">
<td colspan="9"></td>
<td></td>
<td colspan="5"><blockquote>
<p>APRIL 18, 2002</p>
</blockquote></td>
</tr>
<tr class="odd">
<td colspan="9"></td>
<td></td>
<td colspan="5">10A. MODIFICATION OF CONTRACT/ORDER NO.</td>
</tr>
<tr class="even">
<td colspan="9"></td>
<td></td>
<td colspan="5"></td>
</tr>
<tr class="odd">
<td colspan="9"></td>
<td></td>
<td colspan="5">10B. DATED <em><strong>(SEE ITEM 13)</strong></em></td>
</tr>
<tr class="even">
<td colspan="5">CODE</td>
<td colspan="4">FACILITY CODE</td>
<td></td>
<td colspan="5"></td>
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<tr class="odd">
<td colspan="15">11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF
SOLICITATIONS</td>
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<tr class="even">
<td colspan="15"><p> The above numbered solicitation is amended as set
forth in Item 14. The hour and date specified for receipt of Offers is
extended, is not extended.</p>
<p>Offers must acknowledge receipt of this amendment prior to the hour
and date specified in the solicitation or as amended, by one of the
following methods:</p>
<p>(a) By completing Items 8 and 15, and returning one (1) copy of the
amendment; (b) By acknowledging receipt of this amendment on each copy
of the offer submitted; or (c) By separate letter or telegram which
includes a reference to the solicitation and amendment numbers. FAILURE
OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE
RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATA SPECIFIED MAY RESULT IN
REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to
change an offer already submitted, such change may be made by telegram
or letter, provided each telegram or letter makes reference to the
solicitation and this amendment, and is received prior to the opening
hour and data specified.</p></td>
</tr>
<tr class="odd">
<td colspan="15">12. ACCOUNTING AND APPROPRIATION DATA <em>(If
required)</em></td>
</tr>
<tr class="even">
<td colspan="15"><blockquote>
<p>N/A</p>
</blockquote></td>
</tr>
<tr class="odd">
<td colspan="15"><p>13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF
CONTRACTS/ORDERS,</p>
<p>IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.</p></td>
</tr>
<tr class="even">
<td>()</td>
<td colspan="14">A. THIS CHANGE ORDER IS ISSUED PURSUANT TO:
<em>(Specify authority)</em> THE CHANGES SET FORTH IN ITEM 14 ARE MADE
IN THE CONTRACT ORDER NO. IN ITEM 10A.</td>
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<td></td>
<td colspan="14"></td>
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<td></td>
<td colspan="14">B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO
REFLECT THE ADMINISTRATIVE CHANGES <em>(such as changes in paying
office, appropriation date, etc.)</em> SET FORTH IN ITEM 14, PURSUANT TO
THE AUTHORITY OF FAR 43.103(b).</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="14">C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT
TO AUTHORITY OF:</td>
</tr>
<tr class="even">
<td></td>
<td colspan="14">D. OTHER Specify type of modification and
authority)</td>
</tr>
<tr class="odd">
<td colspan="15">E. IMPORTANT: Contractor is not, is required to sign
this document and return copies to the issuing office.</td>
</tr>
<tr class="even">
<td colspan="15"><p>14. DESCRIPTION OF AMENDMENT/MODIFICATION
<em>(Organized by UCF section headings, including solicitation/contract
subject matter where feasible.)</em></p>
<p>The purpose of this amendment is to provide answers to questions
received from potential offerors and extend the closing date for receipt
of offers. Accordingly, RFO 13-SSC-O-02-28 is amended as follows:</p>
<ol type="1">
<li><p>"The closing date for receipt of offers is extended through
<strong><u>May 10, 2002</u>.</strong>"</p></li>
</ol>
<p>2. "Answers to questions are provided."</p></td>
</tr>
<tr class="odd">
<td colspan="15">Except at provided herein, all terms and conditions of
the document referenced in Item 9A or 10A, as heretofore changed,
remains unchanged and in full force and effect.</td>
</tr>
<tr class="even">
<td colspan="7">15A. NAME AND TITLE OF SIGNER <em>(Type or
print)</em></td>
<td colspan="8">16A. NAME AND TITLE OF CONTRACTING OFFICER <em>(Type or
print)</em></td>
</tr>
<tr class="odd">
<td colspan="7"></td>
<td colspan="8"><blockquote>
<p>James D. Huk II</p>
<p>Contracting Officer</p>
</blockquote></td>
</tr>
<tr class="even">
<td colspan="6">15B. CONTRACTOR/OFFEROR</td>
<td>15C. DATE SIGNED</td>
<td colspan="6">16B. UNITED STATES OF AMERICA</td>
<td colspan="2">16C. DATE SIGNED</td>
</tr>
<tr class="odd">
<td colspan="6"><p>________________________________________________</p>
<p><em>(Signature of person authorized to sign)</em></p></td>
<td></td>
<td colspan="6"><p>BY _____________________________________________</p>
<p><em>(Signature of Contracting Officer)</em></p></td>
<td colspan="2"></td>
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</table>

NSN 7540-01-152-8070 30-105 STANDARD FORM 30 (REV. 10-83)

PREVIOUS EDITION UNUSABLE Computer Generated Prescribed by GSA

FAR (48 CFR) 53.243

RFO13-SSC-O-02-28

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**ANSWERS TO QUESTIONS**

+---+-------------------------+----------------------------------------+
| * | **Question**            | **Response**                           |
| * |                         |                                        |
| N |                         |                                        |
| o |                         |                                        |
| . |                         |                                        |
| * |                         |                                        |
| * |                         |                                        |
+---+-------------------------+----------------------------------------+
| 1 | Section 2.0: Is a copy  | An electronic copy in PDF format is    |
|   | of SSC Drawing          | enclosed for review.                   |
|   | 54000-GP11, Packaging   |                                        |
|   | and Preservation of     |                                        |
|   | Cleaned Components"     |                                        |
|   | available?              |                                        |
+---+-------------------------+----------------------------------------+
| 2 | Section 6.0: Does the   | Both gas tube trailers shall be        |
|   | Contractor provide      | configured with a 6,000-psig isolation |
|   | tubing and isolation    | valve on each cylinder. These valves   |
|   | valves?                 | shall be removed for cylinder cleaning |
|   |                         | and temporarily packaged per 54000     |
|   |                         | GP11 to maintain their cleaning level. |
|   |                         | After cylinder cleaning, the           |
|   |                         | Contractor shall re-install the valves |
|   |                         | on each cylinder and provide the       |
|   |                         | 20-psig-gas blanket as per the         |
|   |                         | transportation requirements of         |
|   |                         | paragraph 7.B.                         |
+---+-------------------------+----------------------------------------+
| 3 | Section 6.0: Is the     | NASA shall leak test the cylinders and |
|   | Contractor responsible  | new manifold to 6,000 psig at SSC. The |
|   | for leaking testing     | Contractor is not responsible for      |
|   | each tube to 6,000 psig | leaks or leak testing at 6,000 psig or |
|   |                         | any components installed by NASA.      |
+---+-------------------------+----------------------------------------+
| 4 | Section 7.0. Who is     | The Contractor is responsible for      |
|   | responsible for the     | transporting both gas tube trailers    |
|   | cost of transporting    | (TT-216-HE and TT-217-HE) to the       |
|   | the equipment from      | Contractor's facility and back to      |
|   | Stennis to the          | Stennis. Both trailers were certified  |
|   | Contractor facility?    | to be road worthy per DOT requirements |
|   |                         | September, 2001                        |
+---+-------------------------+----------------------------------------+
| 5 | What is the weight and  | The skid length is 37'-4", width is    |
|   | dimensions of one of    | 8'-0", and its height is 8'-0".        |
|   | the gas tube trailer?   | Electronic drawings are not available. |
|   |                         | The skid weight is approximately       |
|   |                         | 53,000 lbs                             |
+---+-------------------------+----------------------------------------+
| 6 | Will SSC provide a      | A crane is not necessary to move these |
|   | crane for loading the   | trailers. Both trailers were certified |
|   | skid?                   | to be road worthy per DOT requirements |
|   |                         | September, 2001                        |
+---+-------------------------+----------------------------------------+
| 7 | Is external coating     | Paint shall be removed from areas      |
|   | removal and re-painting | where surface pitting or corrosion is  |
|   | included in the scope   | suspect. Repaint cylinder with a       |
|   | of work?                | finish coat.                           |
+---+-------------------------+----------------------------------------+
| 8 | Are there any drawings  | Drawings and pictures of the gas tube  |
|   | showing the exact       | trailers are attached.                 |
|   | configuration of the    |                                        |
|   | gas tube trailers?      |                                        |
+---+-------------------------+----------------------------------------+
| * | **Question**            | # Response                             |
| * |                         |                                        |
| N |                         |                                        |
| o |                         |                                        |
| . |                         |                                        |
| * |                         |                                        |
| * |                         |                                        |
+---+-------------------------+----------------------------------------+
| 1 | Is there information on | NASA does not have manufacturing       |
| 0 | the cylinder outlet?    | drawings on each tube. However, the    |
|   |                         | outlet on the cylinders appears to be  |
|   |                         | 1-inch NPT.                            |
+---+-------------------------+----------------------------------------+
| 1 | Are there any solvents  | Ensolv was recently added to the list  |
| 1 | not listed in the SSC   | of approved solvents for precision     |
|   | Standard 79-001 that    | cleaning and verification for this     |
|   | are approved for use to | Skid.                                  |
|   | meet Level 1            |                                        |
|   | Cleanliness Levels?     |                                        |
+---+-------------------------+----------------------------------------+
|   |                         |                                        |
+---+-------------------------+----------------------------------------+

All potential offerors shall provide the following with their offers:

1.  Proposed project schedule with start and stop dates.

2.  Location where the skid shall be cleaned.

3.  Copies of detailed cleaning procedure that meets SSC Standard 79-001
    Level 1 requirements.