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HomeMy WebLinkAboutReso 1949-1056 as l _a t . y RESOLUTION NO. 1056 RESOLUTION APPROVING CONTRACT DOCUMENTS FOR CONSTRUCTION OF .A SANITARY SEWER IN "J" STREET AND DIRECTING PUBLICATION OF ADVERTISEMENT FOR BIDS THE .CITY COUNCIL OF THE CITY OF CHULA VISTA, CALIFORNIA DOES HEREBY RESOLVE, AS FOLLOWS: SECTION 1: That those certain Contract Documents for the construction of a sanitary sewer in "J" Street, a copy of which are attached hereto and by this reference made a part hereof, be and the same are hereby approved. SECTION 2: That Herbert V. Bryant, City Clerk of the City of Chula Vista, be and he is hereby authorized and directed to publish the "Advertisement for Bids", a copy of which is attached hereto, for the time and in the manner required by law. ADOPTED, SIGNED AND APPROVED this 9th day of August, 1949. Gr��L �4 ., /t / Mayor of the ' ty of Chul. Vista, alifornia. ATTES . City Clerk of the ..' y of Chula Vista, California . s STATE OF CALIFORNIA) COUNTY OF SAN DIEGO) ss. CITY OF CHULA VISTA) • • I , HERBERT V. BRYANT, City Clerk, of ''he City -of Chula ',_ C Vista, California, DO HEREBY CERTIFY that the foregoing Resolution was duly adopted by the City Council of said City and was approved by the Mayor of said City at—a regular meeting of said Council held on the 9th day of August, 1949, and 'that --1-\ r }i yy,i • it was so adopted by the following votes: AYES: Councilmen ladder.Koester,Riesland.Nashold,Dyson NOES: Councilmen None. ABSENT: Councilmen None. City Clerk of the City • STATE OF CALIFORNIA) Chula Vista, California. COUNTY OF SAN DIEGO) ss. CITY OF CHULA VISTA) I, HERBERT V. BRYANT, City Clerk of the City of Chula Vista, California, DO HEREBY CERTIFY that the above and fore- going is a full, true, and correct copy of Resolution No. and that the same has not been amended or repealed. DATED: August , 1949. City Clerk of the City of Chula Vista, California . -2- 11 ;64 • CITY OF CHULA VISTA, STATE OF CALIFORNIA ADVERTISEMENT FOR BIDS Notice is hereby given that the City of Chula Vista, State of California, hereinafter referred to as the "Owner," will receive up to, but not later than 7 o' clock P.M. , on the 23rd day of August, 1949, sealed bids for the award of a contract for the furnishing of' all labor, materials, equip- ment, transportation and services for the completion of a sanitary sewer in J Street, in the City of Chula Vista, Calif- ornia. Such bids shall be received in the office of the City Clerk of the City of Chula Vista at the City Hall in the City of Chula Vista, California, and shall be opened and publically read aloud at the above-stated time in the Council Chambers of the City of Chula Vista in said City Hall. Each bid must conform and be responsive to this invitation, the Plans, Specificiations, and all the other documents com- prising the pertinent contract Documents. Copies of the Con- tract Documents are now on file and open to public inspection in the offices of the said City Clerk and in the office of the City Engineer at the above address, ' and may be obtained at either place by depositing $10.00 for each set. This deposit will be refunded if the set or sets of Contract Documents .. delivered are returned in good condition within 10 days after the bid opening. Each bid shall be accompanied by a certified or cashier' s check payable to the Owner, or a satisfactory bid bond in favor of the Owner executed by the Bidder as Principal and a satisfactory surety company as Surety, in an amount not less than ten (10%) percent of the maximum amount of the bid. The -1- r .‘ .. itv V r check or bid bond shall be given as a guarantee that the bidder shall execute the contract if it be awarded to him in conform- ity with the Contract Documents and shall provide the Surety Bond or bonds as specified therein within five (5) days after notification of the award of the Contract to the bidder. The Owner reserves the privilege of rejecting any and all bids or to waive any irregularities or informalities in any bid or in the bidding. The Owner has determined the prevailing rate of per diem + wages in the locality in which this work is to be performed for each craft or type of workman needed to execute the contract, which will be awarded to the successful bidder, to be as follows: Trade or Occupation • $--Hr. Day Hourly Wage Rate Laborers, General or Construction, including all laborers not herein separately classified on all types of construction $1. 57 Laborers, Operators and Tenders of pneumatic and electric tools, vibrating machines and similar mechanical tools not separately classi- fied herein 1.77 Laborers, Special Cutting torch Operator 1.40 Concrete Curer 1.525 Pipeline laborer 1.35 Tractor Operator, Bulldozer, etc. 2.12 Trenching Machine Operator 2.20 Truck Driver-Less than 6 tons 1.65 Water Truck Drivers-2500 gal. or more 1.$2 Sewer Pipe Layers 1.87 Sewer Pipe Caulkers 1.75 Foreman: All foreman not herein ' separately classified shall be paid not less than $1.40 per day more than the journeyman rate for the craft involved. Apprentices: May be employed in conformity with Sec- tion 1777.5 of the California Labor Code. OVERTIME: Not less than one and one-half (1i) times the above prevailing rates of per diem wages shall be paid for over- time work performed on Sundays and legal holidays as defined in Section 10 of the California Political Code and for work performed -2- l+ in excess of eight (8) hours in any one calendar day where such overtime work is permitted by law. It shall be mandatory upon the Contractor to whom the Contract is awarded, and upon any subcontractor under him, to pay not less than the said specified rates to all laborers, workmen and mechanics employed by them. in the execution of the contract. No bidder may withdraw his bid for a period of thirty (30) days after the date set for the opening of bids. DATED: August 9th, 1949. • * Herbert V. Bryatt, City Clerk of the City of Chula Vista, California. -3- r t n f• GENERAL REQUIREMENTS Definitions and Terms Whenever the following terms are used in either these specifications or in any document or instrument wherein these specifications govern, the in- tent and meaning shall be interpreted as follows: City -. The City of Chula Vista, California. ' Engineer - City Engineer, or his authorized deputy, agent or repre- sentative. 'Plans - All plans, profiles, 'maps or drawings which shot the location, character, dimensions and details of the work to be .done. Specifications - The written directions, provisions and requirements governing the procedure to be followed in connection with the performance and execution of the work; the quantities and qualities of materials to be used and'the method of measurement of quantities of work. work - The entire contemplated work to be' executed as indicated on the plans, and in accordance with the specifications. Contractor - Th.i`party or parties contracting to perform the work • covered by these specifications. A.S.T.M. American Society for Testing Materials - The references to the foregoing shall_be construed to 'mean the standards, with all subsequent amendments, changes or additions as there- after adopted and published, that are in effect at the date of these proceedings. - • SFEC IFIC4'I'ION - PAGES 1 TAD 19 It1G . PREPAIED • • H tzo D �. FO ST ER AUGUST 9, 1949 R. E . �ia5 <oo • k/0-661 1 V METHODS OF CONSTRUCTION Open Excavation--- (a) The Contractor shall make all necessary excavation to construct the. work shown on the plans. Excavation shall include the removal of all water and all mater- ials or obstructions of any nature that would interfere with the execution of the work. The trenches and other excavations shall be. kept entirely free of water while concrete • .or pipe is being laid and until the concrete or mortar has had its final set. (b) The Contractor, at his own expense, shall provide sufficient pumping equip- ment and the operation thereof to remove ground water from the excavation. Water shall be disposed of in such a manner as to cause no injury to public or private property nor be a menace to the public health. • (c) If the bottom of the excavation is sufficiently hard that pits for pipe bells cannot• be readily excavated with a hand trowel, or if a pick is required for this pur- pose, the trench shall be excavated td a depth of one inch below the bells and refilled to grade with clean sand or pea gravel thoroughly compacted into place at the Contrac- tor's expense for all labor and material. (d) If any trench or tunnel thrQugh. neglect of the Contractor, be excavated below the bottom grade as•required by the plans, it shall be refilled to grade with clean sand or sand and gravel thoroughly compacted into place at the Contractor's expea8efbi all labor and material. (e) All water pipe extensions shall be made in trenches separate from those used for sewers. Unless otherwise specified, such extensions shall be laid in trenches having ', a depth of not less than 22 feet below the surface of the ground and located at a dis- tance from the sewer trench of not less than 3 feet. (f) At street 'crossings or where existing driveways occur on a street, the Con- , tractor shall make provision for trench crossings at these points, either by means of backfills, tunnels, or temporary bridges as the Engineer may direct. (g) There the foundation requires the use of gravel or crushed rock under the pipe, because of a soft, wet, spongy or unstable condition in the trench, gravel or crushed rock shall be used as required by the Engineer. Furnishing and placing this gravel or rock in the trench and making the necessary excavation shall be paid for as additional work as provided in Section 6, except that any wet or soft material, which in the opinion of the Engineer is• due to a lack of di- ligence on the Contractor's part in prosecuting the work and which was preventable by , 9 • •t' reasonable care, shall be removed and replaced With gravel or rock at the Contractor expense. (h) At least 6 inches ,in the clear between the otter surfaces of manholes and • - other structures shall be left between'the .embankments or timbering which may be used to protect them.. f'i) In the event that blasting is necessary in excavating,;the blast shall be blanketed with timber mats. -No blasting shall be done within 5 feet of any.wate +,`, gas; _ a4 ' sewer or other pipe, main or conduit, intersecting or parallq ing 'the excavation , , Special permission, in writing, must be obtained from the Engineer before any blast134 ` will be permitted. r" ' Width and Depth of Trench--- (a) Minimum-Width of Excavation. For sewers in trenches the minimum tidth of ez- cavation shall be' 12 inches (6 inches on each side) more than the exterior diameter of ' the pipe exclusive of'sockets and branches. If sheeting is required by _the Enginee ', the width `shall not exceed the maximum width* specified hereinafter. "` ' S (b) Maximum wiattl of Excavation. The maximum width of excavation measured at the top of pipe, which includes the width required for sheeting If necessary, shall be as • shown in the following tables. ' STANDARD STRENGTH PIPE Trench pepti.,Measured -frau invert of Pipe to Top of Fill MAXIMUM WIDTH OF TRENCH • Pipe Size 8' to 10' 8' or less • 12 2' - 7" , None EXTRA STRENGTH PIPE Trench Depth, 'Measured from Invert of pipe'-to Top of Fill MAXI ?! UM WIDTH OF TRENCH Pipe Size 18' to 20' 16' to' 18• 14' to 16' 12' to 14' 10' to 12' 10' or less 12 " 2' -` 8" 2'-9" • 2'-9" ' 2'-ll" 3'-1" none If the'maximum allowably width specified in the 'foregoing tables is exceeded, the Contractor shall, at his own'expense baekfill-to the springing line with Class B Concrete. Bracing Excavations--- (a) 'Excavations shall be so braced and supported that they will be safe, and. the ground alongiOIde the excavation will not slide or settle,, and all existing improvements of any,kind, either on public or private property, will be fully protected from damage. �r tiz 1 If any damage does result to such improvements, the Contractor shall make the neces- sary repairs or reconstruction at his own expense and as directed by.-the Engineer. Sheet piing and other timbers shall be drawn in such'a manner as to prevent caving of the walls of the excavation. • • • • • • • • • • • • • • • + • • 0 4 Pipe Laying--- (a) All pipe shall be laid without break, "up grade from structure to structure, with bell ends of the pipe up grade. Pipe shall be laid on an unyielding foundation with joints closely and accurately fitted true to line and grade and with a uniform ' bearing under the full length of the barrel of the pipe. Suitable excavations shall be made to receive the bells of the pipe. - (b) Special care must be taken to secure a perfect filling of the annular space- ' in pipe joints in the bottom, sides and top. Previous to the placing of the jointing material, the annular space, together with the surface of the pipe, bounding the• same, shall be completely freed of all dust, earth, sand, small stones, water or other matter. _ (c) t1here any portion of .the trunk sewer is located within 10 feet of any tree • . (measured horizontally from the center line of the sewer to the center of the tree) the removal of which is not included in the contract for the sewer improvement, the joints of the pipe shall be entirely encased in 4 inches of 1:2 mortar (Soetion 2 114, and no additional compensation for the placing of such mortar will be allowed. Whenever the Engineer finds it necessary to' encase the joint of any pipe in mortar, exclusive of the,, foregoing and where it cannot be ascertained in advance, payment shall be made fbr such additional work as provided for in ,Section 61% entitlednadditional work." (d) Whenever the sewer is found to be endangered, in the opinion of the Engineer, by poles near the line of the sewer, such sewer shall be encased in concrete, ao per-- • plan S- a 110. The cost of such encasement is included in .the price bid per linear foot . of sewer and no additional compensation for the placing of such concrete will be'allowed. ' (e) ,^,There the trunk sewer is located under existing or proposed steam or"•electric, railway tracts, under existing or proposed manholes, storm drains, sewers or '-irrigation '° -` lines, it shall be encased in ,Class "B" concrete of the dimensions as shown on the plus, and no additional compensation for the placing of such concrete will be allowed. If • such encasement is not shown or 'indicated on the plans 'and required.by the Engineer-pay- ment shall be made for additional work' as provided for in Section *entitled "Additional • work" (f) Walking on, or disturbing the pipe in any manner, after the joints have been made, will not be permitted, , (g) At the close of each -day's work, or whenever the work ceases for any reason, , the end of the pipe shall be protected with a close fitting stopper. ' (h) The entire annular space in all pipe joints between the exterior of the bar rel and the interior of the socket shall be completely filled as specified below0 . - 5 • • ■ '* Backfilling Trenches in Streets, Roads and Other Improved Areas a Trenches in or through improved areas £hall be backfilled in layers 1• not exceeding six inches in thickness; each layer beitg properly dampened and thoroughly tamped°by means of machine or hand tampers before the.next layer is placed thereon. The-trench shall be backfilled to the finished surface of • the improved area in this manner. No flooding of trench backfill will be al-. lowed in improved areas. - • S ' • • • • • { -=� • r G1 RESTORING TRENCH OR STREET SURFACE, CONCRETE WORK, ETC. • (a)` All streets or alleys in which the surface is removed, broken or damaged, or in which the ground has caved in or settled, due to the installation of the improve- ments, shall be resurfaced and brought to the original grade and crown section by the Contractor, as indicated on the plans and as specified hereinafter under Trench and Street Resurfacing. In the absence of specific designation on the plans and where the street has been improved with roadway surface, curb, .sidewalk or gutter, excavations shall be resurfaced with the type of resurfacing conforming most nearly to the surface • as it existed at the time the Contractor entered upon the work. • • • 7 • 1f ,.• + ti a. ,s ,..�..�. �+ 0 .,.�. ._a �..— r—tea..�.—�....,1.—#yt---''-e ,-.` 1 4 . A S}• • , d . • ° LINE AND GRADE STAKES _ ' (a) All surveying necessary and adequate for construction.purposes will . be done by the Engineer of Work. . , &4 (b) The Contractor shall give 24-hours notice, in writing,when he will'te- quire the services of the Engineer of Work for laying- out any portion or the wox2cy . "t and he shall dig all holes necessary ror line and grade stakes. The Contractor'.' - • shall preserve all stakes set for lines, grades or measurements or the work in ,' '•, ti:' ry 4{r their proper places,f;until authorized tb remove them by the Engineer of Work;, " . . .Any expense incurred in replacing said stakes that 'the Contractor m- have faded ' ' Th to preserve shall be borne by the Contractor. ♦ 5 .y2, zF ♦?,. , (c) Grades for all pipe lines will,.be set on the s .rfae&' of :the ground.and ` ",,---`..-•,! *" . , 7a the Contractor shall transfer them to the bottom of the .trench. At no time shall :` '°, A ' less than 3 consecutive grade points be used in common -so that any variation irbm ;; ." - j,- k n straight grade may be noted. „ . 5 ° '• , •'�.. � r 1, • ° 41 fi ' r. a % y - -' S 73♦ ' • Y _ R • :4 µ ' • ' •_ . , > ` ' ` , 1. , ' s ,t i' c . . Y , . ' k ;,, . • ..ar • DISPOSAL OF M?'i'VIAI$ (a) Material excavated in streets and roadways shall be laid alongside 'of the trench and kept trimmed up so as to cause as little inconvenience as possible to the public. Free access shall be provided to all fire hydrants, water gates, meters and private drives, and means shall be provided whereby storm and waste water can flow in the gutters uninterruptedly. (b) All material excavated in streets, roadways, and rights of.way, not required for backfilling, shall be promptly removed and disposed of by ,the Contractor. (c) No surplus material shall be dumped on private property unless written per- mission signed by the owner of the property is furnished the Engineer. • • • 9 $t 4q . • Y a t 4 • • VITRIFIED CLAY PIPE . 3• ri (a) Classes and Quality. Vitrified clay pipe shall be of two classes, desig- nated respectively as Standard Strength and Extra Strength; they shall,be first. quality, durable, vitrified., sound, of well burned clay throughout their entire thickness, and must give a clear metallic, ring when struck with e hammer. Pipe may be glazed bx un- glazed, except that the bore of all 4 inch pipe shall be covered with a ceramic glaze"- of uniform quality. The glaze shall adhere firmly ,to the pipe, and be free from chips, crazes, blisters, hair cracks, or other imperfections. (b) Glazing. There pipes are glazed, not less than 95% of the interior surface " shall be glazed. ' (c) . Shape. All pipe or fittings, except as herein provided, shall have a socket end and a spigot end. The spigot ends •shall be true, circular and concentric with the barrel of the pipe, be cut off on a'plane at right angles to the longitudinal axis of the pipe and at nocpoint shall the thickness of the shell of the extreme outer end of the spigot be less in thickness than the shell of the main body of the pipe. The socket ends shall be square with the longitudinal axis and shall,be true, circular and .coneen- ' x trio with the barrel of the pipe,`;., (d) Scoring. All pipe and fittings shall be scored.,on the inside of the socket and on the outside of the spigot, said scorings to be triangular shaped or -circular :,. . shaped grooves approximately 1/8 inch in depth and 1/8inch in width. The minimum num- ber of scorings shall be 2 for pipe.10 inches and under and 3 for pipe over 1Q, inches in diameter. (e) When so specified, pipe or fittings need not- be socket pipe, but the type of joint shall be acceptable to the Engineer. The ends of all pipe or fitting's shall bp_ . so formed that, when they are- laid together and the joints made, they shall constitute a continuous and uniform line of pipe, and shall have a smooth °and regular interior surface. S (f) Identification 'Marks. All pipe or fittings shall be clearly marked With the • " S name of the manufacturer or with a trademark of a size and.type which has been approved by and filed with the Engineer. The- manufacturer shall stamp or stencil clearly on each pipe. or fitting marks indicating the class and quality of pipe. . 10 ry • • (g) Lengths. The length of straight pipe of all sizes (except straight end pipe)', exclusive of socket length, shall not be less than 3 feet. Straight end pipe shall be not less than 5 feet in length. . For special purposes shorter lengths may be used. (h) Dimensions. The dimensions of Standard Strength and Extra Strength Vitrified ' Clay Pipe shall be as given in the tables below. . TABLE OF DIMENSIONS FOR STANDARD STRENGTH VITRIFIED CLAY PIPE Col. 1 Col. 2 Col. -3 Col. 4 Col. 5 Thickness Depth Thickness Minimum Size of Barrel of Socket of Socket Annular Space • 12 in. 1-1/8 in. 2-7/8 in. 3/4 in. 5/8 in. ` • TABLE OF DIMENSIONS FOR EXTRA STRENGTH VITRIFIED CLAY PIPE • Col. 1 Col. 2 Col. 3 Col. 4 Col. 5 Thickness Depth •Thickness Minimum Size of Barrel of Socket of Socket Annular Space 12 in. 1-1/8 in. 2-7/8 in. 7/8 in. 5/8 in. The annular space is the space between the inside of the socket of one pipe or fitting and the outside of the spigot of another pipe or fitting when placed in said socket. The minimum annular space as shown in Column 5 of the above tables shall be measured at the end of the socket farthest from the base of the socket. The space -at the base of the socket, known as the caulking space, shall be not less than 1/2 the minimum annular space herein defined. • (i) Limits of Permissible Variations. The limit of permissible variations from • the dimensions given in the tables above shall be as follows: LIMITS OF PERMISSIBLE•VARIATION FOR STANDARD STRENGTH AND EXTRA STRENGTH VITRIFIED CLAY PIPE, • Col. 1 Col. 2 Col. 3 Col. 4 Col. 5 Col. 6 • Nominal Length Depth Thickness Inside Diam. Length of Size Inches Socket of Barrel of Barrel 2 opposite Inches Per Foot Inches Inches Inches sides-Inches (-) (-) ( 4 -) (. ; --) per foot 12 in. 1/2 in. 1/4 in. ' 1/16 in. 5/16 in. 1/8 in. Note: The minus sign (-) alone indicates that the plus variation is not limited; the plus and- minus sign ( 4• - ) indicates the variation limits in• both excess and deficiency, (j) Imperfections. All pipe and fittings shall have smooth interiors and shall be free from injurious cracks, checks, blisters, broken extremities, or other imperfections. The following imperfections in the barrel or socket of a pipe or fitting will be considered injurious and cause for rejection: 1 I �. When variation in any dimension exceeds the permissible variation given in table above. A single crack in the barrel of the pipe o-r fitting which extends through the en- ' • tire thickness, regardless of the length ofssuch crack. A single crack which extends through 1/5 of the barrel thickness or•is more than 3 inches long. Any surface fire crack which is more than '3 inches long. Any surface fire crack which is more than 1/32 inch wide at its widest point. Lumps, .blisters, pits, or flakes on the interior surface of a pipe or fitting. When the barrel or socket of the pipe or fitting varies from a true ,circle more . than 3 per cent of its nominal diameter. i• When a pipe"or fitting, designated to be straight, exhibits. a deviation from a straight line of more than 1/8 inch per linear foot. The deviation shall be measured from a straight edge -on the concave side, and shall be computed by dividing the total deviation, measured in inches by the total length in feet of the pipe or fitting ex- clusive of the socket. • Any piece broken from the spigot end of the pipe or fitting. (k) Stoppers. A stopper as shown on Standard Plan for Stopper shall be furnished 'with each Y or T branch.— (1) Branches. Branches shall be furnished with the connection or .connections of the size or sizes specified, securely and completely fastened to the' barrel of the pipe in the process of manufacture. This shall be accomplished by fusion during vitrifica- tion -of all sizes of salt-glazed'vitrified clay pipe and of unglazed vitrified clay ' pipe 18 inches or less in diameter. For unglazed vitrified clay pipe 21 inches or more in diameter, fusion during vitrification will not 'be required. However, in addition to ' other -fastening material of unit strength equal to the unit strength of the material of the pipe, there 'shR71 be a reinforcing collar of cement mortar around the outside of the joint, none of which cement mortar shall be exposed on the interior 'surface of the pipe. T branches shall have. their axes perpendicular to the longitudinal axis of the pipe. Y branches shall have their axis approximately 45 degrees. (unless otherwise specified on the plan) to the longitudinal axis of the pipe, :ieasured from the socket .end. All branches shall terminate in sockets and the barrel of the branch shall be of'sufficient length to permit making a proper joint when the connecting pipe is inserted_ in the branch socket. ' 12 F • -mow w�� R = w • i • •t • - (m) Hydrostatic Pressure and Loading Tests. • • 1. General. It ie the intent of these specifications that all.pipe used on the work shall meet the requirements of the hydrostatic pressure test and loading , test specified herein. , 2. Selection of Test Specimens. When required by the Engineer to be tested, the pipe shall be selected at random, not to exceed one pipe for each 400 feet or por- tion thereof of each size and class of pipe to be laid. The minimum number of speci- mens selected .for testing shall be 3 for each size and class of pipe. The specimens•vselected for testing purposes shall be sound pipe having di- mensions consistent with these specifications. . The lot or lots from which the test sariples are taken shall be sufficient to fill the entire.order for that size of pipe used in the work under the eohtract, and if they 'pass the tests shall be-so designated and•marked. 3. Hydrostatic Pressure Test. The hydrostatic pressure test shall precede the loading test by not less than one hour nor more than 3 hours and shall be applied to all the specimens received for test in each size and class of,pipe. When subjected to an internal hydrostatic pressure test of 10 pounds per . square inch for the time shown in the following table, the accumulated moisture on the exterior surface of the pipe shall not run down the sides in such quantity that it will • exceed 10 milliliters. TABLE FOR TESTING TILT FOR PIPES Thickness of Barrel Testing Time Inches _ Minutes Up to and including 1 7 Over 1 and including l 9 Over 1Q and including 2 12 Over 2 and including 2f- . 15 Over 22 and including 3 18 Over 3 21 4. Loading Test. The loading test shall be either sand bearing or 3-edge bearing. The loading test shall conform in manner to that specified in A.S.T.M.Std. Spec. C 13-44 T for the type of test selected for testing. Pipe shall withstand the following loads, each for its respective size and class and for the type of test imposed. • • • ' r • STANDARD STRENGTH PIPE Minimum Test Loads - Pounds per linear foot Size 3-Edge Bearing Sand Bearing Loading Test Loadinq_ Test 12 in. 1590 2280 EpTRA STRENGTH PIPE • Minimum Test Loads - Pounds per Linear foot Size 3-Edge Bearing Sand Bearing Loading Test Loading Test , 12 in. 2340 3350 The net inside length of the pipe from the base of the socket to the spigot end of the pipe shall be used as the divisor to calculate the load per linear foot. ' 5. Acceptance or Rejection on Result of Test: If more than 10 per cent of the specimens tested fail to meet the requirements of• the test, then all of the pipe in the lot, shipment, or delivery'corresponding to the sizes and classes so tested shall, • be rejected. If, however, 10 per cent or less of the specimens tested fail to meet the requirements of the test, Or if not more than one specimen fails to meet the requirements of the test when the number to be tested is less than 10, then a second. sele'ction of pipe 'shall be made for that test. The number of specimens to be tested in the second. selection.6f pipe,shall be 5 for each specimen of the first selection that failed to meet the requirements. If 90 per cent or more of the specimens tested, including those first tested, meet the requirements of the test, all the pipe in the lot, shipment, or delivery cor- responding to the sizes and classes so- tested shall be considered as complying with that test; otherwise all pipe of these sizes and classes shall be rejected, The Engineer mai, use such means .as he may elect to assure the delivery of that pipe, and that pipe only which has been designated, marked, and passed the tests. • • td • • •SEYER SOINT COMPUVD Specify---Jointing Materials: The contractor shall furnish all materials required for joining the vitrified clay pipe. The pipes shall be joined by caulking with dry oakum, jute or other suitable material and by pouring and filling the annular space be- tween bell and spigot with a coal tar compound. The compound shall comply with "Speci- fications 'For Clay Pipe Jointing Compound, C.P.I.-2", `for the Pacific Coast Clay Products Institute. Making The Joints---The pipe shall be firmly pressed home .so it is properly seated and butted. Then the joint shall be caulked so that pipe is lined up and centered leav- ing sufficient annular space completely around the pipe to receive the compound. Close the bell with running rope, hose or gasket, leaving a pouring gate at the top. Heat the compound in a clean kettle to a temperature that will secure maximum adhesion, ap- proximately 350° F. in warm weather and approximately 450° F. in cold weather, and pour it into the gate so it will run completely around the pipe and solidly fill the bell. Directions for Use=--Bitumastic Joint Compound CPI-2 is melted for use. Split the drum lengthwise with an axe and fold it back flat and the sheet of metal will serve to keep the Compound out of the dirt. Chop the Compound into chunks. Small amounts may be melted in a riveted or welded bucket and large amounts are melted in regular tar ket- tles. Kettles should have smooth round bottoms without pipes or other obstructions in them. Kettles should be clean and free of all other materials. Stir the Compound in the kettle and keep it mixed while it is being used. When the Compound is liquid and ' of easy pouring consistency, draw it from the kettle into buckets, pitchers, pouring cans or ladles, and pour into the pipe joint. As melted material is taken out of the kettle, fresh cold Compound is added to maintain "the supply. if work is interrupted, lower the heat on the kettle so it will not be hardened too much by over-cooking. Keep the Compound, kettle and pouring containers free of dirt or foreign matter. When the pouring containers become caked with cold Compound they can be immersed in the kettle , and "boiled out". 0 Caution---When liquid, Bitumastic Joint Compound CPI-2 has a temperature above the boiling point of water, so be careful if the ditch holds water. Do not use containers that are made with solder. Tear gloves and proper-shoes to protect yourself in case of accidental spilling. Keep the kettle and hot Compound away from children. If the smoke irritates the skin, protect the face with an unguent or cream. If the Compound catches • fire due to flames reaching the top of the Compound, smother the fire with a cover. TESTS F+`OR LEAKAGE IN SE MS (a) Unless excessive ground water is encountered, each section of sanitary sewer, between two successive structures, shall be tested by closing the lower end of the . sewer to be tested and the inlet sewer of the upper structure with stoppeIrs, and filling; the pipe and structure with water to a point 4 feet above the invert of the open sewer in the upper structure, or to a height of 10 feet above the invert of the sewer in the lower structure, which ever gives the least hydrostatic pressure on the lower structure. Where the difference in elevation between the invert of the upper structure and the invert of the lower structure is more than 10 feet, no test need be made. (b) The allowable leakage will be computed by the formula: D = 0.0002 L rr H Where: D is the allowable drop in feet per minute in-height of water in the upper structure. L is the length in feet of the sewer tested (does not include the length of house connections entering the section being tested) . H is the difference in elevation, in feet, between the invert of the closed sewer in the lower structure and the surface of the water .in the upper struc- ture or'the head of water on the invert at closed 'end of sewer. (c) If the leakage, as shown by the test, is greater than allowed by the formula, the pipe shall be overhauled; and relaid , if necessary until the joints shall hold satis- factorily'under 'this test. All tests must be completed before street or trench is re- surfaced. • • • • • . • • TESTS FOR FILTRATION (a) If, .in the construction of a section .of the sewer ,between structures, excel- , _ sive ground water is encountered, the test for leakage, described in 'Tests for Leakage in Sewers , shall not be used, but instead, the end of. the sewer at the upper structure shall be closed sufficiently to prevent the entrance of water; and pumping of ground water shall, be discontinued for at least 3 days after which the section shall be tested for infiltration. The infiltration.shall not exceed 2/10 gallon per .minute, per inch of diameter, per 100b feet of main line sewer being tested and 'does not include the length of house connections entering that section, :'here any infiltration in excess of this amount is discovered before completion and acceptance of the sewer, the. sewer ' shall be imane6iately uncovered and the amount of infiltration reduced to a quantity within the specified anount before the sewer is accepted. Should, however, the infil- tration be less thanythe specified amount, the Contractor shall stop any individual leaks that may be observed, when ordered to do so by the Engineer. (b) The Contractor,shall at his own expense, furnish all materials for making the tests required under direction of the Engineer. (c) All tests riust be completed before street or trench is resurfaced. • • • • t .7 y „aver a +�+ r 1 a�� rr a��n.rnea��m - e. - • e . C a 4M. MANHOLES, DROP M NHOTF.S, JUNCTION CHAMBERS (a) These structures shall be of the material as designated on the plans and ' shall be built into the sewer at the places shown on the plans and shall conform in . . size, shape and details to the standard plans. (b) Pipe stubs for future lateral sewers shall be built into the structures as shown on the plans, the outer ends to be closed by a clay stopper, tightly sealed in place. In laying pipe up to structures, no pipe shall be allowed to project beyond • the inside of the wall of the structure and in no case shall the bell of a pipe be built into the wall of a structure. • • • • • • • f P • • ADDI3'IMAL'170 , If, in the jud_went of the Engineer, it shall be necessary, because of conditions disclosed after a partial pertornance of the work which did not _ appear and could not with reasonable diligence and cost be ascertained in advance, or in any contingency which reasonable care and consideration could not foresee, to furnish and place con- Frete encasements for pipe joints, to furnish and place concrete encasement not shown or indicated on the plans; to place gravel or crushed rock under the pipe, because of soft, wet, spongy or unstable conditions in the bottom of trenches which renders the bottom of said trenches unsatisfactory as a bed for the pipe, then when said additional work and materials are required by the Engineer, they shall be furniS#ed and performed by the Contractor and shall be paid for under the contract at the unit prices set • forth in said contract; provided that this shall apply only where unit prices for ad ditiona.l work are included in'the proposal. • • • • Y CITY OF CHULA VISTA•. • DRAWING N0. I<-49-3 PROPOSAL OR BID Date: August , 1949 • TO THE HONORABLE CITY COUNCIL OF THE CITY OF CHULA VISTA OF THE COUNTY OF SAN DIEGO - • .STATE OF CALIFORNIA • In compliance with the Advertisement for Bids, a copy of which is hereto at- tached, the undersigned, having carefully examined the location of-the proposed work, and the Plans and Specifications therefor, prepared by the City Engineer'of the City of Chula Vista, do/does hereby agree to perform and to construct and com- plete ready for use, , • The "3" STREET SEWER, to be located in the City of Chula,Vista, as described in the said Advertisement for Bids for the City of Chula Vista, draw- ling number L-49-3, and to furnish all labor, materials and equipment, all in strict accordance with'the said Plans and Specifications therefor, to the satisfaction and under the supervision of the said City Engineer, at the following prices, which in- clude the California State Sales Tax, Bonds, Insurance and all other costs inciden- tal to this contract:-- , Item No. 1. For twelve (12) inch standard strength vitrified clay pipe sewer (approximately 1,020 linear feet) , complete in place, including all necessary Y branches, T branches, sewer joint compound for pipe joints and all labor and, mater- • ial necessary to excavate the trench, place the pipe, backfill the trench, restore the street surface, and all other work necessary to give ,a finished result, the r sum of ' • ($ ) per linear foot. (words) (figures) Item No. 2. • For twelve (12) inch extra-strength vitrified clay pipe sewer (approximately 140 linear feet) , complete in place, including all necessary Y branches, T branches, sewer joint compound for pipe joints and all labor' and ma- terial necessary to excavate the trench, place the pipe, backfill the trench, re store the street surface, and all other work necessary to give a finished result, the sum of ($ ) per linear foot. (words) (figures) • • • • • • o r Item No. 3. For four (4) Precast Reinforced Gement Concrete Sewer Structures designated as Standard Manhole on the plans, complete in place, including all ex- cavation and backfill, restoring of street surface; also all material and work incidental thereto, the sum of ($ ) eqch. words) (figures) Item No. 4. For Class "B" Concrete Reinforcement of 110 linear feet of twelve (12) inch sewer pipe as shown on plans and profiles complete in place, the sum of ($ ) Per lineal foot. (words) • (figures) Aivowifr Zo Item No. 5. For steel encasement of linear feet of twelve (12) i inch sewer pipe as shown on plans and profiles, complete in place, the sum of ($ ) Per lineal foot. (words) , (figures) The Undersigned further agrees that if he is notified of the acceptance of this proposal within thirty (30) days from the time set for the opening of the bids he will execute and deliver to you within five (5) days after having-received written notification, a contract as called for in the notice to Contractors and to complete the contract in 60 calendar days from and after date of executing the contract.- The Undersigned further agrees that the enclosed certified or cashier's check' , or Bidders, Bond payable to the City Clerk of the, City of Chula Vista, in the amount of ten percent (10%) of the total bid or bids which the Undersigned has • submitted shall be forfeited in case he fails to execute and deliver the contract as called for. Any alteration or addition to form of proposal, which qualified the bid, will 1 • invalidate same. Receipt is acknowledged of Addendum No. and it has or they have • been considered in the proposal. Contractor's License No. issued on , has not • been revoked. Signed this' day of , 19 Contractor _. Address and Telepizone -No. I 5 u 'en., ,• mo Y' J 'BOAR FOR MATERIAL. AND LABOR ' 4 - , i F ' KNOW ALL MEN BY THESE' PRESENTS; That I/We.` • V , , 1: r $ ' • ` the contractor in the contract hereto annexed, as principal, and • v AS SURETY, are'held and firmly . '-'s..bound. unto the CITY OF`•CAULA VISTA, a municipal' corporation, located in San Diego `i - , eitulity;, California; in the sum of Dollars - ( : ), lawful money,'of the United States, for which payment, well' .W and truly to be made, bind ourselves, jointly and severally firmly by ' these presents. . . . Signed, sealed and dated ' - The condition of the above obligations is that is saFid•principal as contrac- tor in the contract hereto annexed', or his :fir its,fuboontractor, fails to pay for •.e1ry material, provisions, provender, or other supplies, 'or teams, used in, upon, for or about the performance of the 'work contracted to be done,by said contractor," namely to furnish all tools, equipment, apparatus, facilities,•, transportation, - - ` • labor, and material, other than material, if any, agreed to be furnished by' the . City, necessary to perform and• cpmplete, and to perform and complete in a good and . workmanlike manner,„the work- of-- ' "r” STREET I SEWER * �. in*strict conformity with the terms and conditions set forth in the contract here--: d ,= ' to annexed, .or-for any work or labor done thereon•'of. any kind, said surety will • pay the ,same in an amount -not exceeding the sum hereinabove set forth,' and also it- .. . case suit is brought 'upon this bond, a reasonable attorney's fee to be fixed thy_ _ the courts. This bond shall inure to the benefit of any and all persons, companies, .. • . . and corporations entitled to file claims under andby virtue of the provisions of an act of the Legislature of the State of California enti'led, "An Act to secure , ` ' the payment of the claims of persons :employed by contractors upon public works, and : • ' - tfie claims of persons who furnish, materials, supplies, -tuns, implements or machinery used or. consumed, by:such contractors in the performance o':such works, and prescrib ' * .. ing the duties 'o f certain public :officers with respect thereto", approved May 10th,' 1919, as amended; and the said surety, for value received, hereby stipulates and ,' agrees that no change, extension of time, .alteration a.,-addition to'the terms .of . the contract or to. the work to be performed thereunder o +-.the specifications ac- - companying the same shall in any wise ;�,ffect 'its obligations on this bond, and it • , • dbes hereby waive notice, of such `Changes , 'extension of time, alteration or ad- • , dition to the terms of tine• contract or•'to. the'work or to the specii' .,cations. - . 1,- yy • a 9 • ,_ Contractor. . - '. " • Surety. Approved as to form: ' - ' ' . 4 Cfty .Attorney. . ' • - ' . '4 • • • - I. • . • • BOND OF FAITHFUL PERFORMANCE MOW ALL MEN.BY THESE PRESENTS, That I/We the contractor in the contract hereto annexed, as principal, and AS SURETY, are held and firmly bound unto the •CITY OF CHtULA VISTA, a municipal corporation, located in San. Diego County, California, in the sum of Dollars ($ ), lawful money of the United States, for which payment, well and truly to be made, we bind ourselves; jointly and sever- ally, firmly by these, presents. • Signed, sealed and dated The condition of the above obligation is that if said principal as contractor in the contract hereto annexed shall faithfully perform each and all of the condi- tions of said contract to be performed by him, and shall furnish all tools, equip- ment, apparatus, facilities, transportation, labor, and material, other than mater- ial, if any, agreed to be furnished by the District, necessary to perform and com- plete, and to perform and complete in a good and workmanlike manner, the work of--- "J"' STREET SEWER in strict conformity with th'e terms and conditions set .forth in the contract hereto annexed, and shall pay or cause to be paid all persons who perform labor, for, or furnish materials to, said contractor, or to any sub-contractor, in.the execution of. said contract, then this obligation shall be null and void--otherwise to remain in full• force and effect; and the said surety, for value received, hereby stipulates and agrees that no change, extension of time, alteration or.addition to the terms of the contract or to the work to be performed thereunder or the specifications accom- panying the same shall in any wise affect its obligations on this bond, and it does hereby waive notice of any such change, extension of time, alteration or addition to the terms of the contract or to the work. or to the specifications. • Contractor. Surety. • Approved as to form: • • City Attorney. • • • • • ' fR • AGREEMENT THIS AGRaaMENT, made and entered into this day of 1949, by and between the CITY OF CHULA VISTA, State of California, hereinafter called • the OWNER, and ' • hereinafter called the CONTRACTOR: the City Council is hereinafter called the • COUNCIL. WITI?ESSETH FIRST: That the CONTRACTOR, in consideration of the promises of the OWNER hereinafter set forth, hereby agrees to furnish all tools, equipment,- labor and material necessary to perform and complete and within 60 days, from and after the, date of execution of this contract, to perform and complete in a good and workman- like manner, the work of constructing and erecting complete and ready for use: • SANITARY SEWERS IN "J" STREET, according to the • plans, profiles ,and specifications, prepared by The City Engineer, which Plans, Profiles and Specifications are here- by referred to and made a part of this- contract. SECOND: That it is agreed that said tools, equipment, labor and material shall be furnished, and said work performed and completed as required in said plans and specifications under the direction and supervision and subject to th'e approval of the Engineer of the Owner. THIRD: That it is further agreed that in the event that said Contractor fails to furnish tools, equipment, labor and materials in the necessary quantity or quality, or fails to. prosecute the work contemplated by this contract in a ' diligent and workmanlike manner, the Engineer may so certify to the Owner, and if thereafter said Contractor,, for a period of five days after receipt of written demand from the Owner so to do, fails to furnish tools , equipment, labor and materials in the necessary quantity and quality, and to prosecute said work in a diligent and workmanlike manner, or after commencing so to do, within 'said five days dr at any time thereafter fails to continue so to do, then the Owner may ex- clude the Contractor from the premises and take possession thereof, together with all material and equipment thereon, ,and may complete the work contemplated- by this contract, either by furnishing the tools, equipment, labor or materials"neces- sary'therefor, or by letting the unfinished portion of the said work to the lowest responsible bidder therefor, or by a combination of such methods. In any event, the procuring of the completion of said work shall be a charge against the Contractor and may be deducted from any money due or becoming due from the Owner, and if' the sums due under the contract be insufficient, said Contractor shall pay to said Owner the amount bf said charge or the portion thereof unsatisfied. If the Contractor uses any material and/or supplies and/or any tools or equip- ment belonging to the City of Chula Vista or any departmeht thereof; other than that provided for in Said specifications, the reasonable value of such materials and/or supplies and/or the rental values of said tools and/or equipment while in the possession of said Contractor shall be paid to said Owner by said Contractor, and may be deducted from any sum or sums due or to become due to said Contractor under this contract. The value of such material and/or supplies and the amount -of rental of such tools and/or equipment and all damage thereto as aforesaid shall be ceterminedlby the Engineer, whose written decision shall be final. FOURTH: That this contract shall not be assigned without the consent of the Owner first given, such consent to be either in writing duly authorized or by re- solution entered on the minutes of the City Council of Chula Vista, California. • • • FIFTH: That the Contractor agrees to save, keep and bear harmless the Owner and all officers and agents thereof from all damages, -costs or expenses in law or equity that may at any time arise or be set up because of damages to property or • of personal injury received by reason of or in the course of performing .said work, which may be occasioned by any negligent act or omission to act which amounts to nekligence upon'the part of the Contractor or any of _ employees, or my subcontractor performing any of the work contemplated by this contract, or by reason of any infringement or alleged infringement of the patent rights of any person or persons, firm or corporation in consequence of the use in or about the said work of any article or material supplied or installed under this contract; and it is further agreed that the owner shall not be liable or responsible for any accident, loss or damagehappening •to the works referred to •in this contract ' prior to the completion and acceptance of the same: • • SIXTH: That it is further agreed that no laborer, workman or mechanic in the employ or under the direction or control of the contractor_ or any subcontractor do- ing or contracting to do any part of the work contemplated by this contract shall be required or permitted to labor more than eight hours in any one calendar day, except in cases of extraordinary emergency caused •by fire, flood or danger to life • or property; and it is further agreed that the said Contractor shall forfeit to . the City of Chula Vista the sum of Ten Dollars (320.00) for each laborer, workman • or mechanic employed by or by any subcontractor under in the exe- cution of this contract for each and every calendar day during which such laborer, workman or mechanic is required or permitted to labor more than eight hours in vio- lation of the provisions of Sections 1810 tct 1817, inclusive, of the Labor Code of California. SEVENTH: It is agreed that the Contractor or subcontractor doing or contract- ing to do any part of the work contemplated by this contract shall not knowingly ' employ'on said work any alien except in cases of extraordinary emergency caused by fire, flood, or danger to life or property, and it is further agreed that the Con- tractor shall forfeit to the City of Chula Vista the sum of Ten Dollars 010.00) , for each alien employed by • ' or by any subcontractor under in the execution of this contract for each and every calendar day or portion thereof dur- ing which said alien is knowingly employed or caused or alldwed to be employed. The Contractor further agrees to be bound by and to comply with all of the other provisions of Sections 1850 to 1854, inclusive, of the Labor Code of California. EIGHTHW The following rates of per diem wages have been ascertained by the - Council to. be the general prevailing rates of per diesri wages for the work contem- plated by this contract. • Pursuant to the provisions of Sections 1770 to 1777, inclusive, of the Labor . Code of the State of California, the City Council has ascertained the general pre- vailing rate of per diem wages, and the prevailing rate for Saturday, Sunday, legal • Holiday and overtime work, for each craft.or type of workmen needed ta execute the proposed contract, and has adopted a wage schedule, and it will be required that not less than said rates be paid to all such work. The following schedule contains only those items of the adopted and amended wage scale which are applicable' to the sewer improvement work; those which are not so applicable have been omitted. FOREMAN - All Foremen not herein separately -classified shall be paid not less than ;1.40 per day more than the journeyman rate for the craft involved. • APPRENTICES - May be employed in conformity with Section 1797.5 of the Cali- fornia Labor Code. Title of Position Hourly rage Rate Legal holidays, including Sundays and Saturdays where crafts work a five-day week, and other overtime when permitted by law, to be paid for at the rate of time and one-half. r 3 -_ , . Classification - S f> 8-lir.. Day Hour' ' ' ' • Laborers; General or Construetjtii,, including 0: . " • - • ' , all laborers not herein separately clas- ' - `'" ! ,7 sified"on all types' gf..eonsfuuetion . . ' .' •' 3.57 • Laborers, Operators_,and Tefiders of ;pneumatic y'_ { an4 electric tools, vibrating machine ',and ' - `s similar' iechanical tools not separately r 2' - ?' ;'4 d classified herein .y , . '1.77' ,t. Laborers,: Special -- ` r : Cutting torah Operator . . . . . . • • . `.' 1:40 • • "` ,• Concrete Curer , ' 1,55. ', Pipeline laborer •,, '.' . •. 1.36: ' . ` , , • Tractor Operator, 101J.dozer, ,etc. . . . . . ' 2.12 - • -, Trenching Machine Operator ,2.20 • . Truc ,Driver -•'Less than 6 tons' 1.65 Water Truck Drivers - 2500 gal. or more , . . . . 1.82 "`~ . Sewer, Pipe sayers g, 1.87 , - - Sewer Pipe Caulkers 1.75 . . w • NINTH;. The Contractor further agrees to comply with Section 1735 of the `-,-° : labor Code'of California, relating tq 3io t.Dis'crimination in employment", and ' with all other provisions of the Labor. Code of California applicable to Puglia , ' Works. . Section 1735 reads as follows: • "No discrimination shall be Made in the employment or , . ,R• 4" ' x• persons upon .public works because of the race, color •• or religion of such persons, and every- contractor for , . , public.works violating this section is subeet.to all' - the penalties imposed for a, violation of this ciapter." . . '• TENTH: It is agreed that, in 'accordance with Chapter 4., Division 5, Title • 1, Government Code of California, only such unnianufactured arti'dlesv-materials,, . and supplies ae have been produced in Ate United States; and only such manufac o• to red articles•,' materials,, and supplies as have bee ,manufactured in the United States, •lubstantially all from articles, materials, and s{tplies mined, produced, °; or so manufactured,' as the ,case may be, in the United,States., .•shall be used in . the performance 'af,this contract., The references to the United States herein „,, x _• shall, be construed 'tq'mewl°the.. United States of America and inetude any territorpk or insular possession 'thereof. -' • ' • I . 1 y a . ..:4,, . ELEVENTH: ,�That,4t�is,ftither agreed that the Contractor has filed herewith a good and sufficient•-bond in-the sum of-not less than One-half.of the amount pay_able,. by the.--terms-of this contract to secure the claim of materi'almen, mechanics, and . laborers employed by_him ..in the performance of this contract,and any and all amend- ' - ments thereof, and 'a`bond in an amouht of not less than one-half of the amount pay- pay- able- by the terms of this contract for the faithful performance- of the terms, and conditions of this oontract,. and any and all amendments thereof; and Said Contractor *' ' agrees that should the sureties on said bonds, or either of them become. insufficient, said- Gontractor will••rene* said bond or bonds with good and sufficient sureties withb in ten days after receiving, notice from the ot*ner' thatjaid sureties in its .opinion °» A- "� are insufficient, and fors failure' so`•to do the Owner may declare this contract . forfeited. - 4.- ' , , T1ELTH: That the dWner agrees, in consideration of thte ,perfor once-of this contract; to pay ,Go saidContractor, and the Contractor agrees to accept in full satisfaction for the work done hereunder, the following .amounts•c,, . it .. ' .. - k, s - 4 i •. .• 5 The Owner agreep: to pay and the'Contr ctor agrees to!accept in full payment for the work to be done, et the follaEl ng unit ,prices to-Wit:- • •,," IteM No.41. 'Fdr'twelve (12) inch standard strength vitrified ...clay pipe sewer - approximately 1;Q20linear feet) , complete in .place, inelt�ding all'_necessary ,Y , branches, T brandies, sewer joint compound for pipe joints A.nd''a11.labor and Mater- ial necessary to excavate the trench, place-the pipe, -bickftil the trench, 'restore the street surface, 'and 911 other work necessary to give a finislied•.resuit, •; heu>p ` of - - ' , per, linear foot. . , . , • • ., K " • Item No. 2. For twelve (12) inch extra strength vitrified clay-pipe sewer (approximately 140 linear feet) , complete in place, including all necessary Y branches, T branches, sewer joint 'compound for pipe joints and all labor•and ma- terial necessary to excavate the trench, place the pipe,•backfill the trench, restore the street surface, and all other work necessary to give a finished result, the sum of per linear foot. . Y Item No. 3. For four (4) Precast Reinforced Cement Concrete Sewer Structures designated as Standard Manhole on the plans, complete in place, including all ex- . ' , cavation and backfill, restoring of street surface; also all material and work,in- cident4 thereto, the sum of _ each. Item No. 4. For Class "B" Concrete Reinforcement Of 110 linear feet of twelve (12) inch sewer pipe as shown on plans and profiles complete in place, the sum of • per lineal foot. • 7`Ati.0/7ty za Item No. 5.' For steel encasement of tom) linear feet of twelve (12)4 'inch sewer pipe as shown on. plans and profiles, complete- in place; the sum of { • per lineal foot. On or about the first day of "the month next.following the commencement of • the work, there shall be paid said Contractor a sum equal to ninety pet cent (90g , of the value of the work completed since the commencement of the work, and there-' after on or about .the first day of each successive month as the work progresses j similar paymehts shall be made equal to ninety per cent (90%) of the value of the work completed since the commencement of the work, less all previous payments. The final payment, if unencumbered, or any part thereof unencumbered, shall be made thirty-five (35) days after the acceptance of the work by the said Owner. Said payments .thall be made by demands drawn in the manner required by law, ac- companied-by a certificate signed by the Engineer, Otating that the work for which payment is demanded has been performed in accordance •with the terms of the Contract, and that the amount stated in the,certificate is due and er' the terms of the Con- . tract. Partial payment on the 'contract price shall not be considered as an ac- • ceptance of any part of the work. It is further agreed by and between the parties hereto, including the surety or sureties on the bonds attached to this contract, that in the event it is deemed necessary to extend the time of completion of the work contemplated to be done under this contract, said extension may be granted by the Council, 'end shall in no .. way affect the validity of this contract or release the surety or sureties on the bonds attached hereto. That it is agreed that if any additional work shall be done under the terms • of this contract 14 order of the Engineer, for which a unit price has been bid as hereinbefore .set forth, the Owner, shal l pay the Contractor an additional amount in accordance with the terms of said unit price bid, as set forth a) ove; and if any work to be done under the terms of this contract for which a unit price has been•bid shall be omitted by order- of the Engineer, then the sum or sums to be paid said Contractor under .the terms of this contract shall be reduced because of said omissions in an amount to be determined by multiplying the unit price bid for said work, ,as set forth above by the number of units of said work omitted. . THIRTEENTH: Time is of the essence of this contract and if the Contractor fails to complete the work required by this contract within the time herein fixed, the Contractor shall become liable to, and shall pay the Owner all costs of ad- ditional supervision and/or inspection as shall be caused by the failure of .the Contractor to complete the work within the time herein .specified. IN WITNESS WHEREOF, the said Owner has executed these presents by causing them to be subscribed by the ?;ayor of Chula Vista and the seal of said City to ' be affixed and attested by the clerk thereof, and said Contractor has executed these presents the day and- year first above written. CITY OF CI3tULA VISTA, CALIFORNIA By Mayor of the City of Chula Vista. • A. A • • Z .y4 ••••• r +p ! ,,,,j• aFw ., 1 • • • . . y . HERBERT _V. BRYAFT, City Clerk , yti1. +t. , •• - t . r, . ■ • " ;1 4• - • - , •k ' Contractor, • ir �: ♦ ' • Ji 4 - . • • 1 - • • , • 1 ._ .,:n _ . 544 o Ya • R41••r 414"... • - ,n e .