TKPOA RFP Q&A Addendum

Questions and Answers Addendum
Tahoe Keys Property Owners Association (TKPOA)
Control Methods Test (CMT) Implementation Services Request for Proposal (RFP)
CMT Implementation Services RFP – Q&A Addendum March 22, 2022
Tahoe Keys Property Owners Association Page 1
Please find below responses to questions received during the question period of the
TKPOA CMT Implementation Services RFP. All questions received electronically by 5:00
pm March 16, 2022 are included in the responses below.
Q.1. If responding to multiple scopes of work, would TKPOA like separate
submittals for each scope of work, or would one submittal for multiple SOWs
suffice?
TKPOA asks that for each scope of work, a separate bid be prepared for cost
comparison purposes.
Q.2. Will all scopes of work have separate contracts?
Yes, each activity to be contracted will have a separate contract.
Q.3. Can a bidder bid on more than one item in the CMT Implementation Services
RFP? Will it hurt evaluation scores of bidders to submit bids on one or all
scopes of work included in the TKPOA RFP for CMT Implementation
Services?
All bidders are encouraged to bid on which ever scope(s) are of interest. Bids for
each scope of work will be evaluated based on technical expertise, sustainability,
and fit. TKPOA is looking for the greatest expertise for each activity and may
choose several contractors to meet that goal. Scores and evaluations of bids will
not be influenced by the number of activities bid upon.
Q.4. Average depth of the Tahoe Keys lagoons for each treatment area to
accurately calculate area / feet dosing?
Water level in the Tahoe Keys lagoons is currently rising and will continue to rise
through to the end of June. Hydroacoustic scans early season 2020 and 2021 have
been provided as an attachment to this Q&A Addendum and 2022 hydroacoustic
scan data can be provided in April and May upon request following contracting. In
response to this RFP, you are encouraged to provide a 'maximum' volume
estimate assuming depths of a) 15 ft, and b) 12 ft.
Q.5. How many of the sites can be done in one day?
Bidders are encouraged to provide estimates on timing for each activity.
TKPOA assumes, at a minimum, that:
• three (3) herbicide or combination sites will be treated with herbicide per
day during the 5-day application period;

• Lanthanum modified clay (LMC) applied to up to three (3) sites per day,
similarly to herbicide;
• Well water be collected from all three (3) TKPOA wells in one day;
• All continuous data loggers be downloaded in 1 day; and
• A total of six (6) sites (12 sampling stations) per day for nutrient grabs.
Q.6. Request for more well water monitoring details:
a. Is this just taking samples from the taps or the wells themselves? Are
they stand alone wells?
The TKPOA have 3 independent wells (see Attachment 2). Raw water samples
will be collected from the wells every 48 hours for 14 days.
b. Please confirm that following application events, all three wells will be
sampled every 48-hrs regardless of where the applications occur.
All three TKPOA wells (Wells #1, #2, and #3) are to be sampled every 48 hours,
beginning 2 days after the first treatment of herbicide, for 7 sampling events (or
14 days after treatment). This sampling is regardless of where herbicide is
applied within the Tahoe Keys lagoons.
c. Do the supply wells need to be purged prior to sample collection - this is
standard practice? However, if wells are continually used, purging
should not be required.
Specific details for well water monitoring will be determined during contracting
and associated meetings with Tahoe Keys Water Company representatives.
d. If purging is required; what is the required purge volume (this is typically
a function of the well construction - are there well construction drawings
available?), or purge until stability of parameters (i.e. pH, temperature,
conductivity)? Where can purge water be contained/disposed?
e. Sample from spigot on well or other means?

f. When referring to 2x each sample per day - we assume this includes the
collection of an original sample for analysis and the duplicate sample
which is to be stored by the TKPOA (total of 2 samples per day from each
well). Is this correct?
g. Regarding pre-application samples, Exhibit A.1.3 page 25 mentions that
the pre-treatment samples are to be collected within 48 hours before
application; Table 4 page 11 shows the well sampling beginning May 16
with applications starting May 23. If within 48-hours, the pre-application
well sampling should start May 21.
Well samples shall be collected 48 hours prior to herbicide application.
Application is anticipated to occur May 23 - May 27. Final application dates will
be provided to the selected contractor 30 days prior to application.
Q.7. Is TKPOA anticipating contractors supply necessary equipment for CMT
activities, including: a petite ponor grab, Kemmerer bottle, 250-micron mesh
sieve, 500-micron mesh d-net, fluorometer, mini-DOT loggers and YSI?
Yes, contractors are responsible for providing all required equipment to complete
contracted activities. For equipment, the brands above or equivalent are permitted.
Contractors will be responsible for coordinating with selected laboratories for
analysis to provide all required sampling bottles and preservatives.
Please Note: Standard (YSI or equivalent) water quality monitoring for the CMT
Project will be conducted by TKPOA staff. Contractors are not required to provide
YSI or equivalent equipment or monitoring.
TKPOA will purchase and install miniDOTs (2 per site). Contractors are not
required to provide miniDOT loggers.
Q.8. Request for more information on laboratory services for the CMT Project:
a. Does TKPOA have a preferred analytical laboratory they would like used
for the requested analysis?
Laboratories for nutrient, Phoslock, herbicide, and cyanobacteria analysis shall
be selected as part of the TRPA RFP for the project (https://www.trpa.gov/wp-
content/uploads/Keys-Monitoring-RFP-Package_Final.pdf). Bids for laboratory
analysis for the CMT Project are due to TRPA on April 8, 2022.

b. Please specify analytical methods for chemical analysis (wasn't clear in
40 CFR Part 136)
Please refer to Attachment 4.
c. Would endothall analyses suffice, instead of endothall acid or endothall
dipotassium salt?
d. Are there specific laboratory reporting limits for the required chemical
analysis?
e. Please specify the chemical acronyms TCP and 3,6-DCP for clarity
Triclopyr Degradants:
• 3,5,6-trichloro-2-pyridinol (TCP)
• 3,5,6-Trichloro-2-methoxypyridine (2-MP)
Q.9. Please specify when the final herbicide applications end (June 1?), we
understand the start date for herbicide application is May 23, so we can
gauge the end of the well monitoring period (i.e. 14 days after the final
application)
At this time, herbicide application is anticipated to take a total of 5 days. The final
application dates will be determined and submitted to Lahontan RWQCB 30 days
prior to application. The final application dates are highly dependent on water
inflow to the Tahoe Keys, water temperature, and growth / height of plants in the
Tahoe Keys lagoons. Currently, herbicide application is scheduled to occur May
23 - May 27.
Q.10. For the Phoslock applications, is there any table indicating rates similar to
that provided for the herbicide application? Dosage rates for this product is
calculated from phosphorous levels in the water, if not we need to know the
preexisting levels and which treatment zones to target.
At this time there is not a similar table for Phoslock applications. Criteria for
contingent application of Phoslock is attached as Attachment 3 to this RFP
Addendum. Monitoring of total phosphorus levels and HABs will occur throughout
implementation of the CMT. Pre- and post-treatment levels shall be monitored per
the NPDES MRP. All results from nutrient grab samples will be made available to
the selected contractor.

Q.11. The specifications for the tank on the tandem trailer refer to a 5000-gallon
tank. The weight would be about 40,000 pounds and might be an issue for
weight on your roads. In any events it’s going to take more than one semi
sized trailer and tractor to contain that much water. Would a 500-gallon tank
work?
A minimum 1,600-gallon DOT-approved on-road water trailer or water truck is
acceptable.
Q.12. Request for information regarding Spill Response:
a. Hoses may have to be deployed through private property. Will TKPOA
work with the residents to gain access/obtain access agreements?
Yes, TKPOA will give advance notification to residents in the CMT Project
areas for which access may be required.
b. The 5,000-gallon tank may be staged on a cul-de-sac or on the street as
part of the spill response procedures. Will this be a problem?
Changes in the amount of herbicide to be carried by the application boats
reduce the required tank size from a truck-mounted 5,000-gallon tank to a
1,600-gallon trailer mounted tank. Staging (parking) is not expected to be a
problem given its reduced dimensions.
c. The RFP calls for 20 minutes to respond to spill, we read this as
equipment being deployed in 20 minutes, not pumping. May take extra
time to prime pumps and begin pumping. Will this suffice?
Response time of 20 minutes to get equipment deployed and another 5 minutes
to be operational is acceptable.
d. Will there be any issue with a forklift on public roadways in the Keys if we
choose to use one?
There are no issues with the use of forklifts on public roadways in the Tahoe
Keys.
e. Are there any height restrictions on public roadways in the Keys?
There are no restrictions to Tahoe Keys roadways. Most roads in the Keys are
accessible by semi-trucks. The only potential issue is overhead electric lines
on Texas Street and 15th Steet.

f. Are there any noise restrictions for spill response equipment in the Keys?
Noise levels should comply with the City Noise Ordinance for construction
standards.
g. Are there specific hours and days of operation in the Keys?
All construction is limited to the hours of 7:00 am to 7:00 pm Monday - Friday
and 8:00 am and 5:00 pm Saturday - Sunday.
h. Is the water board or TKPOA going to require secondary spill
containment for the 5,000-gallon tank?
No. There are no secondary spill containment requirements for the receiving
tank.
i. Can a gasoline operated pump for spill clean-up be used on a boat?
No equipment or supplies beyond those needed for herbicide application
should be used in the boat.
j. Section 4.3.1 Spill Response Requirements - who will be responsible for
determining the maximum allowable concentrations in the water in the
event of a spill (i.e. 5 ppm for endothall and 2.5 ppm for triclopyr)?
The contractor responsible for application of herbicides will report to the Project
Manager directly following a spill. The maximum allowable concentrations in
water will be determined by the Project Manager, Dr. Lars Anderson, the QAL
applicator, and, if necessary, through consultation with Lahontan RWQCB staff.

Questions and Answers Addendum – Attachments
Tahoe Keys Property Owners Association
Attachment 1
Early Season Hydroacoustic Scans

4/23/2021 5/9/2021 6/28/2021
Vegetation
Bathymetry
3/22/2022 Attachment 1 - Early Season Hydroacoustic Scans (2020 - 2021) 1

6/16/2020
5/22/2020
Vegetation
Bathymetry
3/22/2022 Attachment 1 - Early Season Hydroacoustic Scans (2020 - 2021) 2

Attachment 2
Well Locations Map

Attachment 3
Phoslock Criteria

Attachment 3 – Criteria for Phoslock Application
Control Methods Test (CMT) Implementation Services RFP
Question and Answer Addendum
Draft Attachment 3 – Phoslock Criteria March 21, 2022
SEA Page 1
The LMC application concentration is not to be greater than the recommended label
application rates (Exhibit E of RFP). LMC is permitted to reduce the phosphorus concentration
between the water quality objective of 0.008 mg/L and 0.005 mg/L. In no case shall the quantity
of LMC discharged be greater than the amount necessary to reduce the phosphorus in the
waterbody to attain the target range of total phosphorus concentration.
The following criteria must be met prior to application of LMC:
• Visual inspection of a treated area indicates a possible HAB;
• Phosphorus concentrations in the water column for the treated areas are higher than
that of the CMT Project control site(s);
• Cyanobacteria indicators are at caution levels or higher1
; and
• Alkalinity of the water in the area to be treated is greater than 20 mg/L.
The application of LMC must adhere to the Lanthanum Modified Clay Application Plan, to be
submitted to Lahontan in April 2022. The plan will be provided to the selected contractor.
Monitoring for a contingency application of LMC shall follow requirements put forth in NPDES
Permit ORDER No. R6T-2022-0004 NPDES NO. CA6202201 WDID NO.6A091701001, Attachment
E – Monitoring and Reporting Program, Table E-2. Monitoring Requirements for Lanthanum
Modified Clay.
Unless otherwise specified in the monitoring plans for pre- and post-CMT treatments, standard
water quality and effectiveness monitoring will be conducted using industry accepted
standard protocols, approved by TKPOA in writing before LMC treatments. All monitoring and
data collection shall comply with the Lahontan and TRPA approvals and permits for the
Project.
1
Caution levels are: Microcystins ≥ 0.8 µg/L; Presence of anatoxin-a; and Cylindrospermopsin ≥ 1.0 µg/L

Attachment 4
Lab Analysis, Reporting limits, turnaround time

CMT Implementation Services RFP
Attachment 4 - Lab Analysis, Reporting Limits, and Turnaround Times
Analyte Sample Matrix Method Method Reporting Limit Turnaround Time
Total phosphorus SW, GW SM 4500-P E 0.008 5-7 business days from delivery to lab
Ortho-phosphorus SW, GW, SM 4500-P E 0.008 5-7 business days from delivery to lab
Nitrate SW, GW, EPA 300.0 0.009 5-7 business days from delivery to lab
Nitrite SW, GW, EPA 300.0 0.003 5-7 business days from delivery to lab
Total Kjeldahl Nitrogen SW, GW EPA 351.2 0.08 5-7 business days from delivery to lab
Free Lanthanum SW, GW E200.7 0.02 72 hours from delivery to lab
Total alkalinity SW SM 2320 B 1.0 72 hours from delivery to lab
Sediment Organic Matter S D2974 1% 5-7 business days from delivery to lab
Anatoxin-a SW, GW ELISA Method 545 0.15 5-7 business days from delivery to lab
Cylindrospermopsin SW, GW ELISA Method 546 1.15 5-7 business days from delivery to lab
Microcystin / Nodularin SW, GW ELISA Method 544 0.15 5-7 business days from delivery to lab
Total phosphorus SW, GW SM 4500-P E 0.008 5-7 business days from delivery to lab
Endothall acid SW, GW, S, SE EPA 548.1 0.05 48 hours from delivery to lab
Endothall Dipotassium Salt SW, GW, S, SE EPA 548.1 0.05 48 hours from delivery to lab
Triclopyr acid SW, GW, S, SE EPA 8151A 0.05 48 hours from delivery to lab
3,5,6-Trichloro-2-pyridinol (TCP) SW, GW, S, SE EPA 515.3 0.05 48 hours from delivery to lab
2-methoxy-3,5,6- trichloropyridine (2-MP) SW, GW, S, SE Dow Chemical Co. Method ACR 77.4 0.05 48 hours from delivery to lab
Note: Analysis for phoslock monitoring require 72 hour turnaround
Attachment 4
TKPOA March 22, 2022

Attachment 5
Average Total Phosphorus Concentrations

Year Total Phosphorus (TP) , mg/L
2007 0.030
2008 0.033
2009 0.043
2010 0.019
2011 0.023
2012 0.019
2013 0.026
2016 0.025
2017 0.033
2020 0.035
Water Quality Objective 0.008
3/22/2022
Attachment 6 - Average Total Phosphorus Concentrations in the
Tahoe Keys lagoons
1
Control Methods Test
Attachment 6 – Average Total Phosphorus Concentrations in the Tahoe Keys Lagoons

TKPOA RFP Q&A Addendum

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