OMB Approval 2700-0042

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<td colspan="5">1. CONTRACT ID CODE</td>
<td colspan="2">PAGE OF PAGES</td>
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<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>
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<td colspan="3"><blockquote>
<p>1</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>
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<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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<td colspan="9"></td>
<td></td>
<td colspan="5"><blockquote>
<p>RFQ 13-SSC-Q-02-30</p>
</blockquote></td>
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<td colspan="9">TO ALL RECIPIENTS OF RFQ 13-SSC-Q-02-30</td>
<td><strong>X</strong></td>
<td colspan="5">9B. DATED <em><strong>(SEE ITEM 11)</strong></em></td>
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<td colspan="9"></td>
<td></td>
<td colspan="5"><blockquote>
<p>APRIL 25, 2002</p>
</blockquote></td>
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<td colspan="9"></td>
<td></td>
<td colspan="5">10A. MODIFICATION OF CONTRACT/ORDER NO.</td>
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<tr class="even">
<td colspan="9"></td>
<td></td>
<td colspan="5"></td>
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<td colspan="9"></td>
<td></td>
<td colspan="5">10B. DATED <em><strong>(SEE ITEM 13)</strong></em></td>
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<td colspan="5">CODE</td>
<td colspan="4">FACILITY CODE</td>
<td></td>
<td colspan="5"></td>
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<td colspan="15">11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF
SOLICITATIONS</td>
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<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>
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<td colspan="15">12. ACCOUNTING AND APPROPRIATION DATA <em>(If
required)</em></td>
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<td colspan="15"><blockquote>
<p>N/A</p>
</blockquote></td>
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<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>
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<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>
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<td></td>
<td colspan="14">C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT
TO AUTHORITY OF:</td>
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<td></td>
<td colspan="14">D. OTHER Specify type of modification and
authority)</td>
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<td colspan="15">E. IMPORTANT: Contractor is not, is required to sign
this document and return copies to the issuing office.</td>
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<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 an answer to questions
received from a potential offeror.</p>
<p>Accordingly, RFQ 13-SSC-Q-02-30 is amended as follows:</p>
<p>1. "An answer to questions is provided."</p></td>
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<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>
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<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>
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<td colspan="7"></td>
<td colspan="8"><blockquote>
<p>James D. Huk II</p>
<p>Contracting Officer</p>
</blockquote></td>
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<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>
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<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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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

RFQ 13-SSC-Q-02-30

Page 2 of 2

Question 1: What exactly is being requested - a pressure
controller/calibrator, or a pressure

monitor? The difference in cost between the two items is several
thousand dollars.

Question 2: Is the pressure span of 0-15 psi in absolute or gauge mode?

Question 3: If the above item is \"absolute mode\", is the vendor
required to supply a vacuum pump?

**[Answer to all three questions:]{.underline}**

**In Section 4.11 of the Salient Characteristics, the Government is
specifically requesting an absolute pressure controller/calibrator.
Please note that the vendor is not required to supply the vacuum pump.**