# Lombardo Associates, Inc.



# Representative Nitrogen Removal Project Descriptions

 Clus ter Nitrex TM 

# Systems

 Test Centers & Independent Evaluations

 Groundwater & Stormwater Treatment

 Single Family Nitrex TM 

# Systems

 Multi Family & Institutional Nitrex TM 

# SystemsFrom To

1 2950 Beacon Court, Lusby, MD 60.00 Est. 1.97 quarterly 96.7% Sep-09 present Daniel J. Brumsted

danb@etlannapolis.com

2 6500 Long Beach Drive, St. Leonard, MD SFR 60.00 Est. 2.80 quarterly 95.3% Sep-09 present 410

- 224

- 4304

3 6586 Long Beach Drive, St. Leonard, MD SFR 60.00 Est. 2.95 quarterly 95.1% Sep-09 present

4 18040 Barnesville Road, Barnesville, MD SFR 60.00 Est. 7.77 quarterly 87.1% Mar-10 present Fredericktown Lab Wendy Hagan

301-293-3340 ext.22 w.hagan@fredericktownelabs.com

5 1933 Clifton Road, Virginia Beach, VA SFR 60.00 Est. 3.29 annually 94.5% Aug-09 present Universal Lab

Dan Thornton <d.thornton@universallaboratories.net>

6 Mashpee, MA Main St Villages 30 unit subdivision 55.98 3.85 93.1% May-06 present ClearWater Industries Clearwaterin@aol.com

Mark Cottrel (978) 356-0779

7 Eastham, MA Bracket Landing 40 unit subdivision 45.14 3.11 93.1% Oct-07 present Rosano Davis Donna Muzzi 781-383-8888

donnamuzzi@hotmail.com

8 Bogue Sound Elementary & Croatan High School 106.1 3.11 97.1% Jan-10 present Carteret County Board of Education

Newport, NC Kenny Pedersen (kenny.pedersen@carteretk12.org)

252-241-9681

9 Malibu Village Plaza 53.1 3.04 weekly 94.3% Jul-07 present BioSolutions, Inc. Steve Braband

Malibu, CA 818-991-9997 ext 203 sbraband@biosolutions.org

10 Stone Residence SFR 56.5 2.2 96.1% Dec-00 May-03 Barbara Rich, formerly with OR DEQ and Deschutes County, OR

LaPine, OR brbrrich946@gmail.com 541-617-4713

11 Fleming Residence SFR 68 2.65 96.1% Dec-00 Mar-03 Barbara Rich, formerly with OR DEQ and Deschutes County, OR

LaPine, OR brbrrich946@gmail.com 541-617-4713

12 St. Ignatius, MT SFR 46.1 3.4 92.6% Oct-99 Aug-01 Rebecca Dupuis

for MT Dept of Natural Resources Osprey Environmental Consulting

606 4 th Avenue East

Polson, MT 59860

(406) 883-5603

osprey@centurytel.net

13 330 gpd 39.3 4.5 88.5% Oct-01 Oct-05 Mr. George Heufelder, Director

Barnstable County Department of Health

Cape Cod, MA Post Office Box 427

AVERAGE OF ALL 93.8% Barnstable, MA 02630

(508) 375-6616

gheufeld@capecod.net Building Concepts and

Environmental Testing Lab Contact Period of Operation

Total Nitrogen

Percent (%) Removal Data Collected by

System still operational, no additional data collected. Site was part of LaPine

Demo project

daily for 5 days once

per month for 11

months then

monthly for 11

months. 65 sample

events total Shopping Center -

Restaurants &

Retail Nitrex TM Nitrogen Removal Systems - Nitrogen Removal Performance

System still operational, no additional data collected. Site was part of LaPine

Demo project monthly for 1st 18

months then

quarterly

weekly for 1st 8

weeks, then monthly

for next 9 months

then quarterly Site # Application Septic Tank Effluent

Total Nitrogen Quality

(mg/l) Location Nitrex TM Effluent

Total Nitrogen

Quality (mg/l)

Single Family

Residence (SFR)

Massachusetts Alternative Septic System Test

Center Sampling Frequency

Monthly for 30

months then weekly

for 12 months monthly for 21

months monthly for 23

monthsBioFilter

Nitrex TM Filter Drainfield Pump

Station 

# Cluster System Producing Water with Total Nitrogen Average = 3. 5 9 mg/l

Project: Main Street Village

Mashpee, MA

Design Flow: 5,226 gpd

Wastewater Pio Lombardo, P.E. Engineer: Lombardo Associates, Inc.

Boston, MA & Malibu, CA

617

- 964

- 2924
Pio@LombardoAssociates.com

www.LombardoAssociates.com

The Main Street Village, in Mashpee, Cape Cod, MA, which has 24 housing units and small commercial space, was created with a 5,226 gpd design flow, community

- sized wastewa ter treatment system. The wastewater system is located in a defined nitrogen sensitive area, a Zone II of a public water supply well. Zone II areas are contributing to a water supply well.

The development is served with Town water and the entire Waste water System includes a wastewater collection system, septic tank, and Recirculating Media Biofilter followed by a Nitrex TM Filter to reduce effluent total nitrogen prior to discharge to a drainfield. Permit effluent requirements are TN must be < 10 mg/l. The Wastewater System became operational in March 2006.

After the start

- up period, wastewater effluent TN levels have generally been < 3 mg/l. Effluent BOD and TSS are typically < 15 mg/l and < 5 mg/l, respectively.

Operations and Maintenance requirements consist of permit required monthly visits for treatment system performance sampling. Daily electrical consumption is approximate ly 5 KWHr, or $0.75/day with electric costs of $0.15/KWHr. Telephone connection allows remote monitoring of flow and notification of

alarm conditions. No chemicals and no other utilities are required.

Mashpee, MA Wastewater System at Completion

Mashpee, MA Wastewater System at CompletionThe wastewater treatment technology

demonstrates that decentralized distributed wastewater systems can be as effective as centralized facilities in achieving the accepted limit of technology of TN < 3 mg/l, and is another tool for wastewater planners and engineers in nitrogen sensitive areas.

The Mashpee project results are similar to independent testing performed in Oregon,
Montana, and Massachusetts. The Nitrex TM
System is an approved technology in a number of States, with installations in MA, MD, VA, MT, OR, CA and Canada.

## A CHIEVING 

## T OTAL 

## N ITROGEN 

## 3 .30 MG



## / L

Project Bogue Sound Elementary

Location: School & Croatan High School

Newport, N C

Owner: Carteret County Board of Education

Wastewater Lombardo Associates, Inc. Engineer: Boston, MA & Malibu, CA

www.LombardoAssociates.com

Nitrex TM Design Profile :

 Design Wastewater Flow: 12,0 00 gpd

 Nitrex TM Influent Total Nitrogen (TN) : 70 mg/l

 Effluent Requirements:

o TN <10 mg/l

o cBOD 5 <15 mg/l

o TSS <15 mg/l

o Fecal Coliform < 200 MPN/100ML

Wastewater Treatment Process:

Septic Tank  Recirculati ng Sand Filter  Nitrex TM Filter  Recirc

. Sand Filter  UV Disinfection  Drainfield

P roject Description :
Lombardo Associates, Inc. (LAI) was retained by the Carteret County Board of Education (CCBoE) to design

, permit

a nd build a Nitrex TM Nitrogen R emoval wastewater system serving Croatan High School and Bogue Sound Elementary

School. The existing wastewate r system for the School consisted of three recirculating sand filter (RSF) cells with UV disinfection prior to discharge to a drainfield. The LA I design included modifications to the piping of the RSF to optimize

denitrification and construction of a Nitrex TM filter , and using one of the RSFs for polishing

. The Croatan High School and Bogue Sound Elementary School On

- Site Wastewater Treatment Sy stem became operational in December 2009 and wa s immediately performing within permit requirements. P erformance data is:

Average Effluent Quality :

o TN 3.31 mg/l

o BOD 5 < 2 mg/l

o T SS 8.1 mg/l

o Fecal Coliform 8.8 MPN/100ML 

# Bogue Sound Elementary . 

# School & Croatan High School .

Newport, NC

.

## Cape Cod Residential Development Produci ng Water with Total Nitrogen 2 .14 mg/l

Project: Brackett Landing , Eastham, MA

40 unit subdivision

Design Flow: 8, 31 0 gpd

Wastewater Pio Lombardo, P.E. Engineer: Lombardo Associates, Inc.

Boston, MA & Malibu, CA

617

- 964

- 2924 Pio@LombardoAssociates.com

www.LombardoAssociates.com

L ombardo Associates, Inc. (LAI) provided design

- build

- operate

services for the wastewater treatment system for the Brackett Landing development in the Town of Eastham on Cape Cod, MA utilizing the Nitrex TM System to achieve nitrogen reduction.

The wastewater system was designed and constructed in accordance with the Town of Eastham Board of Health regulations and the MADEP Title 5 requirements for Tot al Nitrogen < 10 mg/l. The System has been installed and o perational since September 2007

. The performance to date is summarized in the following table:

Drainfield Septic Tank

Nitrex TM Tank

BioFilter

## Producing Water Meeting CA Title 22 Unrestricted Water Reuse Standards

Achieving Total Nitrogen < 2 mg/l and Turbidity <1 NTU

Project: Malibu Village Plaza

Shopping Plaza

Design Flow: 16,000 gpd High Strength

Equivalent to ~40,000 gpd

Residen tial Strength Wastewater System

– approximately 200

homes

Client: Malibu Creek Preservation Co.

c/o Soboroff Partners

Wastewater Engineer: Lombardo Associates, Inc.

Malibu, CA & Boston, MA

www.LombardoAssociates.com

Project Description.

Th e Malibu Village Plaza is a shopping plaza consisting of both retail and commercial businesses. It is located in an environmentally sensitive area adjacent to the famous Surfrider Beach in Malibu, California. In 1999 the California Regional Water Quality Control Board (CRWQCB) and the City of Malibu conducted groundwater and surface water sampling at Malibu Village Plaza and the nearby area and determined that wastewater discharge from the Plaza and other properties using conventional septic systems were causing groundwater pollution, which adversely impacted Malibu Creek and Malibu Lagoon.

Lombardo Associates, Inc. (LAI) was retained to engineer a compliant wastewater management system to protect Malibu Lagoon and Surfrider Beach. The previous system was a conventional system consisting of grease traps, septic tanks and gravel drainfields, which provided insufficient nitrogen and bacteria removal.

LAI designed a cost

- effective wastewater management system that employs a septic tank effluent pump (S TEP) collection system and treatment system consisting of the Nitrex TM Nitrogen Removal Technology, recirculating media pretreatment of septic tank effluent, and an ozone

– UV disinfection system for bacteria removal. Treated effluent is discharged to new high capacity drainfields. The treatment system was designed to treat 16,000 gpd of the high strength wastewater (equivalent to ~40,000 gpd of residential strength wastewater) as 85% of the flow was from the Plaza’s popular restaurants. Discharge is to a drainfield at 3 gpd/SF.Water Quality Data

– Nitrex TM Wastewater System

– Malibu Village Plaza, Malibu, CA

The Malibu Village Plaza Wastewater Treatment System has been operational as of July 2007. The Plaza’s wastewater treatment effluent quality i s compliant with permit requirements as well as California Title 22 unrestricted water reuse requirements as shown on the following table.

Energy use, 67% of which is for disinfection, of the high strength 16,000 gpd facility (equivalent to 200

- 250 home s) is approximately $7,400 per year (135 kwhr/day @$0.15). Operation & Maintenance
requirements are weekly visits of 2

– 4 hours for maintenance and sample collection

. An additional 125 chemicals are analyzed on a monthly basis. All are within p ermit requirements. All contaminants of concern are below Detection Limits, typically < 5 ppb.Harvard, MA 6 bedroom 660 gpd NitrexTM System

BioFilter Septic

Tank

Nitrex TM Filter Drip Irrigation 

## O N



## - S ITE 

## W ASTEWATER 

## T

REATMENT 

## S YSTEM W ITH 

## A LKALINI T Y 

## C

HALLENGES

Project Application Data:

 Location : Harvard, MA

 Site Application : 6 bedroom residential site

– 2 houses

 Installation Date : Fall 2006

Wastewater Engineer: Lombardo Associates, Inc.

Boston, MA & Malibu, CA

www.LombardoAssociates.com

Design Profile :

 Design Wastewater Flow = 660 gpd

 Wastewater Treatment Process: Septic Tank → BioFilter

→ Nitrex TM → UV Disinfection → Drip Irrigation

Project Description :

Due to shallow depth to groundwater and closeness to environmentally sensitive wetlands, Lombardo Associates, Inc. was retained to engineer an innovative wastewater sy stem for the 2 home site. The final design of Septic Tank

– BioFilter

– Nitrex TM

– UV Disinfection

– Drip Irrigation was approved by the

Conservation Commission and had a construction cost savings

of 40% as compared to the previously bid mound system. Due to the extremely high influent nitrogen levels, nitrog e n removal were
dimi ni shed due to insufficient alkalinity, which LAI solved with an

automatic alkalinity feed system in summer 2011.

Pe rformance Data: 

# Harvard, MA Residential System

D RIP I RRIGATION

## O N



## - S ITE 

## W ASTEWATER 

## T

REATMENT 

## S YSTEM

Project Application Data:

 Location : Scully Estate

– Suffolk C o unty Environmental Center

 Site Application : Islip, NY

 Installation Date : November 2008

Wastewater Lombardo Associates, Inc. Engineer: Boston, MA & Mal ibu, CA

w ww.LombardoAssociates.com

Design Profile :

 Design Wastewater Flow = 1,300 gpd

 Wastewater Treatment Process: Septic Tank → BioFilter → Nitrex TM
→ Drainfield

Project Description :

The Scully Estate is located on South Bay Avenue in Bay Shore, Islip, NY, a pproximately

6

, 500 feet south of Montauk Highway. Daily design flow is 1

, 300 gpd. Because

of the small flow and the d istance and expense involved in connecting to the municipal sewer, an on

site treatment and disposal system was implemented

.

Nitrogen removal was the critical wastewater issue due to the groundwater and ocean water sensitivity.
For this reason, the Nitre x TM system was sole source selected by Suffolk County.

New features were added to the basic wastewater treatment system described above that making it LEED compliant. The basic treatment process is nitrification followed by the Nitrex TM denitrification reactor , then

to the drainfield

.

. 

# Scully Estate

–

Environmental Center Suffolk County

, Islip, NY

## Residential Syste m Producing Total Nitrogen < 3 mg/l

Project: 1933 Clifton Road

Virginia Beach , VA

Design Flow: 33 0 gpd

Wastewater Engineer: Pio Lombardo,P.E.

Lombardo Associates, Inc. Malibu, CA & Boston, MA

617

- 964

- 2924
Pio@LombardoAssociates.com

www.LombardoAssociates.com

Lombardo Associates, Inc. (LAI) designed a residential Nitrex TM wastewater nitrogen removal system to serve a 3 bedroom residence in Virginia Beach. The Nitrex TM system is virtually maintenance free. The process flow diagram is shown below:

The system was installed in 2008, and is currently achieving TN < 3 mg/l. The water quality data is presented

below:

## RESIDENTIAL SYSTEM PRODUCING TOTAL NITROGEN < 3 mg/l

Project: L anding at Water’s Edge

Chincoteague, V A

Design Flow: 3,900 gpd

Wastewater Engineer: Pio Lombardo,P.E.

Lombardo Associates, Inc. Malibu, CA & Boston, MA

617

- 964

- 2924
Pio@LombardoAssociates.com

www.LombardoAssociates.com

LAI designed the Nitrex TM component of the wastewater treatment and disposal system for the seasonally used Landings at Water’s Edge site in Chincoteague, VA to reduce total nitrogen to less than 10 mg/l in the effluent after pretreatment by a recirculating peat filter aerobic tre atment system. The system is designed for sanitary sewage from a residential development with approximately 15 units. The system has been operational since February 2007 and effluent total nitrogen has been <3 mg/l.

The Nitrex TM system is virtually main tenance free. The water quality data is presented below:

## Cost Competitive Nitrex TM 

## Technology Systems on $ / lb Nitrogen Removed

– Residential Systems

TN < 3 mg/l

Project: Calvert County, M D

3 Sites

Design Flow: 450 gpd

Wastewater Engineer: Pio Lombardo, P.E.

Lombard o Associates, Inc. Boston, MA & Malibu, CA

617

- 964

- 2924
Pio@LombardoAssociates.com

www.LombardoAssociates.com

The Board of County Commissioners of Calvert County, MD, awarded Lombardo Associat es, Inc. (LAI) three project sites for the installation of the

Nitrex TM Technology Nitrogen Removal Systems.

The systems were installed in 2008, and are currently achieving TN < 3 mg/l

.


### % Denitrification Rate = 93.3% 

# P R O J E C T D E S C R I P T I O N

– – C a l v e r t C o u n t y

, , M a r y l a n d

Site #1

– Before Construction S ite #1

– During Construction

Site #2

– Before Construction Site #2

– During Construction PreTreatment

Unit

Septic Tank

Nitrex TMSystem Performance : Site #3

– Before Construction Site #3

– After Construction

## Nitrate Nitrogen < 0.1

- 0.6 mg/l

Total Phosphorus < 0.1 mg/l

Total Perchlorate < 0.2 ug/l

Project: Permeable Reactive Barrier (PRB)

Passive Groundwater Treatment Nitrogen Removal

Wastewater Engineer: Pio Lombardo, P.E.

Lombardo Associates, Inc

. Boston, MA & Malibu, CA

617

- 964

- 2924
Pio@LombardoAssociates.com

www.LombardoAssociates.com

Site 1

– Nitrogen Removal

– Cape Cod, M A

As part of a Cooperative Institute for Coastal and

Estu arine Environmental Technology (CICEET) funded demonstrated project, the Woods Hole Marine Biological Lab (MBL) retained Lombardo Associates, Inc. (LAI) for installation of the patented Nitrex TM groundwater nitrogen removal technology at two locations on C ape Cod, MA in the Waquoit Bay watershed. The above photograph

illustrates the d ramatic water quality improvement with

the installation.

Performance

Site Influent

Nitrate

– N (mg/l) Effluent

Nitrate

– N (mg/l)
Waquoit Bay, MA 1.74 0.007

Chi lds River, MA 7.19 0.568



# Passive Groundwater Treatment

for 

# Nitrogen, Phosphorus & Perchlorate Removal

Installation of PRBCross Section. Nitrex TM PRB

Site 2

– Nitrogen Removal

– Southern New England

Two Nitrex TM PRBs were installed in a Rhode Island coastal watershed. Upstream and downstream concentrations of nitrate, ammonia, and dissolved organic nitrogen in the groundwater were monitored over two annual cycles. The dissolved inorganic nitrogen (DIN) levels are presented below.

Site 3

– Perchlorate and Nitrogen Removal

– Ontario, Canada

Site 4

– Phosphorus Removal

– Massachusetts Site Site

# Treating Groundwater to Produce Nitrate – N Levels < 0.1 mg/l

Project: Waquoit Bay, MA Permeable Reactive Barrier (PRB)

Passive Groundwater Treatment Nitrogen Removal

Wastewater Engineer: Pio Lombardo, P.E.
Lombardo Associates, Inc. Malibu, CA & Boston, MA

617-964-2924
Pio@LombardoAssociates.com

www.LombardoAssociates.com

Waquoit Bay is located in the towns of Falmouth and Mashpee on the south side of Cape Cod. It is part of the Waquoit Bay National Estuarine Research Reserve (WBNERR), which has about 3,000 acres of bays, ponds and uplands. As part of a Cooperative Institute for Coastal and Estuarine Environmental Technology (CICEET) funded demonstrated project, the Woods Hole Marine Biological Lab (MBL) retained Lombardo Associates, Inc. (LAI) for installation of the patented

Nitrex TM groundwater nitrogen removal technology at two locations in the Waquoit Bay watershed.

The two installations constructed in summer 2005 are:

• Childs River

• Waquoit Bay Reserve Property – 149 Waquoit Highway, East Falmouth, MA

Performance.

Site Influent

Nitrate – N (mg/l) Effluent Nitrate – N (mg/l)

Waquoit Bay 1.74 0.007

Childs River 7.19 0.568 

# PROJECT DESCRIPTION –
Waquoit Bay, Ma –

Passive Groundwater Treatment for



## N itr og e n Rem ov al

Wa uoit Ba y Test Sites

Childs River PRB Nitrex TM PRB

BelowWaquoitBayAlgaeAlgaeNo AlgaeNitrexTMPRB Below Ground(Installed August 2005)Photo Taken July 2009 byChris Weidman (WBNERR)Groundwater FlowNitrexTMPermeable Reactive Barrier (PRB)For Nitrogen RemovalWaquoit Bay National Estuarine ResearchReserve (WBNERR), Falmouth, MAEvaluated by the Woods Hole MarineBiological Laboratory (MBL)66Nitrate at Waquoit Bay – Data Collected by WoodsHole MBLGroundwater FlowNote log scale of Y axisNo BarrierWith BarrierGroundwater Quality at Waquoit Bay -Data Collected by Woods Hole MBL

### 7 May 2007

To W h om it May Concern:

I write in support of Mr. Pio Lom b ardo a nd Lombardo Associates, Inc proposal for design and construction of per m eable reactive ba rrie r s. I first m e t Mr. Lo mbardo when I was serving as the Town of Falm outh, MA planning board representative to the Ashum e t Nitrogen

Plum e Offset Comm ittee. This comm ittee wa s established to propose ways to use $8. 5

m illion pled ged to the T o wn of Falmouth by the Air Force C e nter f o r En vironm ental Excellence (AFCEE) to reduce nitrogen load ing in three East Falm outh coastal ponds
(Bournes, Green and Great Ponds) contam inat ed by a sewage plum e e m a n ating from the

Massachus etts Military R e serva tion. The Town, in conjunctio n with the C o mm ittee, drafted a Request for Proposal (R FP) and Lombardo a nd Associates was selected to prepare

recomm endations for rem e diation of the nitroge n-overloading problem in these ponds. They proposed a novel design for constructed wetla nds that m i nim i zed the land area required by concentrating treatm ent in m odules containing Nitrex TM 

### , their proprietary m e dium fostering

N-rem oval.

I was im pressed with th e origin ality o f their proposal, which also included the option of using of a Nitrex TM 

### perm eable reactive barrier along the coas t to in tercept and rem ove nitrates

from groundwater entering the ponds. Mr. Lom b ar do m a de several excell ent points in their presentation to the Comm ittee inclu d ing: (1 ) tha t such bar r ie rs lef t intac t the existing septic

system infrastructure, w h ich provides effectiv e prim ary and secondary treatm ent; (2) that the barriers operate passively and in cur no annual operating and m a intenance expense and (3) that

the barriers are far m o re cost effective to bui ld ($/lb N rem oved) than centralized sewage

trea tm ent f a cilities cap a b le of ter tia r y trea tm ent. At the tim e (approxim a tely f i ve yea r s ago), this app r oach was so new and innovative that th e comm ittee was unwilling to endors e it.

Sim p ly put, it was untested in coastal environm en ts. As a res e arch sc ientis t working on the response of coastal and estuarine ecosystem s to nitrogen inputs, this piqued m y curiosity.

Subsequently, I approached Mr. Lombardo about developing a research proposal for the Cooperative Institute for Coastal and Estu arine E nvironm ental Technology, a program sponsored by NOAA, in order to construct two sm all test barriers in W a quoit Bay that could

be studied to assess thei r perform a nce and evaluate the viabil ity of this approach. W e were successful in obtaining funding a nd Lom b ardo and Associates wa s responsible for the design and construction of these test system s, wh ich we installed in A ugust of 2004. Lom b ardo fulfilled all the obligatio ns of their contract with us on tim e and under bu dget. W e ha ve a good working relationsh i p with Mr. L o m b ardo a nd his colleag ue and collaborator, Dr. W ill Robertson, at the University of W a terloo in Ontario, Canada, the patent holder for this technology.

### Letter of Reference – Lom b ardo Associates Page 2



### We have been studying these system s now for two years and have obt ained quite a bit of interesting data. I believe th is approach has great prom is e, though in m y vi ew further

research is n eeded in co astal s e ttings subject to tides in order to optim ize the perform a nce of the barriers. In particular, we have observ ed that the barrier can becom e inundated with seawater during storm s and spring tides. Seawater intrusion into the Nitrex TM 

### can affect its perform a nce and results in high ra tes of sulfate reduction that coul d shorten the barrier life. It

is also cr itic a lly im portant the ba rr ie rs be ins t a lle d deep enou gh to interce p t the m a jority of the nitrate plum e in grou ndwater. Despite thes e concerns we believe the barrier approach is worth pursuing, especially in non-tidal or m i cr o-tidal environm ents protected from storm s
where it is u n likely that seawat er will penetrate the barrier m a trix and dis p lace g r oun dwater.

Sincerely,

Kenneth H. Forem a n, Ph.D.Figure A: Process Flow Diagram 

# Integrated Decentralized Wastewater Management System

Project: Mayo Peninsula Wastewater Management System - 900,000 gpd 8,000 people

Client: Anne Arundel County Department of Public Works

2662 Riva Road Annapolis, MD 21401

Wastewater Engineer: Pio Lombardo, P.E.
Lombardo Associates, Inc. Boston, MA & Malibu, CA

617-964-2924 Pio@LombardoAssociates.com

www.LombardoAssociates.com

Lombardo Associates, Inc. (LAI) was the Engineer of Record for the Mayo Peninsula Wastewater Collection System which serves 3,000 connections within a 9 square mile area adjacent to Annapolis, MD, with a population of approximately 8,000, where integration of growth management and use of wetlands for wastewater treatment were key attributes. Construction completion occurred in 1992 for the $60 million project.

LAI designed & implemented an innovative decentralized wastewater management project using:

1. On-site systems 2. Cluster wastewater system 3. Large communal system using:

3⁄4 40 miles of septic tank effluent collection system (50% gravity & 50% pressure)

3⁄4 900,000 gallons per day (gpd) Treatment Process of:

 recirculating sand filters,

 constructed bulrush wetlands for nitrogen removal,

 constructed peat wetland for phosphorus removal

 UV disinfection

3⁄4 Ultimate disposal through an off-shore, submerged aquatic vegetation wetland

` 

# P P R R O O J J E E C C T T D D E E S S C C R R I I P

P T T I I O

O N N

– –

M M A A Y Y O O P P E E N N I I N

N S S U U L L A A

, , M M D DIntegrated Phase Implementation:

The Mayo Peninsula Wastewater Collection System was completed in stages, with the Collection System and 20% of the construction occurring in year 1. Thereafter, an additional 20% of construction occurred each y ear until completion. Modular development allowed gradual investment and improved operational efficiency.

 Table 1 (right) presents the treatment performance.

 Figures 1-5 (below) illustrate the process demonstrated in the process flow diagram of Figure A.

Figure 1B: Typical Small Pump Station

Porous Pavement Figure 1A: Typical House Septic Tank –

Effluent Collection

Septic Tank Cover Table 1: Historical Performance

Septic Treatment Reduction

Tank Plant % of

Influent Effluent Influent

BOD 85. 8 4.4 94.8%

(mg/l)

TSS 55.7 2.1 96.3%

(mg/l)

TN 33. 7 7.4 78.0%

(mg/l) Average Data from 01/93 to 08/05Figure 1C: Typical Large Pump Station

Figure 3: Bulrush Wetland Figure 2: Aerial View of Communal Wastewater Treatment System

Bulrush Wetlands

Recirculating Sand Filter (RSF) Peat WetlandsFigure 4 : Peat Wetland During Operation

Figure 5 : Aerial View of Constructed Offshore

Wetland

submerged aquatic

vegetation wetland sNo

- Discharge Nitrex TM Wastewater Treatment System

– 1 st of its kind in California

– unanimously approved

Project: La Paz Development

Malibu, CA

Code Design Flow: 37,120 gpd

Wastewater Lombardo Associates, Inc. Engineer: Malibu, CA & Boston, MA

www.LombardoAssociates.com

Client Mr. Don Schmitz, AICP

Reference: Schmitz & Associates, Inc.

DonS@schmitzandassociates.net

The La Paz Development, located in an environmentally sensitive area adjacent to the famous Malibu Surfrider Beach, consists of eleven (11) commercial buildings with two 175 sea ts restaurants and a municipal facility

.

The wastewater management plan includes a CA Department of Public Health approved Title 22 Disinfected Tertiary Recycled Water Treatment system that will beneficially reuse all recycled water for in

- building non

- potable water use purposes and landscape irrigation

and will have No Discharge to the ground or

surface waters . An effluent storage tank is provided for seasonal periods when recycled

water generation is greater than reuse requirements.

No Discharge is achieved by:

1. In

- Building Bathroom Non

- Potable Water Reuse Purposes

2. L andscape Irrigation

The integrated wastewater

- recycled water

- irrigation system will achieve a 57% reduction of water use.

The LaPaz Wastewater Management Engineering

Plan was unanimously approved by the Los Angeles Regional Water Quality Control Boa rd (LARWQCB ), which has issued a WRR/WDR permit for the project

- the first such system approved in California. The California Department of Public Health (DPH) has determined that the LaPaz wastewater reuse project

is compliant with CA Title 22 Disinfected Tertiary

Treatment Standards . The City of Malibu has approved the LaPaz Wastewater Management

– Water Reuse System

.