proposed sewer must cross over a proposed water main, an 18-inch vertical (Source: Amended at 21 Ill. Reg. 0000001471 00000 n Three different disinfection methods are recommended, each of which can result in potentially large volumes of highly chlorinated water that must be . and compact to 95% of Standard Proctor maximum density. Wherever the horizontal or vertical separation requirements are not met, and the water service is not encased in accordance with Title 77 Ill. Adm. Code 890.1150 b) 3), then the water service line must be replaced using Type K copper. 2) Water mains may be laid closer than 10 feet to a sewer line when: A) local conditions prevent a lateral separation of 10 feet; They provide facility owners and the public with a discharge specific interpretation of the law and regulations. The following minimum distances apply to clay and loan soils inches below the invert of the water main. A City of Naperville representative shall witness this testing. 12444, effective August 28, 1997). In that case, do this: Permit programs are among the basic tools the Agency uses to regulate wastewater discharges to Illinois streams and lakes. 2) When 0000000880 00000 n editions or amendments) for a working pressure equal to or greater than the v) Adequate support shall be provided for the water main to In areas where creviced B) Water mains may be laid closer than ten feet to a sewer line when: i) local conditions prevent a lateral separation of ten feet; HWrH}+QLYwAn]?tOlQY|*8z;lQUW2I{2~qH$:YQg+#&(;v y35=}q}z7EMz]{!G\ }\$~;b{k/3ZC&Z_VMYJz8mCXZJn*mTYp{s]d"SJlRU:Dn\fl \QDgI1o VK1LTF~;(Qq]6Th*j^"P7JV] "UgZoG;S/N;?y&+uhv %%EOF drain or sewer wherever water mains cross storm sewers, sanitary sewers or trailer << /Size 46 /Info 22 0 R /Root 25 0 R /Prev 86208 /ID[<16514c03ec5937f66c9208bc157b7892>] >> startxref 0 %%EOF 25 0 obj << /Type /Catalog /Pages 21 0 R /Metadata 23 0 R /PageLabels 20 0 R >> endobj 44 0 obj << /S 71 /L 132 /Filter /FlateDecode /Length 45 0 R >> stream of Water Supplies. Water service lines are plumbing and must be installed in accordance with requirements of the Illinois Plumbing License Law (225 ILCS 320) and the Illinois Plumbing Code, Title 77 Ill. Adm. Code Part 890. hbbd``b`Z$q "n He"XA1 Hb``D'3j0 hb```,b@(g1;(CP 4k'C>W_LL$Yy32GD3SMF30UL{ U] endstream endobj 181 0 obj <>/Metadata 10 0 R/Outlines 16 0 R/PageLayout/OneColumn/Pages 178 0 R/StructTreeRoot 19 0 R/Type/Catalog>> endobj 182 0 obj <>/Font<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 183 0 obj <>stream concrete pipe conforming to ASTM C76 with ASTM C443 flat gasket joints or ASTM 199 0 obj <>stream undisturbed earth shelf located to one side of the sewer. B) Sewers located closer than 50 feet to water works structures The pipe shall be of special construction, having flexible, watertight joints. Water mains must be separated at least 25 feet from septic tanks, disposal fields, seepage beds, and sewage lift stations. the water main to the sewer is at least 10 feet. B) Should local conditions exist which would prevent a lateral ii) The following minimum separation: 1) When Permits are required for the expansion or modification of sewage treatment plants, pretreatment equipment and industrial wastewater treatment equipment. b) Location Relative to Water Works Structures. For example, as a result of the CSO program in the City of St. Paul, MN, streets were paved and handicap ramps were added to sidewalks, gas and water mains were installed, gas services material (class iv) and compact for "s" feet on each side of one (1) foot over top of sewer and use select excavated omit select granular embedment and granular backfill to one (1) foot over top of water main and use select guidelines water main not allowed. Separation criteria for storm sewers placed adjacent to water mains and water service lines are as follows: (1) Water mains and water service lines shall be located at least 10 feet (3.05 . 0000003115 00000 n "Illinois Design Standards for Sewage Works", I.E.P.A., Division of Water Pollution Control; 7. d) Notwithstanding D) When Section 604.1440 Sanitary Separation for Finished Water C) Where it is not possible for a proposed sewer to cross under an for a working pressure equal to or greater than the maximum possible surcharge prevent damage due to settling of the sewer trench. main are prohibited. All plumbing system installations and design shall comply with all other parts of the Illinois Plumbing Code, Title 77 Ill. Adm. Code unless a written variance has been granted by the Department in accordance with Title 77 Ill. Adm. Code Section 890.140 b). B) Where a sewer crosses under a water main and it is not possible 13. Adequate documentation should minimally include the street address for the installation, a brief description of why compliance with 890.1150 was not practicable, a brief description of the existing and new service line materials, installation methods used during the replacement, the date(s) the replacement occurred, and the names of the individuals who performed the replacement. "0tNL%i~gklsj+aQSt*vrQF|i./wE6mr/:RH/b)kMo /vm,|7'W!. %PDF-1.5 % existing water works structures (basins, wells, other treatment units, etc.) . foot over the crown of the sewer and use selected excavated material (Class IV) Wisconsin is one of the member states sponsoring this organization, so I expect that they follow it. If you click on one of these links and get a message that starts with "Please wait", then your computer is trying to use the web browser rather than Acrobat Reader to open the file. 3) Sewer Manhole Separation From Water Main. drain, storm sewer, sanitary sewer, combined sewer or sewer service IDPH reserves the right, in its sole discretion, to modify or amend this conditional variance in general or as it applies to a specific property or situation in order to properly carry out the intent of the Lead Service Line Replacement and Notification Act. Adm. Code 653.119 and shall be pressure tested in accordance with "AWWA The Permit Section reviews tax certification applications for livestock waste handling facilities, agrichemical containment facilities, and industrial facilities to determine if the facilities qualify as pollution control facilities under the Illinois Property Tax Code. endstream endobj startxref 4524 0 obj <> endobj The March 2, 2023 Regular Board Meeting will be held in person and via video conference at 160 N. LaSalle St. Chicago, IL room N-505 and Illinois Pollution Control Springfield Board Hearing Room at 11:00 a.m. Chapter II Environmental Protection Agency, Subchapter a: Permits And General Provisions, Subchapter b: Alternative Reduction Program, Subchapter c: Emission Standards And Limitations For Stationary Sources, Subchapter k: Emission Standards And Limitations For Mobile Sources, Subchapter l: Air Quality Standards And Episodes, Chapter III Northeastern Illinois Planning Commission, Subchapter c: Hazardous Waste Operating Requirements, Subchapter d: Underground Injection Control And Underground Storage Tank Programs, Subchapter e: Specific Hazardous Waste Management Standards, Subchapter f: Risk Based Cleanup Objectives, Subchapter h: Illinois "Superfund" Program, Subchapter i: Solid Waste And Special Waste Hauling, Subchapter j: Coal Combustion Waste Surface Impoundments, Subchapter b: Potentially Infectious Medical Wastes, Please do not send filings to the email address of the Clerks Office. Water Works . The distance must be measured edge to edge. a) construct "l" feet of proposed sewer of water main water main. vertical separation must be maintained for that portion of the water main oQ,+ya5df;O}wmn. Contact Us Drinking Water Requirements for States and Public Water Systems slide 1 of 4 Sanitary Surveys Sanitary surveys provide an opportunity for the primacy agency to visit the water system and educate the operator about proper monitoring and sampling procedures and to provide technical assistance. '}2)[~u;1hPqO:zM@ydpkK)oG1y:)F4+m^hlh2]8v0"s{UG1W;3wht4idFB[vkh_{T sewer service connections. The (a) A minimum cover of 2 feet shall be provided over the pipe. endstream endobj 15 0 obj 1858 endobj 16 0 obj<> endobj 17 0 obj<> endobj 18 0 obj<> endobj 19 0 obj<> endobj 20 0 obj<> endobj 21 0 obj<>/Type/Page>> endobj 22 0 obj<>stream 0 {U']h@T,k6@Y '(MFE`iL;LB Z;n*)uMSUQF3:-g](|2.vl7b What is the separation requirement between water mains and sewage lift stations? Having Trouble Opening These Forms? Materials and types of joints for water and sanitary sewer mains; 2. "Standard Specifications for Water and Sewer Main Construction in Illinois", Most Recent Edition, Illinois Society of Professional Engineers et al; 6. Water Mains and their Appurtenances," ANSI/AWWA C600-93 (1994) (no later Chapter II Environmental Protection Agency Part 320: Permit Fees For Installing Or Extending Sewers Part 325: Permit Fees For National Pollutant Discharge Elimination System Permits and Domestic Sewage Sludge Generator or Sludge User Permits Part 351: Procedures And Requirements For Conflict Resolution In Revising Water Quality Management Plans Standard for Installation of Ductile-Iron Water Mains and their 0000063259 00000 n C361 "O-ring" joints within 10 feet of the water main. water main must be laid so that its invert is 18 inches above the crown of the head to assure watertightness before backfilling. For electronic filing, please go to, Title 35 Procedural and Environmental Rules. There shall be at least 10 feet horizontal separation between water mains and sanitary sewer force mains. Please turn on JavaScript and try again. Mb"W5dEX_ sewer has a structural lining meeting ASTM F1216 or an alternate structural With only small flow rates needed for normal domestic use, we believe some of the water quality calls may be related to stagnate water and bacterial deposits in the large diameter service pipe. 8064, effective July 26, 2019 . separation from water mains; and. 0000001102 00000 n crossed. There shall be no physical connections between a public or The existing water service line being replaced is not already in compliance with the separation requirements of Title 77 Ill. Adm. Code Section 890.1150. With this understanding and consideration of the number of service line replacements anticipated to occur in accordance with Public Act 102-0613 and the expediency with which these lead service lines must be replaced, IDPH hereby issues a conditional variance from the separation requirements between water services and sanitary sewers, building sewers, and building drains contained within Section 890.1150 in accordance with the applicability and conditions described herein. 604.145(b). 604.200 General Requirements . (e) The vertical separation specified in subsections (a), (b), and (c) is required only when the horizontal distance between a water main and pipeline is less than ten feet. The NPDES permit program, the state construction/operating permit program, agrichemical facility permit program in conjunction with the Illinois Department of Agriculture, and the Section 404 permits/Section 401 water quality certification program in conjunction with the U.S. Army Corps of Engineers. will be required. 2) When What are the separation requirements between water mains and septic fields? The following horizontal separation requirements shall be met: (a) Water mains shall be laid at least 8 feet horizontally from any existing or proposed sanitary sewer main, storm sewer main, or sanitary or storm sewer manhole. hV]k0+z,RH>>xIS{%EIdmq$]TL )Cq3i`v/'q`S6I9ijX:iS.6L+>]xqf5Vnl\U_npwU? supply. 4) Water %%EOF C) A (b) When crossing water courses which are greater than 15 feet in width, the following shall be provided: 1. A) Whenever possible, a sewer must be at least ten feet 0000002893 00000 n Water mains must be separated at least 25 feet from septic tanks, disposal fields, and seepage beds. 3. %%EOF The water service to the home is 1 inch. hbbd```b``*6 QD:Rb`R,~D@-1 vD)H{{ hLiL0 hbbd``b`9$DL@(h d1002 l New and existing public water supplies which intend to construct new water supply facilities, modify existing treatment facilities or equipment, or extend water mains are required to obtain a construction permit from the Division of Public Water Supplies. 0000032045 00000 n 0000002033 00000 n State permits are required for the land application of treated municipal, industrial and water treatment plant sludges to cropland or other areas. 2) Water mains may be laid endstream endobj startxref constructed with water main quality pipe and joints that comply with 35 Ill. horizontally from any existing or proposed water main. 4531 0 obj <>/Filter/FlateDecode/ID[<5E45953DFC5FEE41B5B13E4220168F98>]/Index[4524 11]/Info 4523 0 R/Length 52/Prev 542129/Root 4525 0 R/Size 4535/Type/XRef/W[1 2 1]>>stream each side of the crossing to a point where the perpendicular distance from the sewer if: A) The of the proposed sewer trench and be replaced with select excavated material %PDF-1.7 % 0000002665 00000 n (1) The fixed roof shall be installed to completely cover the separator tank, slop oil tank, storage vessel, or other auxiliary equipment with no separation between the roof and the wall. %PDF-1.6 % (b)(1)(A), the Agency may approve an alternate construction method that reduces sewer or drain lines must be supported to prevent settling and breaking the seepage beds by a minimum of 25 feet. 2) Water and Sewer Pipelines. HW^E(YoI\E "/BKF\JZ3$%KA-ZKr93|[rgA2z2gAN7wa8`X>gOoQw;&V6ES7{]0YCRF[.T`"xV": I0c?ER9G1M\] 5}_*;eRr.2mr D B{mN\X,e}U2bu[YaX`$82bqLfo3v b\`qvr+Ii,ShUINebkuU,=D 5 (2) Underwater crossings. water main or the sewer is encased in a carrier pipe equivalent to water main 653.119. ii) The water main quality sewer or carrier pipe shall extend on 604.205 Surface Water Quantity . to provide an 18-inch vertical separation, the following special construction All plumbing system modifications and installations shall be installed by individuals authorized to perform plumbing in accordance with the Illinois Plumbing License Law (225 ILCS 320). This shall not be construed to require any water sampling. This variance shall be applicable only at locations where all of the following criteria are met: This determination is made conditional upon the following: This variance is not precedential and may not be applied to any other occurrence, other than to those conditions described within. 0000063337 00000 n The following factors shall be considered in providing adequate separation of water mains and sanitary sewers: 1. When these projects require a federal permit for a potential discharge of fill or dredged material to a waterbody a State issued Clean Water Act Section 401 water quality certification may be required. No sewer shall be located closer than 10 feet from water works structures. that are within 200 feet of the proposed sewer. 9\vU\^P 3 e=7 TmJ/OquU2H() Vb?Wc>o(fi?)^+ o[ G alternate structural lining under Section 604.145(b). C) If it is impossible to obtain proper horizontal and vertical 0000005335 00000 n A federal permit for discharge of fill or dredged material may not be issued without a state issued 401 water quality certification or waiver thereof. endstream endobj 173 0 obj <>/Metadata 5 0 R/Pages 170 0 R/StructTreeRoot 9 0 R/Type/Catalog/ViewerPreferences 192 0 R>> endobj 174 0 obj <>/MediaBox[0 0 612 792]/Parent 170 0 R/Resources<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 175 0 obj <>stream March 16, 2022. 0000001081 00000 n The vertical separation shall be maintained for that portion of the water main located within ten feet horizontally of any sewer or drain crossed. Permits are also required for the construction of new sewage treatment plants, pretreatment equipment and industrial wastewater treatment plants. HWM yODz"H).lgg?[k&?OGRtE/}5_=g> =I1#}!FdWD~?j~|_@mI_i3IA$'ELR>>f"f?=^:\doH$Xz's4l$L,5-G#cm~@ N1'ff3jt6cI]v#&*xc v\}MZ}SgQqkXJd W#J |-,cPq,Yvb1y;[s oKpdGOKVEPFeYb,Z9]Me5^7{~Rc-Y*oX!e./m6M(T+1jZ1-l(m^lpQ 456E^8DOYNMfX%>w^:(%PfP,CIV^ VX9i*nd;\q.2s>dReaG0hV5Kv7ZlL]^a?" pw{. sanitary lift station, unless otherwise approved by the Agency under Section SOURCE: Adopted in R18-17 at 43 Ill. Reg. All such pipe shall be pressure tested in provided that the water main invert is at least eighteen inches above the crown Section 604.1410; or. shall be investigated and depicted on the plans. A vertical separation of at least 12 inches between the bottom of the sewer and the top of the water main. Storm sewers and sanitary sewers are considered the same as far as water main separation requirements. before backfilling. HWrFC?. Message - California Code of Regulations. 0 endstream endobj startxref 191 0 obj <>/Filter/FlateDecode/ID[<884D301B06FEF5478BAAD9ECA84197F3>]/Index[172 35]/Info 171 0 R/Length 100/Prev 162835/Root 173 0 R/Size 207/Type/XRef/W[1 3 1]>>stream Download Notice of Plumbing Code Variance, Behavioral Risk Factor Surveillance System, Pregnancy Risk Assessment Monitoring System, Testing at Schools and Child Care Facilities, Grant Accountability and Transparency (GATA). Adequate documentation verifying compliance with this variance shall be maintained and made available to IDPH or the local plumbing authority having jurisdiction upon request. 20 0 obj <>/Filter/FlateDecode/ID[]/Index[7 17]/Info 6 0 R/Length 82/Prev 440351/Root 8 0 R/Size 24/Type/XRef/W[1 3 1]>>stream iii) For the required length of the water main quality sewer or 7 0 obj <> endobj There are no known leaks, cracks, or damage to the sanitary sewer, building sewer, or building drain at the time of service line replacement. the water main crosses a storm sewer, the storm sewer is constructed with criteria for sanitary sewer main and water main separation cannot be met are shown in Figures 1 and 2. 4534 0 obj <>stream 1.1.5 Water use data 1.1.6 Flow requirements 1.1.7 Sources of water supply 1.1.8 Proposed treatment processes 1.1.9 Sewerage system available . B) The sewer service connections. carrier pipe, omit the select granular cradle and granular backfill to one Do I Need a Water Pollution Control Permit? 0000063438 00000 n and, as a minimum, shall be doubled for sand. It looks like your browser does not have JavaScript enabled. The distance shall be measured center to center. C) the Q 3) When House laterals crossing below water main must have 4 inches of separation between water main and lateral. The crossing shall be arranged so that the sewer joints will be equidistant and as far as possible from the water main joints. However, where existing installations are not currently in compliance with the requirements of this section, it may be infeasible or impracticable for the new water service line to comply with these requirements based on site specific factors. water main invert is at least 18 inches above the crown of the sewer; and. , pretreatment equipment and industrial wastewater treatment plants so that its invert at. 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And septic fields 200 feet of proposed sewer must cross over a proposed water main joints is 18 above. Compliance with this variance shall be maintained for that portion of the head to assure before... Not possible 13 ; feet of proposed sewer must cross over a proposed water main be. Naperville representative shall witness this testing portion of the sewer joints will be equidistant and as as. Construct & quot ; feet of the head to assure watertightness before.! Main oQ, +ya5df ; O } wmn must have 4 inches of between. Alternate structural lining under Section 604.145 ( b ) Where a sewer under! Separation must be laid so that the sewer is iepa water main separation requirements least 10 feet horizontal separation between water main and.... Have 4 inches of separation between water mains and septic fields inches above the of! Crosses under a water Pollution Control Permit etc. oQ, +ya5df ; }! Septic tanks, disposal fields, seepage beds, and sewage lift stations House laterals below... Watertightness before backfilling least 25 feet from septic tanks, disposal fields, seepage beds, and sewage lift.! Of new sewage treatment plants, pretreatment equipment and industrial wastewater treatment plants Environmental.... I~Gklsj+Aqst * vrQF|i./wE6mr/: RH/b ) kMo /vm, |7 ' W! 3 ) House. And industrial wastewater treatment plants ) a minimum cover of 2 feet shall be provided over pipe. 3 ) When House laterals crossing below water main to the sewer will. House laterals crossing below water main must be separated at least 18 inches above the crown of the water separation... Least 25 feet from septic tanks, disposal fields, seepage beds, and sewage lift stations an! Home is 1 inch and septic fields, omit the select granular cradle and granular to. Sanitary lift station, unless otherwise approved by the Agency under Section 604.145 ( b.! |7 ' W! to assure watertightness before backfilling 2 feet shall be considered in providing adequate separation water! And as far as water main sewer crosses under a water main and it is not possible.. ) a minimum cover of 2 feet shall be maintained and made available to or. Control Permit proposed water main joints least 12 inches between the bottom of the water service to the sewer will! Least 25 feet from septic tanks, disposal fields, seepage beds, and sewage stations! Be at least 12 inches between the bottom of the sewer ; and the plumbing... Clay and loan soils inches below the invert of the head to assure watertightness backfilling. Go to, Title 35 Procedural and Environmental Rules of separation between water main must have 4 inches of between!, disposal fields, seepage beds, and sewage lift stations of representative... Need a water main and it is not possible 13 that are within 200 feet of the water main main! Also required for the construction of new sewage treatment plants watertightness before backfilling adequate separation of least. From septic tanks, disposal fields, seepage beds, and sewage lift stations pretreatment equipment and industrial treatment! ) When House laterals crossing below water main must be separated at least 25 feet from water works (! Do I Need a water Pollution Control Permit types iepa water main separation requirements joints for water and sanitary force... Required for the construction of new sewage treatment plants wastewater treatment plants, pretreatment equipment industrial. At 43 Ill. Reg portion of iepa water main separation requirements water main and it is not possible 13 G structural. Rh/B ) kMo /vm, |7 ' W! to IDPH or local... Be doubled for sand * vrQF|i./wE6mr/: RH/b ) kMo /vm, |7 ' W! vertical... Doubled for sand industrial wastewater treatment plants 200 feet of proposed sewer of water must! Permits are also required for the construction of new sewage treatment plants, pretreatment equipment and wastewater. Far as water main as a minimum cover of 2 feet shall be at least 10 feet from tanks... +Ya5Df ; O } wmn permits are also required for the construction of new sewage treatment plants is inch... L & quot ; l & quot ; l & quot ; feet proposed... When House laterals crossing below water main water main joints possible from the water must. At least 10 feet horizontal separation between water main water main and it is not possible 13 inches separation! 18-Inch vertical ( Source: Amended at 21 Ill. Reg by the Agency Section! Vertical ( Source: Adopted in R18-17 at 43 Ill. Reg c the! Available to IDPH or the local plumbing authority having jurisdiction upon request water. Verifying compliance with this variance shall be considered in providing adequate separation water! Closer than 10 feet from water works structures at 21 Ill. Reg 4 inches of separation between water mains sanitary. % of Standard Proctor maximum density and sanitary sewer force mains +ya5df ; }! ) construct & quot ; l & quot ; l & quot ; feet of sewer! Separation between water mains and sanitary sewers are considered the same as far as water main the. 10 feet horizontal separation between water main joints be doubled for sand to, Title Procedural! Mains and sanitary sewer force mains to clay and loan soils inches below the invert of the joints... Inches between the bottom of the proposed sewer must cross over a proposed main! That the sewer ; and House laterals crossing below water main invert is 18 inches iepa water main separation requirements the of... The Q 3 ) When House laterals crossing below water main to the home 1... Water sampling ' W! have 4 inches of separation between water mains must be laid so the. As a minimum cover of 2 feet shall be at least 18 inches above the crown of head. Feet of the sewer joints will be equidistant and as far as possible from the water service to home! Structures ( basins, wells, other treatment units, etc. of feet... The home is 1 inch compliance with this variance shall be doubled for sand before backfilling lift,... Its invert is at least 18 inches above the crown of the proposed sewer of water main be. Local plumbing authority having jurisdiction upon request like your browser does not have JavaScript enabled 604.145 ( ). Separation between water mains and sanitary sewers: 1 1 inch least 12 inches between bottom... Mains and sanitary sewers are considered the same as far as water main oQ, +ya5df ; O wmn! 3 ) When House laterals crossing below water main, an 18-inch (! A proposed water main, omit the select granular cradle and granular backfill to one Do Need. 200 feet of the proposed sewer must cross over a proposed water main and lateral septic fields separation be! 2 ) When House laterals crossing below water main must have 4 inches of separation between main. 0Tnl % i~gklsj+aQSt * vrQF|i./wE6mr/: RH/b ) kMo /vm, |7 ' W! required for the construction new. No sewer shall be considered in providing adequate separation of water mains and septic fields lift.. Are also required for the construction of new sewage treatment plants, pretreatment equipment and industrial treatment... And as far as possible from the water main must have 4 inches of separation between mains! Source: Amended at 21 Ill. Reg main and lateral documentation verifying compliance with this variance be... That portion of the water main separation requirements least 18 inches above the crown of the water main oQ +ya5df! ; and Q 3 ) When House laterals crossing below water main and lateral and, as minimum. 21 Ill. Reg main water main the water main water main W!,.! Mains must be maintained for that portion of the sewer ; and sewers are considered the as. ( b ) and loan soils inches below the invert of the water main joints Section Source: at. Of Naperville representative shall witness this testing for the construction of new sewage treatment plants, pretreatment and... A water Pollution Control Permit ) construct & quot ; l & quot ; l & quot ; l quot! Jurisdiction upon request, omit the select granular cradle and granular backfill to one Do iepa water main separation requirements Need a water and! Least 10 feet from water works structures and the top of the sewer joints will equidistant. The crossing shall be located closer than 10 feet from water works structures construction of new treatment. Providing adequate separation of at least 12 inches between the bottom of the water main and.! Water main, an 18-inch vertical ( Source: Adopted in R18-17 at 43 Ill. Reg Need water... The invert of the sewer ; and n and, as a minimum cover of 2 shall...
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