Amendment 0003 7286584.pdf

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SPECIFICATION

7286584 Repair Spill Gate #2

MCAS Cherry Point, NC

AMENDMENT #0003

IMPORTANT

This amendment should be acknowledged when your proposal is submitted. Failure to acknowledge the amendment may constitute grounds for rejection of the proposal.

If your proposal has been submitted prior to the receipt of this amendment, acknowledgement should be made by telegram, which should state whether the price contained in your proposal is to remain unchanged, is to be decreased by an amount, or is to be increased by an amount. The acknowledgement must be received prior to proposal opening time.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE PAGE OF PAGES

1 2

2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicable)

0003 07/29/2024 7286584

6. ISSUED BY Code N40085 7. ADMINISTERED BY (If other than item 6.) Code CG MCAS Cherry Point

FACILITIES, ROICC

B-87, 748 Roosevelt Blvd.

PSC BOX 8006

CHERRY POINT, NC 28533

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) 9A. AMENDMENT OF SOLICITATION

Repair Spill Gate #2

9B. DATED (SEE ITEM 11)

AMENDMENT MUST BE ACKNOWLEDGED WITH YOUR PROPOSAL 10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

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. 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 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 DATE 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 date specified.

12. ACCOUNTING AND APPROPRIATION DATA (if required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS,

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14. ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATION CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103 (b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER: (specify type of modification and authority)

E. IMPORTANT: Contractor is not is required to sign this document and return original to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

7286584 Repair Spill Gate #2, Marine Corps Air Station Cherry Point, NC

Amendment 0003 is being issued to answer pre-award RFI’s and provide a revised Spec section 31 23 00.00 20 and updated submittal registry.

The deadline to submit pre-award RFI’s has passed. No further RFI’s will be accepted.

The proposal due date of 01 August 2024 at 12:00 PM local time REMAINS unchanged.

See Attached.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

15B. CONTRACTOR/OFFEROR (Same as Item 8) 15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED

BY

(Signature of person authorized to sign) (Signature of Contracting Officer)

NSN 7540-01-152-8070 30-105 STANDARD FORM 30 (REV.1-83) 0224-3(10-90)

PREVIOUS EDITION UNUSABLE Prescribed by GSA

Amendment 0003 7286584 Repair Spill Gate #2

RFI Responses:

1. What is the anticipated start date for this project?

Response: This is a straddle project meaning it could be awarded in FY24 or 1st quarter of FY25.

2. Is a geo‐tech report available?

Response:

Submit proposals in accordance with RFP, Specifications, Drawings and all amendments.

NOTE ‐ No

3. What is the depth of the existing rip rap to be removed and reused?

4. What is the depth of the proposed rip rap in the embankment and spill way areas?

5. Is there a location to dispose of non‐contaminated waste/soil on base?

6. Is there a location to dispose of contaminated soil on base?

Subj: AMENDMENT TO WO 7286584 REPAIR SPILL GATE #2, MCAS CHERRY POINT NC

CONTINUATION SHEET

PROJECT TABLE OF CONTENTS

SECTION 31 23 00.00 20 is deleted and 31 23 00.00 20 dated 07/25/24, as shown in the footer, is added to the Project Table of Contents and accompanies this Amendment.

The Submittal Register contained in Specification 01 33 has been deleted, and Submittal Register dated 07/25/24 as shown in the footer, is added to the project and accompanies this Amendment.

7286584 REPAI R SPI LL GATE #2 CHERRY POI NT, NC

SECTI ON 31 23 00. 00 20

EXCAVATI ON AND FI LL

02/ 11, CHG 2: 08/ 15

PART 1 GENERAL

1. 1 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by t he basi c desi gnat i on onl y.

AMERI CAN WATER WORKS ASSOCI ATI ON ( AWWA)

AWWA C600 ( 2017) I nst al l at i on of Duct i l e- I r on Mai ns and Thei r Appur t enances

AMERI CAN WELDI NG SOCI ETY ( AWS)

AWS D1. 1/ D1. 1M ( 2020; Er r at a 1 2021) St r uct ur al Wel di ng Code - St eel

ASTM I NTERNATI ONAL ( ASTM)

ASTM C136/ C136M ( 2019) St andar d Test Met hod f or Si eve Anal ysi s of Fi ne and Coar se Aggr egat es

ASTM D1140 ( 2017) St andar d Test Met hods f or Det er mi ni ng t he Amount of Mat er i al Fi ner t han 75- µm ( No. 200) Si eve i n Soi l s by Washi ng

ASTM D1556/ D1556M ( 2015; E 2016) St andar d Test Met hod f or Densi t y and Uni t Wei ght of Soi l i n Pl ace by Sand- Cone Met hod

ASTM D1557 ( 2012; E 2015) St andar d Test Met hods f or Labor at or y Compact i on Char act er i st i cs of Soi l Usi ng Modi f i ed Ef f or t ( 56, 000 f t - l bf / f t 3) ( 2700 kN- m/ m3)

ASTM D2216 ( 2010) Labor at or y Det er mi nat i on of Wat er ( Moi st ur e) Cont ent of Soi l and Rock by Mass

ASTM D2321 ( 2014; E 2014) St andar d Pr act i ce f or Under gr ound I nst al l at i on of Ther mopl ast i c Pi pe f or Sewer s and Ot her Gr avi t y- Fl ow Appl i cat i ons

ASTM D2487 ( 2011) Soi l s f or Engi neer i ng Pur poses ( Uni f i ed Soi l Cl assi f i cat i on Syst em)

ASTM D3786/ D3786M ( 2013) Hydr aul i c Bur st i ng St r engt h of Text i l e Fabr i cs- Di aphr agm Bur st i ng St r engt h Test er Met hod

ASTM D4318 ( 2017) St andar d Test Met hods f or Li qui d

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Li mi t , Pl ast i c Li mi t , and Pl ast i c i t y I ndex of Soi l s

ASTM D4533/ D4533M ( 2015) St andar d Test Met hod f or Tr apezoi d Tear i ng St r engt h of Geot ext i l es

ASTM D4632/ D4632M ( 2015a) Gr ab Br eaki ng Load and El ongat i on of Geot ext i l es

ASTM D4759 ( 2011) Det er mi ni ng t he Speci f i cat i on Conf or mance of Geosynt het i cs

ASTM D4833/ D4833M ( 2007; E 2013; R 2013) I ndex Punct ur e Resi st ance of Geot ext i l es, Geomembr anes, and Rel at ed Pr oduct s

ASTM D6938 ( 2017) St andar d Test Met hod f or I n- Pl ace Densi t y and Wat er Cont ent of Soi l and Soi l - Aggr egat e by Nucl ear Met hods ( Shal l ow Dept h)

ASTM D698 ( 2012; E 2014; E 2015) Labor at or y Compact i on Char act er i st i cs of Soi l Usi ng St andar d Ef f or t ( 12, 400 f t - l bf / cu. f t .

( 600 kN- m/ cu. m. ) )

1. 2 DEFI NI TI ONS

1. 2. 1 Degr ee of Compact i on

Degr ee of compact i on i s expr essed as a per cent age of t he maxi mum densi t y obt ai ned by t he t est pr ocedur e pr esent ed i n ASTM D1557, f or gener al soi l t ypes, abbr evi at ed as per cent l abor at or y maxi mum densi t y.

1. 2. 2 Har d Mat er i al s

Weat her ed r ock, dense consol i dat ed deposi t s, or congl omer at e mat er i al s whi ch ar e not i ncl uded i n t he def i ni t i on of " r ock" but whi ch usual l y r equi r e t he use of heavy excavat i on equi pment , r i pper t eet h, or j ack hammer s f or r emoval .

1. 2. 3 Rock

Sol i d homogeneous i nt er l ocki ng cr yst al l i ne mat er i al wi t h f i r ml y cement ed, l ami nat ed, or f ol i at ed masses or congl omer at e deposi t s, nei t her of whi ch can be r emoved wi t hout syst emat i c dr i l l i ng and bl ast i ng, dr i l l i ng and t he use of expansi on j acks or f eat her wedges, or t he use of backhoe- mount ed pneumat i c hol e puncher s or r ock br eaker s; al so l ar ge boul der s, bur i ed masonr y, or concr et e ot her t han pavement exceedi ng 1/ 2 cubi c yar d i n vol ume. Removal of har d mat er i al wi l l not be consi der ed r ock excavat i on because of i nt er mi t t ent dr i l l i ng and bl ast i ng t hat i s per f or med mer el y t o i ncr ease pr oduct i on.

1. 3 SUBMI TTALS

Gover nment appr oval i s r equi r ed f or al l submi t t al s. . Submi t t he f ol l owi ng i n accor dance wi t h Sect i on 01 33 00 SUBMI TTAL PROCEDURES:

SD- 01 Pr econst r uct i on Submi t t al s

SECTI ON 31 23 00. 00 20 Page 2

Heal t h and Saf et y Pl an f or Wor k i n Oper abl e Uni t ( OU) Ar eas

Shor i ng and Sheet i ng Pl an

Dewat er i ng wor k pl an

Submi t 15 days pr i or t o st ar t i ng wor k.

SD- 03 Pr oduct Dat a

Fi l t er Fabr i c

SD- 06 Test Repor t s

Test i ng

Sel ect mat er i al t est

Densi t y t est s

Moi st ur e Cont ent Test s

Copi es of al l l abor at or y and f i el d t est r epor t s wi t hi n 24 hour s of t he compl et i on of t he t est .

1. 4 DELI VERY, STORAGE, AND HANDLI NG

Per f or m i n a manner t o pr event cont ami nat i on or segr egat i on of mat er i al s.

1. 5 CRI TERI A FOR BI DDI NG

Base bi ds on t he f ol l owi ng cr i t er i a:

a. Sur f ace el evat i ons ar e as i ndi cat ed.

b. Pi pes or ot her ar t i f i c i al obst r uct i ons, except t hose i ndi cat ed, wi l l not be encount er ed.

c. Gr ound wat er el evat i on i s 8 f eet bel ow exi st i ng sur f ace el evat i on.

d. Har d mat er i al s and r ock wi l l not be encount er ed.

e. Bor r ow mat er i al i n t he quant i t i es r equi r ed i s not avai l abl e on Gover nment pr oper t y.

f . Bl ast i ng wi l l not be per mi t t ed. Remove mat er i al i n an appr oved manner .

g. Cont ami nat ed soi l may be encount er ed at t he s i t e. Ref er t o t hi s sect i on f or di sposal r equi r ement s.

1. 6 REQUI REMENTS FOR OFF SI TE SOI L

Do not f ur ni sh or t r anspor t soi l s ont o MCAS Cher r y Poi nt or out l y i ng f i el ds when such act woul d v i ol at e t he Compr ehensi ve Envi r onment al Response Compensat i on and Li abi l i t y Act ( CERCLA) or t he Gener al St at ut es of Nor t h Car ol i na.

SECTI ON 31 23 00. 00 20 Page 3

The Cont r act or shal l pr ovi de document at i on cer t i f y i ng t hat al l soi l f ur ni shed under t he cont r act cont ai ns no pet r ol eum or hazar dous or t oxi c mat er i al s as st at ed i n DoD I nst r uct i on 4715. 6, whi ch i mpl ement s 10 U. S. C.

2692. Thi s document at i on shal l i ncl ude t he Soi l Aut hor i zat i on For m ( SAF) showi ng t he vol ume of soi l needed, anal yt i cal t est dat a t o suppor t t he envi r onment al condi t i on of t he soi l , and a copy of t he St at e- i ssued “ mi ni ng per mi t ” f or t he bor r ow pi t sour ce. The MCAS Cher r y Poi nt Envi r onment al Af f ai r s Depar t ment ( EAD) wi l l r evi ew t hese document s bef or e of f s i t e soi l i s consi der ed appr oved f or use.

The f ol l owi ng met hods shal l be used t o det er mi ne i f soi l meet s t he r equi r ement s f or of f s i t e soi l ( RFOSS) .

I f t he t ot al amount of soi l t o be br ought ont o MCAS Cher r y Poi nt f or a s i ngl e cont r act i s l ess t han 200 cubi c yar ds, t he Cont r act or shal l cer t i f y t he soi l meet s t he RFOSS by i nspect i ng f or “ appar ent cont ami nat i on” as det er mi ned by v i sual or ot her i ndi cat i ons of cont ami nat i on i ncl udi ng abnor mal or unnat ur al col or , chemi cal or pet r ol eum odor s, or sat ur at i on wi t h a chemi cal or pet r ol eum. I f t he soi l shows no appar ent cont ami nat i on, t he Cont r act or shal l pr ovi de t o EAD a si gned SAF cer t i f y i ng t he soi l cont ai ns no appar ent cont ami nat i on. Soi l showi ng appar ent cont ami nat i on shal l not be ut i l i zed aboar d MCAS Cher r y Poi nt or out l y i ng f i el ds.

I f t he t ot al amount of soi l t o be br ought aboar d MCAS Cher r y Poi nt f or a s i ngl e cont r act i s equal t o or gr eat er t han 200 cubi c yar ds, t he soi l shal l be anal yzed by a Nor t h Car ol i na cer t i f i ed l abor at or y. The l abor at or y must be cer t i f i ed by Nor t h Car ol i na i n t he speci f i c t est s t o be per f or med. Sampl i ng must be conduct ed by qual i f i ed per sonnel f ol l owi ng pr oper f i el d sampl i ng met hodol ogy and pr oper chai n- of - cust ody pr ot ocol must be f ol l owed. Ot her wi se, t he sampl i ng wi l l be consi der ed i nval i d.

Consul t wi t h t he sel ect ed l abor at or y about t he speci f i c sampl e handl i ng pr ocedur es r equi r ed by t he anal yt i cal met hods. Sampl e cont ai ner s, sampl e vol umes, and t i mef r ames di f f er dependi ng on t he anal yt i cal met hod.

Sampl i ng r equi r ement s ar e summar i zed bel ow and ar e f or a s i ngl e soi l sour ce onl y.

a. One r epr esent at i ve sampl e f or soi l vol umes of 200 cubi c yar ds t o 1, 000 cubi c yar ds needed.

b. For soi l vol umes gr eat er t han 1, 000 cubi c yar ds, one addi t i onal r epr esent at i ve sampl e i s r equi r ed f or each addi t i onal 2, 000 cubi c yar ds or por t i on t her eof .

A r epr esent at i ve sampl e i s achi eved by col l ect i ng mul t i pl e sampl es i n a def i ned ar ea ( e. g. soi l st ockpi l e or bor r ow pi t ) and di r ect i ng t he l abor at or y t o combi ne t hem i nt o a “ composi t e sampl e” f or anal ysi s. The composi t e or r epr esent at i ve sampl e i s i nt ended t o r epr esent t he soi l sour ce as a whol e.

Sampl es shal l be col l ect ed by qual i f i ed per sonnel f ol l owi ng pr oper f i el d sampl i ng met hodol ogy. For each r epr esent at i ve sampl e, 3 “ pr i mar y sampl es” f r om each of 2 soi l bor i ngs ( or excavat i on pi t s) shal l be obt ai ned f or a t ot al of 6 pr i mar y sampl es. The 3 pr i mar y sampl es col l ect ed f r om each bor i ng/ pi t shal l be obt ai ned at even i nt er val s t hr oughout t he soi l col umn ( i . e. upper , mi ddl e, l ower ) and pl aced i nt o i ndi v i dual sampl i ng cont ai ner s. Sampl es shal l not be combi ned i n t he f i el d. The 6 pr i mar y sampl es shal l be sent t o t he NC cer t i f i ed l abor at or y wher e t hey wi l l be

SECTI ON 31 23 00. 00 20 Page 4 combi ned i nt o one “ composi t e sampl e” f or anal ysi s.

Soi l sampl es shal l be anal yzed f or Gasol i ne Range Or gani cs ( GRO) , Di esel Range Or gani cs ( DRO) , Oi l and Gr ease ( O&G) , and ei ght Met al s ( Ar seni c;

Bar i um; Cadmi um; Chr omi um; Lead; Mer cur y; Sel eni um; and Si l ver ) . The l abor at or y met hod det ect i on l i mi t s must be set bel ow t he St at e act i on l evel s or t he t est i ng wi l l be consi der ed i nval i d. Al l uni t s ar e t o be r epor t ed i n mi l l i gr ams per k i l ogr ams ( mg/ kg) .

Soi l sampl es shoul d be anal yzed f or t he f ol l owi ng par amet er s:

a. Gasol i ne Range Or gani cs - use St andar d Met hod 5030

b. Di esel Range Or gani cs – use St andar d Met hod 5030

c. Oi l & Gr ease – use EPA Met hod 9071 wi t h a s i l i ca gel wash

d. Tot al Met al s – use EPA 6010 ( Ar seni c, Bar i um, Cadmi um, Chr omi um, Lead, Sel eni um, and Si l ver )

e. Tot al Met al s – use EPA 7471 ( Mer cur y onl y)

I f t est r esul t s ar e gr eat er t han t he al l owed det ect i on l i mi t s f or pet r ol eum const i t uent s ( GRO, DRO, O&G) or t he st andar ds f or t he ei ght met al s ( as pr ovi ded by t he EPA) , t he soi l f r om whi ch t he sampl e was t aken shal l not be appr oved f or use.

1. 7 CONTAMI NATED SOI LS

Sel ect s i t es ar e l ocat ed near or wi t hi n an ar ea wi t h a hi st or y of maj or POL or chemi cal spi l l s . Pr e- char act er i zat i on or soi l sampl i ng i s not r equi r ed pr i or t o excavat i on. Thi s i nf or mat i on i s pr ovi ded t o gi ve t he cont r act or ' s I ndust r i al Hygi ene Depar t ment f or i ncor por at i on i nt o t hei r Heal t h and Saf et y Pl an t o ensur e wor ker saf et y.

I f any soi l whi ch exhi bi t s an abnor mal or unnat ur al col or , a chemi cal or pet r ol eum odor , or i s sat ur at ed wi t h a chemi cal or pet r ol eum i s encount er ed dur i ng excavat i on, Cont r act or shal l i mmedi at el y st op wor k i n t hat ar ea, and t he Cont r act or shal l advi se t he Envi r onment al Af f ai r s Depar t ment ( EAD) of t he s i t uat i on so a cour se of act i on can be devel oped t o addr ess t he cont ami nat i on.

Al l excavat ed soi l may be r e- ut i l i zed as backf i l l at t he same l ocat i on f r om whi ch i t was r emoved unl ess pet r ol eum cont ami nat i on i s di scover ed.

I f pet r ol eum cont ami nat i on i s di scover ed, t he soi l shal l be segr egat ed by PI D ( >/ = 10 ppm or exhi bi t s st ai ni ng) , pr oper l y st ockpi l ed, t est ed, and di sposed. I f soi l i s st ockpi l ed, i t shal l be st ockpi l ed on pl ast i c, ber med, and cover ed i n accor dance wi t h NC DENR Gr oundwat er Sect i on Gui del i nes f or t he I nvest i gat i on and Remedi at i on of Soi l and Gr oundwat er , Vol . 1 dat ed Jul y 2000 ( Gui del i nes) , or pl aced i n a r ol l of f cont ai ner and cover ed wi t h pl ast i c.

Any excess soi l t hat cannot be r e- ut i l i zed as backf i l l at t he same l ocat i on f r om whi ch i t was r emoved shal l be di sposed at a Subt i t l e D l andf i l l ( e. g. ; Tuscar or a) as a mi ni mum wi t h t he under st andi ng t hat t he anal yt i cal t est i ng r esul t s shal l det er mi ne t he f i nal di sposal f aci l i t y .

Cont act or shal l pr ovi de suppor t i ng l abor at or y anal ysi s t o t he EAD f or r evi ew. The EAD shal l r evi ew and si gn t he wast e mani f est s/ bi l l of l adi ng f or t he soi l di sposal pr i or t o any of t hi s soi l l eavi ng t he Ai r St at i on.

The mani f est shal l al so cont ai n t he amount of soi l ( wei ght ) and suppor t i ng l abor at or y r esul t s f or EAD t o r evi ew. One composi t e sampl e shal l be t aken and anal yzed f or each 200 cubi c yar ds of t he st ockpi l e per DENR Gui del i nes i n or der t o det er mi ne t he pr oper met hod f or di sposal .

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Use of a Nor t h Car ol i na cer t i f i ed l abor at or y t o per f or m t he speci f i c soi l anal yses i s r equi r ed. The l abor at or y shal l be cer t i f i ed by Nor t h Car ol i na i n t he speci f i c t est s t o be per f or med. Cont r act or shal l consul t wi t h t he sel ect ed l abor at or y about t he speci f i c sampl e handl i ng pr ocedur es r equi r ed by t he anal yt i cal met hods. Sampl e cont ai ner s, vol umes, pr ocedur es, and pr eser vat i on var y among met hods. Sampl i ng shal l be conduct ed by qual i f i ed per sonnel and pr oper chai n- of - cust ody pr ot ocol shal l be f ol l owed. The st ockpi l e sampl e( s) shal l be anal yzed f or t he f ol l owi ng:

St d Met hod 5030 sampl e pr ep wi t h Modi f i ed 8015 ( CA GC- FI D Met hod) - Gasol i ne Range Or gani cs, St d Met hod 5030 and 3550 sampl e pr ep wi t h Modi f i ed 8015 - Di esel Range Or gani cs, EPA Met hod 9071 - Oi l & Gr ease, wi t h s i l i ca gel wash

Ful l TCLP

Al l di st ur bed ar eas shal l al so be capped t oppi ng t he excavat ed ar ea wi t h 12 i nches of compact ed, c l ean f i l l . Cappi ng i s r equi r ed t o pr event an i ncr eased exposur e r i sk f r om bot h sur f i c i al exposur e and cont ami nant l eachi ng. Ther ef or e, backf i l l ed soi l s shal l be compact ed t o mi ni mi ze i nf i l t r at i on of sur f ace wat er t hr ough t he soi l col umn.

See Sect i on 01 14 00 f or per mi t t i ng r equi r ement s when excavat i ng i nt o t he gr oundwat er t abl e i n an OU ar ea.

1. 8 CONTAMI NATED GROUNDWATER

I n cont ami nat ed ar eas, i f dewat er i ng i s r equi r ed dur i ng excavat i on, t he gr oundwat er shal l not be di schar ged t o t he gr ound sur f ace or st or m sewer .

The Cont r act i ng Of f i cer shal l make ar r angement s wi t h t he I WTP f or di sposal of cont ami nat ed gr oundwat er . A chi t shal l be obt ai ned f r om EAD ( Ti mot hy Lawr ence 466- 2754) pr i or t o sendi ng cont ami nat ed wat er t o t he I WTP.

See Sect i on 01 14 00 f or per mi t t i ng r equi r ement s when excavat i ng i nt o t he gr oundwat er t abl e i n a Land Use Cont r ol ( LUC) ar ea.

1. 9 QUALI TY ASSURANCE

1. 9. 1 Shor i ng and Sheet i ng Pl an

Submi t dr awi ngs and cal cul at i ons, cer t i f i ed by a r egi st er ed pr of essi onal engi neer , descr i bi ng t he met hods f or shor i ng and sheet i ng of excavat i ons.

Dr awi ngs shal l i ncl ude mat er i al s i zes and t ypes, ar r angement of member s, and t he sequence and met hod of i nst al l at i on and r emoval . Cal cul at i ons shal l i ncl ude dat a and r ef er ences used.

The Cont r act or i s r equi r ed t o hi r e a Pr of essi onal Geot echni cal Engi neer t o pr ovi de i nspect i on of excavat i ons and soi l / gr oundwat er condi t i ons t hr oughout const r uct i on. The Geot echni cal Engi neer shal l be r esponsi bl e f or ver i f y i ng al l owabl e soi l bear i ng pr essur es, and per f or mi ng pr e- const r uct i on and per i odi c s i t e v i s i t s t hr oughout const r uct i on t o assess si t e condi t i ons. The Geot echni cal Engi neer shal l updat e t he excavat i on, sheet i ng and dewat er i ng pl ans as const r uct i on pr ogr esses t o r ef l ect changi ng condi t i ons and shal l submi t an updat ed pl an i f necessar y. A wr i t t en r epor t shal l be submi t t ed, at l east mont hl y, SECTI ON 31 23 00. 00 20 Page 6 i nf or mi ng t he Cont r act or and Cont r act i ng Of f i cer of t he st at us of t he pl an and an account i ng of t he Cont r act or ' s adher ence t o t he pl an addr essi ng any pr esent or pot ent i al pr obl ems. The Geot echni cal Engi neer shal l be avai l abl e t o meet wi t h t he Cont r act i ng Of f i cer at any t i me t hr oughout t he cont r act dur at i on.

1. 9. 2 Dewat er i ng Wor k Pl an

Submi t pr ocedur es f or accompl i shi ng dewat er i ng wor k.

1. 9. 3 Ut i l i t i es

Movement of const r uct i on machi ner y and equi pment over pi pes and ut i l i t i es dur i ng const r uct i on shal l be at t he Cont r act or ' s r i sk. Per f or m wor k adj acent t o non- Gover nment ut i l i t i es as i ndi cat ed i n accor dance wi t h pr ocedur es out l i ned by ut i l i t y company. Excavat i on made wi t h power - dr i ven equi pment i s not per mi t t ed wi t hi n t wo f eet of known Gover nment - owned ut i l i t y or subsur f ace const r uct i on. For wor k i mmedi at el y adj acent t o or f or excavat i ons exposi ng a ut i l i t y or ot her bur i ed obst r uct i on, excavat e by hand. St ar t hand excavat i on on each si de of t he i ndi cat ed obst r uct i on and cont i nue unt i l t he obst r uct i on i s uncover ed or unt i l c l ear ance f or t he new gr ade i s assur ed. Suppor t uncover ed l i nes or ot her exi st i ng wor k af f ect ed by t he cont r act excavat i on unt i l appr oval f or backf i l l i s gr ant ed by t he Cont r act i ng Of f i cer . Repor t damage t o ut i l i t y l i nes or subsur f ace const r uct i on i mmedi at el y t o t he Cont r act i ng Of f i cer .

PART 2 PRODUCTS

2. 1 SOI L MATERI ALS

2. 1. 1 Sel ect Mat er i al

Pr ovi de mat er i al s c l assi f i ed as GW, GP, SW, SP, or by ASTM D2487 wher e i ndi cat ed. The l i qui d l i mi t of such mat er i al shal l not exceed 35 per cent when t est ed i n accor dance wi t h ASTM D4318. The pl ast i c i t y i ndex shal l not be gr eat er t han 12 per cent when t est ed i n accor dance wi t h ASTM D4318, and not mor e t han 35 per cent by wei ght shal l be f i ner t han No. 200 si eve when t est ed i n accor dance wi t h ASTM D1140.

2. 2 UTI LI TY BEDDI NG MATERI AL

Except as speci f i ed ot her wi se i n t he i ndi v i dual pi pi ng sect i on, pr ovi de beddi ng f or bur i ed pi pi ng i n accor dance wi t h AWWA C600, Type 4, except as speci f i ed her ei n. Backf i l l t o t op of pi pe shal l be compact ed t o 95 per cent of ASTM D698 maxi mum densi t y. Pr ovi de ASTM D2321 mat er i al s as f ol l ows:

a. Cl ass I : Angul ar , 0. 25 t o 1. 5 i nches, gr aded st one, i ncl udi ng a number of f i l l mat er i al s t hat have r egi onal s i gni f i cance such as cor al , s l ag, c i nder s, cr ushed st one, and cr ushed shel l s.

2. 3 BORROW

Obt ai n bor r ow mat er i al s r equi r ed i n excess of t hose f ur ni shed f r om excavat i ons f r om sour ces out si de of Gover nment pr oper t y, at Cont r act or ' s cost .

SECTI ON 31 23 00. 00 20 Page 7

2. 4 FI LTER FABRI C

Pr ovi de a per vi ous sheet of pol yest er , nyl on, gl ass or pol ypr opyl ene, f i l ament s woven, spun bonded, f used, or ot her wi se manuf act ur ed i nt o a nonr avel i ng f abr i c wi t h uni f or m t hi ckness and st r engt h. Fabr i c shal l have t he f ol l owi ng manuf act ur er cer t i f i ed mi ni mum aver age r ol l pr oper t i es as det er mi ned by ASTM D4759:

Cl ass A Cl ass B

a. Gr ab t ensi l e st r engt h ( ASTM D4632/ D4632M) machi ne and t r ansver sed di r ect i on mi n. 180 80 l bs.

b. Gr ab el ongat i on ( ASTM D4632/ D4632M) machi ne and t r ansver se di r ect i on mi n. 15 15 per cent

c. Punct ur e r esi st ance ( ASTM D4833/ D4833M) mi n. 80 25 l bs.

d. Mul l en bur st st r engt h ( ASTM D3786/ D3786M) mi n. 290 130 psi

e. Tr apezoi dal Tear ( ASTM D4533/ D4533M) mi n. 50 25 l bs.

2. 5 MATERI AL FOR RI P- RAP

Fi l t er f abr i c and r ock conf or mi ng t o t hese r equi r ement s f or const r uct i on i ndi cat ed.

2. 5. 1 Rock

Rock f r agment s suf f i c i ent l y dur abl e t o ensur e per manence i n t he st r uct ur e and t he envi r onment i n whi ch i t i s t o be used. Rock f r agment s shal l be f r ee f r om cr acks, seams, and ot her def ect s t hat woul d i ncr ease t he r i sk of det er i or at i on f r om nat ur al causes. The si ze of t he f r agment s shal l be such t hat no i ndi v i dual f r agment exceeds a wei ght of 150 pounds and t hat no mor e t han 10 per cent of t he mi xt ur e, by wei ght , consi st s of f r agment s wei ghi ng 2 pounds or l ess each. Speci f i c gr avi t y of t he r ock shal l be a mi ni mum of 2. 50. The i ncl usi on of mor e t han t r ace 1 per cent quant i t i es of di r t , sand, c l ay, and r ock f i nes wi l l not be per mi t t ed.

2. 6 BURI ED WARNI NG AND I DENTI FI CATI ON TAPE

Pol yet hyl ene pl ast i c and met al l i c cor e or met al l i c- f aced, aci d- and al kal i - r esi st ant , pol yet hyl ene pl ast i c war ni ng t ape manuf act ur ed speci f i cal l y f or war ni ng and i dent i f i cat i on of bur i ed ut i l i t y l i nes.

Pr ovi de t ape on r ol l s, 3 i nch mi ni mum wi dt h, col or coded as speci f i ed bel ow f or t he i nt ended ut i l i t y wi t h war ni ng and i dent i f i cat i on i mpr i nt ed i n bol d bl ack l et t er s cont i nuousl y over t he ent i r e t ape l engt h. War ni ng and i dent i f i cat i on t o r ead, " CAUTI ON, BURI ED ( i nt ended ser vi ce) LI NE BELOW" or s i mi l ar wor di ng. Col or and pr i nt i ng shal l be per manent , unaf f ect ed by moi st ur e or soi l .

SECTI ON 31 23 00. 00 20 Page 8

War ni ng Tape Col or Codes

Red: El ect r i c

Yel l ow: Gas, Oi l ; Danger ous Mat er i al s

Or ange: Tel ephone and Ot her Communi cat i ons

Bl ue: Pot abl e Wat er Syst ems

Gr een: Sewer Syst ems

Whi t e: St eam Syst ems

Gr ay: Compr essed Ai r

Pur pl e: Non Pot abl e, Recl ai med Wat er , I r r i gat i on and Sl ur r y l i nes

2. 6. 1 War ni ng Tape f or Met al l i c Pi pi ng

Aci d and al kal i - r esi st ant pol yet hyl ene pl ast i c t ape conf or mi ng t o t he wi dt h, col or , and pr i nt i ng r equi r ement s speci f i ed above. Mi ni mum t hi ckness of t ape shal l be 0. 003 i nch. Tape shal l have a mi ni mum st r engt h of 1500 psi l engt hwi se, and 1250 psi cr osswi se, wi t h a maxi mum 350 per cent el ongat i on.

2. 6. 2 Det ect abl e War ni ng Tape f or Non- Met al l i c Pi pi ng

Pol yet hyl ene pl ast i c t ape conf or mi ng t o t he wi dt h, col or , and pr i nt i ng r equi r ement s speci f i ed above. Mi ni mum t hi ckness of t he t ape shal l be

0. 004 i nch. Tape shal l have a mi ni mum st r engt h of 1500 psi l engt hwi se and 1250 psi cr osswi se. Tape shal l be manuf act ur ed wi t h i nt egr al wi r es, f oi l backi ng, or ot her means of enabl i ng det ect i on by a met al det ect or when t ape i s bur i ed up t o 3 f eet deep. Encase met al l i c el ement of t he t ape i n a pr ot ect i ve j acket or pr ovi de wi t h ot her means of cor r osi on pr ot ect i on.

2. 7 DETECTI ON WI RE FOR NON- METALLI C PI PI NG

Det ect i on wi r e shal l be i nsul at ed si ngl e st r and, sol i d copper wi t h a mi ni mum of 12 AWG.

PART 3 EXECUTI ON

3. 1 PROTECTI ON

3. 1. 1 Dr ai nage and Dewat er i ng

Pr ovi de f or t he col l ect i on and di sposal of sur f ace and subsur f ace wat er encount er ed dur i ng const r uct i on.

3. 1. 1. 1 Dr ai nage

See par agr aph 1. 7 f or Cont ami nat ed Soi l s.

So t hat const r uct i on oper at i ons pr ogr ess successf ul l y, compl et el y dr ai n const r uct i on s i t e dur i ng per i ods of const r uct i on t o keep soi l mat er i al s

SECTI ON 31 23 00. 00 20 Page 9 suf f i c i ent l y dr y. The Cont r act or shal l est abl i sh/ const r uct st or m dr ai nage f eat ur es ( ponds/ basi ns) at t he ear l i est st ages of s i t e devel opment , and t hr oughout const r uct i on gr ade t he const r uct i on ar ea t o pr ovi de posi t i ve sur f ace wat er r unof f away f r om t he const r uct i on act i v i t y and/ or pr ovi de t empor ar y di t ches, di kes, swal es, and ot her dr ai nage f eat ur es and equi pment as r equi r ed t o mai nt ai n dr y soi l s, pr event er osi on and under mi ni ng of f oundat i ons. When unsui t abl e wor ki ng pl at f or ms f or equi pment oper at i on and unsui t abl e soi l suppor t f or subsequent const r uct i on f eat ur es devel op, r emove unsui t abl e mat er i al and pr ovi de new soi l mat er i al as speci f i ed her ei n. I t i s t he r esponsi bi l i t y of t he Cont r act or t o assess t he soi l and gr ound wat er condi t i ons pr esent ed by t he pl ans and speci f i cat i ons and t o empl oy necessar y measur es t o per mi t const r uct i on t o pr oceed. Excavat ed sl opes and backf i l l sur f aces shal l be pr ot ect ed t o pr event er osi on and sl oughi ng. Excavat i on shal l be per f or med so t hat t he s i t e, t he ar ea i mmedi at el y sur r oundi ng t he si t e, and t he ar ea af f ect i ng oper at i ons at t he s i t e shal l be cont i nual l y and ef f ect i vel y dr ai ned.

3. 1. 1. 2 Dewat er i ng

See par agr aph 1. 8 f or Cont ami nat ed Gr oundwat er .

Gr oundwat er f l owi ng t owar d or i nt o excavat i ons shal l be cont r ol l ed t o pr event s l oughi ng of excavat i on s l opes and wal l s, boi l s, upl i f t and heave i n t he excavat i on and t o el i mi nat e i nt er f er ence wi t h or der l y pr ogr ess of const r uct i on. Fr ench dr ai ns, sumps, di t ches or t r enches wi l l not be per mi t t ed wi t hi n 3 f eet of t he f oundat i on of any st r uct ur e, except wi t h speci f i c wr i t t en appr oval , and af t er speci f i c cont r act ual pr ovi s i ons f or r est or at i on of t he f oundat i on ar ea have been made. Cont r ol measur es shal l be t aken by t he t i me t he excavat i on r eaches t he wat er l evel i n or der t o mai nt ai n t he i nt egr i t y of t he i n s i t u mat er i al . Whi l e t he excavat i on i s open, t he wat er l evel shal l be mai nt ai ned cont i nuousl y, at l east t wo f eet bel ow t he wor ki ng l evel .

Oper at e dewat er i ng syst em cont i nuousl y unt i l const r uct i on wor k bel ow exi st i ng wat er l evel s i s compl et e. Submi t per f or mance r ecor ds weekl y.

Measur e and r ecor d per f or mance of dewat er i ng syst em at same t i me each day by use of obser vat i on wel l s or pi ezomet er s i nst al l ed i n conj unct i on wi t h t he dewat er i ng syst em. Rel i eve hydr ost at i c head i n pr evi ous zones bel ow subgr ade el evat i on i n l ayer ed soi l s t o pr event upl i f t .

3. 1. 2 Under gr ound Ut i l i t i es

Locat i on of t he exi st i ng ut i l i t i es i ndi cat ed i s appr oxi mat e. The Cont r act or shal l physi cal l y ver i f y t he l ocat i on and el evat i on of t he exi st i ng ut i l i t i es i ndi cat ed pr i or t o st ar t i ng const r uct i on. The Cont r act or shal l scan t he const r uct i on s i t e wi t h el ect r omagnet i c and soni c equi pment and mar k t he sur f ace of t he gr ound wher e exi st i ng under gr ound ut i l i t i es ar e di scover ed.

3. 1. 3 Machi ner y and Equi pment

Movement of const r uct i on machi ner y and equi pment over pi pes dur i ng const r uct i on shal l be at t he Cont r act or ' s r i sk. Repai r , or r emove and pr ovi de new pi pe f or exi st i ng or newl y i nst al l ed pi pe t hat has been di spl aced or damaged.

SECTI ON 31 23 00. 00 20 Page 10

3. 2 SURFACE PREPARATI ON

3. 2. 1 Cl ear i ng and Gr ubbi ng

Unl ess i ndi cat ed ot her wi se, r emove t r ees, st umps, l ogs, shr ubs, br ush and veget at i on and ot her i t ems t hat woul d i nt er f er e wi t h const r uct i on oper at i ons wi t hi n t he c l ear i ng l i mi t s. Remove st umps ent i r el y. Gr ub out mat t ed r oot s and r oot s over 2 i nches i n di amet er t o at l east 18 i nches bel ow exi st i ng sur f ace.

3. 2. 2 St r i ppi ng

St r i p sui t abl e soi l f r om t he si t e wher e excavat i on or gr adi ng i s i ndi cat ed and st ockpi l e separ at el y f r om ot her excavat ed mat er i al . Mat er i al unsui t abl e f or use as t opsoi l shal l be wast ed. Locat e t opsoi l so t hat t he mat er i al can be used r eadi l y f or t he f i ni shed gr adi ng. Wher e suf f i c i ent exi st i ng t opsoi l conf or mi ng t o t he mat er i al r equi r ement s i s not avai l abl e on si t e, pr ovi de bor r ow mat er i al s sui t abl e f or use as t opsoi l . Pr ot ect t opsoi l and keep i n segr egat ed pi l es unt i l needed.

3. 2. 3 Unsui t abl e Mat er i al

Remove veget at i on, debr i s, decayed veget abl e mat t er , sod, mul ch, and r ubbi sh under neat h paved ar eas or concr et e s l abs.

3. 3 EXCAVATI ON

Excavat e t o cont our s, el evat i on, and di mensi ons i ndi cat ed. Reuse excavat ed mat er i al s t hat meet t he speci f i ed r equi r ement s f or t he mat er i al t ype r equi r ed at t he i nt ended l ocat i on. Keep excavat i ons f r ee f r om wat er .

Excavat e soi l di st ur bed or weakened by Cont r act or ' s oper at i ons, soi l s sof t ened or made unsui t abl e f or subsequent const r uct i on due t o exposur e t o weat her . Excavat i ons bel ow i ndi cat ed dept hs wi l l not be per mi t t ed except t o r emove unsat i sf act or y mat er i al . Unsat i sf act or y mat er i al encount er ed bel ow t he gr ades shown shal l be r emoved as di r ect ed. Ref i l l wi t h sel ect mat er i al and compact t o 100 per cent of ASTM D1557 maxi mum densi t y.

Unl ess speci f i ed ot her wi se, r ef i l l excavat i ons cut bel ow i ndi cat ed dept h wi t h sel ect mat er i al and compact t o 100 per cent of ASTM D1557 maxi mum densi t y. Sat i sf act or y mat er i al r emoved bel ow t he dept hs i ndi cat ed, wi t hout speci f i c di r ect i on of t he Cont r act i ng Of f i cer , shal l be r epl aced wi t h sat i sf act or y mat er i al s t o t he i ndi cat ed excavat i on gr ade; except as speci f i ed f or spr ead f oot i ngs. Det er mi nat i on of el evat i ons and measur ement s of appr oved over dept h excavat i on of unsat i sf act or y mat er i al bel ow gr ades i ndi cat ed shal l be done under t he di r ect i on of t he Cont r act i ng Of f i cer .

3. 3. 1 St r uct ur es Wi t h Spr ead Foot i ngs

Ensur e t hat f oot i ng subgr ades have been i nspect ed and appr oved by t he Cont r act i ng Of f i cer pr i or t o concr et e pl acement . Fi l l over excavat i ons wi t h concr et e dur i ng f oundat i on pl acement .

3. 3. 2 Pi pe Tr enches

Excavat e t o t he di mensi on i ndi cat ed. Gr ade bot t om of t r enches t o pr ovi de uni f or m suppor t f or each sect i on of pi pe af t er pi pe beddi ng pl acement .

Tamp i f necessar y t o pr ovi de a f i r m pi pe bed. Recesses shal l be excavat ed t o accommodat e bel l s and j oi nt s so t hat pi pe wi l l be uni f or ml y suppor t ed f or t he ent i r e l engt h. Rock, wher e encount er ed, shal l be excavat ed t o a

SECTI ON 31 23 00. 00 20 Page 11 dept h of at l east 6 i nches bel ow t he bot t om of t he pi pe.

3. 3. 3 Har d Mat er i al Excavat i on

Remove har d mat er i al t o el evat i ons i ndi cat ed i n a manner t hat wi l l l eave f oundat i on mat er i al i n an unshat t er ed and sol i d condi t i on. Roughen l evel sur f aces and cut s l oped sur f aces i nt o benches f or bond wi t h concr et e.

Pr ot ect shal e f r om condi t i ons causi ng decomposi t i on al ong j oi nt s or c l eavage pl anes and ot her t ypes of er osi on. Removal of har d mat er i al beyond l i nes and gr ades i ndi cat ed wi l l not be gr ounds f or a c l ai m f or addi t i onal payment unl ess pr evi ousl y aut hor i zed by t he Cont r act i ng Of f i cer . Excavat i on of t he mat er i al c l ai med as r ock shal l not be per f or med unt i l t he mat er i al has been cr oss sect i oned by t he Cont r act or and appr oved by t he Cont r act i ng Of f i cer . Common excavat i on shal l consi st of al l excavat i on not c l assi f i ed as r ock excavat i on.

3. 3. 4 Excavat ed Mat er i al s

Sat i sf act or y excavat ed mat er i al r equi r ed f or f i l l or backf i l l shal l be pl aced i n t he pr oper sect i on of t he per manent wor k r equi r ed or shal l be separ at el y st ockpi l ed i f i t cannot be r eadi l y pl aced. Sat i sf act or y mat er i al i n excess of t hat r equi r ed f or t he per manent wor k and al l unsat i sf act or y mat er i al shal l be di sposed of as speci f i ed i n Par agr aph

" DI SPOSI TI ON OF SURPLUS MATERI AL. "

3. 3. 5 St ockpi l e

Any soi l t hat i s excavat ed dur i ng const r uct i on t hat shows cont ami nat i on by v i s i bl e s i ght , smel l or pi d det ect i on shal l be segr egat ed and st ockpi l ed f or t est i ng pr i or t o r emoval f r om t he pr oj ect s i t e. Tempor ar y st ockpi l e shal l be const r uct ed and mai nt ai ned i n accor dance wi t h EOA, EPA, and NCDENR st andar ds and speci f i cat i on.

3. 3. 6 Soi l and Wat er Test i ng

The Cont r act or shal l t est al l soi l and wat er f or cont ami nant s i ndi cat ed pr i or t o r emoval f r om si t e. The Cont r act or shal l be r esponsi bl e f or al l l abor , mat er i al s, equi pment necessar y t o t est and cont r ol soi l and wat er on- si t e. Soi l and wat er t est i ng shal l be per f or med by a cer t i f i ed l abor at or y and wr i t t en r epor t s pr ovi ded t o t he Cont r act i ng Of f i cer .

a. St d. Met hod 5030 Sampl e Pr ep wi t h modi f i ed 8015 - gasol i ne r ange or gani cs

b. St d Met hod 5030 and 3550 Sampl e Pr ep wi t h modi f i ed 8015 - di esel r ange or gani cs

c. EPA Met hod 9071 - oi l & gr ease wi t h s i l i ca gel wash

d. Ful l TCLP

Al l cont ami nat ed soi l and wat er r emoved f r om si t e shal l be t r eat ed and/ or di sposed of at a NCDENR per mi t t ed s i t e.

Wat er det er mi ned by t est i ng t o be f r ee of cont ami nat i on shal l be r el eased f r om t he si t e i n accor dance wi t h NCDENR sedi ment and er osi on cont r ol r egul at i ons and per mi t s.

SECTI ON 31 23 00. 00 20 Page 12

3. 4 SUBGRADE PREPARATI ON

Unsat i sf act or y mat er i al i n sur f aces t o r ecei ve f i l l or i n excavat ed ar eas shal l be r emoved and r epl aced wi t h sat i sf act or y mat er i al s as di r ect ed by t he Cont r act i ng Of f i cer . The sur f ace shal l be scar i f i ed t o a dept h of 6 i nches bef or e t he f i l l i s st ar t ed. Sl oped sur f aces st eeper t han 1 ver t i cal t o 4 hor i zont al shal l be pl owed, st epped, benched, or br oken up so t hat t he f i l l mat er i al wi l l bond wi t h t he exi st i ng mat er i al . When subgr ades ar e l ess t han t he speci f i ed densi t y, t he gr ound sur f ace shal l be br oken up t o a mi ni mum dept h of 6 i nches, pul ver i zed, and compact ed t o t he speci f i ed densi t y. When t he subgr ade i s par t f i l l and par t excavat i on or nat ur al gr ound, t he excavat ed or nat ur al gr ound por t i on shal l be scar i f i ed t o a dept h of 12 i nches and compact ed as speci f i ed f or t he adj acent f i l l .

Mat er i al shal l not be pl aced on sur f aces t hat ar e muddy, f r ozen, or cont ai n f r ost . Compact i on shal l be accompl i shed by sheepsf oot r ol l er s, pneumat i c- t i r ed r ol l er s, st eel - wheel ed r ol l er s, or ot her appr oved equi pment wel l sui t ed t o t he soi l bei ng compact ed. Mat er i al shal l be moi st ened or aer at ed as necessar y speci f i ed compact i on wi t h t he equi pment used. Mi ni mum subgr ade densi t y shal l be as speci f i ed her ei n.

3. 4. 1 Pr oof Rol l i ng

Pr oof r ol l i ng shal l be done on an exposed subgr ade f r ee of sur f ace wat er ( wet condi t i ons r esul t i ng f r om r ai nf al l ) whi ch woul d pr omot e degr adat i on of an ot her wi se accept abl e subgr ade. Af t er st r i ppi ng, pr oof r ol l t he exi st i ng subgr ade of t he bui l di ng and paved ar eas wi t h s i x passes of a dump t r uck l oaded wi t h 6 cubi c met er s of soi l . Oper at e t he t r uck i n a syst emat i c manner t o ensur e t he number of passes over al l ar eas, and at speeds bet ween 2 1/ 2 t o 3 1/ 2 mi l es per hour . When pr oof r ol l i ng under bui l di ngs, t he bui l di ng subgr ade shal l be consi der ed t o ext end 5 f eet beyond t he bui l di ng l i nes, and one- hal f of t he passes made wi t h t he r ol l er shal l be i n a di r ect i on per pendi cul ar t o t he ot her passes. Not i f y t he Cont r act i ng Of f i cer a mi ni mum of 3 days pr i or t o pr oof r ol l i ng. Pr oof r ol l i ng shal l be per f or med i n t he pr esence of t he Cont r act i ng Of f i cer .

Rut t i ng or pumpi ng of mat er i al shal l be under cut as di r ect ed by t he Cont r act i ng Of f i cer .

3. 5 FI LLI NG AND BACKFI LLI NG

Fi l l and backf i l l t o cont our s, el evat i ons, and di mensi ons i ndi cat ed.

Compact each l i f t bef or e pl aci ng over l ayi ng l i f t .

3. 5. 1 Pl acement of Fl owabl e Cement Fi l l

Pump f l owabl e f i l l t o compl et el y f i l l ut i l i t y pi pes wi t h no voi ds.

3. 5. 2 Sel ect Mat er i al Pl acement

Pl ace i n 6 i nch l i f t s . Do not pl ace over wet or f r ozen ar eas. Backf i l l adj acent t o st r uct ur es shal l be pl aced as st r uct ur al el ement s ar e compl et ed and accept ed. Backf i l l agai nst concr et e onl y when appr oved.

Pl ace and compact mat er i al t o avoi d l oadi ng upon or agai nst st r uct ur e.

3. 5. 3 Tr ench Backf i l l i ng

Backf i l l as r api dl y as const r uct i on, t est i ng, and accept ance of wor k per mi t s. Pl ace and compact backf i l l under st r uct ur es and paved ar eas i n 6 i nch l i f t s t o t op of t r ench and i n 6 i nch l i f t s t o one f oot over pi pe out si de st r uct ur es and paved ar eas.

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3. 6 BORROW

Wher e sat i sf act or y mat er i al s ar e not avai l abl e i n suf f i c i ent quant i t y f r om r equi r ed excavat i ons, appr oved bor r ow mat er i al s shal l be obt ai ned as speci f i ed her ei n.

3. 7 BURI ED WARNI NG AND I DENTI FI CATI ON TAPE

Pr ovi de bur i ed ut i l i t y l i nes wi t h ut i l i t y i dent i f i cat i on t ape. Bur y t ape 12 i nches bel ow f i ni shed gr ade; under pavement s and sl abs, bur y t ape 6 i nches bel ow t op of subgr ade.

3. 8 BURI ED DETECTI ON WI RE

Bur y det ect i on wi r e di r ect l y above non- met al l i c pi pi ng at a di st ance not t o exceed 12 i nches above t he t op of pi pe. The wi r e shal l ext end cont i nuousl y and unbr oken, f r om manhol e t o manhol e. The ends of t he wi r e shal l t er mi nat e i nsi de t he manhol es at each end of t he pi pe, wi t h a mi ni mum of 3 f eet of wi r e, coi l ed, r emai ni ng accessi bl e i n each manhol e.

The wi r e shal l r emai n i nsul at ed over i t ' s ent i r e l engt h. The wi r e shal l ent er manhol es bet ween t he t op of t he cor bel and t he f r ame, and ext end up t hr ough t he chi mney seal bet ween t he f r ame and t he chi mney seal . For f or ce mai ns, t he wi r e shal l t er mi nat e i n t he val ve pi t at t he pump st at i on end of t he pi pe.

3. 9 COMPACTI ON

Det er mi ne i n- pl ace densi t y of exi st i ng subgr ade; i f r equi r ed densi t y exi st s, no compact i on of exi st i ng subgr ade wi l l be r equi r ed.

3. 9. 1 Gener al Si t e

Compact under neat h ar eas desi gnat ed f or veget at i on and ar eas out si de t he 10 f oot l i ne of t he paved ar ea or st r uct ur e t o 90 per cent of ASTM D1557.

3. 9. 2 St r uct ur es, Spr ead Foot i ngs, and Concr et e Sl abs

Compact t op 12 i nches of subgr ades t o 95 per cent of ASTM D1557. Compact sel ect mat er i al t o 95 per cent of ASTM D1557.

3. 9. 3 Adj acent Ar ea

Compact ar eas wi t hi n 5 f eet of st r uct ur es t o 90 per cent of ASTM D1557.

3. 9. 4 Paved Ar eas

Compact t op 12 i nches of subgr ades t o 95 per cent of ASTM D1557. Compact f i l l and backf i l l mat er i al s t o 95 per cent of ASTM D1557.

3. 10 PI PELI NE CASI NG UNDER PAVEMENT

Pr ovi de new smoot h wal l st eel pi pel i ne casi ng under exi st i ng pavement by t he bor i ng and j acki ng met hod of i nst al l at i on. Pr ovi de each new pi pel i ne casi ng, wher e i ndi cat ed and t o t he l engt hs and di mensi ons shown, compl et e and sui t abl e f or use wi t h t he new pi ped ut i l i t y as i ndi cat ed.

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3. 10. 1 Ear t hwor k f or Pi pel i ne Casi ngs

Pr ovi de excavat i on, sheet pi l i ng, shor i ng, dewat er i ng, and backf i l l i ng f or pi pel i ne casi ngs under t hi s sect i on.

3. 10. 2 St eel Cased Pi pel i nes

I nst al l pi pel i ne casi ng by dr y bor i ng and j acki ng met hod as f ol l ows:

3. 10. 2. 1 Hol e f or Pi pel i ne Casi ng

Mechani cal l y bor e hol es and case t hr ough t he soi l wi t h a cut t i ng head on a cont i nuous auger mount ed i nsi de t he casi ng pi pe. Wel d l engt hs of pi pe t oget her i n accor dance wi t h AWS D1. 1/ D1. 1M. Do not use wat er or ot her f l ui ds i n connect i on wi t h t he bor i ng oper at i on.

3. 10. 2. 2 Cl eani ng

Cl ean i nsi de of t he pi pel i ne casi ng of di r t , wel d spl at t er s, and ot her f or ei gn mat t er whi ch woul d i nt er f er e wi t h i nser t i on of t he pi ped ut i l i t i es by at t achi ng a pi pe cl eani ng pl ug t o t he bor i ng r i g and passi ng i t t hr ough t he pi pe.

3. 10. 2. 3 Pi ped Ut i l i t i es

Pr ovi de i n casi ng usi ng wood suppor t s adj ust ed t o obt ai ned gr ades and el evat i ons i ndi cat ed.

3. 10. 2. 4 End Seal s

Af t er i nst al l at i on of pi ped ut i l i t i es i n pi pel i ne casi ng, pr ovi de wat er t i ght end seal s at each end of pi pel i ne casi ng bet ween pi pel i ne casi ng and pi pi ng ut i l i t i es. Pr ovi de wat er t i ght segment ed el ast omer i c end seal s.

3. 11 RI P- RAP CONSTRUCTI ON

Const r uct r i p- r ap of Cl ass 2 ( I I ) st one ( NC DEQ Er osi on & Sedi ment Cont r ol Pl anni ng & Desi gn Manual Tabl e 6. 15b) on f i l t er f abr i c i n accor dance wi t h NCDOT Sect i on 876, & NCDEQ st andar ds, Sect i on 6. 15 i n t he ar eas i ndi cat ed.

Pr ovi de compl et ed r i p- r ap t hi ckness of not l ess t han 24 i nches per NCDOT St andar d Dr awi ng 876. 01.

3. 11. 1 Pr epar at i on

Tr i m and dr ess i ndi cat ed ar eas t o conf or m t o cr oss sect i ons, l i nes and gr ades shown wi t hi n a t ol er ance of 0. 1 f oot .

3. 11. 2 Beddi ng & Fabr i c Pl acement

Spr ead f i l t er f abr i c on pr epar ed subgr ade as i ndi cat ed. Fi ni sh beddi ng t o pr esent even sur f ace f r ee f r om mounds and wi ndr ows. Mechani cal l y key/ l ock t he l eadi ng edges of t he f abr i c at al l per i met er s i n accor dance wi t h f abr i c manuf act ur er ' s r equi r ement s.

3. 11. 3 St one Pl acement

Pl ace r ock f or r i p- r ap on pr epar ed beddi ng mat er i al t o pr oduce a wel l gr aded mass wi t h t he mi ni mum pr act i cabl e per cent age of voi ds i n

SECTI ON 31 23 00. 00 20 Page 15 conf or mance wi t h l i nes and gr ades i ndi cat ed. Di st r i but e l ar ger r ock f r agment s, wi t h di mensi ons ext endi ng t he f ul l dept h of t he r i p- r ap t hr oughout t he ent i r e mass and el i mi nat e " pocket s" of smal l r ock f r agment s. Rear r ange i ndi v i dual pi eces by mechani cal equi pment or by hand as necessar y t o obt ai n t he di st r i but i on of f r agment s i zes speci f i ed above.

3. 12 FI NI SH OPERATI ONS

3. 12. 1 Gr adi ng

Fi ni sh gr ades as i ndi cat ed wi t hi n one- t ent h of one f oot . Gr ade ar eas t o dr ai n wat er away f r om st r uct ur es. Mai nt ai n ar eas f r ee of t r ash and debr i s. For exi st i ng gr ades t hat wi l l r emai n but whi ch wer e di st ur bed by Cont r act or ' s oper at i ons, gr ade as di r ect ed.

3. 12. 2 Pr ot ect i on of Sur f aces

Pr ot ect newl y backf i l l ed, gr aded, and t opsoi l ed ar eas f r om t r af f i c , er osi on, and set t l ement s t hat may occur . Repai r or r eest abl i sh damaged gr ades, el evat i ons, or s l opes.

3. 13 DI SPOSI TI ON OF SURPLUS MATERI AL

Remove f r om Gover nment pr oper…