Errata for OWP Products

Section 1.2.1, “Overview of O&M Challenges,” paragraph 2, bullet 1, line 1

For: ewers

Read: sewers

Example 1, Residential flow equation (bottom of page)

For: gpd

Read: 85 gpd

Sidebar information note, line 2

Transpose the quotation mark and the period.

Sidebar information note, line 3

Transpose the right quotation mark and the comma.

Figure 5.2 caption, credit line

For: SRECO_FLEXIBLE

Read: SRECO Flexible, Inc

Figure 5.4 caption, credit line

For: SRECO_FLEXIBLE, Inc

Read: SRECO Flexible, Inc

Section 5.2.1.4, “Cleaning Operation,” paragraph 2, line 2

For: pump

Read: cleaning nozzle

Figure 5.11 caption, credit line

For: SRECO_FLEXIBLE, Inc

Read: SRECO Flexible, Inc

Figure 5.11 caption, credit line

For: SRECO_FLEXIBLE, Inc

Read: SRECO Flexible, Inc

Figure 5.14 caption, credit line

For: SRECO_FLEXIBLE, Inc

Read: SRECO Flexible, Inc

Figure 5.15 caption, credit line

For: SRECO_FLEXIBLE, Inc

Read: SRECO Flexible, Inc

Figure 5.16 caption, credit line

For: SRECO_FLEXIBLE, Inc

Read: SRECO Flexible, Inc

Figure 5.17 caption, credit line

For: SRECO_FLEXIBLE, Inc

Read: SRECO Flexible, Inc

Figure 5.18 caption, credit line

For: SRECO_FLEXIBLE, Inc

Read: SRECO Flexible, Inc

Section 6.1.5.1, “Working with AC Pipe,” paragraph 2, line 3

For: sulphates

Read: sulfates

Section 6.5.8, “Bedding, Backfilling, and Compaction,” paragraph 3, line 1

For: scrubs

Read: shrubs

Example 3, last paragraph

For: The test time, 160 seconds, is greater than 61 seconds (the smaller of t_Q and t_q), so this section of pipe passes.

Read: The test time, 160 seconds, is less than 282 seconds (the smaller of t_Q and t_q), so this section of pipe fails.

Paragraph 1 (in the pink box)

For: The test time of 225 is greater than the smaller of t_Q and t_q, therefore, this section of pipe passes.

Read: The test time of 225 is less than the smaller of t_Q and t_q, therefore, this section of pipe fails.

Question 47, responses a through d

For:

a. 300 GPD/in/mi
b. 325 GPD/in/mi
c. 375 GPD/in/mi
d. 400 GPD/in/mi

Read:

a. 350 GPD/in/mi
b. 450 GPD/in/mi
c. 570 GPD/in/mi
d. 380 GPD/in/mi

Key Terms

For: total dynamic head (TDM)

Read: total dynamic head (TDH)

Section A.7.8 title

For: Pump Speed-Performance Relationships

Read: Pump Speed–Performance Relationships

Section A.8.3.1, “Graphs and Charts,” paragraph 2, line 11

For: yaxis

Read: y-axis

First and second items under the first instance of “where,” (near top of page)

For:

P_out = power factor in hp
P_in = power factor in kW

Read:

P_out = power output in hp
P_in = power input in kW

First item under the second instance of “where,” (bottom of page)

For: i_unbalance[%] = current imbalance in percent

Read: i_unbalance[%] = current unbalance in percent

Paragraph 1, line 2

For: Section 1.51

Read: Section 1.5.1

Section 1.7, “Regulatory Requirements,” paragraph 1, line 3

For: statues

Read: statutes

Question 17, response b

For: 23.9 gal/min

Read: 19.4 gal/min

Figure 5.59, top of graphic

For: MACRO RANGE

Read: MICRO RANGE

For: MICRO PARTICLE RANGE

Read: MACRO PARTICLE RANGE

Figure 5.73, bottom-right label

For: memebrane

Read: membrane

“ACTIVATED SLUDGE SYSTEMS” section, paragraph 1, lines 5 and 6

For: Processes

Read: Systems

Line 2

For: Processes

Read: Systems

Section 2.5.8, “Safety Valves,” paragraph 1, lines 4 and 5

For: “Chlorine Container”

Read:  “Chlorine Containers”

Example 7, Unknown column

For: velocity, ft/s

Read: v = velocity, ft/s

Section 3.5.3, “Vortex-Type Grit Chambers,” line 8

For: Figure 1.9

Read: Figure 1.8

Sidebar information note, line 5

For: Processes

Read: Systems

Example 1, Unknown column

For: food to microorganism ratio, lb BOD/lb MLVSS • d

Read: food to microorganism ratio, lb BOD/lb VSS • d

Second sidebar information note, line 4

For: Examinations

Read: Examination

Bullet 3 (under paragraph 5), line 2

For: Separations

Read: Separation

Sidebar information note, line 4

For: Record-keeping

Read: Recordkeeping

Line 4

For: Systems

Read: System

Paragraph 2, line 1

For: Figure 5.67

Read: Figure 5.71

Paragraph 4, line 1

For: Figure 5.67

Section 5.7, “Startup and Shutdown,” paragraph 2, line 5

For: “Process Startup After Initial Construction,”

Read: “Startup After Initial Construction,”

Section 5.7, “Startup and Shutdown,” paragraph 2, lines 9 and 10

For: “Process Long-Term Shutdown and Startup Procedures”

Read: “Long-Term Shutdown and Startup Procedures”

Section 5.7, “Startup and Shutdown,” paragraph 2, lines 10 and 11

For: “Process Short-Term Shutdown and Startup Procedures,”

Read: “Short-Term Shutdown and Startup Procedures,”

Paragraph 3, line 5

For: Figure 5.68

Read: Figure 5.72

Line 3 from the bottom

For: Figure 5.69

Read: Figure 5.72

“SECONDARY CLARIFIERS” section, bullet 1

For: See Section 5.7.4.2, “Flow Control Gates, Valves, and Weirs,” for checking out the water control structures.

Read: See “Flow Control Gates, Valves, and Weirs” in this section.

Paragraph 2, line 1

For: “Equipment Startup and Shutdown,”

Read: “Startup and Shutdown,”

Section 5.7.7.1, “ASP Influent and Effluent Flow Control Equipment,” Paragraph 2, line 1

For: “Equipment Startup and Shutdown,”

Read: “Startup and Shutdown,”

Section 5.7.7.2, “Surface Aerators and Mixers,” Paragraph 1, line 4

For: “Equipment Startup and Shutdown,”

Read: “Startup and Shutdown,”

Sidebar information note, line 4

For: Processes

Read: Systems

Table 6.11 caption

For: FFBR

Read: FBBR

Table 6.11 column heads (2 instances)

For: FFBR

Read: FBBR

Table 6.11, column 2 body (2 instances)

For: FFBR

Read: FBBR

Sidebar information note, line 8

For: Processes

Read: Systems

Line 11 from the bottom

For: Processes

Read: Systems

Line 7

For: Processes

Read: Systems

Lines 1 and 2 from the bottom

For: “Activated Sludge (Secondary Treatment)”

Read: “Activated Sludge Systems (Secondary Treatment)”

Section 6.4.8, “Startup and Shutdown Procedures,” paragraph 2, line 1

For: MRRB

Read: MBBR

Section 7.3.2.1, “Free Chlorine,” pink box, line 1

For: hypochloric acid

Read: hydrochloric acid

Figure 7.29, “Radiation spectrum and UV lamp output”

For: UV-A

Read: UV-C

For: UV-C

Read: UV-A

Section 8.7.13, “Batch and Controlled Discharge Operations,” paragraph 3, line 6

For: ef-fluent

Read: effluent

“Check Your Understanding,” question 4

Delete the second question mark.

Question 22, response b

For: breading

Read: breeding

Equation in pink box

For: 200 mg/L

Read: 220 mg/L

“TYPICAL VALUES” section, right column head

Insert a space between the comma and μS.

Table 9.10, right column

For: Bromcresol

Read: Bromocresol

For: bromcresol

Read: bromocresol

“Rounding” sidebar, paragraph 1, line 14

For: tenths

Line 1

For: gages

Read: gauges

“Check Your Understanding,” question 4

For: phosphorous

Read: phosphorus

Question 16

For: phosphorous

Read: phosphorus

“Learning Objectives,” item 2

For: phosphorous

Read: phosphorus

Paragraph 1, line 1

For: Phosphorous

Read: Phosphorus

Paragraph 4, line 2

For: phosphorous

Read: phosphorus

Example 1, line 3

For: phosphorous

Read: phosphorus

“Check Your Understanding,” question 1

For: phosphorous

Read: phosphorus

Section 2.3, “Phosphorus Removal,” paragraph 1, lines 8 and 9; paragraph 2, lines 1 and 2

For: Phosphorous or phosphorous

Read: Phosphorus or phosphorus

Section 2.3.1, “Biological Phosphorus Removal,” multiple instances

For: phosphorous

Read: phosphorus

Figure 2.28 caption

For: Phosphorous

Read: Phosphorus

“Check Your Understanding,” questions 1, 2 (two instances), 3, and 4

For: phosphorous

Read: phosphorus

“Check Your Understanding,” questions 1, 3, and 4

For: phosphorous

Read: phosphorus

Section 2.3.3, title and line 1

For: Phosphorous

Read: Phosphorus

Lines 2 and 3 from the bottom

For: phosphorous

Read: phosphorus

Multiple instances on the page

For: phosphorous

Read: phosphorus

Section 2.3.3.6, “Reviewing Plans and Specifications,” paragraph 1, line 9

For: phosphorous

Read: phosphorus

“Check Your Understanding,” questions 1, 2, 3, and 4

For: phosphorous

Read: phosphorus

Paragraph 5, line 2

For: phosphorous

Read: phosphorus

“Check Your Understanding,” questions 2 and 4

For: phosphorous

Section 2.4.4, “Optimizing Nitrogen and Phosphorus Removal,” paragraph 2, line 1

For: phosphorous

Read: phosphorus

Paragraph 1, lines 3, 10, and 11

For: phosphorous

Read: phosphorus

“Check Your Understanding,” question 4

For: phosphorous

Question 3, response d

For: phosphorous

Read: phosphorus

Question 19, text and response c

For: Phosphorous or phosphorous

Read: Phosphorus or phosphorus

Question 31

For: phosphorous

Read: phosphorus

Line 18 under “Metal Salts”

For: principle

Read: principal

Paragraph 2, line 3

For: principle

Read: principal

Line 4 under “Liquid Injection Systems”

For: principle

Read: principal

Paragraph 1, line 10

For: principle

Read: principal

Section 3.2.4.2, “Performance Metrics,” line 1

For: principle

Read: principal

Example 7—Metric, number 1 equation

For: 10[ft]

Read: 10[m]

Figure 3.59 caption

For: contaminant

Read: contaminants

Figure 3.59, top of graphic

For: MOLECUAR RANGE

Read: MOLECULAR RANGE

For: MACRO RANGE

Read: MICRO RANGE

For: MICRO PARTICLE RANGE

Read: MACRO PARTICLE RANGE

Paragraph 4, line 7

For: principle

Read: principal

Example 2, Known column

For: BOD_in

Read: C_in

For: BOD_out

Read: C_out

Example 3, Unknown column

For: gal/d

Read: gal

Example 4, Unknown column

For: gal/d

Read: gal

Example 5, end of paragraph 1

Insert: Assume a specific gravity of 1.0 for the sludge.

Example 5, end of Known column

Insert: SG_sl = specific gravity of the sludge = 1.0

Example 5, number 1 equation

For: P_s

Read: P_s1

Example 7, end of paragraph 1

Insert: Assume a specific gravity of 1.0 for the sludge.

Example 7, Known column

For: Q_s1

Read: Q_sl

Example 7, end of Known column

Insert: SG_sl = specific gravity of the sludge = 1.0

Example 7, number 1

For: Calculate the daily volume of the sludge (Q_sl).

Read: Convert the daily volume of the sludge (Q_sl) from gallons per minute to gallons per day.

Example 12, Unknown column

For: Sludge withdrawal rate, lb/min

Read: MR_{s, sl} = sludge withdrawal rate, lb/min

Example 21, number 2 equation

For: Q_influent

Read: HLR

Example 22, number 2 equation

For: Q_influent

Example 23, line 1

For: basket

Read: basket centrifuge

Line 1

For: eficiency

Read: efficiency

Section 4.3.3.6, “Troubleshooting,” line 1

For: Since

Read: Because

“DIGESTION TEMPERATURE” section, paragraph 2, line 7

For: the temperature

Read: the sludge temperature

“DIGESTION TEMPERATURE” section, paragraph 2, lines 8–10

For: Degree-days is the multiplication of temperature 32°F (0°C) of sludge inside the digester and SRT (days).

Read: To determine degree-days, multiply the sludge temperature (°C) and the SRT (days).

Example 45, line 3

For: ton

Read: ton of sludge solids

Example 45, number 2 equation, line 1

For: +

Read: ×

Example 46, end of Known column

Insert: P_w,blend = 50% moisture

Example 46, number 1, line 1

For: dewatered sludge

Read: dewatered sludge (P_w,sludge)

Example 47, end of Known column

Insert: P_w,blend = 50% moisture

Example 47, number 1, line 1

For: dewatered sludge

Read: dewatered sludge (P_w,sludge)

Section 5.1.4.5, “Disinfection Systems,” paragraph 3, line 1

For: principle

Read: principal

Section 5.3, “Motors,” paragraph 4, line 1

For: principle

Read: principal

For: Chemical phosphorous removal

Read: Chemical phosphorus removal

Second entry under “Phosphorus removal”

For: phosphorous

Read: phosphorus

Figure 4.92 caption, credit line

For: Reprinted with permission of YSI, a Xylem brand

Read: Left: Reprinted with permission of Hach Company; right: Reprinted with permission of YSI, a Xylem brand

Paragraph 2, line 7

For: Section 4.8

Read: Section 4.2

Sidebar information note, lines 3 and 4

For: Section A.8, “Analysis and Presentation of Data,”

Read: Section A.9, “Data Analysis and Presentation,”

Second equation under “CONTAINER 1”

For: 6.24

Read: 62.4

Question 19, response c

For: III

Read: B

Example 8—Metric, first equation after “Calculate the flow rate …,” line 2

For: 0.07^1.5

Read: 0.075^1.5

Last item under “where,”

For: t_d = number of days the cooling tower is operation per year

Read: t_d = number of days the cooling tower is in operation per year

Last paragraph, line 2

For: temperature

Read: temperatures

Question 37, response b

For: 23.9 gal/min

Read: 19.4 gal/min

“Check Your Understanding,” question 4

For: operator

Read: inspector

“Check Your Understanding,” question 1

For: operator

Question 38, responses a through d

For:

a. 8,000 gal/d
b. 12,000 gal/d
c. 24,000 gal/d
d. 10,000 gal/d

Read:

a. 423 min
b. 282 min
c. 141 min
d. 338 min

Sidebar definition for “detention time,” equation

For: Time [d]

Read: Time [h]

Table 1.2, “Primary drinking water regulations,” “Inorganic Chemicals”

For: Arsenic 0.05 mg/L

Read: Arsenic 0.01 mg/L

Method 2, number 1 equation, line 1

For: 0.875

Read: 0.785

Section 2.12, “Math Assignment,” bullet 3

For:

• A.3, “Volume” (A.5.3.1 through A.5.3.6)

Read:

• A.5.3, “Volume” (A.5.3.1 through A.5.3.6)

Figure 3.7 caption, credit line

For: Muerer

Read: Meurer

Question 8, responses a through d

For:

a. 0.26 MGD
b. 0.28 MGD
c. 0.30 MGD
d. 0.32 MGD

Read:

a. 26 lb/d
b. 28 lb/d
c. 30 lb/d
d. 32 lb/d

“WHAT IS TESTED” section, table column head

For: Common Range, NTU

Read: Common Range, pH

Figure 6.30, bottom of figure, items to the right of “where”

For: xs

Read: x_s

For: nj

Read: n_j

For: zj

Read: z_j

For: zs

Read: z_s

Last paragraph, line 3

For: you can you can

Read: you can

Last paragraph, lines 5 through 7.

For:

For instance, if you dilute the sample in Example 4 above by 100 before running the three-dilution test, you can expect results like 4-3-3 or 4-4-2 or 5-1-1, all of which can be read directly from Table 6.4.

Read:

For instance, if you dilute the sample in Example 22 by 100 before running the three-dilution test, you would expect to get a 5-1-1 result, which can be read directly from Table 6.4.

Section 6.6, “Math Assignment,” bullets 2 and 3

For:

• A.6.10, “Laboratory Procedures” (English system)
• A.10.10, “Laboratory Procedures” (Metric system)

Read:

• A.9.6, “Laboratory Procedures” (English system)
• A.10.6, “Laboratory Procedures” (Metric system)

Section 7.2.1.2, “System Growth Rate,” line 5

For: forecast

Read: forecasted

Section A.5.7, “Velocity and Flow Rate,” equation in pink box after first paragraph

For: V

Read: v

Example 30 equation

For: V

Read: v

Example 31 equation

For: V

Read: v

Equations under the graphic

For: p0

Read: p₀

For: p1

Read: p₁

For: p2

Read: p₂

For: p3

Read: p₃

For: p4

Read: p₄

Example 38, equation below paragraph 3

For: P_avg

Read: p_avg

“Writing Numbers in the SI System” sidebar, paragraph 1, line 2

For: based on SI system

Read: based on the SI system

Section A.7.6, “Pump Characteristics,” paragraph 2, lines 5 and 6

For: If plotted on a graph, the curve appears as follows:

Read: If plotted on a graph, the curve appears as indicated in the Head/Capacity graph.

Section A.7.8 title

For: Pump Speed-Performance Relationships

Section A.8.3.1, “Graphs and Charts,” paragraph 2, line 11

For: yaxis

Paragraph above the second graph, lines 5 and 6

For: the dark line in the following figure

Read: the red line in the following graph

Paragraph above the second graph, line 7

For: gray line

Read: blue line

Graph 2

The vertical axis (y-axis) should be labeled “Mean Daily Flow (MGD)” and the horizontal axis (x-axis) should be labeled “Year.”

First pink box, number 7 equation

For: 100 mI

Read: 100mL

Example 11, number 2 equation

For: 300 gpm

Read: 3,000 gpm

Answer Key (corrected version), Chapter 4, “Disinfection”

1. a
2. f
3. g
4. i
5. c
6. d
7. e
8. h
9. j
10. b
11. disinfection, sterilization
12. disinfectants, compounds
13. a
14. b
15. carcinogenic compounds, ammonia, sulfide compounds, phenolic tastes and odors
16. d
17. weaken it, start leaking
18. d
19. c
20. dry, hydrochloric acid
21. a
22. 100°, 38°
23. ventilated air, chlorine
24. continuous, water consumers
25. a

Answer Key (corrected version), Chapter 4, “Disinfection” (continued)

26. c
27. technological difficulties, high energy costs
28. safety aspects, health effects
29. a
30. checking UV monitors, cleaning the UV lamps
31. d
32. b
33. b
34. a
35. d

Answer Key, Chapter 5, “Safety,” answer 10

For: c

Read: b

Answer Key, Chapter 7, “Introduction to Small System Management,” answer 22

For: d

Read: multiply, divide

Answer Key, Chapter 7, “Introduction to Small System Management,” answer 29

For: 398.00

Read: $398.00/mo

“OSH Act of 1970 (Occupational Safety and Health Act of 1970),” page listing

For: 500

Read: 439, 500

Figure 2.1, “Treatment of segregated metal finishing wastestreams”

For: From metal plating plating facility

Read: From metal plating facility

For: pH adjust tank

Read: pH adjustment tank

Table 2.3, “Conventional chemical treatment methods,” missing table note

^aAdapted from Metal Finishing Plating Buyers Guide, TMSI Contractors

Line 8 (under the first pink box)

For: water solution

Read: water solutions

Example 13, line 1

For: 4 percent or 1 normal sodium hydroxide solution

Read: 4 percent (1 N) sodium hydroxide solution

Example 13, sentence before the equation

For: Convert 4 percent to milligrams per liter.

Read: Convert the 4 percent sodium hydroxide solution to milligrams per liter.

Example 21, line 1

For: 1.0

Read: 1

Example 1, paragraph 1, line 4

For: 2 N

Read: 2 N

Example 1, number 1

For: Determine normality

Read: Determine the normality

Example 3, number 1

For: Determine normality

Read: Determine the normality

Example 6, line 3

For: 1 N

Read: 1 N

Example 22, number 2 equation, line 3

For: 3.15

Read: 31.5

Equation in first pink box

For: 8.34 gal

Read: 8.34 lb

Equation in second pink box

For: V_Sludge (2 instances)

Read: V_sludge

For: S_Sludge (2 instances)

Read: S_sludge

Example 2, number 2 equation

For: OE[$]

Read: TOE[$]

Table 1.2, “Primary drinking water regulations,” “Inorganic Chemicals”

For: Arsenic 0.05 mg/L

Read: Arsenic 0.01 mg/L

Section 5.3.3.2, “Reactions with Water,” first pink box, line 1

For: Hypochloric Acid

Read: Hydrochloric Acid

Number 3 (toward the bottom of the page), line 2

For: Table 6.8

Read: Table 6.7

Section 7.10.3.2 title

For: Cryptosporidium in water systems

Read: Cryptosporidium in Water Systems

“Appendix Outline,” A.9 and A.10

For:

A.9 Typical Water Treatment Plant Problems (English System) 672
A.10 Typical Water Treatment Plant Problems (Metric System) 686

Read:

A.9 Typical Water Distribution System Problems (English System) 672
A.10 Typical Water Distribution System Problems (Metric System) 686

“Rounding” sidebar (top right), paragraph 1, line 14

For: tenths

Read: tens

Section A.8.3.1, “Graphs and Charts,” paragraph 2, line 11

For: yaxis

Read: y-axis

Table 1.2, “Primary drinking water regulations,” “Inorganic Chemicals”

For: Arsenic 0.05 mg/L

Sidebar definition for “detention time,” equation

For: Detention Time [d]

Read: Detention Time [h]

Equation at bottom of page

For: Volume[g]

Read: Volume[gal]

Sidebar definition for “detention time,” equation

For: Detention Time [d]

Figure 3.12, “Plot of settled water turbidity vs. cationic polymer dosage”

The vertical axis (y-axis) should be labeled “Settled Water Turbidity, TU” and the horizontal axis (x-axis) should be labeled “Cationic Polymer Dosage, mg/L.”

Last paragraph, line 3

For: la-boratory-grade

Read: laboratory-grade

Example 18, Known column

For: Volumes of Setled Microsand

Read: Volumes of Settled Microsand

Example 18, number 2 equation, middle portion

For: 1,7000 [gal/L]

Read: 1,700 [g/L]

Example 18, number 2 equation, answer

For: 2.6 gal/L

Read: 2.6 g/L

Question 23, responses 1 through 4

For:

1. 1.9 gal/L
2. 2.3 gal/L
3. 2.8 gal/L
4. 3.8 gal/L

Read:

1. 1.9 g/L
2. 2.3 g/L
3. 2.8 g/L
4. 3.8 g/L

Chapter Outline

For: Chaper Review 256

Read: Chapter Review 256

Section 4.1, “Presedimentation,” paragraph 4, line 6

For: there servoir

Read: the reservoir

Section 4.3.1.3, “Circular and Square Basins,” line 6

For: problem

Read: problems

Figure 4.21, “Flow-through times for various types of sedimentation basins”

The vertical axis (y-axis) should be labeled “Actual Dye Concentration/Concentration If All Dye Mixed in Entire Basin” and the horizontal axis (x-axis) should be labeled “Actual Time/Calculated Detention Time.”

Number 3 equation, line 1

For: Alum Needing Alkalinity = [mg/L] Total Alum [mg/L]

Read: Alum Needing Alkalinity [mg/L] = Total Alum [mg/L]

Question 10, line 3

For: 2.0 GPM

Read: 2.0 MGD

Figure 5.12 note, line 1

For: headloss

Read: head loss

Figure 5.13, “Typical filter effluent turbidity data”

The horizontal axis (x-axis) should be labeled “Filtration Time (hours).”

Figure 5.19, “Illustration of cumulative particle counts and differential particle counts”

For: 2 - 5 (2 instances)

Read: 2–5

For: 5 - 20 (2 instances)

Read: 5–20

For: Cummulative

Read: Cumulative

Line between the first and second pink boxes

For: where

Read: or

Example 3, number 4

For: gallons (g)

Read: gallons (gal)

Section 6.7.2, “Operation,” line 1

For: chloride dioxide generator

Read: chlorine dioxide generator

Figure 6.29, top of graphic

For: Mixed Oxidant Solution

Read: Mixed-Oxidant Solution

For: Elecrtrolytic Cell

Read: Electrolytic Cell

Example 7, number 2, last line of note

For: one in Example 7

Read: one

Example 8, Known column, line 1

For: F = Chlorinator Setting = 7.2 lb/d

Read: Cl_feed = Chlorinator Setting = 7.2 lb/d

Example 8, end of Known column

Insert: t = Time = 100 h

Example 8, number 1 equation, line 1

For: T

Read: t

Example 12, number 2

For: chlorine required (Clrequired)

Read: chlorine required (Cl_required)

Question 35, responses 1 through 4

For:

1. 11.5 lb/d
2. 13.6 lb/d
3. 15.8 lb/d
4. 17.3 lb/d

Read:

1. 1.6 %
2. 1.3 %
3. 1.5 %
4. 1.4 %

Section 7.8, “Math Assignment”

Delete bullet 2: A.7, “Pumps”

Figure 9.1 note

For: poper

Read: proper

Example 9

Insert sentence at the end of paragraph 1:

Because you get 1 Na⁺ for every NaCl, 0.025 mol/L of Na⁺ requires 0.025 mol/L of NaCl.

Example 9

Delete the last paragraph.

Section 9.2.3.3, “Normality,” items under “Where,”

For:

M = Molar Concentration (Molarity)
z = Number of H⁺ or OH⁻ Reaction Sites per Molecule

Read:

N = Normality
M = Molar Concentration (Molarity)
z = Number of H⁺ or OH⁻ (or Other H⁺) Reaction Sites per Molecule

Sidebar definition for “N (normal)” (corrected version)

A normal solution contains 1 gram equivalent weight of reactant (compound) per liter of solution. The equivalent weight of an acid is that weight that contains 1 gram atomic weight of ionizable hydrogen or its chemical equivalent. For example, the equivalent weight of sulfuric acid (H₂SO₄) is 49 (98 divided by 2 because there are 2 replaceable hydrogen ions). A 1.0 N solution of sulfuric acid would consist of 49 grams of H₂SO₄ dissolved in enough water to make 1 liter of solution.

“Corrosive Materials” section, “Miscellaneous Corrosive Chemicals” subsection, line 1

Insert a right parenthesis between “ferric chloride” and the comma that follows.

“WHAT IS TESTED” section, table column head

For: Common Range, NTU

Read: Common Range, pH

Section A.7.8 title

For: Pump Speed-Performance Relationships

Figure 5.1, top of graphic

For: MOLECUAR RANGE

Read: MOLECULAR RANGE

For: MACRO RANGE

Read: MICRO RANGE

For: MICRO PARTICLE RANGE

Read: MACRO PARTICLE RANGE