ML20107F487

Testimony of B Aptowicz & C Zitomer Describing City of Philadelphia Water Supply & Transmission Sys.Related Correspondence

ML20107F487
Person / Time
Site:	Limerick
Issue date:	11/02/1984
From:	Aptowicz B, Zitomer C PHILADELPHIA, PA
To:
Shared Package
ML20107F481	List: ML20107F477 ML20107F487 ML20107F507
References
OL, NUDOCS 8411060535
Download: ML20107F487 (6)

Text

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[ x .. . ^ hELITED CCIGEM@IN51 ,

Statement 2 '

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2, 1984

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g . STATES OF d -5 g152  ;

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MJCLEAR REGUIATORY -

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EEFUtE THE MCMIC SAFETY Att LICENSING BORRD ,.

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~, Helen'FF Hoyt, Chainnan

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. Richard-F. Cole, Jdninistrative Law Judge Dr. Jerry Barbour, Jdninistrative Law Judge

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Phil*1raia Electric Company  : Docket Nos. 50-352 .

(d anrick Generating Station, 50-353 Units 1 and 2)  :

T!STIMONY OF BRUCE AP1MICZ AIO CHARLFS ZI'!DE!lR D!l SCRIBING.

THE CItt OF PHILADELPHIA'S . *,

WRTER SUPPLY AE UtANSMISSION SY9T!!M Q.l. Please state your names, addresses, positions with the City of Philadelphia and the purpose of your testimony.

A.l. My name is Bruce Aptowicz, Manager of Operations, Water Department, City of Philadelphia. My business address is One Reading Center, Wird

. Floor, Philadelphia, Pennsylvania, 19102.

My name is Charles Zitcmer, Chief of Iond Control, Water Department, City of Philadelphia. My business address is One Reading Center, tird Floor, Philadelphia, Pennsylvania 19102.

8411060535 841102 PDR ADOCK 050003S2 T pm 1

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.. The purpose of this testimony is to describe the City of Philadelphic'c ' l t

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water supply and transnission systen.

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. , Q.2. What are the City's current water consunptive demand rates for both

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average day and peak periods? ,

I f  % g A.2. These values vary somewhat "frczn year. to year. However, for Fiscal Year

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1984, the., average day demand was 3,42 million. gallons / day ("mgd").

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For the period, July 1, 1983 through June 30, 1984 the maximum day demand was 480 mgd. The peak half hourly rate was 717 mgd.

Q.3. Please describe the current total and usable volume capacities of the City's water storage structures.

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A.3. These values, with the inclusion of the recently consttrted Northeast and Northwest

• basins of East Park Reservoir, are:

Raw Water Total Capacity 428 m Maximum Usable Capacity 245 m Piltered hter

, ,. Total r'ap eity 738 MG ,

N* Maximum Usable Capacity 705 MG -

Total Water Storage -

Totrl Capacity 1166 m i Maximum Usuable Capacity 950 m

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Please describe the City's water distribution systen.

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A.4. The City's water distribution systen provides water service to l

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,f approminately~500iO00 cust m er accounts through over 3,200 miles of -

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t unter emin piping,, ranging in diamater from 3 inches to 93 inches. . %e .

.; ..'distEibutionnetworkisdividedintoelevenpressuredistricts,'with ,

,,; z " individual district water pressures ranging between '.30, Psi and 140 ' Psi. J

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, see. agow Mater in PhilalphiaJis Treated and Distributed,1982,"LCity '

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, . T Exhibit'"A".- Filtered water is conveyed both directly by gravity and ~

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! , .by the use of punips and equalizing storage reservoirs. Pumping capabi-s s ,

2 y, lities~are prov.ided by six (5). primary pumping: stations ~.and six d)-l .,

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l booster stations,.while filtered water is stored in fourteen (14) t a

reservoirs and standpipes ranging in volume fr a 1.5 million gallons to i'

302 million gallons.

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i c Q.5. Are there areas of the City that are supplied water fra a single raw l ~

{ water source only? -

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A.5. Yes. S e areas of the City supplied by a single raw water source ares i

l WWOMRMR Feuchase and the areas north of the Pennypack Creek.

The areas along the Delaware River and east'of.Nansingt e Ave., .

.. ' including Fishtown and extending to the Baxter Treatment Plant.

SCHUYIAILL RIVER The area known as the "Belmont High Service District," bounded by City Line Avenue, the Schuylkill River, Cobbs Creek,'and the Belmont Gravity District. This area includes the Overbrook and Wynnefield sections of the City, mis area is served only by the l Belmont plant through the Belmont High carvice Punp Station and I

cannot be fed by any other high pressure district.

The area east of the Schuylkill River and west of the Wissahickon Creek, including Manayunk and Rokborough. This area is served by 3

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the Roxborough High Service Ptup' Station and associcted tanks.

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.Q.6.: Nhat are}tM;majpinglications for service to these areas in the event

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ofthehvdilibi11ty the sole source?

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-'i.6. For- areas provided service' totally. fran one source, Jthe scheduling 'and implementation of'certain maintenance and repair work is more caplex .

. in the avant of the unavailability' of that scurce. .

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, . ,.gf For exauple, if at Belmont 'one 'of the two basins that constitute the major capacity at the facility is out of service this would have a .

major inpact on the time period the Belmont High Service District could be served if the Schuylkill source were unavailable. At the Belmont facility each one of the two basins constituting the '81 mg capacity is out every two years for _a period of li months to be cleaned.

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\ ons, alternative sources would be required in the event of an cutage of more than seven to eight days, since existing storage and transmission capacity is limited.

Q.7. . Decribe in nere detail the conditions under.which the maximum usable N.- , , ,'

storinge capacities of the reservoirs are not available.

t A.7. Water storage lis used daily to supply peak consunption rates and main-tain a relatively constant punpage. This daily usage is necessary to-maximize water quality and minimize power costs for punping, energencies such as a large anin break, firm, or watershed contamination

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may.also neccesitate the need for using st'ored water. 'Also ' storage

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reservoirs are routinely ~ taken out of service to facilitate. main-

-tenance. ,

Maximum usable' storage is rarely available. Under normal operating

, ts, t~ conditions?storagereservoirsareconsideredfull_abapproximately95 percent of the overflow level. This is due to the level of accuracy of

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s the instrumention.maasuring the11evel .of " stored . capacity and. precaution -

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taken due to the potential damage and loss of water if a reservoir were to overflow.

Q.8. Is the capacity of the water supply system ever limited by either main--

, tenance of facilities or failure of cwycnefits? If so, describe the frequency of these occurences and the inpact on the water supply system. $

A.8. Yes. During the Spring and Fall when water consumption is at a low for the year, scheduled maintenance and inspection of facilities takes place. Work on the water treatment plants, storage reservoirs, transmission mains and pumps is scheduled to minimize the inpact on the systen. However, an energency or cmponent failure during this period ,

could require costly cperations and yield reduced water service to the

consumer. In the event one of the two watersheds supplying the City becme unusable during such maintenance, the duration which stored l water could supply the effected area would be reduced. This is due to the reduction in storage and the reduction of flexibility of the system l to supply effected areas fran an alternative source.

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':similarly,in'tho'wIntermonths.increasedmainbreakageandicebuild-

. 'up on the Baxter and Queen Lane intakes reduce the systems' capaci.ty. -

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In the sumner months the occurrences of maintenance and dght '

failures.is ,less. However, storage, reservoirs are drawn down during _

peak consunption periods and failures of equipment have'a. greater -

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impact on the system. - -

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.Q.9. Does this ccuple w your testimony?

A.9. Yes it does.

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