OMB Approval 2700-0042

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<tbody>
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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>4</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>1</p>
</blockquote></td>
<td colspan="4"><blockquote>
<p>See Block 16C</p>
</blockquote></td>
<td colspan="5"></td>
<td colspan="3"></td>
</tr>
<tr class="odd">
<td colspan="2">6. ISSUED BY</td>
<td colspan="2">CODE</td>
<td colspan="3"></td>
<td colspan="4">7. ADMINISTERED BY <em>(If other than Item 6)</em></td>
<td colspan="2">CODE</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td colspan="7"><blockquote>
<p>NASA Procurement Office Code DA20</p>
<p>John C. Stennis Space Center</p>
<p>Stennis Space Center, MS 39529-6000</p>
<p>ATTN: Rob Harris (<a
href="mailto:robert.harris@ssc.NASA.gov">robert.harris@ssc.NASA.gov</a>,
(228)-688-3862)</p>
</blockquote></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>
</tr>
<tr class="even">
<td colspan="9"></td>
<td></td>
<td colspan="5"><blockquote>
<p>13-SSC-O-02-37</p>
</blockquote></td>
</tr>
<tr class="odd">
<td colspan="9"><blockquote>
<p>TO ALL PROSPECTIVE BIDDERS</p>
</blockquote></td>
<td><strong>X</strong></td>
<td colspan="5">9B. DATED <em><strong>(SEE ITEM 11)</strong></em></td>
</tr>
<tr class="even">
<td colspan="9"></td>
<td></td>
<td colspan="5"><blockquote>
<p>July 3, 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>
</tr>
<tr class="odd">
<td colspan="15">11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF
SOLICITATIONS</td>
</tr>
<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:(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>
</tr>
<tr class="odd">
<td></td>
<td colspan="14"></td>
</tr>
<tr class="even">
<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: <strong>Contractor is required to sign
this document and return <u>_1_</u> copy to the issuing
office.</strong></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>SEE CONTINUATION PAGES</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>
</tr>
</tbody>
</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

13-SSC-O-02-37

Amendment 1

Page 2 of 4

**A.** The purpose of this amendment is answer contractor's questions,
change the "required delivery

schedule" of line items 0001 and 0002, and extend the bid opening date
to July 31, 2002. Solicitation

13-SSC-O-02-37 is hereby amended as follows:

**B.** The following contractor questions were received and the
following responses are hereby provided:

1\. Question: Is ASME BPV "Code Stamping" required on pressure vessel?

Answer: No

2\. Question: Paragraph 4.0: [Filter Assembly Materials]{.underline} -
"All pressure containing piece parts shall

> be machined forgings.", Is bar stock and/ or pierced seamless tubing
> allowable?

Answer: Not for the housing or external pressure boundaries. But ok on
internal piece parts.

3\. Question: Filter Data Sheet #GF-10A2283-GH -- Housing Material
allows use of Type TPXM-11

(Nitronic 40) material, Filter Data Sheet #GF-10A2284-GN and
#GF-10A2285-GN do

not. Is this an oversight OR IF NOT can Nitronic 40 be used for these
applications as

well?

Answer: Nitronic 40 is allowed.

4.  Question: Design Requirements Para 3.0 page 3 states: "All welds and
    brazed joints shall be

> accessible to visual inspection and shall be 100% dye penetrant
> inspected.....". It is not
>
> desirable to dye penetrant inspect filter elements due to the
> resultant contamination of
>
> the element and subsequent difficulty in attaining the required
> cleanliness level of the
>
> deliverable part.

Answer: The specification requires that the design allow for precision
cleaning for LOx service.

The filter design shall enable the removal of all contamination
including dye penetrant.

However, alternate methods of weld inspection may be proposed for our
consideration.

5.  Question: 3.2.1 [Wire Cloth]{.underline} -- Table 1, Wire Cloth as
    defined per Table 1; i.e., 30x30 Mesh and

> .0065" wire diameter as well as 60x60 Mesh and .0060" wire diameter
> are not available
>
> in a twilled weave pattern configuration. Manufacturers state that it
> is not feasible to
>
> produce a twilled weave pattern at a ratio above 1.3 in terms of
> opening
>
> dimension/wire diameter; i.e., 30x30x0065 wire diameter would equate
> to
>
> 0.0268/.0065 = 4.12 . Therefore, both Mesh requirements, 30x30 and
> 60x60 will have
>
> to be plain square weave configurations. Also, the 60x60 does not
> appear to be
>
> available at a 0.0060 wire diameter; it is available at a 0.0065 wire
> diameter.
>
> Answer: Plain square weave maybe acceptable provided our concerns with
> regards to individual
>
> wires shifting around within the weave pattern are addressed. Using
> plain square weave
>
> with larger wire diameter is acceptable provided the operating
> pressure drop conforms to
>
> the specification.

13-SSC-O-02-37

Amendment 1

Page 3 of 4

6.  Question: 3.2.2 [Support Structure]{.underline} - "The support
    structure members, screen retainer ring,

supporting wire meshes, and fine wire mesh shall be brazed at all points
of

contact......". Request option to allow for Resistance and/or TIG
welding as applicable

in lieu of brazing.

Answer: Ok to weld.

7.  Question: 3.2.4 Screen Retainer Supporting Ring -- "If used, the
    wire cloth retainer support ring

shall be mechanically connected to the screen retainer support ring.
Assume that

"mechanically connected" means that it could also be resistance and/or
TIG welded.

Answer: Yes

8.  Question: The solicitation table shown on page 2 identifies Item
    0004 as a 4 inch size where as

the specification says it is a 6 inch size. We assume the specification
is correct.

Answer: 6 inch is the correct size.

9.  Question: Specification 110GK-GMF10 and 110GK-GMH9 data sheets have
    an asterisk

> indicating the manufacture should fill in the \"Operating Pressure
> Drop for each of the
>
> filters/Screen Assemblies. The specification shows a \"Maximum
> allowed\" pressure
>
> drop already for the filters covered by these documents. Does Stennis
> expect the
>
> manufacture to enter the estimated pressure drop for information only?

Answer: Yes.

10. Question: It appears the contraction and expansion losses from the
    Connections with no

> allowance for screen loss will exceed some of the maximum allowed
> pressure drop
>
> requirements listed on the data sheets. Does the \"Operating Pressure
> Drop\" asterisk
>
> refer to the element only pressure drop?

Answer: No, the pressure drop was intended to be for inlet to outlet.
However, provide your

predicted delta pressure for us to evaluate.

11. Question: Specification 110GK-GMF10 indicates a Maximum Allowed
    Housing I.D. of 4.25\" for

> the gaseous nitrogen filters. We are concerned with the annulus around
> the element
>
> given this limitation on the I.D. If we make the element smaller the
> pressure drop
>
> increases even more. Is the 4.25\" dimension a hard requirement?

Answer: No. Internal volume needs to be minimized as much as possible,
especially annulus

region around the element. Tapering the ID of the housing to minimize
internal volume

is an option. The housing ID should 6.25" or less.

13-SSC-O-02-37

Amendment 1

Page 4 of 4

12\. Question: Maximum allowed housing I.D. is stated as 4.25". Good
design practices demand that the

element ID be not less than the outlet line bore. In this case the line
bore is 3.825" per

ACK1 piping specification. Allowing for a support design suitable for
the collapse

pressure, adequate wire area, external protective sleeve and required
inlet flow area

around the element, we anticipate that 6.25" ID would be required?

Answer: Internal volume needs to be minimized as much as possible,
especially annulus region

around the element. Tapering the ID of the housing to minimize internal
volume is an

option. The housing ID should 6.25" or less.

13\. Question: Request the required delivery of items 1 & 2 be NLT 105
days after issuance of a contract?

Answer: Approved. Contract clause 52.211-9, is hereby changed to reflect
that line items 0001 and

0002, Required Delivery Schedule, be changed from as reads "84 days" to
read: "105 days".

(Note this change in required delivery schedule only affects line item
0001 and 0002.)

**C.** SF1449, Block 8, titled "Offer Due Date/Local Time", is hereby
changed from "July 24, 2002..." to

Read: "July 31, 2002 Not Later Than 3:00pm".

**D.** All other terms and conditions remain the same.