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Construction. and. Operation Notes
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<br /> PROPOSED E TEF E d hR ITtE CONSTRUCTION CThATtES OPERAMON AND MAINTENANCE
<br /> 'This section describes the proposed wastewater facilities which include conveyance of The implementation of the temporary wastewater, storage tanks and associated surnp and Operation of the wastewater holding acid primping facilities will consist of the folt awing;
<br /> wastewater throughout the facility, wastewater storage, and pumping and off-site disposal piping will consist of the following construction activities:
<br /> operations. � Wastewater, collection: Wastewater will be; collected in PVC pipes from plumbing
<br /> Demolition of existing (abandoned) water treatment building on northwest corner of fixtures and floor drains and transported to a nearby surnp under gravity flow
<br /> Figure 1 shows the site plan with existing facilities and the proposed locations, of the new property conditions,
<br /> sump and storage tanks defined in this report. Figure 2 provides a flow schernatic of the new The wastewater surnp, will contain two (2) grinder type pumps that will operate by
<br /> polyethylene tanks, the existing JVCrflahtanks, the odor scX1>3EC, and the a ssCGlatfC [:)iplrg CCIIhGtiCi of soil S�rY .1e r1fg?Ctelhrlc31 investigation to C 'ter"T1.ne bearing C �� �clt� rneens of water float switches to )tIM 7 wastewater to a rF) �}hCf�- f'o
<br /> U1d hiC„.Idli1g
<br /> being proposed for a temporary storage tank system. The locations of new facilities are of the soil tank,
<br /> approximations and are subject to change pending a detailed site survey. Topographic si..irvey of site to set elevation control points and establish base flood The Ievei in the holding tank will be monitored by Lost Isle Resort ernployees `ay
<br /> elevation level means of an integrally rnounted sight glass orr th1e outside of the trunk.
<br /> Pre-load tank sites with excavated sail from other sites at the resort-- Load sites at 1.C; An overflow outlet will allow for 'flows exceeding the capacity of the primary tank to
<br /> Conveyance Systema tirnes the estimated load to be seen under tank full conditions move to a secondary storage tar}k.
<br /> C liar and grub vegetation and topsoil from tank and foundation sites
<br /> Wastewater will be conveyed by gravity through new and existing 4-inch diameter Schedule 0 Install erosion control fencing and tubes as needed
<br /> 00 PVC pipers from various locations around the Lost Isle Resort to a be=low-around purnp a Place imported structr,iral soil An electric subrnersikal(:; mixer set in the prirnary and secondary will be used to mix.
<br /> station. Floor drains in the bar, kitchen and bathrooms will combine with drains from sinks [dace structural steel Supports as needed the contents of the tank periodically and prior to eirptyirig to prevent solids from
<br /> and toilets to convey wastewater generated on site to a new pump, station designed to 0s collecting in the bottom of the tank, fie mixer will be turned on for dg -7 90 secondsF Place reinforced concrete tank fourldaatic�n pads(cor�rcrete will be raaixed oil pito,)
<br /> reliably convey these flows as described below, prior to emptying the tank to keep the drain linea frorn plugging. These mixers will be
<br /> 0 Place force main frorn sump to storage tanks manually started by a focal starUstop switch.
<br /> All gravity transmission pipes will have glued fittings and will be installed according to industc 0 Egan electrical service to equipment
<br /> J y p p g � g Y The, temporary storage tanks will be emptied by a local, licensed septage haule:.r.
<br /> standards. The pipe trenches will be backfilled with screened, naive material with care taker} 0 Place surnp arid mumps
<br /> This septage; hauler will be a contracted hauler witl-r a boat-rnounf:ed puranp and
<br /> to riot allow large rocks or foreign material in the pipe gone that may damage the pipe during, a Place storage tanks and associated piping and mixers
<br /> storage tank or a truck with pump and tarok that is ferried across the river ora a barge,
<br /> or after installation. The gravity :;sewer pipes will be installed with a rninin"rum slope of 21il0 0 Wire equipment or a combination of the two. The septage har,iler will be responsible for contracting
<br /> dawn to the pump station. Is bill sump with well water for testing of system with a local wastewater treatment plant for accepting the wastewater pumped from
<br /> 0 Test surnp pumps, mixers and piping --check for leaks the site.
<br /> Overflow lines frorn tank to tank will be constructed of glued PVC pipe and fittings, Flanged * Commission system 'The septage hauler would be able to access the tank from the SI-eriffs dock arad
<br /> outlets on the polyethylene,tanks will be integrally molded. 0 Restore topsoil to areas affected by excavation and construction activities extend a hose to the tank discharge on the island. A valve ora the tank discharge linea
<br /> 0 Keep erosion control in place until vegetation has been re-established will prevent the tank frorn draining freely to the ground
<br /> Wastewater Pumping and Storage The septage hauler will be notified prior to peak events and the, expected volurYae of
<br /> pwastewater to he pumped and will kaon responsible for deatera-nining travel timess arid
<br /> Wastewater collected from, the Lost Isle Resort will conveyed to an intermediate, pump effectively maintain capacity in the systema
<br /> ataticar��1. The pump station will consist of a below--ground 750--gallon tank and two, ABANDONMENT E EXISTING TREATMENT T ENT SYSTEM haul distances to e
<br /> submersible primps. Each pump will each be sized to transmit the peak anticipated flow from The existing septics systema abandonment plan has been addressed in other documents and
<br /> the wastewater collection system to a secondary above-gror.ind holding tank. Two is not discussed in this report. A groundwater monitoring plan for the existing leachfield will
<br /> submersible pumps will provide 100% redundancy in wastewater pumping capacity at timers be developed as a separate document and submitted to the; Regional Water Quality Control
<br /> of peak flow in the event of a pump failure;. Board for- review. Gravity sewer pipes will be inspected for functional Integrity and re-used,
<br /> where possible, in the Improvements Project described herein. Existing pipes that are
<br /> D urrip operation will be controlled by a level switch attached to _a float in the pump station, damaged or otherwise notfunctioning optimally will be replaced with new pipes,
<br /> Leval set-points in the purnp station will include the following:
<br /> • Lead pump start
<br /> • Lag pump start
<br /> Lead pump stop, and
<br /> Lag pump strap
<br /> In addition to pump control, the floats will provide the following visual and audio alarms:
<br /> 0 1 o surnp alarm
<br /> W Hight surnp level alar-rn (lag purnp start)
<br /> High-high sump level •lama (at a minimum of two fecal freeboard in the surnp)
<br /> A local control panel with alarm beacon and horn will be installed near the sr.rrnp for control of
<br /> the pumps.
<br /> Wastewater purnped frorn the far.arnp station will be transmitted through a 3-inch diameter,
<br /> Schedule 80 PVC; farce main to an above-groe.ind 7,000 gallon temporary holding tank
<br /> located on the southwest corner of the Lost Isley property. A second '7,000 gallon temporary
<br /> holding tank will be installed and used in the event that the first tank does not have the;
<br /> capacity to contain the pumped flow. These t.ernporary holding tanks will be: constructed of
<br /> high-density polyethylene (HDPE) containing a UV resistant resin and will be covered tanks
<br /> with a PVC pipe venting the tank to the, atmosphere, A submersible mixer will be installed in
<br /> the tanks to keep solids from settling and fouling and to mix contents prior to their being
<br /> emptied. _t..he> mixer will be controlled manually with a local s,tartlscontrol
<br /> The primary wastewater storage tanks will be placed on a reinforced concrete foundation
<br /> sized appropriately for the tanks gross weight, wind load, and soil bearing capacity: Appendix
<br /> B of this report contains details of the storage tanks and foundation pads. The tanks will be
<br /> constructed so that the bottorn elevation of the tank is at least 1.0 feet above the.; 100-year
<br /> base flood elevation (13EE) that has been established in this, stretch of the Scan Joaquin River,
<br /> '7 feet above mean sea level (amsh,
<br /> EROSION CONTROL.
<br /> During construction stormwater will be controlled on site using standard construction
<br /> procedures for excessive silt and construction debris from entering the San Joaquin River-.
<br /> After completion of the construction project, rainfall will drain from the site by natural means
<br /> oared along natural swales to the rives. No stormwater detention is planned for the site.
<br /> Construction activities at the site will be confined to less than 1 acre of affected area and
<br /> would riot require an NPIDES permit from DWQ under order No, 90_,28-DVVQ.
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