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026 h PAGGI, MARTIN & DEL BENE LLP Consulti~ E~ineers & Land Suroeyors Cf)0 ). 54-56 Main Street Poughkeepsie, New York 12601 914-471-7898 914-471-0905 (FAX) j April 29, 1999 It~c ~,- ~4y V~" ~~ 0 J <J "0 ~~ (999 ~'" .sl\to C<A.. ~a~ ''f<t It Town Board Town of Wappinger P.O. Box 324 Wappingers Falls, New York 12590 Attention: Constance O. Smith, Supervisor Reference: Infiltration/Inflow Dear Supervisor Smith & Board Members: I have analyzed the flow figures tributary to the Tri-Municipal Sewer Plant from Phases I and II (Wappinger Sewer Improvement Area No. 1 and Rockingham Farms Sewer District) of the Wappinger Sewer TransmissionlTreatment Improvement from August 1998 through March 1999. I have enclosed copies of these monthly reports. The analysis of these figures indicated that the dry weather monthly average daily flow is in the neighborhood of 500,000 GPD, and the wet weather monthly average daily flow is 1,000,000 GPD over the course of this period. Some individual days actually have flows in excess of 1.9 MGD. As previously reported to you, the two districts have been experiencing significant amounts of infiltration/inflow, and in letters sent to you dated April 14th, 1998 and July 25th, 1998 we sought guidance as to what the Town Board wishes to do to correct the situation. To that end, you had authorized us to setup the framework of a program and report back to the Board as to what it may cost to initiate the program. I just received the March 1999 flow data in which I see the numbers increasing during times of heavy rainfall. As I compare this to the dry weather flows from the latter part of 1998, I noticed a rather large and increasing difference. It would appear that the problem, if anything, is getting worse. This point makes sense as some of the older lines within the two Districts are approaching 30-35 years in age. The type of pipe that was used in that era can weaken as the years go by. It should be noted that the type of pipe that is used now is more impervious to the elements and will stand up better over the course of time. Joseph E. Paggi, Jr., P.E. Ernst Martin, Jr., P.E., L.S. Charles R Del Bcn~, Jr., P.E. Constance O. Smith Town Board RE: Infiltration/Inflow - 2 - April 29, 1999 A Phase I Infiltration/Inflow study narrows down the area(s) that are experiencing extraneous flows and the Phase II study pinpoints the exact location and nature of the source of the infiltrationlinflow. . A Phase I and Phase \I analysis of infiltration/inflow problems for the Wappinger Sewer Improvement Area No. 1 and the Rockingham Farms Sewer District could run in the range of $150,000.00. This will identify the corrective measures that need to be taken, but will not do the corrective action itself. Obviously, the amount of cost of the corrective work can only be determined after the Phase II study. I would recommend to the Board at this point in time that they start thinking about having the Phase I and Phase II study performed on these two Districts. Perhaps an analysis of the monies left over from the first phase of the Wappinger Sewer TransmissionlTreatment Improvement should be made. The Comptroller and the Attorney should advise. If there are any questions or comments, please do not hesitate to contact this office. Very truly yours, Joseph E. Paggi, Jr., P.E. JEP:law Enclosure: July 1998 - March 1999 Flows cc: Hon. Vincent Bettina, Councilman w/enclosure Hon Joseph Paoloni, Councilman w/enclosure Hon. Joseph Ruggiero, Councilman w/enclosure Hon. Robert Valdati, Councilman w/enclosure Albert P. Roberts, Esq. w/enclosure Elaine Snowden w/enclosure Michael Tremper w/enclosure C!8~~ CS~) ~ r r- August 1998 ~ VWf POI(. tOW precialtlltlon Q1~ 848 311 511 02~ 828 338 524 ~ 518 2.9S S25 ~ 592 315 483 QS.AuGUIl-98 5.43 303 474 ~AuOust-a8 519 311 479 07-AUguet..e8 524 327 411 O&-A"guet-Q8 510 311 474 09-AuGust~a 592 332 496 '\ Q..AUguet-98 581 323 447 O.3"Raln 11-AUguat-98 581 332 498 0.1.~ain 12-Auouat-98 S33 ~ 473 1~uguet~6 526 319 471 14-AUgust-IS 514 315 470 1s.AUGu8l-98 575 344 485 18-AUgust-98 SS4 311 488 11-Auguet-98 S8e 319 481 '\ .0" Rain 1~Ust-98 588 299 483 0.3" Rein 19..Au9uat-98 S84 311 479 2Q-AuOust-9S 520 323 481 21-August-9a 507 2B6 457 22-Auguat-98 581 302 461 23-AUGuat-98 618 327 497 24-August--98 554 284 SOS 25-AUa-- 567 299 471 1.0" Rain 26-AUQust-98 615 311 411 27-AUGUIIt-98 570 291 507 2fW'UGust-98 530 283 484 ;a.Aua-98 578 315 485 3O-AUguet-98 808 323 513 31-AuOuat-98 587 283 514 TOTALS \6.998 9,665 15,02.2 AveRlge Daily 567 31:2. . 4SS p~ (%) 40.&% 23.2% 36.0~ a9/~l/lg~a 13:30 9l42~(~(~~ ~ g~(<:1--) ,- . OCT~05-1998 10:09 Date 01_September-98 02_September-98 03-September-98 04-September-98 OS-5eptember-98 oe_September-98 07 _September-98 0!S-Septcmber-98 09-September-98 10_September-98 11-September-98 12-5eptember-98 13-September-98 14-September-98 15-September-98 1 e-September-98 17 _September-9S 18-September-98 19-5eptember-98 20-September-98 21-September-98 22-September-98 23-Septemb.r-98 24_September-98 25-September-98 26-September-98 27 -September-98 28-September-98 29-September-98 3Q-September-98 TOWN OF WAPPINGER ~1c- t 1';" ,- ".,.. ,," '. \ 914 297 4558 P.01/r '7 '8 --zn3(~ - \ ':.:,,:~ '" .. .... \}/....i ~ '\~::J' "'~ "'-" . Precipitation 0.2" Rain 0.4" Rai" 0.4" Rain TOTALS Average Dally ....-. September 1998 VWF pOK TOW 486 Percent (%) 623 518 521 519 577 557 536 610 541 525 479 516 565 578 529 472 458 469 509 614 571 592 506 501 512 556 588 608 603 493 291 278 291 311 299 327 299 321 307 267 287 291 323 270 ~01 262 218 352 221 307 340 336 221 274 283 256 315 263 258 270 4S6 475 479 470 472 500 491 566 517 485 477 449 504 533 466 464 457 451 455 518 519 496 491 467 452 458 509 528 482 465 16,246 8,747 14,582 542 292 41.1% 22.1% 36.8% ),. TOTAL P.01 ~4/28/1999 11:59 2975719 TRI MUNICIPAL SEWER October 1998 Date VWF POK TOW preci_an 01..october-ee 520 318 481 02-October-98 50S 258 472 03-0ctober-98 557 283 485 Q4.0ctober-98 575 311 534 OS-October-98 565 278 551 S-Odober-98 551 307 480 07..october-QI 512 242 476 0.3" Rain Q8..0ctober-88 511 2e8 480 1.8" Rain 09-0ctober-98 748 323 808 o.r Rein 10-0ctober48 860 274 535 0.1" Rain 11-Qctober-98 708 332 821 12-october-98 623 278 585 13-October-98 853 315 577 14-0ctober-98 616 274 516 15-0ctober-98 653 278 630 1S-Qctober-88 603 295 558 17 -October-9S 639 28e 519 18-0ctober-98 820 311 582 19-0ctober-98 851 274 611 20-0ctober-98 602 274 525 21-october-98 589 268 514 22-october-98 Ss. 250 488 23-0ctober-88 559 283 484 24-0ctober-98 589 2M 480 25-0ctober-98 619 323 548 26-0dober-98 599 274 581 27 -october-98 887 270 508 28-0ctober-88 558 319 497 0.1" Rain 29-October-98 S48 209 551 30-0ctober-98 5304 287 490 31-october-98 583 258 483 TOTALS 18.466 8,763 16,458 Average Daily 596 283 531 Percent (%) 42.3% 20.1% 37.7% PAGE Ell ,." 64/28/1~99 11:59 2975719 TRI MUNICIPAL SEWER PAGE 132 , November 1998 I Date VWF POK TOW Precl~n 01 ~November-98 588 283 558 .. Q2-November-98 585 283 573 03-November-98 807 270 502 ~November-98 537 250 488 OS-November-M 538 2e8 478 06-November-98 509 283 46B 07 -November-" 549 250 473 Oe-November-98 595 295 519 09-November-98 599 287 543 0.1" Rain 10-November-98 571 258 4M 0.3" Rain 11-November-ge 514 250 460 12-November-Q8 525 307 517 13-November-98 514 282 477 14-November-98 543 278 483 15-November-98 606 311 528 16.November-88 625 295 584 0.1" Rain 17 -November-98 560 2&3 484 0.1" Rain 18-November-ea 501 254 482 19-November-98 510 266 472 20-November-98 509 242 468 0.2" Rain 21-November-98 606 291 480 22-November-98 615 319 520 23-November-98 8Q.4 287 547 24-November-98 563 274 489 25-November-98 502 258 411 0.1" Ratn 2e-November-98 523 274 521 0.7" Rain 27 -November~98 557 225 608 28-November..Q8 627 321 536 29-November-98 616 332 S62 3O-November-98 815 295 576 TOTALS 16,922 8,355 15,265 Average Daily 564 279 509 Percent (%) 41. 7% 20.6% 37.7% JAt-!-04-1999 11:30 _r, -OWN OF WAPPINGER 914 297 4558 P.02/02 ~ December 1998 Date VWF pOK TOW Predpitation 01-oecemt.r-91 &26 283 512 02..o.cemtMr-&8 551 307 417 o~",ber" 589 258 484 04-Decembtr-98 532 213 477 QS-Oecember...Q8 S84 283 484 oe-oecember..g& 623 338 534 07-December-M 839 291 5&3 0.1" Rain oa-oecember-98 613 291 J.a7 og.Oecembet..ga 560 291 434 10-0ecemDer-98 556 295 -439 11.oecember-98 511 319 ~ 12...oec:ember-98 592 283 460 13-Cecem~r-98 644 338 517 14-0ecember-88 628 315 542 1 s..oecember-98 622 291 478 1 e.Cecernbe,.98 592 315 473 0.1. Rain 17...oecember-9a 568 291 467 1 e.-OCQeMber-98 563 299 ,477 19-0ecemeer-98 598 311 464 2o-Decernber-98 626 356 S2G 0.1" R.ln 21 ~ecember-88 621 327 552 0.2" Rain 22-oecember-M 617 311 SOO Trace 23-0ecember-$8 553 380 503 24-Oec:ember-98 550 234 512 2S-Oecemb8r~8 554 283 582 28-0ecember-98 ~1 234 S45 27..oecember.98 639 338 581 2a...oecembe,..;s 628 311 557 29-December..oa 674 323 511 0.5" Snow 30.0ecem~r..Q8 585 332 510 31-Oecember-98 583 242 S22 TOTALS 18,402 9,347 15,594 Average Daily 594 302 503 Percent (oA.) 42.5% 21.6% 36.00,4. TOTAL P.02 ~.' ". 0"'" .".. January 1999 Date VWF POK TOW Precipitation 01..January-99 602 280 533 02..Jllnuary-99 612 307 520 0.7" Rain 03..January-99 850 344 522 04-January-Q9 840 409 769 05-January-99 718 332 593 Oel..January-99 593 311 560 07 -January-99 820 250 543 08-January-99 592 287 532 0.5" Rain 09-January-99 616 287 571 0.5" Rain 10-January-99 795 295 750 11-January-99 764 262 685 0.1"Snow 12-January-99 692 262 565 13-January-99 625 266 545 3.5"Snow 14..January-99 504 287 545 2"Snow 15-January-99 500 209 567 O.1"Rain 16-January-99 640 250 656 17 -January-99 70S 372 609 0.1 "Rain 18..January-99 808 283 628 19-January-99 1,209 315 1,033 20-January-99 931 283 886 21-January-99 783 307 784 O.4"Raln 22..January-99 804 295 787 0.1 "Rain 23..January-99 827 291 805 O.3"R.ain 24-January-99 998 344 945 O.S"Rain 25-January-99 1.456 307 1,434 26-January-99 1,125 291 1,099 27..January-99 926 274 951 28-January-99 845 348 888 29-January-99 792 258 828 30-January-99 831 307 765 31-January-ge 820 344 191 TOTALS 24,223 9,267 22,689 Average Daily 781 299 732 Percent (%) 43.1% 16.5% 40.4% ~12l/c0 . d 1N3Cll NCl3t^l3S ~c:60 666~~60-Cld~ :20'd ll:llOl February 1999 Date VWP POK TOW precl~on 01 ~.bni.ry-99 78Sl 282 no Q2-February-89 n9 283 e80 0.4"~n 03-Februa~9 883 303 8S4 0.4" Rain 04-FebNary-99 809 312 833 05-February-99 794 282 823 0.15" Rain Oe-f'ebruary-99 792 289 754 . 07 -February-SS 804 344 804 08-February-99 785 283 797 0.5" Snow 09-February-99 n4 278 712 1 Q..February-99 714 274 1576 11-February-99 702 303 661 12-February.99 670 307 636 0.5" Rain 13-February-99 788 287 681 14-February-99 822 3SlS 764 15-February..sS 817 323 739 16-February-99 786 311 735 17 -February-99 703 291 649 0.3" Rain 18-February-99 6"18 287- 632 0.6" Rain 19-February-99 917 319 900 20-rebrUary-99 905 287 844 21..pebruary-99 869 348 869 22-February-99 850 285 840 23-February-99 813 288 718 24-February.-99 700 270 6S5 2S-February..gg 889 380 659 2.5" Snow 2e-February-99 870 221 653 27 -February-Be 70e 278 625 28-February-99 757 344- 701 0.9" Rain TOTALS 21,785 8,443 20,704 Average Daily 778 302 739 Percent (%) 42.8% 16.6% 40.7% :20/:20'd IN3~1 N~303S 8c:60 666~760-~dl:l ...'- ,.APR-07-1999 12: 39 .; .. TOWN OF WAPPINGER 914 297 4558 P.01/01 March 1999 Date VWF !OK. TOW Preci_Dn 01-M..... 84S 332 711 02-M.rch H 857 281 1S1 03-Man:boI8 m 37 745 1.4" ftIIln Q4.MlII'ch4I 1,118 413 914 Q5.M~ 1,284 2a2 1,357 os-uard1-8l 1,124 319 1,_ 1.0- R.nlSnow 01...March-H 1,072 378 1,114 Q&oMarch-a8 1,03$ 408 1,OM Q90Mard'l--99 9S8 323 910 1o-Marc:h-88 859 299 814 11~arch-99 8S9 282 821 12.M.r.8I 810 358 m 13-March-81 8S2 217 751 14-M..-ch-8SI aS8 352 7. 0.9- Rain/Snow 15-March-8S1 850 315 807 1Na1arctt-81 139 - 147 17-March-n 850 303 m 1 e.M.f'Ch.99 834 3M) '821 1 &oMarc:n.-n 779 250 781 2()..fMrdt-9I 798 298 732 21.tMrch" 858 368 789 2.3" Rain 22-March.... 1,100 332 1,015 0.211 Rain 230M_ch-98 1,aaO 344 1,_ 0.2" 'Rain 2.4oMarc~9 1.~QO 30'8 1,_ ~arch-8t 1,200 327 1,261 2e-March-09 1,100 307 1.116 27..March-" 1,000 323 1,002 0.3- Rain 28-M.rch-09 1,000 358 1,014 28-M.rch-oM 1,000 291 1,028 3O-March-d 1.000 281 180 31-M.rch-81 900 341 810 TOTALS 30,690 9,910 30,066 AWI't.Ige Daily 990 320 970 Percent (%) 43.4% 14.0% 42.5% TOTAL P.01 ...:"-