Small landscaping crew active on upper area and entrance at Trent Point. Water line crew for separate project is also still active in the area.

Dry conditions, no trackout or discharges observed. New stormwater system is complete. Needs further inspection to assess revegetation status..

No correction requests at this time.

Washout has been dumped at end of paving on asteroid.
L2 doing some trench work on interstellar, looks like they are installing ads perf pipe.
Vortex is paved going down hill, curb and sidewalk completed, crew on site cleaning sidewalk.
Filter fabric removed from vortex pond, more riprap has been installed and flow areas reinforced with bigger rocks.
No water on site. Message sent to RP about washout, only issue at site.

post rainfall inspection
Trackout at vortex from sidewalk company.
No water in vortex pond.
Some water in reservoir, no dewatering.
East pipe discharge 52.3 NTU.
Flume NTU at JH yard 62 NTU.
Pipe under Warm Springs 12.5 NTU
Only issue at site is trackout, truck and trailer still at site.

Dewatering in progress. Pumping from plugged resevoir holding captured stormwater from last weeks rain events.

Conducted turbidity sampling at the discharge point of the unamed stream from the Mesa into Penitentiary Canal at Warm Springs Road:

Background water upstream in Pen Canal of discharge point at Warm Springs Road: 3.91 NTU @ 12:26 PM

Water in unnamed stream prior to discharge to Pen canal: 152 NTU @ 12:28 PM

Water downstream in Pen Canal after discharge: 47.6 NTU @ 12:38 PM (this is still in compliance being less than 50 NTU increase of background water)

Other measurements:

Water flowing from Pen Canal into culvert to ACHD pont 9.83 NTU

Water joining stream after passing through dewatering bag, passing through vegetation and controls installed was 104 NTU @ 12:51 PM

Water in site stormwater holding pond 171 NTU @ 1:03 PM
Water below dewatering bag 100 NTU @ 12:58 PM
Double check of water in bottom of stream prior to discharge to Pen Canal: 149 NTU @ 13:28 PM

The dewatering water is actually getting dirtier (more turbid) as it travels down stream picking up residual mud from previous runoff events and perhaps due to the steepness of this section of stream.

This inspection is a PASS because the background and downstream turbidity at the discharge point is less than 50 NTU and the dewatering water is clear to the naked eye where it is joining the unnamed stream and the system is effectively reducing the turbidity of the water from the holding pond, allowing for the discharge to continue.

Follow up inspection scheduled tomorrow with ACHD and Syman to conduct turbidity testing with different meters to compare results.

Follow up on dewatering set up and turbidity
Turbidity reading.
East pipe on dam 73.8 NTU
Creek at start of flume 73.8 NTU
Creek at exit pipe at JH parking area. 180 NTU.
Dewatering water above flume 187 NTU
Dewatering water below bag 248 NTU.

While on site I adjusted the hose by placing it further into the bag. The water than flowed through more of bag. After about 10 minutes NTUs out of bag dropped to 231.
Water exeting site is still to high from background, results in failure and illicit discharge.

Did turbidity sample on site. Meter is calibrated, certified by manufacture, and less than 30 days old.
Trent Point Inlet :146 NTU
Vortex inlet : 51.4 NTU
Vortex Pond Surface: 67.5 NTU
Vortex Pond Outlet: 104 NTU
Dame Face East Pipe:95.9 NTU
Dam Face West Pipe: 82.7 NTU
Creek Below Dam: 134 NTU
Flow Under Dewatering Bag from Reservoir Dewatering: 489 NTU
Flume where dewatering water joins creek: 262 NTU
Site is out of compliance. Water turbidity was 146 NTU in, 262 NTU out. Increase of 116 NTU.

post rainfall inspection

Monday 6/15 turbidity testing:

- background into vortex/Ridgepoint pond: 49.8 NTU
- Vortex/Ridgepoint pond outfall manhole: 81.5 NTU
- Site stormwater outfall to stream: 78.8 NTU
- Downstream below riprap: 71.6 NTU. The discharge at time of inspection was with water qualtiy limit and in compliance.

Observations:

- the corrective action taken by site to clean out all manholes and stormwater bypass system seems to have eliminated the issue of water entering the pipe from the pond and then stirring up deposited mud/sediment in each manhole junction.

- no significant issues observed in upper section of subdivision. Good vegetation, streets paved, silt fence and vegetated buffer perimeter
- stormwater running down Ridgepoint into the pond comes at too great of velocity and volume for the existing riprap spillway in front on the storm drain drop inlets. Erosion occurs on the spillway into the pond
- rilling has started to occur on the dam face and wattle maintenance is needed. No sign of any of the recent seeding application growing. Lots of dirt and mud has been deposited into the center rip rap. No sediment control at bottom end of dam above outfalls.
- Syman onsite for turbiditiy testing and results put in SWPPP
- dewatering out of plugged resevoir into upland vegetation has been approved. Request to place pump hose on pontoon to get top of water column, putting energy dissipation at hose outlet and direct water down existing draw. Did not request to attach silt bag at end of hose in worry of plugging and malfunction.

Correction request:
- schedule wattle mainteance and installation on dam. Apply temporary tacifier or re-seed with mulch.

Post rainfall turbidity testing conducted with site RP Steve and Syman Company

Prior to these samples, testing with Syman company found a descrepency between the two meters. See turbidity log in SWPPP for syman readings

3 point calibration on meter prior @ 12:05
20 NTU standard : 20.2 on meter
100 NTU standard: 95 on meter
800 NTU standard: 786 on meter

Water coming into Ridgepoint Pond from stormwater inlet pipe @12:09: 633 NTU* dirty from water line project uphill. Very low flow, from dewatering/water line break

Pond water near the Ridgepoint Pond outlet pipe 31.7 NTU

Water coming out of site final outfall before entering rip rap section & stream: 161 NTU (472 NTU less than dirty background water from Granite/Suez project; 129 NTU more than Ridgpoint pond surface water at outlet)

Downstream from site outfal rip rap 146 NTU

Ridgepoint pond water quality has been negatively effected by runoff from the Granite/Suez site. ACHD notified, should be responsible for cleaning out storm drains and replacing the geotextile, flushing the riprap.

However water for the Ridgepoint pond outlet does get dirtier by the time it discharges at the site outfall potentially due to water mixing in dirty sumps in manholes and/or a leakage of the plugged resevoir joining the bypass water flow.

Investigation in progress

Paving crew on upper section. Water truck is spraying road bed.
Crew working on sewer line coming down vortex.
Vortex pond is empty, newly installed geotextile already covered in dirt from utility work runoff coming from different project. Bare areas above pond and by inlet have been hydroseeded.
Crew working on grade below vortex heading to reservoir pond. Pond is now split into two bays.
Backside of dam has been hydroseeded. Very small amount of water coming out pipe and running down creek, is not turbid.
No dust but will need to be monitored and watered if needed.

Rainfall inspection. 9:45 AM- 12 PM.
Approximately 0.6-1.0" rain received on site within previous 24 hours. Muddy stormwater discharging at bottom of site

turbidity sampling @ 10 - 10:30 AM

Background stormwater turbidity going into pond:
- inlet pipe to pond 199 NTU
- gutter at Ridgepoint and Stone Ridge 102 NTU

Outfall and stream at bottom of site:
- In pipe from pond 661 NTU
- downstream 30 ft from end of riprap 642 NTU
- downstream before culvert to flume 696 NTU

* increase in turbidity attributed to mud and dirty stormwater already in pond due to issues on the separate water pipe replacement project runoff (permitted through ACHD)

Observed muddy runoff leaving main site entrance at Trent Point which does contribute to the runoff that flows into the Ridgepoint/Vortex pond (tested @ 646 NTU in gutter)

Significant flow of muddy water from the upper section of site flowing down the uncompleted Vortex Road and is being retained onsite in the resevoir/pond to prevent discharge of this muddy water offsite without settling/treatment. Pond appeared to be holding water and filling during the AM inspection.

Correction requests:
Prevent dirty water from running offsite at Trent Point entrance. Install sand bags and gravel bags to prevent water from running offsite and down gutter at and instead into the new DIs that keep water onsite. (task completed during inspection)
- more correction requests pending post rainfall. Still raining.

Reviewed SWPPP:

- Revisions made to SWPPP satisfy Boise ESC correction requests related to SWPPP.
- turbidity log is being kept in appendix L. Turbidity testing must occur during all rainfall event inspection.

Note: Inquiry on official WOTUS status of receiving surface water at bottom of site sent to IDEQ and EPA on Monday 5/18, waiting for response.

Post rain event turbidity testing

Background water samples flowing into pond
- from pipe flowing into pond 488 NTU
- water coming out of pipe from new DIs on Ridgepoint 997 NTU
- water in gutter upstream at Coloma & Stone Point 960 NTU

Discharge samples
- Ridgepoint pond outlet pipe 127 NTU
- Outlet pipe for water from existing subdivsion draining from lower Ridgpoint 52.7 NTU
- downstream from rip rap outlet controls 174 NTU
- water in flume 177 NTU


Source of turbidity in the background sample is road work from Granite Excavation for Suez pipe replacement. Not related to this project. Has ACHD and CGP SWPPP coverage, no City ESC permit due to being ROW. Notified RP Rhett with Granite and ACHD inspector. Issued verbal corrections to provide sediment controls and cover for stockpiles and to clean out all downstream sediment controls. Have sweeper unit onsite. Keep loose dirt out of gutters, sidewalks, and road.

It appears that the stormwater system and changes is reducing turbidity of the water. Took sample at bottom of hill by Warm Springs Road in Mesa UIS @ 10:30 AM after the rain stopped and turbidity was 12.5 NTU. No plume observed in Walling Creek.

Onsite meeting at 9:30 AM to discuss corrective actions after discharge of muddy stormwater due to signifcant rainfall and BMP failures ( inadequate outlet protection on new stormwater system features at Vortex/Ridgepoint pond and outfall at bottom of site, plugged/misconnected stormwater bypass pipe)

Corrective active plan:
- all work Friday and Saturday is focused on repair and preparing system to be properly operational
- repair/complete the new stormwater discharge pipe into pond so no erosion occurs when flowing into pond
- build lined & rip rapped spillway upstream from new DIs on Ridgpoint to prevent overflow from gutter over disturbed ground to pond

- add additonal lining to hold down sediment and perimter sediment controls around the Ridgepoint/Vortex pond to ensure no flows from disturbed areas around pond so all water going in is treated by a sediment control

- Plug outlet pipe from the pond ASAP to create a no discharge situation till system can be properly completed; will be plugged until system completion (monday-tuesday 5/4-5/5). Will need to be onsite if rain storm occurs (none currently forecasted) to make sure pond does not overflow
- repair broken manholes and make connections per plan. Verify correct connection once complete
- Install outlet protection (energy dissipators, scour prevention, rip rap, flow spreader etc) at bottom of site
- clean out any accumulated mud in the stormwater drainage system and below the site discharge. Remove mud on cement flume passing by JH storage lot
- take turbidity measurements and plan for turbidity testing of stormwater discharges after all 0.25 rain events until further notice. keep log in SWPPP
- complete corrective action report for SWPPP, share link to Syman website for the site's SWPPP with Boise ESC Inspectors for review


Follow up scheduled for Monday 5/4

Turbidity testing conducted:
- 9:10 ACHD stormwater basin at bottom of Starcrest prior to discharge to Boise River tributaries 44.7 NTU
- 9:15 Boise River tributary channel approx 1/3 mile downstream 37.2 NTU
- 9:40 Water pooled in Vortex/Ridgepoint pond 647 NTU
- 10:00 Bypass outlet pipe 968
- 10:05 down stream from outlet pipe in creek before flow into culver to flume 793 NTU
- note: estimate Boise River is no more than 5 NTU. This is an exceedence of water quality limits


Note: upper subdivsion is in compliance. No trackout, consturction entrance installed, concrete washout pan, bermed lotsf for stormwater control, revegetation looks really good

follow up scheduled for Monday

Curbing and sidewalks done on first phase of upper section, road bed installed and not paved. Grass is growing very well.
Ridgepoint is closed, crew on site.
Met with Mark, Dave, and Steve on site. Part of bypass pipe may be blocked or broken. Water is coming out of sewer top, running into creek, and into new line being installed. Water is ending up behind dam instead of around it. L2 is doing minimal work today since it is to wet. They want to have sewer connection done within 7 days.
Took turbidity readings:
Pond on Vortex 308 NTU
Bypass below dam 481 NTU
Creek outflow at bottom of site: 373 NTU.
Creek between overflow and dam, all stays on site :658 NTU
Everyone was notified of issue, working on solutions.

No trackout or discharges from subidvsion. No water or runoff leaving site or in creek.

WIP on Ridgepoint to install new storm drains and sewer connection for Vortex.

Correction request to fix silt fence section above the BH #6 pond and below the trent point entrance.

Plastic sheeting was pulled up from wind. Area affected was inside reservoir area behind dam, lining on road was all in place.
I pulled the liner back up and weighed down the seam with rocks, rolled boulder on lower section of plastic to keep the wind from blowing it off.
There was never a risk of discharge.

No water in vortex pond or above dam. Info board on street saying it will be closed for work 3/16-3/20.
New construction entrance at top. Road bed and sidewalks being prepped, looks like they are getting ready for curb sidealk and paving.

post rainfall inspection
Turbidity monitor calibrated before inspection.
Vortex ponbd 50.7 NTU
Pool behind dam 72.9 NTU
Outlet below tree 70.5 NTU
Creek before leaving site 74.1 NTU.
Boise River at Barber Park is 1.85ntu.

No dewatering, no pump on site.
New check dams installed coming down road at 25' spacing. Bottom of hill is all gravel, road from vortex pond to dam has been lined in poly.
No backup on road, no left behind sediment. No new rilling or failures noticed.

No activity at site, not currently dewatering.
Starting to see flow lines under dewatering bag, continued dewatering may start to cause rilling on hill.
Messured turbity:
Vortex Pond 71.2 ntu
Ponding behind dam 75 ntu
Outlet pipe below tree 39.4 ntu
Creek befor leaving site 34.3 ntu
No water coming out of first pipe directly below dam

Follow up inpsection from 4-5 PM to conduct turbidity testing.

The flow of muddy water into pond had been stopped by earthwork and redirected to flow downhill to the no-outlet reservoir for settling - less than 1/4 full. Pump was running to suck water out of Ridge Point Pond down into the reservoir.

Turbidity testing results:

Ridge Point pond inlet (culvert outlet at uphill end of pond) is street runoff and from BH#6 stormwater pond : 52 NTU

Stormwater bypass outlet pipe of Ridge Point pond water: 260 NTU (not in compliance)

Bottom of drainage @ Warm Springs before entering stormwater channel/pond : 208 NTU

No plume observed at outlet @ Walling Creek

Looks like dewatering is causing seepage and landslide below. Took pictures wil share with hillside engineer.

Construction activity is on winter hold till April. Full walk through to be conducted, but no muddy runoff observe and BMPs are installed.

Correction needed:
- update contact info on inspection reports
- reinstall barricade. Appears there is more joyriding occuring and trackout from that.

Walk through next week.

No significant trackout on Trent Point entrace. Permit information and SWPPP is onsite.. Stormwater discharge from site at end of pipe is clear. Limited areas of rill/gully erosion will need to be repaired. New berms and silt fence (around Ridgepoint pond) have been installed to control the flow/direction of runoff.

Corrections needed:
- update contact info for site contact in inspection forms; RP is not Eric Allen
- last inspection report entered was 11/19. Need to provide recent inspections and rainfall event inspection
- Need to pick up loose trash from insulated blankets/tarps around the lower dam area
- There is area of silt fence below the Vortex junction that needs trenching and the tracking upslope from this spot is parallet to the downhill direction.


RP Steve notified of corrections. Will follow up on next inspection

post rainfall inspection inspection 12 PM on 12/12

- Very muddy conditions on site, soil is saturated. Upper lots with terraces & berms held water.
- no signs of new erosion or breaks in the tacifier crust on slopes that have been applied.
- existing pond at Ridgepoint held water well, silt fence and rock bags have been lined along the gutter to prevent water cutting over disturbed area.
- pond is holding water for sedimentation and slowly draining water.
- water discharging at the final discharge point from the subdivsion was clear.

Corrections needed:
- maintenance and additional rock needed at both construction entrances
- need to post more no trespassing signs or block entrance when site is inactive, there have been some 4wd joyriders driving around the site and causing damage and trackout.

Notified RP Steve who had also done a post rainfall inspection.

WIP on retention.
Walked site to check for dust, runoff, or trackout.
No issues, water truck on site, dump trucks using internal road to haul fill from top.

Dust complaint received

.

Some dust observed in areas of equipment activity. Road grader is grading road base.. No plumes leaving site.

There was no dust truck in operation during the inspection from 2:45-3:45.

Stormwater controls are in place.

Work to begin on the lower stormwater ponds on Monday.

Inpspection 10/25 PM

No trackout at either the upper or lower entrance. No muddy discharges or consistent fugitive dust issues observed.

Areas that are at grade have stabilization measures implemented, including tracking, slope interupting wattles, and hydroseeding. There are not many signs of growth yet in hydroseeded areas.

Lots in the finished areas have been terraced and have earthen berm containments to retain water on site. Roadway bases have been compacted but do not yet have pit run due to some pending ACHD approvals. To slow any water that may be flowing down the roads, 1.5 ft check dam/water bars have been installed.
Areas that have been tracked will be hydoseeded this week, including above the new outlet pipe from the lower pond.

The site will continue winterization and installation of pipes and is hoping to begin work on the lower stormwater dams but they have not yet been approved by ACHD. If not approved, will need to consider additional temporary retention ponds and volume and velocity controls.

The sewer access road and area where drill rig did test holes will need stabilization measures if the ponds are not approved prior to the 1st week of November.

Follow up scheduled

Inspection Wednesday 10-9

No trackout at entrances. Crew installing pipe on Vortex. Areas at final grade have had stabilization measures implemented.

Some areas of wattle installation are not staked properly, notified installation crew.

No corrections at this time. Will follow up with full site walk through

Conference with site stormwater team to discuss corrections and upcoming plans at site:

- Construction entrance at Trent Point has been lengthened and widened. Street has been swept at entrance.
- Storm drain inlet on Ridgepoint will not have any sediment protection installed due to previous overflows and erosion of sediment into the stormwater pond whch outfalls to the Mesa drainage channel that sends water to the Boise River.
- The existing pond will be hydroseeded this month, the flow of stormwater passess over rip rap rock, and this rock channel with have wattle installed to keep sediment from the sides of the pond from getting into the rock.
- Work will begin next week or the following to install a bypass pipe that will take stormwater from the exisitng subdivsion in the pond and divert it around the area that is to be disturbed for creation of new ponds for the new subdivsion.
- Syman Co. has been working on maintaining all wattles and silt fences installed onsite, including repairing damaged silt below Vortex Drive
- Hydroseeding for temporary and permanent stabilization will occur in October.
- Roads will not get paved till next year, the road surface will be road mix to keep mud down and the roads will have stormwater controls installed to control direction of flow and velocity.
- new construciton entrance to be installed at Ridgepoint by the pond for the upcoming activity in this area.

Will continue to monitor and inspect weekly.

Neighbor was concerned with work below road.
Outlet for pond has been armored, some hillside disturbance.
Talked to Syman on site about some new BMPs, sent pics and request to Steve requesting installation.
Let concerned party know what I saw and my response.

Post rainfall inspection, report of 1" rain in 20 minutes.
RP on site with M3 reps.
SOme damage to pond at lower entrance, issue was water jumped curb from road, not from site.
Site absorbed water, no issues or blowouts. Syman on site checking BMPs, will add gravel bags to gutters.
More entrance rock on site, water line will need to be tied in in middle of entrance, will fix entrance after that is completed.
Will continue to clean streets of trackout.

fugitive dust complaint

- localized dust observed around equipmment movement. No wind blown dust occuring at time of inspection. Water truck onsite.

Lots of trackout and loose material on Trent Point. Will continue to monitor.

dust complaint.- morning winds + acitivity causing large plumes visible from Parkcenter/Apple

Certain instances of uncotrolled dust is occuring at subdivsion. Request to have a truck that is only responsible for dust control along haul routes, stockpiles, and open disturbed areas where wind blown dust is occuring.

Currently there are 3 seperate crews with their own water truck. Trucks need to coordinate together to make sure areas are adequately sprayed with water. Request to start day with watering to soak in areas where work will occur. Crew noted that steep sections of haul roads cannot have too much water due to the heavy loads and traction.

Will continue to monitor, extra truck should be there for next week

Wind is blowing towards neighborhood today. Two water trucks running on site, still some dust. Sand rock seperator also running and being water, causing some dust. Water trucks are still going to warm springs for water, no plan to bring tank to site. Some trackout, let foreman know that track pad needs to be cleaned. All workers parking on road.
Major source of dust is lower haul road, has been saturated with water, dust is very fine. Site has lots of disturbed area and very loose dust, like talcum powder.
3 area of blasting remain. Some sort of temporary stabalization should be considered on idle areas.

Construction entrance has been widened but there is still trackout and and loose dirt on Trent Point.

Corrections in progress:
- going to install access to water so they can fill onsite tanks, water trucks will no longer need to leave site. Central Paving and L2 are supposed to have water trucks operating for dust control and compaction.
- construciton entrance rock should be roughened each day for maintenance. Access should set up so that all exiting traffic must travel over the full length of the trackpad.

Follow up scheduled.

complaint received 7/5 - dust issues at construction entrance.

notifired RP 7/5 to sweep up all loose dirt on Trent Point to Windsong. Follow up at site.

Corrections needed:

- do maintenance on construction entrance. Rough up rock, add rock, make rock go to edge of Trent Point and lengthen. Prevent truck and works from driving around rock entrance.

- sweep up gutter on Windsong from Birdsong to Trent Point.

Water truck on site, no blowing dust. No trackout or ESC issues.

Met with Syman crew on site. SOme areas of wire back silt fence have been undercut and need repair. End of road cut in acting as channel, asked for a few tiers of wattle going down hill and also below silt fence in case of failure.
They need to get more materials and will be back. Asked to have done before rain event anticipated 5-24.

No dust issues with grading. Still not much disturbed area. Some trackout. Entrance is being avoided, needs to be expanded. Message and picture sent to RP, follow up scheduled.

10 AM pre-con meeting