WQ0037287_Application_20190905

Pilot Study Results and Infiltration Capacity
Pluris Wastewater Treatment Plant High -Rate
Infiltration System Permit No. WQ0037287
Pender County, North Carolina
Prepared for
Michael C. Gallant, PE
PO Box 4039
Surf City, NC 28445
Prepared by
EEE Consulting, Inc.
8525 Bell Creek Road
Mechanicsville, Virginia 23116
July 2018
Prepared by: Zach Kiracofe, PG
Doug Fraser, PG
Reviewed by: Andrew E. Kassoff, PG, PE, LEED AP
3e EEE Consulting, Inc.
Environmental, Engineering and Educational Solutions

Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
Table of Contents
Acronyms.......................................................................................................................................
iii
Signature/Certification Page..........................................................................................................
iv
1.0 INTRODUCTION....................................................................................................................
1
2.0 PILOT TESTS SCOPE AND PROTOCOLS...........................................................................
2
2.1. Monthly Infiltration Pilot Study...........................................................................................
2
2.2. 24-Hour Constant Head Pilot Tests......................................................................................
3
3.0 PILOT TESTS RESULTS AND ANALYSIS..........................................................................
4
3.1. Pilot Study Data...................................................................................................................
4
3.2. Monthly Pilot Tests..............................................................................................................
5
3.3. Twenty Four -Hour Constant Head Tests.............................................................................
7
4.0 RESULTS AND CONCLUSIONS...........................................................................................
9
Appendices
Appendix A: Monthly Pilot Test Data
Tables
1: Water Balance Calculations - November 2018
2: Water Balance Calculations - December 2018
3: Water Balance Calculations — January 2019
4: Water Balance Calculations — February 2019
5: Water Balance Calculations — March 2019
6: Water Balance Calculations — April 2019
7: Daily Test Inflow and Stage Height - February 28-March 1, 2019
8: Daily Test Inflow and Stage Height - March 7-8, 2019
9: Daily Test Inflow and Stage Height - March 13-14, 2019
10: Comparison of Measured Precipitation at Pluris Hempstead WWTP and Average
Precipitation at Jacksonville, NC
11: Calculated HRI Basin Stage/Infiltration Results — November 2018 to April 2019
Cumulative Data
12: Calculated HRI Basin Infiltration at Maximum Stage - November 2018 to April
2019 Monthly Data
13: Summary of 24-Hour Constant Head Test Results
Fi ures
Figure 1:
Monthly Pilot Test Graphs, November 2018-April 2019, HRI #1
Figure 2:
Monthly Pilot Test Graphs, November 2018, HRI #1
Figure 3:
Monthly Pilot Test Graphs, December 2018, HRI #1
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
Figure 4:
Monthly Pilot Test Graphs, January 2019, HRI #1
Figure 5:
Monthly Pilot Test Graphs, February 2019, HRI #1
Figure 6:
Monthly Pilot Test Graphs, March 2019, HRI #1
Figure 7:
Monthly Pilot Test Graphs, April 2019, HRI #1
Figure 8:
Monthly Pilot Test Graphs, November 2018-April 2019, HRI #2
Figure 9:
Monthly Pilot Test Graphs, November 2018, HRI #2
Figure 10:
Monthly Pilot Test Graphs, December 2018, HRI #2
Figure 11:
Monthly Pilot Test Graphs, January 2019, HRI #2
Figure 12
Monthly Pilot Test Graphs, February 2019, HRI #2
Figure 13:
Monthly Pilot Test Graphs, March 2019, HRI #2
Figure 14:
Monthly Pilot Test Graphs, April 2019, HRI #2
Figure 15:
Daily Test Graphs, February 28-March 1, 2019, HRI #2
Figure 16:
Daily Test Graphs, March 7-8, 2019, HRI #1
Figure 17:
Daily Test Graphs, March 13-14, 2019, HRI #1
Figure 18:
Daily Test Graphs, March 13-14, 2019, HRI #2
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
Acronyms
Feet Above Mean Sea Level
Gallons Per Day
Gallons Per Minute
Groundwater Infiltration Pond
linear feet
High Rate Infiltration Basin
North Carolina Department of Environment and Natural Resources
North Carolina Department of Environmental Quality
North Carolina Division of Water Resources
National Pollutant Discharge Elimination System
ft. msl
gpd
gpm
GWI
LF
HRI
NCDENR
NCDEQ
NCDWR
NPDES
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
Signature/Certification Page
Professional Certification
I certify that I have personally examined and am familiar with the information submitted in this
application and all attached documents, and that, based ' on my inquiry of those individuals
immediately responsible for obtaining the information, I believe that the submitted information is
true, accurate, and complete. I am aware that there are significant penalties for submitting false
information, including the possibility of fine and imprisonment.
Name: Andrew E. Kassoff, PE, PG
Signature:
North Carolina Professional Certification Type and Number: PG 1227• PE 035181
Company: EEE Consulting, Incorporated
Address: 8525 Bell Creek Road
City/State/Zip: Mechanicsville, Virginia 23116
The conclusions of this report may vary from past or future observations by 3e or others, and the
report and its conclusions are based upon a review of available information at the time of this
report and/or professional judgement. To the best of our knowledge, information provided by
others is true and accurate, unless otherwise noted. 3e shall incur no liability resulting from
information supplied by others.
� H CARa �i
a� SEAL:
035181 4
El
3e Project Number 18-500 iv July 2019

Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
1.0 INTRODUCTION
The Pluris Hampstead Wastewater Treatment Plant (WWTP) facility was issued a non -discharge
permit (No. WQ0037287) from the North Carolina Department of Environmental Quality
(NCDEQ) (formerly the Department of Environment and Natural Resources - NCDENR) Division
of Water Resources (NCDWR) in April 2015. The wastewater treatment system discharges
effluent to two 0.13 acre high -rate infiltration (HRI) basins separated by 100 feet of engineered fill
in a central berm that meets the requirements of Session Law 2014-95. The HRI basins are
surrounded by a perimeter groundwater lowering system with approximately 992 linear feet (LF)
of 12-inch HDPE pipe and approximately 425 LF of 18-inch HDPE pipe. The groundwater
lowering system gravity discharges to an approximately 4.2-million-gallon effluent storage pond
herein referred to as the groundwater infiltration (GWI) pond. A valve on the perimeter
groundwater lowering system controls the discharge to the GWI. The NCDWR permit allows
discharge of 50,000 gallons per day (gpd) on a monthly average to the HRI basins with no
discharge of wastewater to surface waters. Construction of the facility including two HRI basins
was completed in 2015.
The GWI was originally designed to discharge to surface water through a level spreader. The level
spreader and outlet structure for the GWI were subsequently removed from the system design.
NCDWR issued a separate National Pollutant Discharge Elimination System (NPDES) permit for
the facility (NC0089524) in October 2015 that provides for facility discharge to surface waters.
To date, no surface water discharges have occurred. In April 2017 NCDWR issued a minor permit
modification to address the above and other changes to the facility.
In 2018, Pluris Holdings, LLC (Pluris) contracted with EEE Consulting, Inc. (3e) to prepare a
water balance analysis of the Hampstead Wastewater Treatment and High -Rate Infiltration facility
in Pender County, North Carolina. The objective of the 2018 water balance analysis was to
evaluate the actual infiltration capacity of the system using operational data collected during 2017.
To meet this objective, 3e prepared individual water balances for the three main facility infiltration
components; the two HRI basins and the GWI which were combined into a facility wide water
balance.
The monthly infiltration rate for each of the HRI basins ranged from approximately 9,000 to 30,000
gpd and averaged approximately 20,000 gpd during calendar year 2017. The average monthly
infiltration rate for the GWI from April to December 2017 was approximately 32,100 gpd with a
maximum average monthly infiltration rate of nearly 119,000 gpd. These infiltration rates were
achieved under low head conditions (i.e., the water levels in the HRI basins and GWI were well
below the design maximum water levels. The sum of the maximum average monthly infiltration
rates was approximately 175,000 gpd. The cumulative maximum daily infiltration values of the
three basins was 538,500 gpd.
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
Based on these analyses, Pluris requested a permit modification to reestablish the effluent flow
limit to 175,000 gpd. On August 1, 2018 NCDWR issued a letter requesting additional information
and clarifications to the 2018 water balance report. On August 8, 2018 design consultant to Pluris
Michael Gallant, PE, with assistance from 3e, submitted a response letter to NCDWR addressing
each of the August 1, 2018 comments. Over the next several months representatives for Pluris and
NCDWR corresponded and met to address the central NCDWR concern that the 2017 data had not
shown (to the satisfaction of NCDWR) that the existing infiltration basins can accommodate
loading (inflow) rates significantly higher than the permitted capacity and that additional data were
needed to demonstrate the proposed loading rates.
To address this issue, Mr. Gallant submitted a formal plan for additional evaluations (pilot study)
of the actual infiltration capacity of the two HRI basins to support a future permit modification
application. The Pluris Hampstead WWTF pilot infiltration study consisted of two main
components designed to collect data to further assess the operational infiltration rate of the two
HRI basins currently in use at the plant; a six-month long monthly pilot study, and three one day
constant head tests. The scope and protocols of these tests are presented in the following section.
2.0 PILOT TESTS SCOPE AND PROTOCOLS
2.1. Monthly Infiltration Pilot Study
General Scope and Obiectives
The monthly pilot study was performed for both HRI basins from November 1, 2018 through April
30, 2019. Throughout the study, total discharge from the WWTP was periodically alternated
between the HRI basins. In general, the discharge to each basin was alternated approximately
every seven to eight days although there were periods during the six-month study period when
flows were alternated every one to two days.
The objectives of this monthly pilot study were to:
➢ Provide operational data (hydraulic head level/stage height) in each basin at higher
discharge rates than occurs under normal operating conditions when flow is sometimes
split/discharged to each HRI concurrently
➢ Assess the HRI basin capacity during the months when precipitation is higher, and
evapotranspiration is lowest.
➢ Demonstrate the existing infiltration basins can accommodate loading rates significantly
higher than the permitted capacity.
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
Parameters and Measurements
➢ The bottom elevation of each HRI basin is approximately 38 feet above mean sea level.
➢ The berm of each HRI basin is 45 feet above mean sea level
➢ The maximum operational stage height in each HRI basin with two feet of freeboard is
five (5) feet which corresponds to an elevation of 43 feet above mean sea level.
➢ The inflow (loading) to each basin was recorded daily as is being done as a condition
of the current non -discharge permit.
➢ A facility rain gage was read daily to record precipitation at the site.
➢ Total inflow to the basins was calculated as the inflow/loading from the WWTP plus
incident precipitation to each basin. There is no surface water run-on to the basins.
➢ Evapotranspiration from the basins is de minimis and was not included in the analysis.
➢ The water balance equation was adjusted to solve for net daily infiltration rates in gpd:
Infiltration = Inflow/Loading + Precipitation — 0 Storage
➢ Transducers/data loggers were placed in each basin to record the levels of each basin
and programmed to include hour stage levels.
➢ The transducers were set at elevations of 38.44 and 37.80 in HRI #1 and #2,
respectively.
➢ The depth to the static water level in nearby monitoring wells MW2 and MW 3 was
recorded daily.
2.2. 24-Hour Constant Head Pilot Tests
General Scope and Obiectives
Three 24-hour constant head tests were performed in late February and early March 2018. These
24-hour tests were designed to be constant head tests where a high discharge rate to each basin
would be adjusted to the extent practicable in order to maintain a relatively constant water level or
hydraulic head at least one foot above the basin bottoms but below HRI maximum water level of
five feet. The three separate tests were conducted over a 24-hour period as follows.
1. February 28-March 1, 2019 — All flow was directed to HRI 2. Flow to HRI 1 was cut off
2. March 7-8, 2019 — All flow was directed to HRI 1. Flow HRI 2 was cut off.
3. March 13-14 — Flow was directed to both HRI basins.
As noted in an October 15, 2018 email to NCDWR "the constant head portion of the study will be
difficult to perform with typical plant flows. The discharge to the basins is intermittent depending
on membrane permeate vs. rest cycles along with the typical diurnal peaks in sewer flow to the
plant." To accomplish the high loading required for the constant head tests additional water from
the GWI pond was pumped to the HRI basins.
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
The objectives of the 24-hour constant head tests include:
➢ Determining the performance of each HRI basin in response to a prolonged 24-hour high
inflow/loading rate and a high daily total inflow volume.
➢ Evaluate the infiltration rates at relatively constant operating water levels (stage).
➢ Analyze the data to predict HRI basin response under instantaneous and daily loading rates
that are significantly higher than the current permitted capacity.
Parameters and Measurements
The parameters and measurements for the 24-hour tests were similar to the monthly study with the
following changes:
➢ Additional water for the high discharge one day tests was obtained from the GWI pond.
➢ Water levels were measured every 15 minutes by the transducers/data loggers.
➢ There was no precipitation during the 24-hour tests; therefore, loading from WWTP is the
total inflow to the HRI basins.
➢ As these tests achieved a relatively stable constant head, the change in storage was
negligible; therefore, inflow equals infiltration.
3.0 PILOT TESTS RESULTS AND ANALYSIS
3.1. Pilot Study Data
Pluris Hampstead, LLC provided 3e with all the monitoring and operational data for the monthly
and daily pilot tests. The monthly monitoring and operational data for the November and
December 2018, January, February, March, and April 2019 are presented in Appendix A. Tables
1 through 6 present the water balance calculations for each month, respectively. Tables 7
through 9 present the data for the daily constant head test data and calculated inflow/infiltration
rates. Some manually collected data (monitoring well water levels) were not collected on
weekends or holidays.
To meet the study objectives the following analyses were completed:
➢ Net daily infiltration rates were calculated using the following water balance equation
adjusted to solve for net infiltration rates in gpd: Infiltration = Inflow/Loading +
Precipitation — A Storage
➢ Several graphs/plots were prepared to present the study data
➢ Stage height/infiltration rating plots were prepared to calculate the infiltration capacity of
the basins at higher loading rates
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
The rating plots were used to predict the maximum infiltration rate of each basin with a head that
is equivalent to having two feet of freeboard in the basins.
3.2. Monthly Pilot Tests
The monthly pilot study was performed for both HRI basins from November 1, 2018 — April 30,
2019. As presented above inflow (loading) to each basin was alternated approximately every seven
to eight days although there were periods during the six-month test period when flows were
alternated every one to two days.
The facility rain gauge precipitation data was compared to average monthly precipitation data for
Jacksonville, North Carolina (from the US Climate Data website
https://www.usclimatedata.com/climate/jacksonville/north-carolina/united-states/usnc l 305).
Table 10 shows that over the six months from November 2018 to April 2019, precipitation at the
facility exceeded the average precipitation at Jacksonville NC by over six inches with November
and December 2018, and March and April 2019 having higher than normal precipitation.
Numerous graphs/plots of the data were produced for each HRI for the full six month pilot test
period and for each month. The plots included temporal variation of Total Inflow vs. Precipitation,
Total Inflow vs. Stage Height, and Stage Height vs. Calculated Infiltration over the six month test
period and for each month. A best fit regression analysis of the Stage Height vs Calculated
Infiltration was also completed for each HRI basin over the six month period and for each month.
The graphs/plots for the HRI #1 data are presented on Figures 1 through 7. The graphs/plots for
the HRI #2 data are presented on Figures 8 through 14.
The temporal variation in Total Inflow vs. Precipitation graphs and data show that larger rainfall
events due have a measurable contribution to basin inflow. Each one -inch of rainfall results in
approximately 5,000 gallons of direct precipitation to each basin.
Excluding the data from the one day constant head tests run in late February and early March
during which extra water from the GWI was discharged to the HRI basins, discharge to the HRI
basins ranged from a low of 22,000 gpd to nearly 100,000 gpd. The daily average loading was
approximately 57,500 gpd. The monthly discharge to the HRI basins averaged approximately
1,750,000 gallons.
The responses (stage height) of each of the HRI basins are best illustrated on the Stage Height vs.
Infiltration rating graphs (Figures 1 through 14) for the individual months and for the entire six
month period. These graphs show a slight lag in stage height response to inflow variations. The
time lag and some of the variability evident in the data are partially due to the inflow and stage
height readings are for one point in time each day with the inflow value equal to inflow over the
previous 24 hours and the stage being an instantaneous reading. Furthermore, the stage height is
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
partially dependent on the basin inflows on the preceding day(s). Thus, the same stage height on
different days may have significantly different inflows for those days depending the preceding
day(s) inflow. Excluding the data from one day tests, stage height during the monthly tests ranged
from near zero to a maximum of 0.99 feet in HRI # 1 and 2.01 feet in HRI #2. These stage heights,
which are approximately four and three feet, respectively, below the maximum operating level
stage height of five feet, demonstrate a significant excess capacity of the HRI basins to infiltrate
WWTP water. As discussed in Section 4.3 below higher stage heights were measured during the
significantly higher loading rates in the one day tests.
A multiple linear regression was performed on the stage height vs. inflow data. The linear
regression equations are shown on each graph.
Table 11 presents the calculated HRI basin infiltration rates at varying stage heights using the
linear regression equations from each basin for the cumulative November 2018 to April 2019 test
data. These data indicate that at the maximum stage height of five feet, HRI #1 can infiltrate
approximately 798,000 gpd, and HRI #2 can infiltrate approximate 428,000 gpd.
The differences in infiltration rates between the basins is likely partially attributed to some variance
in the engineered material in the central berm. The differences may also be partially attributed to
a smaller hydraulic gradient out of HRI #2. The regression analysis results shown on Table 11
indicate that a low stages HRI #2 has a negative infiltration rate which suggests groundwater
inflow at stages less than 0.75 feet. HRI #1 shows negative infiltration at stages of around 0.25
feet. The data suggest that the bottom of the basins was slightly below the seasonal high water
table during the study period.
Table 12 presents the calculated HRI basin infiltration rates at the maximum stage height of five
feet using the individual monthly data from November 2018 to April 2019. The averages of the
maximum infiltration rates for HRI #1 (791,000 gpd) and HRI #2 (445,000 gpd) are very similar
to the maximum rates presented above for the six month cumulative data. The data in Table 12
show a high degree of variability for HRI # 1 whereas the data for HRI #2 are relatively consistent.
The difference in consistency can not be readily explained. It is noted that the highest infiltration
rates for HRI #1 correspond to the months with the highest precipitation, November and
December, and the highest net inflow, March. The average of the three lowest infiltration rates
for HRI #1 is 506,000 gpd.
The maximum infiltration during the monthly pilot study was 370,000 gpd in HRI #1 during the
March 7-8 constant head test. The corresponding stage height was 1.78 feet; more than three feet
below the maximum stage height of five feet. The maximum infiltration for HRI #2 was 273,000
gpd during the February 28-March 1 constant head test. The corresponding stage height was 3.26
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
feet; or 1.74 feet below the maximum stage height. These data indicate the HRI basin have
significantly higher infiltration capacity than the current permit limits.
3.3. Twenty Four -Hour Constant Head Tests
As presented in Section 3.2, three 24-hour constant head tests were performed in late February and
early March 2018. These daily tests were designed to be constant head tests where a high discharge
rate to each basin would be adjusted to the extent practicable in order to maintain a relatively
constant water level or hydraulic head at least one foot above the basin bottoms but below HRI
maximum water level of five feet. The three separate daily tests were conducted over a 24-hour
period as indicated below:
1. February 28-March 1, 2019 — All flow was directed to HRI 2. Flow to HRI 1 was cut off
2. March 7-8, 2019 — All flow was directed to HRI 1. Flow HRI 2 was cut off.
3. March 13-14 — Flow was directed to both HRI basins.
February 28-March 1, 2019
For this test, flow from the WWTP and supplement water from the GWI were discharged to HRI
#2. The test data are presented on Table 7. Figure 15 presents the data graphs for this test. For
the first five hours loading to the basin was generally constant with a high inflow rate of 495
gallons per minute (gpm) and an average inflow rate of 445 gpm (equivalent to approximately
640,800 gpd). The water level was stabilizing at just over four feet. However, the flow rate could
not be sustained. Total loading to HRI #2 over a 24-hour period was 383,000 gallons. The
maximum stage during the test was 4.48 feet when the inflow was at 495 gpm. A steady state
constant head (stage height) over several hours was not achieved as the discharge. A relatively
constant head of approximately 3.5 feet was achieved in the later periods of the test during which
the average discharge was approximately 206 gpm which is equivalent to about 300,000 gpd. This
test demonstrated that HRI #2 can infiltrate at least 383,000 gpd and can infiltrate a sustained
300,000 gpd with an operating water level of 3.5 feet or 1.5 feet less than the basin stage limit.
March 7-8, 2019
For this test, flow from the WWTP and supplement water from the GWI were discharged to HRI
#1. The test data are presented on Table 8. Figure 16 presents the data graphs for this test. For
the first eight hours inflow to the basin was generally constant with a high inflow rate of 495 gpm,
and an average inflow of 480 gpm (equivalent to approximately 691,000 gpd). As shown on
Figure 16, a steady state constant head of approximately three feet was achieved during the early,
high discharge rate, test period. Although the early period high inflow rate could not be sustained
a relatively constant head of approximately 2.2 feet was achieved in the later periods of the test
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
during which the average inflow rate was approximately 252 gpm which is equivalent to about
363,000 gpd. Total loading to HRI #1 over a 24-hour period was 472,000 gallons.
This test demonstrated that HRI #1 can infiltrate at least 472,000 gpd. The data also indicate the
HRI #1 can infiltrate approximately 691,000 gpd with an operational stage height of approximately
3 feet or two feet below the maximum stage limit.
March 13-14
For this test, flow from the WWTP and supplement water from the GWI were discharged to HRI
# 1 and HRI #2. The test data are presented on Table 9. Figures 17 and 18 present the data graphs
for this test. For the first four hours of the test inflow to the basins decreased from an initial high
of over 460 gpm in HRI #1 and 390 gpm in HRI #2. The maximum stage levels of 3.1 and 3.95
in HRI #1 and #2, respectively, were achieved in the first five hours of the test after which stage
levels dropped to the constant head levels presented below.
Over the remainder of the test inflow to the basins was generally constant with an average inflow
of 292 gpm to HRI #1 and 225 gpm to HRI #2. Total loading to both HRI Basins over a 24-hour
period was approximately 794,000 gallons, with 417,000 gpd going into HRI # 1 and 329,000 going
into HRI #2 simultaneously over the 24-hour test period. Constant head in the basins were
achieved during the last 16 hours of the test. The data indicate HRI #1 had a sustained infiltration
of 292 gpm (equivalent to 420,000 gpd) and that HRI #2 had a sustained infiltration rate of 225
gpm (equivalent to 324,000 gpd). The operating water levels at these sustained rates were
approximately 2.5 feet in HRI #1 and 3.75 feet in HRI #2.
This 24-hour test was the most vigorous and comprehensive test of the HRI basins. The 794,000
gallons of inflow to the basins was more than twice the inflow of the February 28-March 1 test,
and over 300,000 gallons more than the March 7-8 test.
Moreover, both basins received sustained inflows whereas the inflows during the previous tests
were directed to a single basin. The basins are in direct hydraulic communication through the
central engineered material. Therefore, as water levels rise in one basin due to inflow, water levels
in the other basin will also rise as water flows through the engineered material and seeks a static
level. The one day (and monthly) test data indicate some heterogeneity in the hydraulic
performance of the two basins. This difference is most evident in the March 13-14 data where
water levels in HRI #2 were constantly about 1.2 feet higher than HRI # 1.
This test demonstrated that both basins can infiltrate at least 794,000 gpd. The data also indicate
the basins can infiltrate approximately over 740,000 gpd on a sustained basis with operational
stage heights of approximately 2.5 and 1.25 feet below the maximum stage limit.
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Pluris Pilot Test Results and Infiltration Capacity
Hampstead, North Carolina
4.0 RESULTS AND CONCLUSIONS
The results of our analysis of the cumulative November to April monthly data indicate the potential
infiltration capacity of HRI #1 is approximately 791,000 gpd at a stage height of 5 feet (maximum
with 2 feet of freeboard). The potential infiltration rate at HRI 2 is approximately 427,000 gpd at
a stage height of 5 feet. The calculated HRI basin infiltration rates. The averages of the maximum
infiltration rates at the maximum stage height of five feet using the individual monthly data from
November 2018 to April 2019 are 791,000 gpd and 445,000 gpd for HRI #1 and #2, respectively
which are very similar to the maximum rates presented above for the six month cumulative data.
The 24-hour constant head test data test indicate that HRI #1 and HRI #2 can infiltrate at least
472,000 and 383,000 gpd, respectively at a static water level well below the maximum operating
level five feet. Both basins appear to obtain near steady state water levels under even higher
loading rates equivalent to over 600,000 gpd.
The six-month long infiltration study combined with the 24-hour constant head tests clearly
demonstrate that the HRI basins have the capacity to infiltrate significantly more water than the
permit capacity of 50,000 gpd.
3e Project Number 18-500 9 July 2019

APPENDIX A:
MONTHLY PILOT TEST DATA

Table Al: Pluris Hampstead Monthly Pilot Test Data - November 2018
Month
Date
Time
HRI Basin #1
HRI Basin #2
Precipitation
(inches)
Depth
to Groundwater (ft)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Well 1
Well 2
Well 3
1
6:45
0.61
39,891
0.73
12,030
0
8.17
6.5
7.67
2
6:45
0.43
37,849
0.73
0
0.6
8.08
6.42
7.67
3
7:00
0.35
73,283
0.2
0
0
No Data
No Data
No Data
4
7:00
0.77
54,330
0.23
0
0
No Data
No Data
No Data
5
8:15
0.5
39,475
0.76
0
0.7
7.83
6.5
7.5
6
6:45
0.46
92,506
0.68
0
0
7.83
6.42
7.5
7
7:00
0.52
65,430
0.68
0
0
7.92
6.42
7.5
8
8:31
0.08
58,306
1.29
0
0.3
7.92
6.67
7.58
9
6:45
0.17
18,745
1.35
41,025
0
7.92
6.42
7.5
10
7:00
0.1
0
1.29
52,852
0
No Data
No Data
No Data
11
7:00
0.06
0
0.97
41,721
0
No Data
No Data
No Data
12
7:00
0.28
0
1.75
40,456
0.5
No Data
No Data
No Data
13
7:45
0.21
0
1.56
49,260
1
7.75
6.33
7.08
14
7:30
0.15
0
1.43
87,750
0
7.58
6.33
7.08
r;
15
8:00
0.23
0
1.8
49,089
0.4
7.5
6.17
7
Z
16
6:45
0.19
0
1.37
55,108
0.9
7.25
6.17
6.67
17
7:00
0.06
0
1.32
72,582
0
No Data
No Data
No Data
18
7:00
0.66
0
1.56
41,961
0
No Data
No Data
No Data
19
9:00
0.86
0
0.89
43,886
0
7.58
6.25
7.17
20
7:45
0.59
71,727
0.89
15,043
0.5
7.25
6.25
7
21
9:00
0.46
65,285
0.73
0
0.1
7.67
6.42
7.17
22
7:00
0.41
59,953
0.65
0
0
No Data
No Data
No Data
23
7:00
0.43
33,169
0.49
0
0
No Data
No Data
No Data
24
7:00
0.48
40,158
1.03
0
0
No Data
No Data
No Data
25
7:00
0.43
55,943
0.79
0
0
No Data
No Data
No Data
26
6:45
0.26
50,980
1.98
0
2
7.42
6.17
7.17
27
7:45
0.12
10,130
1.24
83,005
0.1
7.42
6.33
7
28
8:01
0.08
0
1.59
70,011
0
7.67
6.42
7
29
7:30
10.03
0
11.88
64,576
10
17.67
6.5
7.17
30
8:30
10.03
0
11.69
59,571
10
17.75
6.5
7.17

Table A2: Pluris Hampstead Monthly Pilot Test Data - December 2018
Month
Date
Time
HRI Basin #1
HRI Basin #2
Precipitation
(inches)
Depth
to Groundwater (ft)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Well 1
Well 2
Well 3
1
10:01
0.12
0
1.53
64,644
0
No Data
No Data
No Data
2
4:00
0.03
0
1.51
50,449
0
No Data
No Data
No Data
3
8:00
0.57
0
1.11
53,069
0.5
7.5
6.5
7.42
4
7:30
0.52
36,024
0.61
22,280
0
7.58
6.58
7.58
5
8:00
0.59
58,585
0.56
0
0
7.75
6.67
7.42
6
8:00
0.61
56,789
0.64
0
0
7.83
6.67
7.5
7
8:00
0.61
55,518
0.59
0
0
7.75
6.67
7.5
8
8:47
0.99
54,586
0.82
0
0
No Data
No Data
No Data
9
12:35
0.83
49,277
0.89
0
1.2
No Data
No Data
No Data
10
6:46
0.23
65,265
1.5
0
1.2
7.67
6.67
7.42
11
7:45
0.1
13,419
1.57
77,085
0
7.08
6.5
6.83
12
8:00
0.03
0
1.2
56,470
0
7.33
6.58
7
13
7:30
0.1
0
1.38
45,402
0
7.42
6.67
7.25
14
8:15
0.35
0
1.54
89,325
0.1
7.5
6.58
7.33
00
15
8:00
0.28
0
1.01
69,671
2.1
No Data
No Data
No Data
16
8:00
0.41
0
1.15
73,119
0
No Data
No Data
No Data
A
17
6:22
0.66
0
0.71
55,663
0
7.08
6.33
6.75
18
7:45
0.99
50,586
0.31
10,107
0
7.25
6.5
7
19
11:15
0.77
62,394
0.69
0
0
7.42
6.5
7.17
20
8:03
0.81
66,085
0.78
0
0
7.33
6.5
7.25
21
8:00
0.63
70,875
0.62
0
0.1
6.83
6.33
6.75
22
8:00
0.72
59,884
0.48
0
0.7
No Data
No Data
No Data
23
8:00
0.63
51,888
0.66
0
0
No Data
No Data
No Data
24
8:00
0.17
45,201
1.36
0
0
No Data
No Data
No Data
25
8:00
0.1
15,582
1.24
40,050
0
No Data
No Data
No Data
26
8:00
0.03
0
1.5
40,519
0
7.58
6.67
7.67
27
10:30
0.03
0
1.36
49,431
0
7.58
6.58
7.58
28
8:00
0.15
0
1.61
54,980
0.2
7.5
6.58
7.58
29
8:00
10.08
0
1.01
57,739
10
jNo Data
No Data
No Data
30
8:00
10.03
0
1.4
53,131
10
jNo Data
No Data
No Data
31
8:30
10.59
0
0.71
34,689
10.8
17.42
6.42
7.25

Table A3: Pluris Hampstead Monthly Pilot Test Data -January 2019
Month
Date
Time
HRI Basin #1
HRI Basin #2
Precipitation
(inches)
Depth
to Groundwater (ft)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Well 1
Well
Well
1
8:00
0.77
59,481
0.55
0
0.1
No Data
No Data
No Data
2
8:00
0.77
62,271
0.59
0
0
7.5
6.5
7.5
3
8:45
0.68
61,181
0.62
0
0
7.58
6.5
7.5
4
8:00
0.61
61,839
0.66
0
0
7.5
6.5
7.58
5
8:01
0.41
55,517
0.57
0
0.5
No Data
No Data
No Data
6
8:01
0.68
22,381
0.78
0
0
No Data
No Data
No Data
7
9:30
0.21
3,738
1.47
83,635
0.1
7.58
6.58
7.58
8
7:45
0.08
0
1.29
55,832
0
7.67
6.42
7.67
9
8:00
0.01
0
1.5
57,367
0
7.58
6.58
7.58
10
8:00
0.01
0
1.43
61,980
0
7.58
6.58
7.58
11
8:30
0.01
0
1.34
61,743
0
7.83
6.58
7.67
12
8:00
0.01
0
1.38
50,588
0
No Data
No Data
No Data
13
8:00
0.03
0
1.4
28,439
0.2
No Data
No Data
No Data
14
7:45
0.99
68,675
0.99
3,839
0
7.83
6.58
7.75
o�
15
8:30
0.68
61,529
0.71
0
0
7.92
6.5
7.75
16
8:00
0.55
54,026
0.45
0
0
7.83
6.5
7.75
17
8:01
0.86
46,750
0.57
0
0
7.92
6.58
7.83
18
11:30
0.7
61,950
0.66
0
0
7.92
6.5
8
19
8:01
0.63
58,798
0.64
0
0
No Data
No Data
No Data
20
8:01
0.66
52,259
0.59
0
0.2
No Data
No Data
No Data
21
8:01
0.1
15,106
1.36
37,078
0
8
6.58
7.92
22
8:01
0.08
0
1.47
61,339
0
8
6.58
7.92
23
8:16
0.7
0
2.01
66,809
2
8
6.5
7.83
24
8:16
0.35
0
1.59
77,343
0.3
7.5
6.08
7.25
25
7:46
0.19
0
1.29
53,603
0
7.17
6.25
6.92
26
8:01
0.08
0
1.24
45,688
0
No Data
No Data
No Data
27
8:01
0.03
0
1.31
43,325
0
No Data
No Data
No Data
28
7:31
0.7
31,945
0.62
7,189
0
7.25
6.33
7.67
29
8:31
10.8
51,295
0.65
0
0
7.33
7
7.58
30
9:46
10.46
163,072
0.64
0
0
7.42
6.92
17.75
31
12:01
10.97
144,427
0.99
10
0
7.5
16.58
17.75

Table A4: Pluris Hampstead Monthly Pilot Test Data -February 2019
Month
Date
Time
HRI Basin #1
HRI Basin #2
Precipitation
(inches)
Depth
to Groundwater (ft)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Well 1
Well 2
Well 3
1
7:46
0.86
84,056
0.62
0
0
7.83
6.58
7.58
2
8:01
0.77
58,441
0.66
0
0
No Data
No Data
No Data
3
8:01
0.81
63,650
0.71
0
0.2
No Data
No Data
No Data
4
8:01
0.23
12,918
1.54
64,224
0.1
8
6.5
7.58
5
7:16
0.1
0
1.45
67,335
0
7.75
6.42
7.67
6
7:30
0.03
0
1.66
64,746
0
7.83
6.5
7.67
7
12:16
0.03
0
1.31
61,127
0
7.75
6.42
7.67
8
7:46
0.06
0
1.34
52,721
0
7.83
6.5
7.67
9
8:01
0.08
0
1.27
47,996
0
No Data
No Data
No Data
10
8:01
0.08
0
1.24
42,483
0
No Data
No Data
No Data
11
7:31
0.66
46,091
0.69
4,937
0
7.92
6.5
7.58
12
7:46
0.81
58,859
0.73
0
0.3
7.92
6.42
7.67
13
9:16
0.79
51,491
0.87
0
0.1
7.92
6.42
7.75
r;
14
9:30
0.66
49,139
0.55
0
0
7.92
6.5
7.75
15
7:45
0.68
53,820
0.64
0
0
7.75
6.42
7.83
16
8:01
0.61
47,553
0.59
0
0.2
No Data
No Data
No Data
17
8:01
0.72
47,261
0.59
0
0.1
No Data
No Data
No Data
18
8:16
0.17
12,121
1.27
50,705
0
8
6.5
7.83
19
7:45
0.08
0
1.36
53,297
0
8.08
6.5
7.83
20
9:03
0.08
0
1.36
60,128
0.2
8
6.5
7.75
21
8:30
0.01
0
1.38
58,005
0.3
7.92
6.5
7.75
22
9:00
0.08
0
1.75
57,373
0
7.92
7
7.83
23
11:00
0.01
0
1.57
53,028
0.3
7.75
6.42
7.83
24
11:16
0.03
0
1.24
50,376
0.1
No Data
No Data
No Data
25
8:30
0.57
33,886
0.69
18,147
0
7.92
6.67
7.83
26
6:30
0.61
49,003
0.71
0
0
8
6.42
17.75
27
7:15
0.701
55,482
0.52
0
0
8
6.42
17.75
28
7:30
0.57
14,800
3.26
271,004
0
8.08
6.42
17.75

Table A5: Pluris Hampstead Monthly Pilot Test Data -March 2019
Month
Date
Time
HRI Basin #1
HRI Basin #2
Precipitation
(inches)
Depth
to Groundwater (ft)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Well 1
Well 2
Well 3
1
7:31
0.57
45,485
1.2
103,872
0
8
6.33
7.67
2
8:00
0.37
43,782
0.54
0
0.3
No Data
No Data
No Data
3
8:00
0.77
48,035
0.91
0
0.5
No Data
No Data
No Data
4
7:45
0.35
33,464
1.46
31,668
1.5
7.42
6.75
6.92
5
10:01
0.19
0
1.79
59,845
0.4
7.17
6.17
6.75
6
10:15
0.1
0
1.11
56,400
0.1
7.33
6.25
6.75
7
7:00
1.78
369,603
1.16
8,386
0
7.25
6.25
7
8
7:00
0.27
98,391
1.13
47,449
0
7.5
6.08
6.92
9
8:00
0.13
0
1.18
51,503
0
No Data
No Data
No Data
10
10:45
0.07
0
1.27
48,452
0
No Data
No Data
No Data
11
10:45
0.62
42,192
0.76
18,346
0.2
7.67
6.42
7.33
12
7:45
0.58
52,821
0.61
0
0
7.92
6.33
7.33
13
7:31
2.45
320,761
3.72
266,258
0
7.83
6.33
7.42
14
8:00
0.55
171,087
0.98
124,077
0
7.83
6.08
7.17
?�
15
8:00
0.62
48,753
0.68
4,774
0
7.83
6.33
7.42
16
8:00
0.62
47,426
0.64
0
0
No Data
No Data
No Data
17
8:00
0.39
26,186
0.51
0
0
No Data
No Data
No Data
18
8:00
0.35
9,166
1.38
55,883
0
8.08
6.42
7.67
19
8:45
0.37
0
1.48
54,111
0
8.08
6.5
7.67
20
8:00
0.41
0
1.54
53,291
0
7.75
6.42
7.42
21
7:45
0.25
0
1.36
62,450
1.3
7.75
6.17
7.25
22
8:00
0.11
0
1.18
56,073
0
7.67
6.23
7.25
23
8:00
0.03
0
1.22
48,232
0
No Data
No Data
No Data
24
8:01
0.01
0
1.22
47,747
0
No Data
No Data
No Data
25
9:00
0.58
38,194
0.78
9,822
0
7.92
6.33
7.5
26
8:00
0.65
42,149
0.65
0
0
7.92
6.33
7.5
27
7:45
0.7
42,905
0.62
0
0.1
8
6.42
7.58
28
8:01
0.57
44,861
0.62
0
0
8.08
6.5
7.67
29
7:30
10.2
24,741
0.57
0
0
18.08
6.5
7.58
30
8:01
10.7
151,565
0.62
10
0
jNo Data
jNo Data
No Data
31
8:01
10.7
150,197
0.87
10
0
jNo Data
INo Data ]No
Data

Table A6: Pluris Hampstead Monthly Pilot Test Data -April 2019
Month
Date
Time
HRI Basin #1
HRI Basin #2
Precipitation
(inches)
Depth
to Groundwater (ft)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Stage (feet
abv. basin
bottom)
Inflow (GPD)
Well 1
Well 2
Well 3
1
10:00
0.22
11,909
1.58
42,477
0.4
8.25
6.42
7.75
2
8:00
0.28
0
1.7
70,328
1.1
8.25
6.25
7.67
3
9:30
0.11
0
1.65
63,058
0
7.75
6.33
7.33
4
9:15
0.07
0
1.5
62,297
0
7.75
6.25
7.33
5
8:30
0.3
0
1.48
74,450
1.1
7.67
6.67
7.33
6
8:01
0.16
0
1.23
50,838
0
No Data
No Data
No Data
7
8:01
0.11
0
1.33
63,345
0
No Data
No Data
No Data
8
7:15
0.65
20,421
0.94
37,333
0
7.5
6.17
6.92
9
9:45
0.76
51,847
0.75
0
0
7.67
6.17
7
10
9:00
0.59
47,914
0.65
0
0
7.75
6.25
7.08
11
7:45
0.78
57,427
0.87
0
0
7.83
6.25
7.25
12
8:15
0.63
64,638
0.65
0
0
7.92
6.25
7.33
13
8:01
0.65
62,508
0.72
0
0.3
No Data
No Data
No Data
14
8:01
0.8
53,600
0.65
0
0.8
No Data
No Data
No Data
r;
15
8:00
0.16
15,419
1.23
35,784
0
7.67
6.25
7.33
d
16
9:30
0.03
0
1.38
39,995
0
7.83
6.42
7.42
17
9:15
0.03
0
1.31
43,152
0
7.92
6.33
7.5
18
7:45
0.1
0
1.36
49,155
0
7.92
6.42
7.5
19
8:15
0.32
0
1.38
50,366
0
7.92
6.33
7.5
20
8:00
0.14
0
1.36
53,740
0
No Data
No Data
No Data
21
8:01
0.07
0
1.45
46,715
1
No Data
No Data
No Data
22
7:45
0.61
48,480
0.79
8,012
0
7.75
6.33
7.75
23
7:30
0.76
72,520
0.65
0
0
7.75
6.33
7.33
24
8:45
0.72
73,030
0.65
0
0
7.83
6.33
7.42
25
7:45
0.74
72,140
0.67
0
0
7.92
6.33
7.5
26
8:45
0.63
67,215
0.62
0
0
8
6.33
7.5
27
8:01
0.47
60,124
0.57
0
0
No Data
No Data
No Data
28
8:01
0.65
56,443
0.62
0
0
No Data
No Data
No Data
29
7:01
10.14
20,185
11.48
51,448
10
18.17
6.5
7.67
30
8:16
1
0
1
58,409
10
18.17
6.5
7.75

TABLES

Table 1: Water Balance Calculations - November 2018
Month
Date
Time
HRI Basin #1
Stage (feet abv
basin bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflo
(GPD) w
Calculated
Infiltration
(GPD)
1
6:45
0.61
39,891
720
5,390
0
0
0
39,891
2
6:45
0.43
37,849
441
3,301
-2,089
0.6
376
2,812
40,661
42,750
3
7:00
0.35
73,283
441
3,301
0
0
0
0
73,283
73,283
4
7:00
0.77
54,330
326
2,442
-858
0
0
0
54,330
55,188
5
8:15
0.5
39,475
993
7,429
4,987
0.7
439
3,281
42,756
37,768
6
6:45
0.46
92,506
546
4,087
-3,342
0
0
0
92,506
95,848
7
7:00
0.52
65,430
486
3,634
-453
0
0
0
65,430
65,883
8
8:31
0.08
58,306
577
4,318
684
0.3
188
1,406
59,712
59,028
9
6:45
0.17
18,745
0
0
-4,318
0
0
0
18,745
23,063
10
7:00
0.1
0
89
668
668
0
0
0
0
-668
11
7:00
0.06
0
5
37
-631
0
0
0
0
631
12
7:00
0.28
0
0
0
-37
0.5
313
2,343
2,343
2,380
13
7:45
0.21
0
231
1,726
1,726
1
627
4,687
4,687
2,961
14
7:30
0.15
0
139
1,043
-683
0
0
0
0
683
r;
15
8:00
0.23
0
65
484
-559
0.4
251
1,875
1,875
2,434
0
z
16
6:45
0.19
0
165
1,235
751
0.9
564
4,218
4,218
3,467
17
7:00
0.06
0
114
854
-381
0
0
0
0
381
18
7:00
0.66
0
0
0
-854
0
0
0
0
854
19
9:00
0.86
0
803
6,008
6,008
0
0
0
0
-6,008
20
7:45
0.59
71,727
1,157
8,653
2,644
0.5
313
2,343
74,070
71,426
21
9:00
0.46
65,285
688
5,147
-3,506
0.1
63
469
65,754
69,260
22
7:00
0.41
59,953
486
3,634
-1,513
0
0
0
59,953
61,466
23
7:00
0.43
33,169
412
3,082
-552
0
0
0
33,169
33,721
24
7:00
0.48
40,158
441
3,301
219
0
0
0
40,158
39,939
25
7:00
0.43
55,943
516
3,859
558
0
0
0
55,943
55,385
26
6:45
0.26
50,980
441
3,301
-558
2
1,253
9,374
60,354
60,912
27
7:45
0.12
10,130
204
1,528
-1,773
0.1
63
469
10,599
12,371
28
8:01
0.08
0
29
214
-1,314
0
0
0
0
1,314
29
7:30
10.03
0
0
0
-214
0
10
0
10
1214
30
8:30
10.03
10
10
10
10
10
10
0
10
10

Table 1: Water Balance Calculations - November 2018
Month
Date
Time
HRI Basin #$2
Stage (ft
above basin
bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
6:45
0.73
12,030
923
6,903
0
0
0
12,030
2
6:45
0.73
0
923
6,903
0
1
376
2,812
2,812
2,812
3
7:00
0.2
0
923
6,903
0
0
0
0
0
0
4
7:00
0.23
0
127
949
-5,955
0
0
0
0
5,955
5
8:15
0.76
0
165
1,235
287
1
439
3,281
3,281
2,994
6
6:45
0.68
0
975
7,297
6,062
0
0
0
0
-6,062
7
7:00
0.68
0
837
6,261
-11036
0
0
0
0
1,036
8
8:31
1.29
0
837
6,261
0
0
188
1,406
1,406
1,406
9
6:45
1.35
41,025
0
0
-6,261
0
0
0
41,025
47,286
10
7:00
1.29
52,852
2,175
16,268
16,268
0
0
0
52,852
36,584
11
7:00
0.97
41,721
2,038
15,249
-1,019
0
0
0
41,721
42,740
12
7:00
1.75
40,456
0
0
-15,249
1
313
2,343
42,799
58,048
13
7:45
1.56
49,260
3,166
23,682
23,682
1
627
4,687
53,947
30,265
14
7:30
1.43
87,750
2,677
20,026
-3,656
0
0
0
87,750
91,406
r;
15
8:00
1.8
49,089
2,361
17,665
-2,362
0
251
1,875
50,964
53,325
0
z
16
6:45
1.37
55,108
3,300
24,685
7,020
1
564
4,218
59,326
52,306
17
7:00
1.32
72,582
2,221
16,613
-8,072
0
0
0
72,582
80,654
18
7:00
1.56
41,961
0
0
-16,613
0
0
0
41,961
58,574
19
9:00
0.89
43,886
2,677
20,026
20,026
0
0
0
43,886
23,860
20
7:45
0.89
15,043
1,213
9,072
-10,954
1
313
2,343
17,386
28,340
21
9:00
0.73
0
1,213
9,072
0
0
63
469
469
469
22
7:00
0.65
0
923
6,903
-2,169
0
0
0
0
2,169
23
7:00
0.49
0
786
5,883
-1,020
0
0
0
0
1,020
24
7:00
1.03
0
531
3,973
-1,911
0
0
0
0
1,911
25
7:00
0.79
0
1,485
11,112
7,139
0
0
0
0
-7,139
26
6:45
1.98
0
1,029
7,697
-3,415
2
1,253
9,374
9,374
12,789
27
7:45
1.24
83,005
3,801
28,433
20,737
0
63
469
83,474
62,737
28
8:01
1.59
70,011
1,927
14,418
-14,015
0
0
0
70,011
84,026
29
7:30
18:30
1.88
11.69
64,576
0
0
-14,418
0
0
0
64,576
78,994
30
59,571
0
0
0
0
0
0
59,571
159,571

Table 2: Water Balance Calculations - December 2018
Month
Date
Time
HRI Basin #1
Stage (feet abv
basin bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
10:01
0.12
0
0
0
0
0
0
0
0
0
2
4:00
0.03
0
29
214
214
0
0
0
0
-214
3
8:00
0.57
0
0
0
-214
0.5
313
2,343
2,343
2,557
4
7:30
0.52
36,024
656
4,906
4,906
0
0
0
36,024
158,585
31,118
5
8:00
0.59
58,585
577
4,318
-589
0
0
0
59,174
6
8:00
0.61
56,789
688
5,147
829
0
0
0
56,789
55,960
7
8:00
0.61
55,518
720
5,390
243
0
0
0
55,518
55,275
8
8:47
0.99
54,586
720
5,390
0
0
0
0
54,586
54,586
9
12:35
0.83
49,277
1,406
10,516
5,126
1.2
752
5,624
54,901
49,775
10
6:46
0.23
65,265
1,101
8,239
-2,277
1.2
752
5,624
70,889
73,166
11
7:45
0.1
13,419
165
1,235
-7,004
0
0
0
13,419
20,423
12
8:00
0.03
0
5
37
-1,198
0
0
0
0
1,198
13
7:30
0.1
0
0
0
-37
0
0
0
0
37
14
8:15
0.35
0
5
37
37
0.1
63
469
469
432
00
15
8:00
0.28
0
326
2,442
2,405
2.1
1,316
9,843
9,843
7,437
r.
16
8:00
0.41
0
231
1,726
-716
0
0
0
0
716
C
17
6:22
0.66
0
412
3,082
1,356
0
0
0
0
-1,356
18
7:45
0.99
50,586
803
6,008
2,927
0
0
0
50,586
47,659
19
11:15
0.77
62,394
1,406
10,516
4,507
0
0
0
62,394
57,887
20
8:03
0.81
66,085
170,875
993
7,429
-3,086
0
0
0
66,085
69,171
21
8:00
0.63
1,065
7,966
537
0.1
63
469
71,344
70,807
22
8:00
0.72
59,884
753
5,635
-2,331
0.7
439
3,281
63,165
65,496
23
8:00
0.63
51,888
905
6,773
1,138
0
0
0
51,888
50,750
24
8:00
0.17
45,201
753
5,635
-1,138
0
0
0
45,201
46,339
25
8:00
0.1
15,582
89
668
-4,967
0
0
0
15,582
20,549
26
8:00
0.03
0
5
37
-631
0
0
0
0
631
27
10:30
0.03
0
0
0
-37
0
0
0
0
37
28
8:00
0.15
0
0
0
0
0.2
125
937
937
937
29
8:00
0.08
0
65
484
484
0
0
0
0
-484
30
8:00
0.03
0
0
0
-484
0
0
0
0
484
31
8:30
0.59
10
10
10
10
10.8
501
13,750
3,750
3,750

Table2: Water
Balance Calculations - December 2018
Month
Date
Time
HRI Basin #2
Stage (ft
above basin
bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
10:01
1.53
64,644
0
0
0
0
0
0
64,644
64,644
2
4:00
1.51
50,449
2,603
19,471
19,471
0
0
0
50,449
30,978
3
8:00
1.11
53,069
0
0
-19,471
1
313
2,343
55,412
74,884
4
7:30
0.61
22,280
1,649
12,336
12,336
0
0
0
22,280
9,944
5
8:00
0.56
0
720
5,390
-6,947
0
0
0
0
6,947
6
8:00
0.64
0
640
4,787
-602
0
0
0
0
602
7
8:00
0.59
0
770
5,759
972
0
0
0
0
-972
8
8:47
0.82
0
688
5,147
-612
0
0
0
0
612
9
12:35
0.89
0
1,083
8,102
2,956
1
752
5,624
5,624
2,669
10
6:46
1.5
0
1,213
9,072
970
1
752
5,624
5,624
4,654
11
7:45
1.57
77,085
2,530
18,922
9,850
0
0
0
77,085
67,235
12
8:00
1.2
56,470
2,702
20,213
1,290
0
0
0
56,470
55,180
13
7:30
1.38
45,402
0
0
-20,213
0
0
0
45,402
65,615
14
8:15
1.54
89,325
2,244
16,787
16,787
0
63
469
89,794
73,007
00
15
8:00
1.01
69,671
2,628
19,656
2,869
2
1,316
9,843
79,514
76,645
r.
L
16
8:00
1.15
73,119
1,445
10,812
-8,843
0
0
0
73,119
81,962
17
6:22
0.71
55,663
1,733
12,965
2,152
0
0
0
55,663
53,511
18
7:45
0.31
10,107
888
6,644
-6,320
0
0
0
10,107
16,427
19
11:15
0.69
0
271
2,029
-4,615
0
0
0
0
4,615
20
8:03
0.78
0
854
6,388
4,359
0
0
0
0
-4,359
21
8:00
0.62
0
1,011
7,563
1,175
0
63
469
469
-706
22
8:00
0.48
0
737
5,512
-2,051
1
439
3,281
3,281
5,332
23
8:00
0.66
0
516
3,859
-1,653
0
0
0
0
1,653
24
8:00
1.36
0
803
6,008
2,150
0
0
0
0
-2,150
25
8:00
1.24
40,050
2,198
16,440
10,432
0
0
0
40,050
29,618
26
8:00
1.5
40,519
1,927
14,418
-2,022
0
0
0
40,519
42,541
27
10:30
1.36
49,431
0
0
-14,418
0
0
0
49,431
63,849
28
8:00
1.61
54,980
0
0
0
0
125
937
55,917
55,917
29
8:00
1.01
57,739
2,803
20,965
20,965
0
0
0
57,739
36,774
30
8:00
1.4
153,131
10
0
-20,965
10
0
0
53,131
74,096
31
8:30
10.71
134,689
10
10
10
11
1501
13,750
138,439
138,439

Table 3: Water Balance Calculations - January 2019
Month
Date
Time
HRI Basin #1
Stage (feet abv
basin bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
8:00
0.77
59,481
688
5,147
5,147
0.1
63
469
59,950
54,803
2
8:00
0.77
62,271
993
7,429
2,283
0
0
0
62,271
59,988
3
8:45
0.68
61,181
993
7,429
0
0
0
0
61,181
61,181
4
8:00
0.61
61,839
837
6,261
-1,169
0
0
0
61,839
157,860
63,008
5
8:01
0.41
55,517
720
5,390
-871
0.5
313
2,343
58,732
6
8:01
0.68
22,381
412
3,082
-2,308
0
0
0
22,381
24,689
7
9:30
0.21
3,738
837
6,261
3,179
0.1
63
469
4,207
1,028
8
7:45
0.08
0
139
1,043
-5,217
0
0
0
0
5,217
9
8:00
0.01
0
0
0
-1,043
0
0
0
0
1,043
10
8:00
0.01
0
0
0
0
0
0
0
0
0
11
8:30
0.01
0
0
0
0
0
0
0
0
0
12
8:00
0.01
0
0
0
0
0
0
0
0
0
13
8:00
0.03
0
0
0
0
0.2
125
937
937
937
14
7:45
0.99
68,675
0
0
0
0
0
0
68,675
68,675
o,
15
8:30
0.68
61,529
1,406
10,516
10,516
0
0
0
61,529
51,013
16
8:00
0.55
54,026
837
6,261
-4,255
0
0
0
54,026
58,281
ti
17
8:01
0.86
46,750
624
4,669
-1,592
0
0
0
46,750
48,342
18
11:30
0.7
61,950
1,157
8,653
3,984
0
0
0
61,950
57,966
19
8:01
0.63
58,798
871
6,516
-2,137
0
0
0
58,798
60,935
20
8:01
0.66
52,259
753
5,635
-881
0.2
125
937
53,196
54,077
21
8:01
0.1
15,106
803
6,008
373
0
0
0
15,106
14,733
22
8:01
0.08
0
5
37
-5,972
0
0
0
0
5,972
23
8:16
0.7
0
0
0
-37
2
1,253
9,374
9,374
9,411
24
8:16
0.35
0
871
6,516
6,516
0.3
188
1,406
1,406
-5,110
25
7:46
0.19
0
326
2,442
-4,074
0
0
0
0
4,074
26
8:01
0.08
0
114
854
-1,588
0
0
0
0
1,588
27
8:01
0.03
0
0
0
-854
0
0
0
0
854
28
7:31
0.7
31,945
0
0
0
0
0
0
31,945
31,945
29
8:31
0.8
51,295
871
6,516
6,516
0
0
0
51,295
44,779
30
9:46
0.46
63,072
1,047
7,831
1,315
0
0
0
63,072
61,757
31
12:01
10.97
144,427
1486
13,634
-4,198
10
10
10
144,427
148,625

Table 3: Water Balance Calculations - January 2019
Month
Date
Time
HRI Basin #2
Stage (ft
above basin
bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
8:00
0.55
0
888
6,644
6,644
0
63
469
469
-6,176
2
8:00
0.59
0
624
4,669
-1,975
0
0
0
0
1,975
3
8:45
0.62
0
688
5,147
478
0
0
0
0
-478
4
8:00
0.66
0
737
5,512
365
0
0
0
0
-365
5
8:01
0.57
0
803
6,008
497
1
313
2,343
2,343
1,847
6
8:01
0.78
0
656
4,906
-1,102
0
0
0
0
1,102
7
9:30
1.47
83,635
1,011
7,563
2,656
0
63
469
84,104
81,448
8
7:45
1.29
55,832
2,457
18,379
10,817
0
0
0
55,832
45,015
9
8:00
1.5
57,367
0
0
-18,379
0
0
0
57,367
75,746
10
8:00
1.43
61,980
0
0
0
0
0
0
61,980
61,980
11
8:30
1.34
61,743
0
0
0
0
0
0
61,743
61,743
12
8:00
1.38
50,588
0
0
0
0
0
0
50,588
50,588
13
8:00
1.4
28,439
0
0
0
0
125
937
29,376
29,376
14
7:45
0.99
3,839
0
0
0
0
0
0
3,839
3,839
o,
15
8:30
0.71
0
1,406
10,516
10,516
0
0
0
0
-10,516
r.
16
8:00
0.45
0
888
6,644
-3,871
0
0
0
0
3,871
17
8:01
0.57
0
471
3,522
-3,122
0
0
0
0
3,122
18
11:30
0.66
0
656
4,906
1,385
0
0
0
0
-1,385
19
8:01
0.64
0
803
6,008
1,102
0
0
0
0
-1,102
20
8:01
0.59
0
770
5,759
-250
0
125
937
937
1,187
21
8:01
1.36
37,078
688
5,147
-612
0
0
0
37,078
37,690
22
8:01
1.47
61,339
2,198
16,440
11,294
0
0
0
61,339
50,045
23
8:16
2.01
66,809
0
0
-16,440
2
1,253
9,374
76,183
92,623
24
8:16
1.59
77,343
3,887
29,079
29,079
0
188
11406
78,749
49,670
25
7:46
1.29
53,603
2,752
20,587
-8,492
0
0
0
53,603
62,095
26
8:01
1.24
45,688
2,038
15,249
-5,339
0
0
0
45,688
51,027
27
8:01
1.31
43,325
0
0
-15,249
0
0
0
43,325
58,574
28
7:31
0.62
7,189
0
0
0
0
0
0
7,189
7,189
29
8:31
0.65
0
737
5,512
5,512
0
0
0
0
-5,512
30
9:46
10.64
0
786
5,883
371
10
10
0
0
-371
31
12:01
10.99
0
1770
15,759
-124
10
10
0
0
1124

Table 4: Water Balance Calculations - February 2019
Month
Date
Time
HRI Basin #1
Stage (feet abv
basin bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
7:46
0.86
84,056
1,366
10,222
6,588
0
0
0
84,056
77,468
2
8:01
0.77
58,441
1,157
8,653
-1,569
0
0
0
58,441
60,010
3
8:01
0.81
63,650
993
7,429
-1,223
0.2
125
937
64,587
65,811
4
8:01
0.23
12,918
1,065
7,966
537
0.1
63
469
13,387
12,850
5
7:16
0.1
0
165
1,235
-6,731
0
0
0
0
6,731
6
7:30
0.03
0
5
37
-1,198
0
0
0
0
1,198
7
12:16
0.03
0
0
0
-37
0
0
0
0
37
8
7:46
0.06
0
0
0
0
0
0
0
0
0
9
8:01
0.08
0
0
0
0
0
0
0
0
0
10
8:01
0.08
0
0
0
0
0
0
0
0
0
11
7:31
0.66
46,091
0
0
0
0
0
0
46,091
46,091
12
7:46
0.81
58,859
803
6,008
6,008
0.3
188
1,406
60,265
54,257
13
9:16
0.79
51,491
1,065
7,966
1,958
0.1
63
469
51,960
50,002
r;
14
9:30
0.66
49,139
1,029
7,697
-270
0
0
0
49,139
49,409
w
15
7:45
0.68
53,820
803
6,008
-1,688
0
0
0
53,820
55,508
16
8:01
0.61
47,553
837
6,261
252
0.2
125
937
48,490
48,238
17
8:01
0.72
47,261
720
5,390
-871
0.1
63
469
47,730
48,601
18
8:16
0.17
12,121
905
6,773
1,384
0
0
0
12,121
10,737
19
7:45
0.08
0
89
668
-6,105
0
0
0
0
6,105
20
9:03
0.08
0
0
0
-668
0.2
125
937
937
1,605
21
8:30
0.01
0
0
0
0
0.3
188
11406
1,406
1,406
22
9:00
0.08
0
0
0
0
0
0
0
0
0
23
11:00
0.01
0
0
0
0
0.3
188
1,406
1,406
1,406
24
11:16
0.03
0
0
0
0
0.1
63
469
469
469
25
8:30
0.57
33,886
0
0
0
0
0
0
33,886
33,886
26
6:30
0.61
49,003
656
14,906
14,906
10
0
0
49,003
44,097
27
7:15
0.701
55,482
720
1873
15,390
1483
10
0
0
55,482
54,999
28
7:30
0.57
114,800
16,529
11,139
10
10
0
114,800
113,661

Table 4: Water Balance Calculations - February 2019
Month
Date
Time
HRI Basin #2
Stage (ft
above basin
bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
7:46
0.62
0
1,406
10,516
4,757
0
0
0
0
-4,757
2
8:01
0.66
0
737
5,512
-5,004
0
0
0
0
5,004
3
8:01
0.71
0
803
6,008
497
0
125
937
937
441
4
8:01
1.54
64,224
888
6,644
636
0
63
469
64,693
64,057
5
7:16
1.45
67,335
2,628
19,656
13,011
0
0
0
67,335
54,324
6
7:30
1.66
64,746
2,409
18,021
-1,635
0
0
0
64,746
66,381
7
12:16
1.31
61,127
0
0
-18,021
0
0
0
61,127
79,148
8
7:46
1.34
52,721
0
0
0
0
0
0
52,721
52,721
9
8:01
1.27
47,996
0
0
0
0
0
0
47,996
47,996
10
8:01
1.24
42,483
0
0
0
0
0
0
42,483
42,483
11
7:31
0.69
4,937
0
0
0
0
0
0
4,937
4,937
12
7:46
0.73
0
854
6,388
6,388
0
188
1,406
1,406
-4,982
13
9:16
0.87
0
923
6,903
515
0
63
469
469
-47
14
9:30
0.55
0
1,175
8,792
1,889
0
0
0
0
-1,889
15
7:45
0.64
0
624
4,669
-4,123
0
0
0
0
4,123
16
8:01
0.59
0
770
5,759
1,090
0
125
937
937
-153
17
8:01
0.59
0
688
5,147
-612
0
63
469
469
1,081
18
8:16
1.27
50,705
688
5,147
0
0
0
0
50,705
50,705
19
7:45
1.36
53,297
1,994
14,914
9,768
0
0
0
53,297
43,529
20
9:03
1.36
60,128
0
0
-14,914
0
125
937
61,065
75,980
21
8:30
1.38
58,005
0
0
0
0
188
1,406
59,411
59,411
22
9:00
1.75
57,373
0
0
0
0
0
0
57,373
57,373
23
11:00
1.57
53,028
0
0
0
0
188
1,406
54,434
54,434
24
11:16
1.24
50,376
0
0
0
0
63
469
50,845
50,845
25
8:30
0.69
18,147
0
0
0
0
0
0
18,147
18,147
26
6:30
0.71
0
854
6,388
6,388
0
0
0
0
-6,388
27
7:15
10.52
10
888
16,644
1256
10
0
10
10
-256
28
7:30
13.26
1271,004
1577
14,318
-2,326
10
0
10
1271,004
1273,330

Table 5: Water Balance Calculations - March 2019
Month
Date
Time
HRI Basin #1
Stage (feet abv
basin bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
7:31
0.57
45,485
656
4,906
-1,622
0
0
0
45,485
47,107
2
8:00
0.37
43,782
656
4,906
0
0.3
188
1,406
45,188
45,188
3
8:00
0.77
48,035
355
2,653
-2,254
0.5
313
2,343
50,378
52,632
4
7:45
0.35
33,464
993
7,429
4,777
1.5
940
7,030
40,494
35,718
5
10:01
0.19
0
326
2,442
-4,987
0.4
251
1,875
1,875
6,862
6
10:15
0.1
0
114
854
-1,588
0.1
63
469
469
2,056
7
7:00
1.78
369,603
5
37
-817
0
0
0
369,603
370,420
8
7:00
0.27
98,391
3,246
24,282
24,245
0
0
0
98,391
74,146
9
8:00
0.13
0
217
1,627
-22,655
0
0
0
0
22,655
10
10:45
0.07
0
41
303
-1,323
0
0
0
0
1,323
11
10:45
0.62
42,192
0
0
-303
0.2
125
937
43,129
43,433
12
7:45
0.58
52,821
737
5,512
5,512
0
0
0
52,821
47,309
13
7:31
2.45
320,761
672
5,026
-486
0
0
0
320,761
321,247
14
8:00
0.55
171,087
5,247
39,248
34,222
0
0
0
171,087
136,865
o,
15
8:00
0.62
48,753
624
4,669
-34,579
0
0
0
48,753
83,332
16
8:00
0.62
47,426
737
5,512
843
0
0
0
47,426
46,583
17
8:00
0.39
26,186
737
5,512
0
0
0
0
26,186
26,186
18
8:00
0.35
9,166
383
2,866
-2,646
0
0
0
9,166
11,812
19
8:45
0.37
0
326
2,442
-424
0
0
0
0
424
20
8:00
0.41
0
355
2,653
211
0
0
0
0
-211
21
7:45
0.25
0
412
3,082
429
1.3
815
6,093
6,093
5,664
22
8:00
0.11
0
191
1,430
-1,652
0
0
0
0
1,652
23
8:00
0.03
0
17
125
-1,304
0
0
0
0
1,304
24
8:01
0.01
0
0
0
-125
0
0
0
0
125
25
9:00
0.58
38,194
0
0
0
0
0
0
38,194
38,194
26
8:00
0.65
42,149
672
5,026
5,026
0
0
0
42,149
37,123
27
7:45
0.7
42,905
786
5,883
857
0.1
63
469
43,374
42,517
28
8:01
0.57
44,861
871
6,516
632
0
0
0
44,861
44,229
29
7:30
0.2
24,741
656
4,906
-1,609
0
0
0
24,741
26,350
30
8:01
0.7
151,565
1127
1949
-3,958
10
10
10
51,565
155,523
31
8:01
0.7
150,197
1871
16,516
15,567
10
10
10
50,197
144,630

Table 5: Water Balance Calculations - March 2019
Month
Date
Time
HRI Basin #2
Stage (ft
above basin
bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
7:31
1.2
103,872
8,205
61,375
57,057
0
0
0
103,872
46,815
2
8:00
0.54
0
1,840
13,765
-47,609
0
188
1,406
1,406
49,015
3
8:00
0.91
0
608
4,551
-9,214
1
313
2,343
2,343
11,557
4
7:45
1.46
31,668
1,251
9,356
4,804
2
940
7,030
38,698
33,894
5
10:01
1.79
59,845
2,433
18,200
8,844
0
251
1,875
61,720
52,876
6
10:15
1.11
56,400
3,273
24,483
6,283
0
63
469
56,869
50,585
7
7:00
1.16
8,386
1,649
12,336
-12,147
0
0
0
8,386
20,533
8
7:00
1.13
47,449
1,754
13,123
787
0
0
0
47,449
46,662
9
8:00
1.18
51,503
1,691
12,649
-474
0
0
0
51,503
51,977
10
10:45
1.27
48,452
1,797
13,443
794
0
0
0
48,452
47,658
11
10:45
0.76
18,346
0
0
-13,443
0
125
937
19,283
32,726
12
7:45
0.61
0
975
7,297
7,297
0
0
0
0
-7,297
13
7:31
3.72
266,258
720
5,390
-1,907
0
0
0
266,258
268,165
14
8:00
0.98
124,077
10,147
75,906
70,516
0
0
0
124,077
53,561
15
8:00
0.68
4,774
1,386
10,368
-65,538
0
0
0
4,774
70,312
16
8:00
0.64
0
837
6,261
-4,107
0
0
0
0
4,107
17
8:00
0.51
0
770
5,759
-502
0
0
0
0
502
18
8:00
1.38
55,883
562
4,202
-1,557
0
0
0
55,883
57,440
19
8:45
1.48
54,111
2,244
16,787
12,585
0
0
0
54,111
41,526
20
8:00
1.54
53,291
2,481
18,560
1,773
0
0
0
53,291
51,518
21
7:45
1.36
62,450
2,628
19,656
1,096
1
815
6,093
68,543
67,447
22
8:00
1.18
56,073
2,198
16,440
-3,215
0
0
0
56,073
59,288
23
8:00
1.22
48,232
1,797
13,443
-2,997
0
0
0
48,232
51,229
24
8:01
1.22
47,747
0
0
-13,443
0
0
0
47,747
61,190
25
9:00
0.78
9,822
0
0
0
0
0
0
9,822
9,822
26
8:00
0.65
0
1,011
7,563
7,563
0
0
0
0
-7,563
27
7:45
0.62
0
786
5,883
-1,679
0
63
469
469
2,148
28
8:01
0.62
0
737
5,512
-371
0
0
0
0
371
29
7:30
0.57
0
737
5,512
0
0
0
0
0
0
30
8:01
0.62
10
656
4,906
-606
0
0
10
10
606
1-606
31
8:01
0.87
10
737
5,512
606
0
0
10
10

Table 6: Water Balance Calculations - April 2019
Month
Date
Time
HRI Basin #1
Stage (feet abv
basin bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
10:00
0.22
11,909
871
6,516
0
0.4
251
1,875
13,784
13,784
2
8:00
0.28
0
152
1,139
-5,377
1.1
689
5,156
5,156
10,532
3
9:30
0.11
0
231
1,726
587
0
0
0
0
-587
4
9:15
0.07
0
17
125
-1,601
0
0
0
0
1,601
5
8:30
0.3
0
0
0
-125
1.1
689
5,156
5,156
5,281
6
8:01
0.16
0
258
1,927
1,927
0
0
0
0
-1,927
7
8:01
0.11
0
77
576
-1,352
0
0
0
0
1,352
8
7:15
0.65
20,421
17
125
-451
0
0
0
20,421
20,872
9
9:45
0.76
51,847
786
5,883
5,758
0
0
0
51,847
46,089
10
9:00
0.59
47,914
975
7,297
1,414
0
0
0
47,914
46,500
11
7:45
0.78
57,427
688
5,147
-2,150
0
0
0
57,427
59,577
12
8:15
0.63
64,638
1,011
7,563
2,416
0
0
0
64,638
62,222
13
8:01
0.65
62,508
753
5,635
-1,928
0.3
188
1,406
63,914
65,842
14
8:01
0.8
53,600
786
5,883
248
0.8
501
3,750
57,350
57,101
r"
15
8:00
0.16
15,419
1,047
7,831
1,948
0
0
0
15,419
13,471
d
16
9:30
0.03
0
77
576
-7,255
0
0
0
0
7,255
17
9:15
0.03
0
0
0
-576
0
0
0
0
576
18
7:45
0.1
0
0
0
0
0
0
0
0
0
19
8:15
0.32
0
5
37
37
0
0
0
0
-37
20
8:00
0.14
0
285
2,131
2,094
0
0
0
0
-2,094
21
8:01
0.07
0
53
393
-1,738
1
627
4,687
4,687
6,425
22
7:45
0.61
48,480
0
0
-393
0
0
0
48,480
48,873
23
7:30
0.76
72,520
720
5,390
5,390
0
0
0
72,520
67,130
24
8:45
0.72
73,030
975
7,297
1,907
0
0
0
73,030
71,123
25
7:45
0.74
72,140
905
6,773
-523
0
0
0
72,140
72,663
26
8:45
0.63
67,215
940
7,034
260
0
0
0
67,215
66,955
27
8:01
0.47
60,124
753
5,635
-1,399
0
0
0
60,124
61,523
28
8:01
0.65
56,443
501
3,746
-1,889
0
0
0
56,443
58,332
29
7:01
0.14
20,185
786
5,883
2,137
0
0
0
20,185
18,048
30
8:16
1
10
153
1393
-5,490
10
10
10
0
15,490

Table 6: Water Balance Calculations - April 2019
Month
Date
Time
HRI Basin #2
Stage (ft
above basin
bottom)
Inflow (GPD)
Volume (cu ft)
Volume (gal)
4STORAGE
(gal)
Precipitation
(inches)
Precipitation
Volume
(cu ft.)
Precipitation
Volume
(gallons)
Total Inflow
(GPD)
Calculated
Infiltration
(GPD)
1
10:00
1.58
42,477
1,175
8,792
3,280
0
251
1,875
44,352
41,072
2
8:00
1.7
70,328
2,727
20,400
11,608
1
689
5,156
75,484
63,876
3
9:30
1.65
63,058
3,034
22,697
2,297
0
0
0
63,058
60,761
4
9:15
1.5
62,297
2,905
21,728
-969
0
0
0
62,297
63,266
5
8:30
1.48
74,450
0
0
-21,728
1
689
5,156
79,606
101,333
6
8:01
1.23
50,838
2,481
18,560
18,560
0
0
0
50,838
32,278
7
8:01
1.33
63,345
1,905
14,254
-4,306
0
0
0
63,345
67,651
8
7:15
0.94
37,333
2,129
15,926
1,672
0
0
0
37,333
35,661
9
9:45
0.75
0
1,308
9,786
-6,140
0
0
0
0
6,140
10
9:00
0.65
0
958
7,165
-2,621
0
0
0
0
2,621
11
7:45
0.87
0
786
5,883
-1,282
0
0
0
0
1,282
12
8:15
0.65
0
1,175
8,792
2,908
0
0
0
0
-2,908
13
8:01
0.72
0
786
5,883
-2,908
0
188
1,406
1,406
4,315
14
8:01
0.65
0
905
6,773
890
1
501
3,750
3,750
2,859
15
8:00
1.23
35,784
786
5,883
-890
0
0
0
35,784
36,674
d
16
9:30
1.38
39,995
1,905
14,254
8,370
0
0
0
39,995
31,625
17
9:15
1.31
43,152
0
0
-14,254
0
0
0
43,152
57,406
18
7:45
1.36
49,155
0
0
0
0
0
0
49,155
49,155
19
8:15
1.38
50,366
2,198
16,440
16,440
0
0
0
50,366
33,926
20
8:00
1.36
53,740
2,244
16,787
346
0
0
0
53,740
53,394
21
8:01
1.45
46,715
2,198
16,440
-346
1
627
4,687
51,402
51,748
22
7:45
0.79
8,012
0
0
-16,440
0
0
0
8,012
24,452
23
7:30
0.65
0
1,029
7,697
7,697
0
0
0
0
-7,697
24
8:45
0.65
0
786
5,883
-1,813
0
0
0
0
1,813
25
7:45
0.67
0
786
5,883
0
0
0
0
0
0
26
8:45
0.62
0
820
6,134
251
0
0
0
0
-251
27
8:01
0.57
0
737
5,512
-622
0
0
0
0
622
28
8:01
0.62
10
656
4,906
-606
0
0
0
0
606
29
7:01
11.48
151,448
737
5,512
606
0
10
0
51,448
150,842
30
8:16
158,409
2,481
18,560
13,048
0
10
0
58,409
145,361

Table 7: Daily
Test Inflow and Stage Height February 28-March 1, 2019
Stage (feet abv. basin bottom)
Inflow (GPM)
Cumulative Inflow (gallons)
Time
HRI Basin 1
HRI Basin 2
HRI Basin 1
HRI Basin 2
HRI Basin 1
HRI Basin 2
8AM
0.79
0.59
0.9
0
0
0
9AM
0.97
0.5
99.5
0
54
0
LOAM
0.7
2.5
0
495
6,024
29,700
11AM
0.66
3.12
0
495.2
6,024
59,412
12PM
0.52
3.49
0
495.4
6,024
89,136
1PM
0.52
3.85
0
252.5
6,024
104,286
2PM
0.52
3.55
0
438.2
6,024
130,578
3PM
0.55
4.48
0
495.3
6,024
160,296
4PM
0.59
4.08
0
223.4
6,024
173,700
5PM
0.48
4.03
0
248.4
6,024
188,604
6PM
0.68
3.86
0
168.6
6,024
198,720
7PM
0.66
3.82
0
257.2
6,024
214,152
8PM
0.68
3.75
0
255
6,024
229,452
9PM
0.61
3.71
0
166.8
6,024
239,460
IOPM
0.63
3.92
0
260.5
6,024
255,090
11PM
0.63
3.62
0
168.6
6,024
265,206
12AM
0.61
3.9
0
165.7
6,024
275,148
IAM
0.59
3.54
0
166.5
6,024
285,138
2AM
0.59
3.26
0
163.1
6,024
294,924
3AM
0.61
3.45
0
169.1
6,024
305,070
4AM
0.59
3.41
0
255.1
6,024
320,376
5AM
0.59
3.39
0
165.5
6,024
330,306
6AM
0.59
3.15
0
167.1
6,024
340,332
7AM
0.55
3.18
0
209.5
6,024
352,902
8AM
0.55
3.37
10
258.8
61024
368,430
9AM
0.52
3.43
10
247.3
6,024
383,268
LOAM
0.88
3.03
147.1
0
6,024
383,268

Table 8: Daily
Test Inflow and Stage Height March 7-8, 2019
Stage (feet abv. basin bottom)
Inflow (GPD)
Cumulative Inflow (Gallons)
Time
HRI Basin I
HRI Basin 2
HRI Basin 1
HRI Basin 2
HRI Basin 1
HRI Basin 2
6AM
0.12
1.24
0
0
0
0
7AM
0.1
1.11
0
0
0
0
8AM
1.81
0.96
467
0
28,020
0
9AM
2.52
1.05
494
0
56,040
0
LOAM
2.9
0.61
494.8
0
85,680
0
11AM
3.08
1.05
495.2
0
115,368
0
12PM
3.01
1
474.5
0
145,080
0
IPM
3.09
0.96
494.8
0
173,550
0
2PM
3.05
1.22
422.9
0
203,238
0
3PM
3.09
1.13
495.8
0
228,612
0
4PM
2.97
1.42
304.1
0
258,360
0
5PM
2.67
1.4
204.1
0
276,606
0
6PM
2.53
1.4
223.5
0
288,852
0
7PM
2.41
0.87
208.4
0
302,262
0
8PM
2.37
1.33
319.7
0
314,766
0
913M
2.93
1.07
309.1
0
333,948
0
IOPM
2.27
0.94
301.6
0
352,494
0
IIPM
2.23
1.24
208.7
0
370,590
0
12AM
2.21
1.27
301.9
0
383,112
0
IAM
2.15
1.22
208.5
0
401,226
0
2AM
2.11
1.2
213.5
0
413,736
0
3AM
2.09
1.16
301.4
0
426,546
0
4AM
2.11
1.22
223.6
0
444,630
0
5AM
2.09
1.16
207.8
0
458,046
0
6AM
2.05
1.35
206.2
0
470,514
0
7AM
2.05
1.07
293.5
0
482,886
0
8AM
1.66
1.13
0
0
500,496
0

Table 9: Daily
Test Inflow and Stage Height March 13-14, 2019
Stage (feet abv. basin bottom)
Inflow (GPM)
Cumulative Inflow (Gallons)
Time
HRI Basin 1
HRI Basin 2
HRI Basin 1
HRI Basin 2
HRI Basin 1
HRI Basin 2
7AM
0.49
0.56
0
0
0
0
8AM
0.64
0.69
0
0
0
0
9AM
1.66
2.06
466.6
391.2
27,996
23,472
LOAM
2.49
3.95
333.2
291.1
55,992
46,944
IIAM
2.51
3.48
303.5
283.6
75,984
64,410
12PM
3.09
3.64
259.4
234
94,194
81,426
1PM
2.51
3.72
295.6
262
109,758
95,466
2PM
2.55
3.74
307.5
284.5
127,494
111,186
3PM
2.55
3.78
329.8
266.2
145,944
128,256
4PM
2.57
3.8
325.2
260
165,732
144,228
5PM
2.59
3.84
280.7
218.2
185,244
159,828
6PM
2.53
3.72
282
221.1
202,086
172,920
7PM
2.55
3.74
328.5
265.7
219,006
186,186
8PM
2.55
3.8
285.4
22.6
238,716
202,128
9PM
2.55
3.8
282.4
221.4
255,840
203,484
IOPM
2.53
3.8
335
267.6
272,784
216,768
11PM
2.51
3.78
287
222.5
292,884
232,824
12AM
2.49
3.76
284.4
221.3
310,104
246,174
IAM
2.47
3.76
281
220.4
327,168
259,452
2AM
2.47
3.72
280.4
220.9
344,028
272,676
3AM
2.45
3.62
282.3
221
360,852
285,930
4AM
2.45
3.68
280.4
220.6
377,790
299,190
5AM
2.43
3.68
278.6
220.4
394,614
312,426
6AM
2.45
3.52
279.7
1221.5
1411,330
1325,650
7AM
12.45
3.7
281.4
1221.4
1428,112
1338,940
8AM
11.99
3.36
52.3
126.6
1444,996
1352,224

Table 1: Comparison of Measured Precipitation at Pluris Hampstead WWTP and Average
Precipitation at Jacksonville, NC
Month/Year
Jacksonville, NC Average
Precipitation (inches)
Pluris Hempstead Actual
Precipitation (inches)
November 2018
3.21
7.1
December 2018
4.21
6.9
January 2019
3.90
3.4
February 2019
3.27
1.9
March 2019
4.09
4.4
April 2019
3.15
4.7
Total
21.83
21.95

Table 11: Calculated HRI Basin Stage/Infiltration Results - November 2018 to April
2019 Cumulative Data
November 2018 - April 2019
November 2018 - April 2019
HRI Basin #1
HRI Basin #2
Stage Height
(ft above basin
bottom)
Calculated
Infiltration (GPD)
Stage Height
(ft above basin)
Calculated
Infiltration (GPD)
0
-35,467
0
-72,250
0.25
6,200
0.25
-47,250
0.5
47,867
0.5
-22,250
0.75
89,533
0.75
2,750
1
131,200
1
27,750
1.25
172,867
1.25
52,750
1.5
214,533
1.5
77,750
1.75
256,200
1.75
102,750
2
297,867
2
127,750
2.25
339,533
2.25
152,750
2.5
381,200
2.5
177,750
2.75
422,867
2.75
202,750
3
464,533
3
227,750
3.25
506,200
3.25
252,750
3.5
547,867
3.5
277,750
3.75
589,533
3.75
302,750
4
631,200
4
327,750
4.25
672,867
4.25
352,750
4.5
714,533
4.5
377,750
4.75
756,200
4.75
402,750
5
797,867
15
1427,750

Table 12: Calculated HRI Basin Infiltration at Maximum Stage - November 2018 to
April 2019 Monthly Data
HRI Basin #1
HRI Basin #2
Month
Max Infiltration*
Month
Max Infiltration*
Nov-18
1,589,800
Nov-18
421,410
Dec-18
683,671
Dec-18
528,300
Jan-19
485,990
Jan-19
431,030
Feb-19
493,130
Feb-19
426,430
Mar-19
953,180
Mar-19
lApr-19
434,270
Apr-19
540,644
428,540
Average
791,069
444,997
*Max infiltration calculated at a maximum stage height of 5 feet above basin bottom

FIGURES

November 2018 - April 2019
400000
350000
300000
0 250000
a
(D
3 200000
0
c 150000
100000
50000
0
-i W-i W-i W-i W-i W-i W-i W-i W-i W1-1 W ti W ti W ti Wr-i Wr-i W ti W ti W ti
c1 c1 N N M M V V Ln Ln W W n n W W M M O O -1 N N M MItT ItT V1 V1 W W 1, n W
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci
Date
Inflow from WWTP (GPD) — Precipitation (inches)
November 2018 - April 2019
400000
350000
300000
250000
a
3 200000
0
c 150000
100000
50000
0
c-I lD r1 lD c1 lD r1 lD r1 lD r1 lD r1 lD r1 lD r1 lD r1 lD c-I lD ci lD c4 lD c4 lD c4 lD ci lD ci lD ci lD ci
ci ci N N M M V V M M to lD 1- n W W M M O O 1-1 1-1 N N M M�* M In lD ID n n W
ci ci c-1 c-1 c-1 c-1 c-1 c-1 c-1 c-I c-I c-I c-I c-I ci ci ci
Date
5
_ 4.5
E
0 4
0
c
3.5
f6 3
2.5
t
2
iv 1.5
N 0.5
0
-50,000
Inflow from WWTP (GPD) Stage (feet abv. basin bottom)
November 2018 - April 2019
•
VAI
2
c
a
0.5
C
5
4.5 E
0
4 0
3.5
3
2.5 m
4V
t
1.5 .�p
iv
1 =
v
on
0.5 ;°
(N
0
y = 6 E-06x + 0.2128
RZ = 0.6184
0 50,000 100,000 150,000 200,000 250,000 300,000 350,000 400,000
Calculated Infiltration (GPD)
Figure 1: Monthly Pilot Test Graphs, November 2018-April 2019, HRI #1

100000
90000
80000
70000
a 60000
C7
3 50000
0
40000
30000
20000
10000
0
100000
90000
80000
70000
a 60000
L7
50000
0
40000
30000
20000
10000
0
5
— 4.5
E
0 4 +�
0
3.5
3
2.5
`^ 0.5
0
-20,000
November 2018
2.5
2
a
0.5
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Inflow from WWTP (GPD) Precipitation (inches)
November 2018
;r
4.5 _
E
4 0
0
0
3.5
c
3
2.5
2
t
tin
1.5
v
1
r�
Ln
0.5
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Date
Inflow from WWTP (GPD) Stage (feet abv. basin bottom)
0 20,000
November 2018
y = 3 E-06x + 0.2306
R2 = 0.1792
•
.��.•........• .. �..*. •�� ...............•
•
40,000 60,000 80,000 100,000
Calculated Infiltration (GPD)
Figure 2: Monthly Pilot Test Graphs, November 2018, HRI #1
120,000

80000
70000
60000
p 50000
a
l7
3 40000
0
= 30000
20000
10000
0
80,000
70,000
60,000
L 50,000
a
0
3 40,000
0
30,000
20,000
10,000
0
5
4.5
0
+; 4
0
c 3.5
3
2.5
2
t
•F, 1.5
a) 1
on
0.5
0
-20,000
December 2018
2.5
i6
d
0.5
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Inflow from WWTP (GPD) Precipitation (inches)
December 2018
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
Date
0
Inflow from WWTP (GPD) Stage (feet abv basin bottom)
HRI Basin #1 - December 2018
...0.............•.• .. �... • •
20,000 40,000 60,000 80,000
Calculated Infiltration (GPD)
Figure 3: Monthly Pilot Test Graphs, December 2018, HRI #1
5
4.5 E
0
4
0
3.5
3 m
2.5 0
2 +,
t
1.5 f
1 v
0.5 N
0
y = 7 E-06x + 0.2143
RZ = 0.4226
100,000 120,000

80000
70000
60000
a 50000
C7
3 40000
0
30000
20000
10000
0
80000
70000
60000
CC' 50000
C7
3 40000
0
30000
20000
10000
0
5
4.5
0
+' 4
0
c 3.5
3
2.5
2
t
1.5
a, 1
tin
N 0.5
0
-20,000
January 2019
2.5
a
0.5 a
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Inflow from WWTP (GPD) Precipitation (inches)
January 2019
5
4.5 0
t;
4 0
3.5
3
2.5
c�
0 N
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Inflow from WWTP (GPD) Stage (feet abv basin bottom)
January 2019
0 20,000 40,000 60,000 80,000 100,000 120,000
Calculated Infiltration (GPD)
Figure 4: Monthly Pilot Test Graphs, January 2019, HRI #1

90000
80000
/1111111/,
60000
d
(7 50000
0 40000
c
30000
20000
10000
0
February 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Date
Inflow from WWTP (GPD) Precipitation (inches)
February 2019
0.35
0.3
0.25 v
t
U
C
0.2
c
0
0.15 M
.Q
U
0.1
a
0.05
0
90,000 5
80,000 4.5
0
70,0001 \ -0
4 0
60,000
3.5
0
� 50,000A
/I'*\— 0001%3 -0
0
2.5
40,000
4f
30,000
t
1.5
20,000
=
1
10,000 V
0f°
.5 N
0
0
5
E 4.5
0
0 4
c: 3.5
3
- 2.5
2
s
°A 1.5
= 1
`�+0 0.5
Ln
0
-20,000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Date
Inflow from WWTP (GPD) Stage (feet above basin bottom)
February 2019
y = 1E-05x + 0.0687
R2 = 0.9296
..... 0.00. ti..*... r .. ....ii
0 20,000 40,000 60,000 80,000 100,000 120,000
Calculated Infiltration (GPD)
Figure 5: Monthly Pilot Test Graphs, February 2019, HRI #1

March 2019
400000
350000
300000
a 250000
0
3 200000
0
150000
100000
50000
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Inflow from WWTP (GPD) Precipitation (inches)
March 2019
400,000
350,000
300,000
a 250,000
200,000
0
150,000
100,000
50,000
0 — —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
5
4.5
0 4
0
3.5
3
2.5
+f
2
t
1.5
a) 1
an
N 0.5
0
-50,000
Inflow from WWTP (GPD) Stage (feet abv basin bottom)
March 2019
0 50,000 100,000 150,000 200,000 250,000
Calculated Infiltration (GPD)
1.6
1.4
1.2 v
t
U
1 .'_
c
0.8 0
0.6 a
U
0.4
a
0.2
0
5
4.5 0
4 0
3.5
3
2.5
m
2 $
1.5
1 v
0.5 tx
0 n
y = 5 E-06x + 0.2341
RZ = 0.806
300,000 350,000 400,000
Figure 6: Monthly Pilot Test Graphs, March 2019, HRI #1

70000
60000
0 50000
a
C7 40000
p 30000
20000
10000
0
70,000
60,000
0_. 50,000
CL
40,000
o 30,000
c
20,000
10,000 -
0
April 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Date
Inflow from WWTP (GPD) —Precipitation (inches)
April 2019
1.2
1 7n
v
t
0.8 c
0.6 .2
0.4
U
a)
0.2 a`
0
5
4.5 0
4 }
0
3.5
c
3
2.5 >
2
1.5
1
ao
0.5
0 v
W
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Ln
5
4.5
o
4
0
3.5
c
3
2.5
2
t
on
1.5
a)
°A 1
ns
Ln
0.5
0
-20,000-10,000
Date
—Inflow from WWTP (GPD) Stage (feet abv basin bottom)
April 2019
y = 9E-06x + 0.1342
RZ = 0.8124
0 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000
Calculated Infiltration (GPD)
Figure 7: Monthly Pilot Test Graphs, April 2019, HRI #1

300000
250000
200000
0
a
L7
3 150000
0
c
100000
50000
November 2018 - April 2019
ci lO a1 l0 ci W ri W ci W ci W a4 W ci W ri W ci W ci W ci W ci l0 ci W ci l0 ci W ci W ci W ci
.--I ci N N M M m m w Lo I, n w w m m O O r-I ri " N M M�* zt Ln Ln w w r, n w
c-I ci ci ci ci c-I ci ci ci c-I ci ci c-I ci ci ci ci
Date
Total Inflow (GPD) Precipitation (inches)
November 2018 - April 2019
2.5
K
a
0.5
300,000
5
4.5
250,000
4 0
z
3.5
200,000
c
0
a
3 �
C7
150,000
>
2.5 'M
0
4f
c
2
100,000
°A
1.5 =
a�
1
50,000
N
0.5
0
0
ci lD -4 l0 -4 l0 1-4l0 1-4W 1-4lD ci W ci l0 ci W ci W ci l0 ci l0 ci W ci l0 ci W ci W ci W ci W ci
ci ci N N CO M V V Ln Ln lD lD I, n 00 00 M M O O ci ci N N M M�'zT Ln Ln W W r` r` 00
c-I c-I c-I ci ci a --I a --I ci ci ci ci ci ci ci ci ci ci
Date
Total Inflow (GPD) Stage (feet abv. basin bottom)
November 2018-April 2019
5
4.5 y = 1E-05x + 0.7225
RZ = 0.725
0 4
o •
3.5
m 3
2.5
4✓
1.5 =
Z • • •
•• � ����
m •j
0.5
0
-50,000 0 50,000 100,000 150,000 200,000 250,000 300,000
Calculated Infiltration (GPD)
Figure 8: Monthly Pilot Test Graphs, November 2018-April 2019, HRI #2

100000
90000
80000
70000
a 60000
3 50000
° 40000
c
30000
20000
10000
0
100,000
90,000
80,000
70,000
60,000
3 50,000
° 40,000
30,000
20,000
10,000
0
5
4.5
E
0 4
0
3.5
3
2.5
t
2
v 1.5
ao 1
n3
0.5
0
-20,000
November 2018
W
2 -,;�
v
t
U
C
1.5 _-
c
0
.41
1 M
_a
U
a)
0.5 a
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Date
Total Inflow (GPD) — Precipitation (inches)
November 2018
5
4.5
0
4
0
3.5
c
3
2.5
-0
n3
2
04 1.5
ao
0.5
o°'n
0
N
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Date
Total Inflow (GPD) Stage (feet abv. basin bottom)
November 2018
y = 1E-05x + 0.7859
RZ = 0.4987
• •� ....
................• • • _
0 20,000 40,000 60,000 80,000 100,000
Calculated Infiltration (GPD)
Figure 9: Monthly Pilot Test Graphs, November 2018, HRI #2

100000
90000
80000
70000
a 60000
3 50000
° 40000
c
30000
20000
10000
0
100,000
90,000
80,000
70,000
0
a 60,000
50,000
° 40,000
c
30,000
20,000
10,000
0
5
4.5
0
4
0
3.5
3
- 2.5
w
to
tf
1.5
1
co
v) 0.5
0
-20,000
December 2018
►W
F1
v
Jz-
U
U
1.5
0.5 a
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Total Inflow (GPD) Precipitation (inches)
December 2018
5
4.5 0
z
4 0
3.5
.N
3
2.5
ca
2
1.5
1
0.5 0°0
ns
0 v�
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Total Inflow (GPD) Stage (ft abv basin bottom)
December 2018
y = 8E-06x + 0.7736
RZ = 0.3643
....................... •..............
••
•
0 20,000 40,000 60,000 80,000 100,000
Calculated Infiltration (GPD)
Figure 10: Monthly Pilot Test Graphs, December 2018, HRI #2

90000
80000
70000
0 60000
a
�? 50000
0 40000
30000
20000
10000
0
90000
80000
70000
0 60000
�? 50000
0 40000
30000
20000
10000
0
January 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Total Inflow (GPD) Precipitation (GPD)
January 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Total Inflow (GPD) Stage (feet abv. basin bottom)
January 2019
2.5
0
5 _
4.5 E
0
4
0
3.5
3
2.5
2 -0
1.5
1 }
t
0.5 ao
0 =
5
y = 1E-05x + 0.6897
0 4.5 RZ = 0.8489
0 4
3.5
LA
3
2.5
2 •
• • ••
v 1.5 ....I•• • i•=•.........i..
= 1 • • ..................
0.5 �..+..'�.....
`n 0
-20,000 0 20,000 40,000 60,000 80,000 100,000
Calculated Infiltration (GPD)
Figure 11: Monthly Pilot Test Graphs, January 2019, HRI #2

80000
70000
60000
a 50000
C9
3 40000
0
c
30000
20000
10000
0
80,000
70,000
60,000
a 50,000
3 40,000
30,000
c
20,000
10,000
0
5
E 4.5
0
0 4
3.5
3
2.5
2
t
en 1.5
= 1
a)
an
20 0.5
Ln
0
-50,
February 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Date
Total Inflow (GPD) Precipitation (inches)
February 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Date
Total Inflow (GPD) Stage (feet abv. basin bottom)
February 2019
Figure 12: Monthly Pilot Test Graphs, February 2019, HRI #2
0.35
0.3
LA
v
0.25
c
0.2 _C:
0
0.15 0
a
0.1 u
v
L
0.05 a
0
5 _
4.5 E
0
4 Z
0
3.5
c
3
2.5
2
1.5
1tao
t
0.5 Z
0 v
tin
LO
+O

300000
250000
p 200000
d
3 150000
0
100000
50000
0
300,000
250,000
0 200,000
a
(7
3 150,000
0
c 100,000
50,000
0
4
0 3.5
3
0
2.5
M 2
1.5
0) 1
m 0.5
+-1
V)
0
-50,000
March 2019
1.6
1.4
1.2
U
1 v
C
0.8 g
0.6 }
n
0.4
L
0.2 a
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Total Inflow (GPD) Precipitation (inches)
March 2019
4
3.5 0
z
3 0
2.5 •N
V)
2
1.5
1 +,
0.5 f
0 =
v
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Date
Total Inflow (GPD) Stage (feet abv. basin bottom)
March 2019 y=1E-05x+0.6573
RZ = 0.8043
•
•
•
0 50,000 100,000 150,000 200,000 250,000 300,000
Calculated Infiltration (GPD)
Figure 13: Monthly Pilot Test Graphs, March 2019, HRI #2

80000
70000
60000
CC) 50000
C7
3 40000
0
30000
20000
10000
0
80,000
70,000
60,000
50,000
C7
3 40,000
0
30,000
20,000
10,000
0
5
4.5
0
+� 4
0
c 3.5
.N
3
2.5
2
t
1.5
= 1
0.5
0
-20,000
April 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Date
Total Inflow (GPD) Precipitation (inches)
April 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Date
Total Inflow (GPD) Stage (feet abv. basin bottom)
0 20,000
April 2019
1.2
1
v
t
0.8 c
c
0.6 O
+-.
ra
0.4 •Q
v
a`
0.2
0
1.8
1.6 0
z
1.4 0
1.2 N
1
0.8
0.6
t
0.4 v
0.2 v
tin
0
Ln
y = 1E-05x + 0.7146
R2 = 0.7945
40,000 60,000 80,000 100,000 120,000
Calculated Infiltration (GPD)
Figure 14: Monthly Pilot Test Graphs, April 2019, HRI #2

5
4.5
0
0
4
s
c 3.5
s 3
2.5
w
2
t
1.5
0 L
0
5
a 4.5
y 4
0
3.5
3
> 2.5
2
1.5
won 1
= 0.5
o°Jv 0
HRI Basin #2
100 200 300 400
Inflow (gpm)
HRI Basin #2
500 600
41 41 41P41ee eQ�Q�Q�Q�Q�Q�Q�ee "� P�P�P�P�P�P�P�P�P�P�
do 'ti ti� ti T 3 R '6 A � C, 'y ,'N yL L 3 � h % � yo
Time
Stage Height (ft) i Inflow (GPM)
HRI Basin #2
600
500
400 �
0_
300
0
200 'c:
100
0
5 450,000
E 4.5 400,000 c
4 0
0 350,000 76
c 3.5 300,000 3
�
3 250,000
2 2 > 200,000
1.5 150,000 2:
c�
1 100,000
v 0.5 50,000
=
v 0 0
+ a a a a a a a a a a a a a a a a a a a a a a a a a¢ a
In W M O ci N N M M l0 1, W M O c-1 N ­1 N M 'T Ln lO 1, W M 0
1-1 r_ I ­4 ­1 ci c-I ci
Time
Stage Height (ft) Estimated Cumulative Inflow (gallons)
Figure 15: Daily Test Graphs, February 28-March 1, 2019, HRI#2

s
0 4.5
0 4
3.5
3
2.5
2
t 1.5
tin
1
W 0.5
� 0
Ln
0
5
E 4.5
O
0 4
c 3.5
LA
3
2.5
2
°P 1.5
'v
= 1
v
ao
m 0.5
Ln
0
HRI Basin #1
100 200 300 400 500
Inflow (gpm)
600
600
500
400 -,
E
a
wo
300 3
O
200
100
0
tiQ`S tiQ`S 3Q`S �Q� �Q`S �Q`S�Q`S -6 CQ`S oQ`S 'tiY tiP`StiP`S3P`S oP`ShP`S �oP`S�P`S wP`S
Time
Stage Height (ft) Inflow (GPM)
HRI Basin #1
5 600,000
0 4.5
0 4 500,000 0
3.5 400,000 -29
3 /` 0
> 2.5 300,000
+6 2 v
1.5 200,000
°A 1
= 100,000 0
0.5 — u
0 0
N 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Q Q Q Q Q Q a a a a a a a a d Q Q Q Q Ln Q Q Q
l0 IW Ol O ci N i--I N M �* M In lD I- W M Ol O i--1 N -IN M 't u'f lD r, 00
ci ci ci ci ci ci
Time
Stage Height (ft) Inflow (GPM)
Figure 16: Daily Test Graphs, March 7-8, 2019, HRI #1

5
E 4.5
0
0 4
c 3.5
3
0
5
0 4.5
+� 4
0
3.5
3
> 2.5
co 2
1.5
bD 1
= 0.5
HRI Basin #1
0 50 100 150 200 250 300
Inflow (GPM)
HRI Basin #1
•
350
400
450
500
y�Q41 titie�'ti3� 'P� -Y '�'
Time
Stage Height (ft) Inflow (GPM)
HRI Basin #1
400
350
300
250 a
eq
200 3
0
150
c
100
50
0
5
500,000
0 4.5
450,000
0 4
c
400,000 O
3.5
350,000
m 3
300,000 3
0
> 2.5
250,000
f° 2
200,000 v
>_
+� 1.5
150,000 0
°A 1
100,000 E
0.5
50,000 u
aj
0
0
v, yoPkl\ titiP11�'tiR y'R �Q� �Q� V 'Q �Q� �Q� �Q� C5 'oR 'y'R titiP� �P� �Q�
Time
Stage Height (ft) Estimated Cumulative Inflow (Gallons)
Figure 17: Daily Test Graphs, March 13-14, 2019, HRI #1

5
E 4.5
0
HRI Basin #2
4
3.5 • �• •
3
2.5
2 •
s
°A 1.5
= 1
v
0.5
0
5
0 4.5
+� 4
0
3.5
3
> 2.5
2
1.5
won 1
= 0.5
tw 0
m
Ln
5
0 4.5
0 4
� 3.5
0 50 100 150 200 250 300 350 400
Inflow (GPM)
ROVER M1.1
°Q� yyQ41'�Y
Time
Stage Height (ft) Inflow (gpm)
HRI Basin #2
In
3
v 2.5
-0 2
;° 1.5
+, 1
0.5
= 0
N `'Q�` (6 Q� 4Q� �Q� y°Q� yyQ� ��P� yP� �P� ''P� °P� `'P� �P�` �P� %P�
Time
Stage Height (ft) Estimated Cumulative Inflow (gallons)
Figure 18: Daily Test Graphs, March 13-14, 2019, HRI #2
4JV
350
300
250
E
200 �
150 0
w
c
100
50
0
400,000
350,000 c
0
300,000
250,000 3
0
200,000
150,000 >
100,000
50,000 v
0