ML20009A147

Forwards Vibration Study for Dames & Moore Limerick Generating Station Project Primary Blast - West Face Pottsdum Trap Rock Sanatoga Quarry, Confirming 810602 Telcon Re Levels of Vibration from Quarry Blasting

ML20009A147
Person / Time
Site:	Limerick
Issue date:	06/11/1981
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	Romano F PENNSYLVANIA, COMMONWEALTH OF
References
NUDOCS 8107090025
Download: ML20009A147 (2)

Text

__ ___

1>

9' n

1

,A co Docket Nos. 50-352 inlN 11 19gi

d... y

• and 50-353 9

I i

JUN 151981 >

Mr. Frank Romano, Chainnan S

u.s.mr. %

Air and Water Pollution Patrol

?

61 Forest Avenue 7g '

Amb1er, Pennsylvania 19002 Co o

Dear Mr. Romano:

Reference is made to your telephone conversation of June 2,1981, with Don Calkins relative to our meeting here on June 18, 1981. During that conversation he indicated that there had been early concern about levels of vibration from quarry blasting. Enclosed is a report dated June 30, 1970, to document that statement.

In addition, the report from Philadel-phia Electric Company enclosed with my letter to you of June 2,1981, references other early studies of the blasting vibrations.

During the subject conversation you brought up a new concern about voids and workmanship in concrete work.

I believe that topic can be discussed best in a separate meeting with the NRC Senior Residence Inspector, Mr. Jacque Durr, at Limerick, rather than our meeting here. Mr. Calkins will request Mr. Durr to call you relative to this subject when he returns from travel on June 15, 1981.

We wish to repeat our offer to you to add items of your choice to the agenda for the June 18th meeting. Please give as much time as possible in the event that we need to line up additional members of the staff here to meet with you.

Distribution Docket TERA (16)

NRC /PDR NSIC L/PDR NIC LB2 IE (3)

DGEisenhut/RPurple RTedesco MService A. Schwencer, Chief Licensing Branch No. 2 ASchwencer DCalkins Division of Licensing

Enclosure:

As stated cc:

See next page C107090025 010611 1

PDR ADOCK 05000352 i A

PDR J,,

.b

.......Dg,a1y, ins:sp ASchwencer...

" *^"'>

o rt) 6/// /81.

..6/

/81

.l.

Nachosu ais sio soinacu c24o OFFICIAL RECORD COPY

' e ma en

y

\\

Mr. Edward G. Bauer, Jr.

Vice President & General Counsel Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvania 19101 cc: Troy B. Conner, Jr., Esq.

Mr. Vincent Boyer Conner, Moore & Corber Senior Vice President 1747 Pennsylvania Avenue, N. W.

Nuclear Operations Washington, D. C.

20006 Philadelphia Electric Company 2301 Market Street Deputy Attorney General Philadelphia, Pennsylvania 19101 Room 512, Main Capitol Building Harrisburg, Pennsylvania 17120 Karl Abraham Public Affairs Officer Mr. Robert W. Adler Region I, OIE Assistant' Attorney General U. S. Nuclear Regulatory Commission Bureau of Regulatory Counsel 631 Park Avenue 505 Executive House King of Prussia, PA 19806 P. O. Box 2357 Harrisburg, Pennsylvania 17120 Allan Kanner, Esq.

1622 Locust Street Honora.ble Lawrence Coughlin*

Philadelphia, Pennsylvania 19103 House of Representatives Congress of the United States Ms. Phyllis Zitzer Washington, D. C.

20515 Limerick Ectiogy Action P. O. Box 761 l'464 Roger B. Reynolds, Jr., Esq.

Pottstown, Pennsylvania 9

324 Swede Street Norristown, Pennsylvania 19401 Lawrence Sager,' Esq.

Sager & Sager Associates 45 High Street Pottstown, Pennsylvania 19464 Joseph A. Smyth Assistant County Solicitor County of Montgomery Courthouse Norristown, Pennsylvshia 19404 Eugene J. Bradley Philadelphia Electric Company Associate General Counsel 2301 Market Street Philadelphia, Pennsylvania 19101 Mr. Jacque Durr Resident Reactor Inspector U. S. Nuclear Regulatory Commission P. O. Box 47 L

Sanatoga, Pennsylvania 19464 h

s

s. A'.. '.'.y*

..v 'N.... W. %

9 'qfffYh'

'Y.

,.., * '.

{5 * l Q-

'g*,.,?.'

.ij ; p;

., h., ; 2..

r..a f..

2,.q. q't..1 +o.v.q.'.m ->,A.Mm p. -.

~s,.s

-..n p

y..

w:y,

).

,g y

. ~

[5 p,.... o._.

,t

-. A'..,.. :

.y

1. .. EN GIN EERS INCO RPORATED m-."--t. -

4 s :,.

4w

> ;w

. '.M..m. I' 'I.h. i,..;:s.k. J,...~.s.c., "

. t.:. %:d ?..C % :e *t, >

. r cr e.y

' ;*? ~ -

~..

r.';;W.7'ffM %.:.nek;.N"S.,s.'d* \\.W

a t p **

r '

s h

M' 'Q..

W s " '.p;p.y. :.,y~M.

~v,1 -

-i :: y ;... t s::. da.k=r. -:..

s

'.s

=*

.. ?,' ".A, y'W.3.y,.e x yk'-G.e t."

tm y**

./p-i T

y.,:.

.,- t' *.t

t.*?

h d

4 ;". w:.g;.J re.p'/r%M '.:. '.,,,,,J,l* :

J...c,an 4.:

....: <;, *F[ e.:sey, :g. %UN I

/'r ?.

..k.'y*;/

.,1

• y 7.s.,.st.,%u7$i,.&'._. w G.A

). -

.. r*

(* e.. s%...,!.;........Ty

. t. m.

w i,,t, "..

i t g* y l.~e w..s

~w c:-

..s 9..l m,.;..9 1 v.r.

3 p:

.r

.n..s-r..

.%. s.

r D

dY$

!sY.Nq.e,4 r n

• 2 w

n..,.mu

v... s.. ~ pa.v

• p.:n.:.

H,.

..s 4,h<t h.'.=.'.M:y.w.yh.ng@r.s~e.r.~y&c.y&,.v.

g... y&x.* wk. iY.% :.,

p 2;2di

V w

,w z.;

'. 1.. s,... m. L<....v,.., <; :..;. '>o".

1:e~.:.

.-. v

%,m,,

.e,,

- +.+,

g. ;: *4 W,.,.,.. c. %,T. a,.

W.1,l4,~# ~,

s

.M, 'W,, Qh...

u..?

. 4 lJ;L c s

w..

f*

g.>.

n.f.:. ?y

?

s*:.,. w,,;;

,s

......., - x..,. s..r.:

- :: -..~

w

L,y..

. e iD. v,s r.m. e..ob).-.-

,.o

g +.

3-

.ip

. s{: :.,.w, s*,.'r

,.. :.,... e

'5N....,.....u.iMfdW iMi@s..

? '-k N')XT..;.h.,n,.EMdMh;'

'MY Dames & 14oore

..?. W ' P. '

100 Church Street 4

-l'. O..' V.-c,; G W..

4.x.

eM.

m ~.

flew York, llew York 10007

("

.. ; o.,,

.,.. x..;.

2 t.

g.. e s.... <-.

c

. u.w

. ?< : Qi.,;.. M G g.C 5..

Attention: idr. Tom Tully

.J:

Y f.> -

~-.:

n.,

.;r,:.. w....

.:.. $. 4n?:-u.L.4.,. -

v.

... 4..,9.V June 30, 1970

?.c.

..2

...t:,.,....,......8

...y..m.......

'.. :G. #:...... y....#A.t,%

VIBRATIO;l STUDY FOR DAP.ES & Il00RE

(.,,.,.,.-

..ZW/.Ei. ?.fjy:,.'u Limerick Generating Station Project

.'.-:: ~.0Fr'....y.J.-6.i.i?

Primary Blast - West Fcce

-i d M O f i. % f'3..;.3.-1

,'cN'R Pottstown Trap Rock U.K..l.i

..:.'i: u34..:W. :

Sanatoga Quarry 2.:'c'y,.gy+p,;p4.j."Ac June 24, 1970

. ~

2

e..-..:..r.

.a. m,.e.,?..w. v..,o..

. s.-

. ;;..,n

,.....g... V.-.

., *.... o.h

..,1 8

W g' d

....L.. %. '. G.... w &n.-:G.iC.,'CX b;...

U -..'g. 4.'v.

r.;3.,.y;....

2ix

.' e -..... -

..r..-

.,..c..,....,.,.

e.

n.....

,...e.~

....s.

........,a.,-

..r......;.: y.m. ;,...

.: e.

.n. ~.........,.

.,.u...

....,...i

. n

.....s..

..r.. y,s :

., e.,y.n ap

_ g==

..4

.. ~ y.c. v. :

s,..[.,..,<

m

.. v... :..n.

COPY NUMBER 2 OF 4

v-.

. f ., ',', 5

... ~

h.,..

' n.: n.%...,

s c1elo 3

?73

~

I..,

o w: yA:

r..

.~.'

1

...... ~...,.

c.

g d.

.M

e Hazleton, Penna.

June 30, 1970 VIBRATION STUDY FOR DAMES & MOORE Pottstown Trap Rock - Sanatoga Quarry Primary Blast - West Face June 24, 1970 PURPOSE The purpose Bf this study was to measure the vibration effects from the primary blast on June 24, 1970 at the above named operation ar.d to determine their capacity to cause structural damage and to certify confomance to the Pennsylvania State Law.

THE BLAST This blast consisted of 14 vertical holes, 61s inches in diameter, drilled to

~

an average depth of 36 to 59 feet. The spacing and burden of the holes was.15 x 20 feet with an average of 12 feet of stemming material confining the charge in each hole.

The total load of 6531 pounds of Dupont Powde ' Company's P.DP-1 Primers, Pourvex Extra,.ind ANF0 "P" explosives was detonated in 14 separate 1.

, firing periods by means of Millisecond Electric Delay Blasting Caps #1 thru #14..'

. The maximum amount of explosives per delay period was 629 pounds.

Time of detonationsas 11:03 A.M.

l 1

h

..I d

b.

j

.c

.g b.

gune 30, 1970

)?EATHER CONDITIONS 1.

Type of' day

- Cicar 2.

Wind direction

- From the Southwest 3.

Temperature

- Approximately 78 F 0

SEISMOGRAPl! STATIONS For registra*. ion of the vibration effects from the subject blast t wo Vibra-l.og 3-Component Seis'mographs were employed.

_ Station #1:

Velocity Seismograph #178 (0.2 Range) was placed on the ground out 100 feet west southwest of Stack #A-20, approximately 250 fe the bl'ast.

Station #2:

Velocity Seismograph #151 (1.0 P.ange) was placed on the gro Limerick ~ Generating Station Site at Coordinate 3780 east and 6

.m nor,th.

approximately. 2800 feet south southeast of the blast.

~

^7 O

.e e

g e

e.

e G

(

e,e em

• en **-

' TliE SEISMOGRAPH RECORD The seismograph record represents a photograph of the velocity of vibr.4tions of the surface on which the instrument is sitting, at the recording location, in the form of 3 lines. The bottom line (longitudinal) represents horizontal velocity on a line joining the blast and the recording location; the top line-(transverse) represents velocity at right angles to this; and the middle line represents vertical velocity. Deviations of these lines from their positions of rest imount to the velocity of the ground magnified by an instrument factor depending on the range used for the seismograph test. In this case the range was set at 0.2 and 1.0 and the velocities were obtained by measuring the deviations of the traces in inches and dividing by the proper c.:!ibration factor.

Vertical lines on the record indicate the passage of time in 0.02 seconds, with every second being indicated by an accent mark.

RESULTS Recent itudies b> the United, States Bureau of Mines and other Authorities in the fic!d of blast vibrations and th'elt cifects on structures have resulted in a new criteria based on veloc_ity in inches per second. B61ow is a table of standards based on a velocity criteria.

VELOCITY PROBABLE DEGREE OF DAMAGE Below 2.0 inches per secend

...... Recommended safe vibration level.

Above 4.0 inches per second Threshold - very minor perceptible damage; plaster cracki, etc.

Above' 5.5 inches per second

...... Minor - no apparent weakening of the

' structure; glass, plaster, masonry damage.

~

Above 7.5 inches per second

... Major - serious structural failure through

~ ~ ~

cracking, distortion or shifting.

The above table is based on the Ma:,imum Velocity on any one component of an instrument measuring motion in three mutually perpendicular planes e

9 a

g-

Dames & Moore

. June 30,1970 BESULTS COMTitiUED The Commonwealth of Pennsylvania Law states that in blasting operations the

" Peak Particle Velocity" of the ground shall not exceed 2.0 inches per second l

in any one of three mutually perpendicular planes, in the vertical and horizontal directiohs, at the immediate location of any dwelling house, public building, school, church, comercial or institutional building.

Tabulated below are the measurements resulting from this blast.

SEISMOGRAPH tlAXIMutF NO. &

COMPONENT VELOCITY LOCATION (in/sec)

1. 178 Transverse l'.60

^

Quarry Vertical 1.50

• ~

Location Longitudinal 1.90 p151 Transverse 0.03 Project Vertical-0.02~

Site Lonoitudinal 0.02 Note:

The safety of the recorded vibration

- - effects is further substantiated by the v:New Jersey and Massachusetts Blasting Codes.

CONCLUSI0tlS According to all recognized damage indices, the ' ecorded vibration effects r

from the subject blast were below that necessary to cause structural damage to even old pre-stressed plaster, normally the weakest.natarial of construction, at the seismograph stations, in the imme;fi"a vicinity of the stations, or beyond the seismograph stations in,the same general direction and also conformed to the',

i

' Pennsylvania State Law governing blast vibrations.

Respectfully submitted, VIBRA-TECH ENGINEERS, INC.

V

'JjhnJ.#jesetar Field Engineer N N-s ',

l Anthony J. Petro, P. E.

President i

-7

-~-

' Cien tCd W6....?..k,00.N,........................ Ope ra tion M7dN.l.@....g 5

QOlfA/G'1/f..h.Thi0N f

Uch tuath)

~

N....... N...O...............~[.

...C...W...d......

,M O.... QL,'[......h..d...f.J..d..l..o..]^()..h..

Spcc fie nIast Locatton..

i i

Blast No.........-~........ D a t e......... 2....L}.. 70........ y..... Time of Btast....U.':C 3..

Vertical It t s tal IIoles........b........ Ho!e Dia meter....h. ~2..... Average Depth.b..10..k.9..

No of (cross out one) g Average Subgrade Dritting............h-.

Hole Spacings....! 5 '.......... B u r d e n s.....

'r-O '

e Average Sternming to Top Charge....k.

.... Type and Dclay Nos. Used.d.h...EM 10 59,9. _,_._

D e eking In fo rmation (if at y)....~....................... ~...~...~...

~.-~.~

Tetal Weight of Explosives.h.fQ.5..!......

Lbs.

Averaq Explosives lead Er Hole....b'3.k.....

Lbs.

Meke and Type of ExplosivesD.h.DN.I..b.U.G.M......

.@.b...).9...*E.

A.c....h....'.,.?.' u.... s..o....t wop. i. %..f..m. s to.. - -..-- e '..c. ce............-

E z> e r Maximu m Amenat of Explosiyes Per Firing Period.

............h E.h.....................-..---

.=

Lbs.

If Supplemen:ary Holes, Snake Holes, etc., were used give information as above.

....c.:

Weather and Sky Conditions..b.6.8.h......

-.... Wind irom the....

Temperature..A..,,c.c..a... y. W. -

Instrument Location......... ~...-...............w...

_E... T....%......M....@......)..S E.........e4..

..v.....i.u.... 2. &.5 4......z.

o.............- - N.v~

a. i =.r..c..o T

.. ~....,..................

Instrument Located 3pproximately...DN.. Feet. --.

4.

N.b.l..........

............from t h e Blas t (Direction)

Rematks if Elast produeid any unustal efieets

- _..... ~........

.............................p.

SIismogrnph No.....$.N..... E.;.'~5...... Na...O.:.h..... Operated byMr...

$N,. $.............. _

- -... ~...................... - -

~

k J 24-7o ildlllidll h f bl ) l!!!!IJJJMlj lljjlll Ulijlllj lilj- --- ~.. llL ll l I l 'll '~ ISO lj-

\\

. uj t

iv.xJ "., a..

, l g" /,1.$ '

m-l

,,M'.03dM.

l)1 l, $

I

],

t i

I i

u i

i, i

hf hh. h k, [ l'3b

• T #'~~~

l f

~~~ ~~' ' " \\' 6 D

~~~

~j I

!Uf I

l l

I i

,s 0

u._: 3 i l..t.n'Pl...s L

I

.i di

i. -

l s.

l 1u q

n. -

A..,is--

in/, li l..h l n'l l fi l i N i l i l l l l l fl~i l l i l l i l i l l l i,l il l l i l l l l l l i l l l l l.90 11111111111101

/

'"'" c 1

l I

/

.fi..t s

0.2 RANGF b'IB A-c.

H E]GINEERS, INC.

..l..

by.. -

JM..........

m ce pro 6!(..

.t.

.Use reverse si.le for rough sketches o r.. i s

- Aot if indicated) p H

a-LD

~~'--~'~^~~'^'n.a..u.a...:=

~ ~ ~-' " ""'"

y$

h Yk J 'Yl'..#I

^

~

_.,.n a

t, L.n.:21 AW bc.ISMQGNAPHIC REPORT

, dieatD.dM C6....

O O.U.-

Ope ra t to n.l.'RM.I.MS.... ff)EM%T;//.2...5.T.4Tio^l

@$5g cmtmtw

~

.s.M...D. '..!.6,],,1hlc,g,g,],@,p,,29,gf.,,,$,4,g,gJ,q,,,h,qj Speeific Blast toeation..

Date.... 6... 4..20........,...... nme of Bia,t. lt:ns...L.t.1..

B u s t xo...............................

,f3g Holes.....b........

Hole Dlame1er......b.",L.u..........Average Depth.$..10. h.(

No.cf 3

(cross out one)

\\

i-I Average Subgrade Drilling............

Hole Spacings....... l b Burdens EO Average Stemming to Top Charge......l.b.... Type and Delay Nos. Used.M.h...K.E..To 5.ss.

Deeking Information (if any)........

Tctal Weight of Explosi.ves h.N..k.........Lbs.

Avera Explosives Load p :. Hole....b.l..E..

...Lbs.

_Ac......"., P. p%..... plosivesDh.D.N..*..b.US.V.6'X......

.@.b.)S..h.'E.

. -.. ~.

Mik and Ty e oi Ex o..

,3 M..e. s.

P...o o.

.s. e.....

.. w..

Maximum Amount of Explosives Pcr Firing Period......'h.E.O..

Lbs.

If Supplementary Hotes, Snake Holes. etc., were used give information as above.

-~

Westher and ky Coaditicns 4.h.

Wind ftom the.. h.:.:

Temperature....,0,Q,@ 3.

Instrumen: Lccation O.f). MounB. DJ.h".2 e.l..M.d.?.K. b.U..M.E.P.l.j M..}.O...A.3...S.. IR...... ' T....

O...G....B....p..J..d..'..i.$3....~./C".O....L...A...s.T... 9.. 6.. 6...C.o...C.....zT Instrument Located Approximately...h.9.O,,,$,peeg

5. 3. E.

from.the Blast

.c;

,, f

f. /=, ~/

(Direction) s C's L Remark 5 if Blast produced any unusual efEeets....

. 1..).* M Operated by.....l. @M.......

Seismograph No.}.6.l......

,,,,f _24-70 l

{ T-O,Q3 in/src

_ L....._.._ e

- ~

4 s:1-7 ----

H dl:'i:.!!Pliil!:!!!!l0H:ll!!!!!!il!!!fII!!!!

fl'.03kN.!!

.U!'*ill!!

Il!!'

ii !!

HHil!j!!!i:!

i!!'.ilii!!m,

!!I I

ii!!!!IU o.

m.

n...i

• - 0.o r

'~'"= "~ ~

.. N..

i W l.-

l-i...

i

.l L s' YlT ;.. i.....T.T..T."77TiY.W.W.'t.-To... i.......T..T.T.D

' 01 '"* "'M - * *'A'i manor I

~

'IB A-KrI E{GINEERS. INC.

by..

14'.d...,.i.

l (Use reverse side for rough sketches o.

w te profd shot il iMicatcd) 4.is 1

1

=

s

't Docket Nos. 50-352 iJUN 1 i 19a; and 50-353 Mr. Frank Romano, Chairman Air and Water Pollution Patrol 61 Forest Avenue Ambler, Pennsylvania 19002

Dear Mr. Romano:

Reference is made to your telephone conversation of June 2,1981, with Don Calkins relative to our meeting here on June 18, 1981. During that conversation he indicated that there had been early concern about levels of vibration from quarry blasting. Enclosed is a report dated June 30, 1970, to document that statement.

In addition, the report fmm Philadel-phia Electric Company enclosed with my letter to you of June 2,1981, references other early studies of the blasting vibrations.

During the subject conversation you brought up a new concern about voids and workmanship in concrete work.

I believe that topic can be discussed best in a separate meeting with the NRC Senior Residence Inspector, Mr. Jacque Durr, at Limerick, rather than our meeting here. fir. Calkins will request Mr. Durr to call you relative to this subject when he returns from travel on June 15, 1981.

We wish to repeat our offer to you to add items of your choice to the agenda for the June 18th meeting. Please give as much time as possible in the event that we need to line up additional menters of the staff here to meet with you.

Distribution bcc:

Sincerely, Docket TERA ACRS(16)

NRC /PDR NSIC f

L/PDR NIC LB2 IE (3) t DGEisenhut/RPurple I

RTedesco MService A. Schwencer, Chief I

ASchwencer Licensing Branch No. 2 DCalkins Division of Licensing

Enclosure:

As stated l

Cc:

See next page

\\b, LB2

., er y 0,. j LB2j'/

...."., f f@ {cy }.

>.6/o/81 l 6} /81.

j

^

s:

5 ' ," O j

l

}

3

&cm22 e a: s.:...:u CFFICIAL RECORD CCPY

^<-

s Mr. Edward G. Bauer, Jr.

Vice President & General Counsel Philadelphia Electric Comp:ay 2301 Market Street Philadelphia, Pennsylvania 19101 Vincent Boyer Mr.ior Vice President cc: Troy B. Conner, Jr., Esq.

Sen Conner, Moore & Corber 1747 Pennsylvania Avenue, N. W.

Nuclear Operations Washington, D. C.

20006 Philadelphia Electric Company 2301 Market Street Deputy Attorney General Philadelphia, Pennsylvania 19101 Room 512, Main Capitol Building Harrisburg, Pennsylvania 17120 Karl Abraham Public Affairs Officer Mr. Robert W. Adler Region I, OIE Assistant

• Attorney General U. S. Nuclear Regulatory Commission Bursau of Regulatory Counsel 631 Park Avenue SOS Executive House King of Prussia, PA 19806 P. O. Box 2357 Harrisburg, Pennsylvania 17120 Allan Kanner, Esq.

1622 Locust Street Honorable Lawrence Coughlin*

Philadelphia, Pennsylvania 19103 House of Representatives Congress of the United S+ates Ms. Phyllis Zitzer Washington, D. C.

20!!!

Limerick Ecology Action P. O. Box 761

~

Roger B. Reynolds, Jr., Esq.

Pottstown, Pennsylvania l9464 324 Swede Street Norristown, Pennsylvania 19401 Lawrence Sager,' Esq.

Sager & Sager Associates

}

45 High Street Pottstown, Pennsylvania 19464 j

Joseph A. Smyth Assistant County Solicitor' County of Montgomery Courthouse Norristown, Pennsylvihia 19404 Eugene J. Bradley Philadelphia Electric Company Associate General Counsel 2301 Market Street Philadelphia, Pennsylvania 19101 Mr. Jacque Durr Resident Reactor Inspector U. S. Nuclear Regulatory Commission P. O. Box 47 i

Sanatoga, Pennsylvania 19464 i

(

t

k.' *. [ '. $** N../.*(T. '"...,t. $..*.h.p[N...'.b

. hN#

a

..,. :.%...v*,p

a. p..

.% ?* **,.* *.A'** = $'. f b e7. ~ %

is c-

. ~,

< x

g. r...

<\\'Q;;.[O L '.

q

• ~. * %. :,..-,.,5..9. J.. _

. '..w.

e pg,.4 *.

't

..-s

.. F F. p.: r,. E.. ENGIN EERS INCO RPORATED

..._._.__.,_s_..s.

.,.y or=i.m -

--e_

-r

--,__.,,.T..

I.S..s. @.. 3.. w.i.D.. S f,..;f y N.g.,M

d..';..

A

,r**

' t.:..e

.. w co... *:.~...~ ~

• t-

'.a y.*8

'W.

-e i.V'Vj'.:@,'.T.=t:;h,'*iat.W.%.%

-2 :%.

.,a.g :.iw-7.) a.m:.&:n>. %'.;'.(J

'4'.*

~.

ri

<: ;1 g

ez ~

.* *' ?'{,;.QC t **t-t s% ** { i.;.?~-'

• ji m.-

~' 4 t

i fd. W.*:y.-A

• S.if.l.f. '.L.M..W ~~;

's:l.k% M

~ ~ -

1...

-... ' ;n. 4 s y r.

s

• .5.#. 4.j ;;i,*t,gJ7 '* A '. s e 'e*n i'*.:

.v:v a N a4 sg

.f.

., -m.. e.. r 2,,f,:.4" g ..'*.'

hf.

V-

.. n...r... :. -

.u.

.A,..-

~

. h g.7%..e..?'*y.6'

-w-

)+.4..,. %.#,fCll% v s %.

'r. <.y ;.?L.q :,, * '. %. #.,e

~~

'2~....w......

s.

s.w

~%gp:yl%,.:.

c',?_,.'... s.j*nj:%". cv a

%%.l. b

~;

- -4:

> C

.a

.. 2 n :.'"J Q.

L *gK -1. f {.q

.-. 2.;.*ied..',,t.;.;M...'.l.

7,:

3

%. "Qf.4?v

• .I'

. d-c,ij M.%

.v N

- 1.,,.

4

.:d:.

w,...

t.

t l" *f.,' '.'.s' c'*

I4.

• r A

• +,.'.f.,

f.'.,.J. -.e.~ c*. r%.r. at.,f. &,,

.=

,4

&..a s."..

1 *t; -v.,. r.c.

yW.. I'

s. :.

. &..*.,.". e.T p-g-.

y

.? -

...a

. ~

..- s... 2

-r.

y rif.*2 :4 ru e, W,,.r'

,e. t '.

V...

t, -

n, J.:rS1..

.*.C y

.a.:. n. t u..v.,,.

f w..~m9. *.-.:

e..

w-@ g.

ggm,5 g poc7 s.

..l c..M.%.., m.a:..p. <.r.~

%g.,. f'..Q,Y..

'A

,. y

. :y

.;,n.<.RM p..

7 100 Church Street

.s.H

)

., F. <..,9., :;.: U.W.

.g' flew York, flew York 10007 P

c* o.

n...,...

3.

s Attention: Mr. Tom Tully

?

..m

(<. l-l. M.. 3.':s ;;. ' E; ;q.;

c

,r

--. ;&m 0 T.'.l;~. '..Yl s S. *,..:.%... ~ ;

~

--4

.,.. ~... ?. '.?.,m. '. ",,.iW.,

June 30, 1970

r..l.M......;,..

~.;......

..(rp., ti.'.'.p.,..me,.,..4VISRATI0il STUDY FOR DAMES & i4 CORE s

.a

..s...

.l.il %.

..... ' /y:::.'.,

Limerick Generating Station Project 1.n.'0

/

. '-M.b.~'.V..

d :t T,. s,V Primary 81ast - Uest Fcce i K,.MM.:.< -.Q@:. M;,:.p:

Pottstown Trap Rock

..e.

,.na.,ga

.., rr

...... :,. r 4

.w

..:...w...,...,...<..:,

... :.:; w

..1~.

w. z.-

June o

. &:.w.%..m, r s.s '.*.g:yt.c,,.r 1.t<';. ~.:::w.:i,h-r..

" "'jh..a : m..,.

t.p...

... v:..-

.'".'$~.,'. g,p %

2:r

. ~. ' '

s.-,..

.. r

..n.. ;.,......,,v.. c.... -

...s.

a.,..:. :.,..

s,. s,., ;;...,:

o....

e, i..

' : y r '?y.,$.s... i.,

. *T

..'.....r..,e

... v.:

.y....~,s

..-.e..

.. : ~. p....

..,.,. x.~.

. 9

... (....

..;.,...s

.s.

- e..~y..

,,; r. ;.. < COPY NUM BER 2 OF 4

.~

.. :.. r. s..

.?.

. e..e..:,.

. m..... {\\. 3.

s001210

.3

??3

> w.:.7

. -..,v..

...~

Hazieton, Penna.

Jane 30, 1970 VIBRATION STUDY FDP.

0AMES & MOORE Pottstown Trap Rock - Sanatoga Quarry Primary Blast - L'est Face June 24, 1970

_PURp0SE The purpose ' f this study was to measure the vibration effects from the d

primary blast on June 24,1970 at the above named operation ar.d to determir.c their capacity to cause structural damage and to certify conformance to the

, Pennsylvania State Law.

_THE BLAST This blast consisted of 14 vertical holes, 6h inches in diameter, drilled to an average depth of 36 to 59 feet. The spacing and burden of the holes was.15 x 20 feet with an average of 12 feet of stemming material confining

. the charge in each hole.

The total load of 6631 pounds of Dupont Pcwder 'Ccmpany's HDP-1 Primers, Pourvex Extra, and ANFO "P" explosives was detonated in 14 separate

\\

firing periods by means of Millisecond Electric Delay Blasting Caps il thru #14 The maximum amount of explosives per delay period was 629 pounds.

d2tonation' was 11:03 A.M.

Time of l

[

t,

.m l

'.r

.g is

June 30, 1970 TEATHER CONDITI0tlS l.

Type of' day

- Clear 2.

Wind direction - Frcm the Southwest 3.

Temperature

- Appraximately 78 F SEISMOGRAPH STATIONS e

For registration of the vibration effects frca the subject blast tw o Vibra-Log 3-Ccmponent Seismographs were employed.

_ Station #1:

e Velocity Seismograph #178 (0.2 Range) was placed on the ground u

100 feet west southwest of Stack #A-20, approximately 2SO feet the bl'ast.

Station #2:

Velocity Seismograph #151 (1.0 Range) was placed on the ground e

Limerickleherating Station Site at Cecrdinate 3780 east an A

approximately. 2800 feet south southeast of the biast.

e

~

5 e

e e

ee e,

e*

b E

e e

e e

o e"

e e

e e

--e..a ee wo e mee ereo *** * ** e e - e g emm *

-m,m

THE SEISMOGRAP'H RECORD The seismo:;raph record represents a photograph of the velocity of vibrations of the surface on which the instrument is sitting, at the recording location, in the form of 3 lines. The bottom I!ne (longitudinal) represents horizontal velocity on a line joining the blast and the recording location; the top line-(transverse) represents velocity at right angles to this; and the middle line represents vertical velocity. Deviations of these lines from their positions of rest amount to the velocity of the ground magnified by an instrument factor depending on the range used for the seismograph test. In this case the range was set at 0.2 and 1.0 and the velocities were obtained by measuring the deviations of the traces in inches and dividing by the proper ci:ibration factor.

Vertical lines on the record indicate the passage of time in 0.02 seconds, with every second being indicated by an accent mark.

RESULTS Recent itudies by the United, States Bureau of Mines and other Authorities in the field of blatt vibrations and th2r es:cu on structures have resulted in a new criteria based on velocity in inches per second. B61ov is a table of standards based en a velocity criteria.

VELOCITY PROBABLE DEGREE OF DAMAGE Below 2.0 inches per s:cend

...... Recommended safe vibration level.

Above 4.0 inches per s cond Threshold - very minor perceptible damage; pla s er cracki, etc.

Above 5.5 inches per second

.... Minor - no apparent weakening of the 1

structure; 3 sss, plaster, masonry damage.

=

Above 7.5 inches per second

.. Major - serious structural failure through

~~

cracking, distortion or shifting.

The above table is bned on the Maximum Velocity no any one component of an instrument messerin;; motion in threv mutually perpendicular p!sno.

O

Dames & Moore June 30,1970 PESULTS C0fTINUE0 The Commonwealth of Pennsylvania Law states that in blasting operations the

" Peak Particle Velocity" of the ground shall not exceed 2.0 inches per second in any one of three mutually perpendicular planes, in the vertical and hori:ontal directions, at the immediate location of any dwelling house, public building, school, church, commercial or institutional building.

Tabulated belcw are the measurements resulting frca this blast.

SEISMOGRAPH t!AXDtutt NO. &

COMP 0tiENT VELOCITY LOCATI0tt (in/sec)

1. 178 Transverse

_1.6T

~

Quarry Vertical

1. JO Location Longitudinal 1.90 il51 Transverse 0.03 Project Vertical-0.02 Site Lonoitudinal 0.02 Note:

The safety of the recorded vibration effects is further substantiated by the mNew Jersey and Massachusetts Blasting Codcs.

CONCLUSIO!!S According to all recognized damage indices, the recorded vibration effects from the subject blast were below that necessary to cause structural damage to even old pre-stressed plaster, normally the weakest material of construction, at the. seismograph stations, in the immediate vicinity of the stations, or beyond the seismograph stations in,the same general direction and also conformed to the',

Pennsy1vania State Law governing blast vibrations.

Respectfully submitted, VIBRA-TECH ENGD:EERS, fNC.

Ek

'J}hnJ..jesetar Field Engineer v !.

I Anthony J.y />

Petro, P. E.

President

s

' Cient C d M $>....

.f. QO f 2,.....

Operaeion -IldE.S.I.Mb....

U.F.Arfb/l."I..b.Tfil0Al uou t~cm Specific Blast Loestson N..

N.. 9.. 9.3.7.bW.O...$. 20.d.-..3.4M.M.Q.p..hMfy

...._..... Dat e.

6 - M.-lo........ r...

siast xo--

Time of niast....U.':c3..A:.t1...

Holes....!..b...... Ho!e Dismeter......h. 7......... Avetage Depth.)..h...I. O No.of 3

23 (cross out one)

Average Subgrade Dri!!ing..._. k......

. Hole Spacings....

bg Burdens..... _7 O _I Average Stemming to Top Charge.._

Type and Delay Nos. Used.M.b..?.E To.5.9.o.

Decking Information (if any). ~

..~..~.- - -

Tctal Weight of Explosives.h.fQ.5 !

Lbs.

Averarg zxplosives Lor.d qer Hole....b.k..._.Lbs.

Make and Type of Explosivesb.h..DN.I

.U 0.Yb.5.... NS.b..

O 15,],,,,,,,,,,,,,,,,,

A_/.Jh.. Y ~5. 5 50...*) MP-i 'Pa.l.MGE. 56*

/

. cc evur Maximum Amount of Explosives Per Firing Period

...b..."2.

O

.. 8..

Lbs.

If Supp!ementary Ho!-s, Snake Holes, etc., were used give information as above.

f Conditions b.N-Wsather and k Wind from the..--

T(mperature..,,0.6. 8. 0...%..j. s Instrument Location..O.M...b2Q.9.Mb.

7 BAN. S.h.E-

.hh.D.1,..}S.

~

\\q..c.sT s e.SLr...A.u'.:. S.<.L.T of..

s....T..A...e..x

• A..- 7 o s > =.. m_

'i c..~'

Instrument Located 3pproximately 2..E.9 Feet

$. N

- from the Blast

~

(Direc: ion)

Remarks if Elast produced any unusual efects.

Siismegraph Nc...l.).k..-. $p.,.

.7 '?a.. Q:.

, Operated by..Z b,.....M h......

.g.

7 l DATP lo 24-7o ilijlll.ilJ.l.l!Ys

.Lfll l l H l!.}o.l.U.l)~.I, U.~lji n.illljjj,llH-lll]Illjilljjil llHI'l!!P 'IC l

II i

. jr

. v..aJ,l1,,.

i n n.

l Su

- n

. [.p i 1

I It "I/

I g

rm. W.o 7 4.M.

.td.J._p..'.!.

kh. d

. '..lc).d.

,,-... 5_

L _.l_

y. \\, S o '

u

,, n, p l i. u i.. p..i lr

.... =

o, m

,i i

t, I

I l

1:

i.

!.,r f, i

. %. i.,

i Hj 4.i l

_t __>__, l..l.?n. i. j.: :s,

/! 6l,l l.l ;p l [N I O,fi l l l 0,l l l i l l i l i l l ! i l 0_l l i l l l l l l i l l l i tillil!!illldijhg hl 111 0

- t.- l. 9()

f wuc

.m lh O. '2.

mecr Inr>A w H sycixzzaS Ixc by.. 'D.1M.0. a.t.

N._

(IJse reverse side for rough s'nciches o an ce profdo-a shot if Indicated)

M TCM~6**

~

7,

,y

-^,,.J'g e

~

a

,_, = _, &... n..c & - - - - ~ ' ^ ~ ' ^ ^ ^

SE!SMOGEAPHIC REPORT i:n al l ANU

, dientD.dhMh.....h 00ff,...

_ operatton..lli16f.l.MS.....F./.).EBf0/l.?..5.I.l.Tl0d Spcciac n!ast tocauen.MEsT. EML..d ?9.T..n~i~cw 7a.......,,.

Time of niast..\\.tn3...L.ti.... y u~on Mi mo s t xo.................

....-... Date..

p ['d**I Holes _

l.b.

Ho!c Dismeter......

b...... Average Depth 3. (c!~5'O 63' No.of 33 (cross out one)

\\

I-1 Ayerage Subgrsde Drilling

.. k Hole Spac!ngs... I..e Eurdens..

3.0 Average Stemr-ing to Top Charge

..k.

Type and Delay Nos. Used b.h....E.6 I. Q.Sco e

Decking Infatrastion (if any) ~.

Tct:1 Weight of Explosiyes h..O

' Lbs.

Avera e Explosives Load p:. Hole b Lbs.

Type of ExplosiyvesDh.D.

.9A.V.3...-. N..b.).0,1%,,, _

Make and,T '3sso3 +'s'-\\ Beat ses A.F 4

Maximum Amount of Explosives Per Firing Period f?.N Lb-If Supplementary Holts, Snske Ho!es, etc., were used give information as al.ove.

~.

We-ther and Sky Condi:!cns..bS$.h.

Wind from the.

Temperature..A,,c...c e..e W Instrumea: Leea: ion O.M C,E2t.ip.A dT 07.2 b..t..Nff.l.?.d1E.4)..M.4 S...II..h. m.L (. Q.C.. G...B.. p). 6...i.23 lC..o..E...A...s.T...d 66_ c^ o C. 2..T sh N..A3.}Cd a

Instrumen: Located Approxima:ely-MO ?peeg

5. S. %,

_from.the B!:st

. r er7 (Direc: ion)

,, C s. L

.R2 marks ?! Blast produced any unusus! e"ects

.- z.y.7

. i. ) o operated by.. Y.s.l,.

D--

Siismograph Nod.5.1

.el.6/M f_24.-70

~

.r o. o s

.~ m ;.

_.t...-

=-

a m~

...;:::m!:liiH!!ifiu N'llWin!;i!!Ui Ali LHii;!!,,.ll'.03 4.M. :i!'1!!!!!:i iU%

1pH:. !n/.in!ilHHij U:miil!ililHi.lihHiiiii!

i;:ilii' o.,i

• -0.or '"~= "

, n..

... a. o g;,

i n i

i l

[l i

i i

1iI

... u... a.....r..- : :=.m....,1. i.. -.......................

.. o.0 7,,~ m c _.. -

i

......a l

I. O '

l RANGr l

1

~

• I3 A-7ECH E}GINEERS. INC.

by.

iMEwf h.:.1 b

(t!;c reverse side for reagh sketches o0..

)

. a c.r prom

. shot II indicated)

4.,

l l

.