ML20127B687

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Amend 1 to Issue a to Procedure CP-803, Excavation & Backfill
ML20127B687
Person / Time
Site: Waterford Entergy icon.png
Issue date: 04/01/1984
From: Stanley E
EBASCO SERVICES, INC.
To:
Shared Package
ML17198A241 List: ... further results
References
FOIA-84-455 CP-803-A-01, CP-803-A-1, NUDOCS 8506220027
Download: ML20127B687 (8)
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' E3ASCO SIMICES 2NCORP0aAT:'3 Y 1=*AT::7.T02 STE.U! II.IORIC STA*" CN - Ch* T : 0 3 FROCDURE TOR FROCCURE :.".'3 23 EXCAVATION AND BACKFILL CP-803

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DESC11FT.'CN CF ADDITIONS /DE:.E:".058/CIANGEE:

(1) Delete e.2.11 (2) Add the following paragraphet 6.3 Inspection *of Excavation /Sackfill activities 6.3.1 Quality Control shall perform inspection of escavation/ backfill activities which entend below the water table in clase "A" fill.

C.C. shall be notified at this time. Insineering shall perfo m inspection of emeavation/ backfill activittee which do not entend below the water table. Inspection of escavation/bukfill activities in class "A" fill shall be documented on the attached "Escavation/lackfill Inspection Report". (Fo n CP-403-1) 6.3.2 Ensiseering shall perf orm taopection of Encavettes/teckfill activities in class "B" fill den determined necessary by the Seator Resident Engineer. Inepection of escavation/hackfill activities in class "B" fill shall be documented on the attached

" Engineering !aspection Report" (Tom No. I-133)

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1.0 Pt'E POSE

! l 1.1 The purpose of this procedure is to ensure that the methods used for excavation. handling of material. placement and compaction of

backfill is performed in a manner consistent with the site I specification and design drawings.

2.0 SCOPE 2.1 This procedure covers all areas requiring excavation and backfill of

.. Seismic Class I and Nonssianic soil materials. t 5

3.0 REFERENCES

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3 3.1 Ebasco Specification No.1.0U 1564.482 - Filter and Backfill Seismic

. Class I 3.2 Ebasco Specification No. 1.00 1564.474 - Specification for Dewatering a and Excavation

'3 j 5 3.3 17 Underground Piping

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3.4 WQC Control of Receiving, Handling and Storage of Materials and j 5 Soils ,

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w 3.5 ASTM-D1557 Moisture-Density Relations of soile and Soil Aggregate g Mixtures Using 10 lb. Rammer and 13 inch Drop

$ 3.6 A51M-D2167 Density of Soil in Place by the Rubber Balloon Method.

1' 4.0 DEFINITIONS 8 4.1 Engineer - Ebasco Constructore m t

4.2 Class A Backfill Material - Sand with no more than 121 passing the E #200 seiwe (locally haown as pumped river eend). This material 0 shall have en in-place relative density of 75 percent (3). The ,

e minimum allowable density shall be 95% of Modified Proctor.

W 5 4.2.1 Fleistocene clay - use only if filter blanket to disturbed.

n j 4.3 Class B Backfill Material - This estarial shall be sand. Shell any be contained in this motorial. The shell shall be eeund and amply bedded in the finer asteriale.

5.0 RESPONSIBILiff 5.1 Senior Resident tagineer' or his designee shall be reopenethie for providing the necessary engineering espport and inspection (non-eatety only) se required to comply with this procedure and the requirements of the referenced specificatione se further defined therein.

5.2 the Cenetruction Superintendent or his destenee shall be responsible for the overall taptementation of this procedure.

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l 5.3 $1tc 0011 Testir.; .35crat ry shall pe rf e rt. all tests required te support this procedure, 6.0 PROCEDURE f

6.1 Escavation 6.1.1 All escavation of estating Clase A and/or Clase 5 fill areas shall be coordinated through the Engineer prior to beginning work.  ;

D 6.1.1 Clase A and Clase 5 fill arose will not be excavated below f E the water table elevation without Engineering inepection of the area for possible dowatering requiremente.

6.1.3 Excavation of fill shall be performed in a manner which will C not disturb surrounding compacted fill areas or damage

$ . existing plant componente.

N 6.I.4 Slopes of open excavatione shall be protected from inclement  ;

$ weather or other f actors which any cause erosion, undermining 5 of subourface structures, or other lose of fill material. s i::

6.1.5 Whenever possible, the open cut method of escavation shall be 3 utilised with banha sloped er stepped se required by the ,

w nature of the soil.

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$ 6.1.6 Sheetpiling or shoring will be used in areas where g 1seufficient area is available for opes cute. All sheetpiling and eherias plena will be submitted to the Eagleser for review and approval before procedtag with work.

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3 4.1.7 Bacavated material espected to be used se backfill will be

, stockpiled a este distance away free escaveties or will be  ;

apread is meerby leastione se assessary.

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" 6.1.8 Escavated material useuttable for use se backfill will be hauled to a opeil area deetsaated by the Engineer.

b. 6.1.9 Rata water er ground water escurring ,in the escavetten will Ti be reaeved with portable pumpe using adequate diosherse hees  ;

D and screase to coevey the water into the plant drataage '

I system without disrupting other operatiosa.

6.2 Bashf111 1 4.2.1 Areas to rese1ve beektill aball be free of sed, wood er other foreign matter. The area shall then be leveled and meistened to optimum meisture and seepeated until the surface 1e smooth and free of lorse amevate of leese aster 141.

r-4.2.2 When backfill to to be placed on estural greved, strip all eed er top ooil to a depth of 6". or a depth necessary to

, remove uneeund asterial.

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  • DASC0 .EKMCUS INCORPOLCzD  %. CP-803 n tarcRa s txt I:. c:a:e s .c:es - :::: so. 3 i nce: a or <.

J m., x 6.2.3 When fill in to te placed en previously pisced fill which has l

been in place for several days, the surface shall be j moistened es necessary and recompacted.

I 6.2.4 Moisture content and tests. if required by Ebasco

Specification LCU 1564.482, design drawings or the Engineer, shall be performed on excavated area prior to beginning backfill operations.

6.2.5 Should the existing mater 14.1 contain moisture in excess of permissible liuits such as ground water, etc., a blanket lif t W of dry fill material any be placed over the wet fill to soak j up excess moisture. The blanket fill shall be compacted by

, suitable means as approved by the Engineer and then tested to

- determine the in-place density if possible.

a b 6.2.5.1 If the blanket lift meets the established density y . requirements, backfilling shall continue in a normal w aanner. ,

W j 6.2.5.2 If the blanket litt does not meet the established density requirements, the next lift of mater 4a1 shall ts p; be placed and compacted, and the tests of the

blanket lif t performed by digging back down to the i blanket lift te verify the in-place density and g integrity of the, fill.

h 6.2.6 Backfill will be placed in 15" maximus loose litts with each -

lii lif t being meistened to near optimum moisture and compacted with rollers or, in the case of limited access, with hand propelled tempers. ..

3 6.2.7 The in-place density shall be tested is accordance with m ASTM-01334 er AgTM-D2167. A minimum of one density test will

'j be takes for every 20.000 square feet of Class A fill and one for every 40.000 square feet of Class 3 fill.

y m 6.2.8 nackfill operatisse shall be halted during inclement weather j and if poselble, ensavetten protected free escoes asisture.

) y Refere continuing with backfill operations, fill areae  !

j g empeoed to the weather eksil be iroe of all standing water.

a surface permitted to dry and meisture content of soil tested for essessive meisture.

6.2.9 squipeest used for hauling shall follow different pathe ever nearby compacted fill areas to aid compaction of entire area '

f and to aveld over compacties of any see area.

6.2.10 Special care shall be esercised when placing and compacting

, fill near antating plant componente and waterproofing to prevent damage to these structures. .

6.2.11 Class A backfill shall be inspected per the requirements of WQC-1 and Clase 8 backfill shall be toepected per 17-3.

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\ n l CP-!03-1 EBASCO SERVICES INCORPORATED

    • ATERFORD 'a*IT NO. 3 EXCAVATION /BACKFII.I. INSPECTION REPORT Inspector Oate Fill Area / Location Contr. El.

Till Surface Area Sq. Tt. -

Barrev material released as backfill: Yes No Spreading and Compaction equipment satisfactory: Yes No Base Density Acceptable for Backfill Yes No Base Sicpes Acceptable for Backfill: Yes No Backfilling done in proper sequence: Yes No Till material properly placed ar.d spread to a saxinum lease thickness of 13 inchast l

Yes No l

1,1ft surface reasonably smooth and fras of ridges or grooves: .'e s No Hau11st equipment using dif ferent pather Yes No Fill Juncticas properly treated: Yes No Layer compacted to full width: Yes No Till meterial less than 3 inches in size in restricted areas Yes No Vaterproofing membrane protecteJ 'during backfill operationes Yes No Backfill against waterproofing esebrane contains only material less than h inch -

Yes No*

In-Flace density testing properly performedt Yes No Comments:

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