2023 Drinking Water Quality Monitoring Plan.pdf

DRINKING WATER QUALITY MONITORING PLAN

STATE SYSTEM NUMBER: 3610703

PERMIT NUMBER: 05-13-22P-001

TWENTYNINE PALMS, CALIFORNIA

PREPARED BY

MARINE AIR GROUND TASK FORCE TRAINING COMMAND (MAGTFTC)

MARINE CORPS AIR GROUND COMBAT CENTER (MCAGCC)

JULY 2023

ii

Contents Acronyms and Abbreviations ............................................................................................................................... iv

1 Purpose

1.1 Background Information

1.2 Source Treatment

1.2.1 Arsenic

1.2.2 Boron

1.2.3 Hexavalent Chromium / Chromium-6

1.2.4 Iron

1.2.5 Manganese

2 Groundwater Source Monitoring

2.1 General Requirements

2.2 Deadman Well Initial Monitoring

2.3 Bacteriological Monitoring

2.4 General Mineral and Physical Monitoring

2.4.1 Asbestos Monitoring

2.4.2 Langelier Saturation Index Monitoring

2.5 Inorganic Chemical Monitoring

2.6 Radioactivity Monitoring

2.7 Volatile Organic Compound Monitoring

2.8 Synthetic Organic Chemical Monitoring

2.9 Source Monitoring Schedule

2.9.1 2023-2025 Monitoring Period Frequencies

2.9.2 10 Year Overview

2.9.3 Deadman Wells Initial Monitoring

3 Distribution System Monitoring

3.1 Routine Bacteriological Monitoring

3.2 Triggered Source Monitoring and Repeat Bacteriological Monitoring

3.3 Additional Bacteriological Monitoring

3.4 General Physical Monitoring

3.5 Corrosion Parameter Monitoring

3.5.1 Lead and Copper Rule

3.5.2 Additional Corrosion Parameter Monitoring

3.6 Disinfection Byproduct Monitoring

4 Reverse Osmosis Plant Monitoring

4.1 Treatment Plant Monitoring

5 Figures

Tables 1-1 Well Sources 1-2 Storage Reservoirs 1-3 Treatment Facilities

2-1 Source Monitoring Frequencies, 3-Year Period 2-2 Source Monitoring Frequencies, 10-Year Period 2-3 Deadman Wells Initial Monitoring

DRINKING WATER QUALITY MONITORING PLAN, STATE SYSTEM NUMBER: 3610703, PERMIT NUMBER: 05-13-22P-001

TWENTYNINE PALMS, CALIFORNIA

iii

3-1 Routine Bacteriological Sampling Sites and Monitoring Schedule 3-2 Repeat Monitoring Sampling Sites 3-3 Lead and Copper Monitoring Locations 3-4 Additional Corrosion Parameter Monitoring Locations 3-5 Disinfection Byproduct Monitoring

4-1 Treatment Plant Monitoring

Figures 5-1 Hydraulic Map 5-2 System Schematic iv

Acronyms and Abbreviations 123TCP 1,2,3-trichloropropane μg/L micrograms per liter μmhos/cm micromhos per centimeter

BOQ Bachelor Officers’ Quarters

CACO3 dibromochloropropane

CCD closed-circuit desalination

CCR California Code of Regulations

CCRO closed-circuit reverse osmosis

Combat Center Marine Air Ground Task Force Training Command, Marine Corps Air Ground Combat Center

CSWRCB California State Water Control Board

D dichlorophenoxyacetic acid

DNCO Non-commissioned Officer on Duty

DBCP dibromochloropropane

DBP disinfection byproduct monitoring

DCE dichloroethene dinoseb 6-sec-butyl-2,4-dinitrophenol

Division California State Water Resources Control Board, Division of Drinking Water

DWR Department of Water Resources

E.coli Escherichia coli

EDB ethylene dibromide

EQ equalization

ESD Exercise Support Division gal gallon(s) gpm gallon(s) per minute

HAA5 haloacetic acids

HPC heterotrophic plate count

HQ headquarters

HQBN Headquarters Battalion

LSI Langelier Saturation Index

MBAS methylene blue active substance

MCCES Marine Corps Communication-Electronics School

MCL maximum contaminant level

MG million gallon(s)

DRINKING WATER QUALITY MONITORING PLAN, STATE SYSTEM NUMBER: 3610703, PERMIT NUMBER: 05-13-22P-001 v

MPN most probably number

NL notification level

NO3 nitrate

PCA possible contaminating activities

PCB polychlorinated biphenyl

PCE tetrachloroethene

POC point of contact

RL response level

RO reverse osmosis

RV recreational vehicle

SOC synthetic organic chemical

TCA trichloroethane

TCB trichlorobenzene

TCE trichloroethene

TCDD tetrachlorodibenzodioxin

TDS total dissolved solid

TP trichlorophenoxyacetic acid

TTHM trihalomethanes

VC vinyl chloride

VOC volatile organic compound

WQP water quality parameter

1 Purpose The Marine Air Ground Task Force Training Command, Marine Corps Air Ground Combat Center (hereinafter Combat Center) is preparing this Drinking Water Quality Monitoring Plan (hereinafter Plan) in accordance with California Code of Regulations (CCR) Title 22 Section 64416. The purpose of this plan is to identify drinking water monitoring requirements for compliance with CCR Title 22 Chapter 15; including identifying sampling constituents, frequency of sampling, and sampling locations. Although the Combat Center has less than 10,000 service connections, the Combat Center has prepared this plan to be submitted to the California State Water Resources Control Board, Division of Drinking Water (hereinafter Division). An updated plan will be submitted to the Division at least once every 10 years or any time the plan no longer ensures representative monitoring of the system.

1.1 Background Information

The Combat Center’s domestic water supply (System No. 3610703) serves a population of approximately 18,339 through 2,480 service connections. This water supply is classified as a community water system and is regulated under Permit 05-13-22P-001; issued June 17, 2022, by the Division. This permit allows the Combat Center to operate the P-192 Reverse Osmosis (RO) Treatment Plant and the existing water system facilities.

The Combat Center utilizes groundwater which is supplied water from 13 active groundwater wells: 11 vertical wells in the Surprise Spring Subbasin and 2 wells in the Deadman Lake Subbasin of the Deadman Valley Groundwater Basin as delineated by the California Department of Water Resources (DWR). These wells are listed in Table 1-1. The Deadman Valley Groundwater Basin is unadjudicated and managed by the Combat Center (DWR, 2003; 2020). The water system is not under the direct influence of surface water and the Combat Center does not purchase water. Additionally, there are no water system interties. Storage reservoirs are listed in Table 1-2.

Table 1-1. Well Sources

Building No. Source Name PS Code Status Capacity (gpm) Generator

2325 Well 2A CA3610703_001_001 Active 800 No

2327 Well 3B CA3610703_013_013 Active 1000 No

2329 Well 4A CA3610703_003_003 Active 1050 Yes

2331 Well 5A CA3610703_004_004 Active 950 No

2333 Well 6A CA3610703_005_005 Active 950 Yes

2336 Well 7A CA3610703_006_006 Active 950 Yes

2338 Well 8A CA3610703_007_007 Active 990 Yes

2340 Well 9A CA3610703_008_008 Active 950 No

2342 Well 10A CA3610703_009_009 Active 840 No

2344 Well 11A CA3610703_010_010 Active 840 No

2346 Well 12A CA3610703_011_011 Active 880 No

2335 Deadman Well 1 CA3610703_015_015 Active 1200 Yes

2337 Deadman Well 2 CA3610703_016_016 Active 1200 No gpm = gallon(s) per minute

DRINKING WATER QUALITY MONITORING PLAN, STATE SYSTEM NUMBER – 3610703, PERMIT NUMBER: 05-13-22P-001

Table 1-2. Storage Reservoirs Building No. Reservoir ID Type Capacity Description

2334 RO Source Tank Welded Steel 1.1 MG EQ Tank

2338 Well 8A Source Water Tank Welded Steel 0.05 MG EQ Tank

2334 – 1 Equalization Tank No. 1 Welded Steel 0.10 MG EQ Tank

2334 – 2 Equalization Tank No. 2 Welded Steel 0.10 MG EQ Tank

2334 – 3 Equalization Tank No. 3 Welded Steel 0.80 MG EQ Tank

2334 – 4 Equalization Tank No. 4 Welded Steel 2.00 MG EQ Tank

1597 Reservoir No. 1 Welded Steel 1.00 MG Lower Main

1497 Reservoir No. 2 Welded Steel 1.00 MG Lower Main

2122 Reservoir No. 3 Welded Steel 4.50 MG Upper Main

1596 Reservoir No. 5 Welded Steel 4.50 MG Upper Main

5790 Camp Wilson Reservoir Concrete 1.00 MG Camp Wilson

2110 Rifle Range Reservoir Welded Steel 0.02 MG Rifle Range

2551 Range 110 / Artillery # 1 Welded Steel 4,700 gal Middle Artillery

2750 Range 113 / Artillery #2 Welded Steel 3,800 gal Upper Artillery

2551 Range 110 / Artillery # 1 Pressure Hydropneumatic 550 gal Middle Artillery

2750 Range 113 / Artillery #2 Pressure Hydropneumatic 220 gal Upper Artillery

1148 Naval Hospital Reservoir Welded Steel 0.165 MG NAa a Tank supplies the Naval Hospital, is not part of the distribution system.

EQ = equalization gal = gallon(s)

MG = million gallons

The Combat Center has a P-192 RO Treatment Facility consisting of RO filtration with bypass blending. The reject of the primary RO is further treated in a second pass through a closed-circuit reverse osmosis (CCRO) system (also called closed-circuit desalination [CCD]). All Well Sources are approved to use RO, Blending, and CCRO/CCD for treatment of arsenic, boron, hexavalent chromium, iron, fluoride, and manganese. The EQ Tank Chlorination will remain as a backup or boost chlorination for the RO treatment effluent and as primary chlorination when the RO treatment is completely bypassed. No new sources, treatment process, or treatment for a new contaminant can be used without a permit amendment. Table 1-3 lists the treatment facilities.

Table 1-3. Treatment Facilities Building No. Facilities ID Treatment Status Generator

2347 P-192 RO Plant RO/Disinfection Primary Yes

2334 EQ Tanks 1, 2, 3, and 4 Disinfection Secondary Yes

1.2 Source Treatment

The RO treatment facility and blend provides treatment for arsenic, boron, hexavalent chromium, iron, and manganese. The final RO blend is monitored monthly for these contaminants. Methylene blue active substance (MBAS) and vanadium will also be treated by the RO facility.

1.2.1 Arsenic

Arsenic has been detected in all wells currently below or at the 10 micrograms per liter (μg/L) primary maximum contaminant level (MCL). Well 5A arsenic concentration has fluctuated and at times exceeded the arsenic MCL. An arsenic blend plan was permitted for Well 5A in 2007 but this has not been used due to pipe flow restrictions and the well has remained offline since at least May 2013 to present. Arsenic levels at Well 5A are currently below the MCL but this may be due as the well has been offline for an extended period. Deadman Well 1 has arsenic at the 10 μg/L MCL. No possible contaminating activities (PCA) have been associated with the detection of arsenic and is considered naturally occurring.

1.2.2 Boron

Boron, an unregulated contaminant, was found in Deadman Well 2 at 1,000 μg/L and Deadman Well 1 at 1,900 μg/L which is greater than the notification level (NL) of 1,000 μg/L but less than the response level of 10 times the NL. No PCA has been associated with the detection. Boron detections are considered naturally occurring.

1.2.3 Hexavalent Chromium / Chromium-6

Hexavalent chromium was detected in all wells and detected above the former 10 μg/L primary MCL at Wells 3B, 4A, and at the MCL at Well 5A in the last monitoring. No PCA has been associated with chromium and the detection is considered naturally occurring.

1.2.4 Iron

Iron was detected at Wells 2A, 5A, and 11A above the 0.3 mg/L (300 μg/L) secondary MCL. No PCA has been associated with iron and the detection is considered naturally occurring.

1.2.5 Manganese

Manganese was detected at Wells 2A and 5A above the 50 μg/L secondary MCL. No PCA has been associated with manganese and the detection is considered naturally occurring.

2 Groundwater Source Monitoring

2.1 General Requirements

The Surprise Springs wells and Deadman Wells 1 and 2 are not considered immediately vulnerable to contamination by volatile organic compounds (VOCs) as discussed in the Drinking Water Source Assessment and Protection report provided to the Division.

Monitoring frequencies required for non-vulnerable water sources have been determined by the Division for the 9-year compliance cycle ending December 31, 2028, and notice was given in the Division letter dated January 14, 2020. A waiver request for source asbestos, VOC, SOC, and distribution asbestos was submitted April 5, 2022, and was approved in the Division letter dated April 6, 2022. Monitoring frequencies for Deadman Wells 1 and 2 will be determined following initial monitoring and waiver applicability for reduced monitoring.

2.2 Deadman Well Initial Monitoring

By December 31, 2023, the following initial monitoring for Deadman Well 1 and 2 must be completed:

Monitor four consecutive quarters for regulated VOCs to complete the initial monitoring requirements for VOCs.

Monitor four consecutive quarters for regulated SOCs to complete the initial monitoring requirements for SOCs.

Monitor four consecutive quarters for radiological chemicals to determine the monitoring requirements for radiological contaminants. Monitoring for radiological chemicals must include analysis for gross alpha, uranium, radium 226 and radium 228. If initial two quarters are non-detect, the final two quarters may be waived.

Monitor perchlorate twice in 1 year, 5 to 7 months apart. One sample must be collected between May 1 thru September 30.

These requirements are included in the appropriate sections below. The initial monitoring for VOC, SOC, and radiological will be completed. Waivers can be requested once eligible.

2.3 Bacteriological Monitoring

Drinking water supply wells are monitored quarterly for total coliform as indicated in Section 2.9, Source Monitoring Schedule. If the sample is total coliform positive, Escherichia coli (E.coli) must be monitored. The results of the monitoring must be reported to the Division by the 10th day of the following month.

Groundwater sources must be sampled after any positive coliform in the distribution within 24 hours of notification of the total coliform positive sample as described in Section 3.2, Triggered Source Monitoring and Repeat Bacteriological Monitoring.

2.4 General Mineral and Physical Monitoring

All drinking water wells will be monitored for constituents listed in Tables 64449-A and 64449-B of 22 CCR 64449 and for General Mineral and General Physical characteristics once every 3 years as indicated in Section 2.9, Source Monitoring Schedule.

2.4.1 Asbestos Monitoring

For Surprise Springs wells, the Combat Center received reduced monitoring. All Surprise Springs wells will collect an asbestos sample every 9 years.

Deadman Wells 1 and 2 will be monitored for asbestos every 3 years.

2.4.2 Langelier Saturation Index Monitoring

The Combat Center must monitor the Langelier Saturation Index (LSI) at Source Temperature every 3 years at all source wells.

2.5 Inorganic Chemical Monitoring

All drinking water wells will be monitored for Inorganic Chemicals once every 3 years except for Nitrate (NO3), which will be monitored annually as indicated in Section 2.9, Source Monitoring Schedule. In the event of an MCL exceedance, monitoring frequency will be increased to quarterly.

2.6 Radioactivity Monitoring

Deadman Wells 1 and 2 will be monitored for four consecutive quarters for gross alpha, uranium, radium 226, and radium 228. If first two quarters are non-detect, the final two quarters can be waived, and frequency will be determined after this initial sampling.

For Surprise Springs wells, the Combat Center received reduced monitoring. All Surprise Springs wells will collect one gross alpha Particle sample every 9 years. Uranium, Radium-228, and Radium-226 sampling is waived for all Surprise Springs wells.

2.7 Volatile Organic Compound Monitoring

Deadman Wells 1 and 2 will be monitored for VOCs quarterly for 1 year for initial monitoring.

For Surprise Spring Wells, VOCs have been waived and will be monitored every 6 years as indicated in Section 2.9, Source Monitoring Schedule.

2.8 Synthetic Organic Chemical Monitoring

Deadman Wells 1 and 2 will be monitored for SOCs quarterly for 1 year for initial monitoring.

For Surprise Spring Wells, SOCs have been waived and will be monitored every 9 years except for ethylene dibromide (EDB), dibromochloropropane (DBCP), and 1,2,3-trichloropropane (123TCP) which are monitored once every 3 years as indicated in Section 2.9, Source Monitoring Schedule.

2.9 Source Monitoring Schedule

2.9.1 2023-2025 Monitoring Period Frequencies Table 2-1 shows the source monitoring frequencies. Monitoring is reviewed every 3-year period by the Division.

2.9.2 10 Year Overview Table 2-2 provides an overview of the source monitoring schedule. Deadman Well 1 and Deadman Well 2 are in initial monitoring for Radiological constituents, VOCs, and SOCs. Ongoing frequencies will be determined after initial monitoring.

Table 2-1. Source Monitoring Frequencies, 3-Year Period So ur ce

N am e

Ba ct er io lo gi ca l General Mineral/Physical

In or ga ni ca

N itr at e

N itr ite

Ra di ol og ic al

VO

Ca

SOC

As be st os

LS

I

O th er G en er al M in er al

Ph ys ic al

ED

B

DB

CP

3T

CP

O th er

SO

Cs a

Well 2A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 3B Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 4A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 5A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 6A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 7A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 8A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 9A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 10A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 11A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Well 12A Quarterly 9 Yearsb 3 Yearsc 3 Years 3 Years 1 Year 3 Years 9 Yearsb 6 Yearsb 3 Years 3 Years 3 Years 9 Yearsb

Deadman Well 1 Quarterly 3 Years 3 Yearsc 3 Years 3 Years 1 Year 3 Years Quarterlyd Quarterlyd Quarterlyd

Deadman Well 2 Quarterly 3 Years 3 Yearsc 3 Years 3 Years 1 Year 3 Years Quarterlyd Quarterlyd Quarterlyd a Parameter Tables detailed below b Approved Reduced Monitoring c Increased Monitoring from permit conditions or detections d Initial Monitoring

Other General / Physical: Alkalinity, Bicarbonate, Alkalinity, Carbonate, Calcium, Chloride, Color, Conductivity at 25 C micromhos per centimeter (umhos/cm), Copper, Free, Foaming Agents (Surfactants), Hardness, Total (As CACO3), Hydroxide as Calcium Carbonate, Iron, Magnesium, Manganese, Odor, Ph, Silver, Sodium, Sulfate, Total Dissolved Solids (TDS), Turbidity, Zinc

Inorganic: Aluminum, Antimony, Total, Arsenic, Barium, Beryllium, Total, Cadmium, Chromium, Cyanide, Fluoride, Mercury, Nickel, Perchlorate, Selenium, Thallium, Total

VOCs: 1,1,1-trichloroethane (1,1,1-TCA), 1,1,1,2-tetrachloroethane, 1,1,2-TCA, 1,1-dichloroethane (1,1-DCA), 1,1-dichloroethene (1,1-DCE), 1,2,4-trichlorobenzene (1,2,4-TCB), O-dichlorobenzene, 1,2-DCA, 1,2-dichloropropane, 1,3-dichloropropene, P-dichlorobenzene, Benzene, Carbon Tetrachloride, Cis-1,2-DCE, Dichloromethane, Ethylbenzene, Methyl Tert-Butyl Ether, Chlorobenzene, Styrene, Tetrachloroethene (PCE), Toluene, Trans-1,2-DCE, Trichloroethene (TCE), Trichlorofluoromethane, Trichlorotrifluoroethane, Vinyl Chloride (VC), Xylenes, Total

Other SOCs: 2,3,7,8-TCDD, Diquat, 2,4,5-trichlorophenoxyacetic acid (2,4,5-TP), 2,4-dichlorophenoxyacetic acid (2,4-D), Lasso (Alachlor), Atrazine, Bentazon, Benzo(A)Pyrene, Carbofuran, Chlordane, Dalapon, Di(2-Ethylhexyl) Adipate, Di(2-Ethylhexyl) Phthalate, 6-sec-butyl-2,4-dinitrophenol (dinoseb), Endothall, Endrin, Glyphosate, Heptachlor, Heptachlor Epoxide, Hexachlorobenzene, Hexachlorocyclopentadiene, BHC-Gamma, Methoxychlor, Molinate, Oxamyl, Pentachlorophenol, Picloram, Total Polychlorinated Biphenyls (PCBs), Simazine, Thiobencarb (Bolero), Toxaphene

Table 2-2. Source Monitoring Frequencies, 10-Year Period

Ye ar

Ba ct er io lo gi ca l

As be st os

G en er al

M in er al

Ph ys ic al a

In or ga ni ca

N itr at e

N itr ite

Ra di ol og ic al

VOCs SOCs

M

TB

E

O th er V

O Cs a

ED

B

DB

CP

3T

CP

O th er S

O Cs a

2023 All Wells Quarterly

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A, DM1, DM2

DM1, DM2

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A, DM1, DM2

All Wells

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A, DM1, DM2

DM1,

DM2

Quarterly

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A

DM1,

DM2

Quarterly

DM1, DM2

Quarterly

DM1, DM2

Quarterly

DM1, DM2

Quarterly

DM1, DM2

Quarterly

2024 All Wells Quarterly

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

All Wells

3B, 6A, 10A, 12A

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

2025 All Wells Quarterly 8A All

Wells 8A

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

2026 All Wells Quarterly DM1, DM2 DW1, DW2

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A, DM1, DM2

All Wells

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A, DM1, DM2

All Surprise Spring Wells

2027 All Wells Quarterly

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

All Wells

2A, 4A, 5A, 7A, 8A, 9A, 11A

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

3B,6A, 10A, 12A

2028 All Wells Quarterly 8A All

Wells 8A 8A

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

2029 All Wells Quarterly DM1, DM2 DM1, DM2

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A, DM1, DM2

All Wells

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A, DM1, DM2

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A

Table 2-2. Source Monitoring Frequencies, 10-Year Period

Ye ar

Ba ct er io lo gi ca l

As be st os

G en er al

M in er al

Ph ys ic al a

In or ga ni ca

N itr at e

N itr ite

Ra di ol og ic al

VOCs SOCs

M

TB

E

O th er V

O Cs a

ED

B

DB

CP

3T

CP

O th er S

O Cs a

2030 All Wells Quarterly

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

All Wells

3B, 6A, 10A, 12A

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

2A, 4A, 5A, 7A, 8A, 9A, 11A

2031 All Wells Quarterly 8A All

Wells 8A

2A, 3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A

2032 All Wells Quarterly

2A,3B, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 11A, 12A, DM1, DM2

DM1, DM2

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A, DM1, DM2

All Wells

2A, 3B, 4A, 5A, 6A, 7A, 9A, 10A, 11A, 12A, DM1, DM2

a Parameter Tables detailed below

MTBE = methyl tert-butyl ether

Other General / Physical: LSI, Alkalinity, Bicarbonate; Alkalinity, Carbonate; Calcium; Chloride; Color; Conductivity @ 25 C µmhos/cm; Copper, Free; Foaming Agents (Surfactants); Hardness, Total (As CaCO3); Hydroxide as Calcium Carbonate; Iron; Magnesium; Manganese; Odor; Ph; Silver; Sodium; Sulfate; TDS; Turbidity; Zinc

Inorganic: Aluminum; Antimony, Total; Arsenic; Barium; Beryllium, Total; Cadmium; Chromium; Cyanide; Fluoride; Mercury; Nickel; Perchlorate; Selenium; Thallium, Total

Other VOCs: 1,1,1-TCA; 1,1,2,2-tetrachloroethane; 1,1,2-TCA; 1,1-DCA; 1,1-DCE; 1,2,4-TCB; O-Dichlorobenzene; 1,2-DCA; 1,2-Dichloropropane; 1,3-Dichloropropene; P-Dichlorobenzene;

Benzene; Carbon Tetrachloride; Cis-1,2-DCE; Dichloromethane; Ethylbenzene; Chlorobenzene; Styrene; PCE; Toluene; Trans-1,2-DCE; TCE; Trichlorofluoromethane; Trichlorotrifluoroethane;

VC; Xylenes, Total

Other SOCs: 2,3,7,8-TCDD, Diquat, 2,4,5-trichlorophenoxyacetic acid (2,4,5-TP), 2,4-dichlorophenoxyacetic acid (2,4-D), Lasso (Alachlor), Atrazine, Bentazon, Benzo(A)Pyrene, Carbofuran, Chlordane, Dalapon, Di(2-Ethylhexyl) Adipate, Di(2-Ethylhexyl) Phthalate, 6-sec-butyl-2,4-dinitrophenol (dinoseb), Endothall, Endrin, Glyphosate, Heptachlor, Heptachlor Epoxide, Hexachlorobenzene, Hexachlorocyclopentadiene, BHC-Gamma, Methoxychlor, Molinate, Oxamyl, Pentachlorophenol, Picloram, Total Polychlorinated Biphenyls (PCBs), Simazine, Thiobencarb (Bolero), Toxaphene

2.9.3 Deadman Wells Initial Monitoring

Table 2-3 provides the schedule for the Deadman Wells initial monitoring.

Table 2-3. Deadman Wells Initial Monitoring Year VOCs SOCs RAD Perchlorate

2023 Quarterly Quarterly

Quarterly If the first two quarters are non-detect, the final two quarters can be waived

Twice, 5 to 7 months apart One sample must be collected between May 1 through September 30

2024 Annuallya

2 Quarters every 3 years*

Frequency to be determined after initial sampling

Frequency to be determined after initial sampling2025 Annuallya

2026 Annuallya a Can apply for waiver

3 Distribution System Monitoring

3.1 Routine Bacteriological Monitoring

An approved monitoring plan authorizes that eight samples are collected per week (32 to 40 per month). There are 17 distribution sites that are used in five weekly rotation schedules that cover all pressure zones every week as shown in Table 3-1. The sampling plan should be updated every 10 years or when there are changes. The samples are analyzed for the presence of Total Coliform Bacteria and reported in accordance with CCR, Title 22, Sections 64423 through 64426.1.

Table 3-1. Routine Bacteriological Sampling Sites and Monitoring Schedule

Pressure Zone Site # Site Location Monthly Sample Week

1 2 3 4 5a

Zone 1 EQ Tank Zone

1 Building 5702 (Camp Wilson Expeditionary Airfield) x x x

2 Building 5399 (Camp Wilson) x x x

3 Range #113 (Philips Road) x x

4 Building 2205 (Central Magazine Area/Philips Road) x x

Zone 2 Rifle Range Zone

5 Building 2096 (Rifle Range Road) x x x

6 Building 2143 (Rifle Range Road) x x

Zone 3 Upper Main Camp

7 Ocotillo Ponds (Coyote/West Side) x x

8 Ocotillo Housing (Falcon Street) x x

9 Building 1933 (Outside of Fence) x x x

10 Building 1863 (Griffin Road) x x x

11 Building 1145 (Naval Hospital) x x

Table 3-1. Routine Bacteriological Sampling Sites and Monitoring Schedule

Pressure Zone Site # Site Location Monthly Sample Week

1 2 3 4 5a

Zone 4 Lower Main Camp

12 Smoketree Avenue (left before Joshua Heights) x x

13 Saddle Back Avenue (Housing) x x

14 65410 Oleander (Housing) x x

15 Cottontail and Gatehill Street (Housing) x x

16 Rainbow Canyon Road (Condor Road) x x x

17 Sunshine Peak RV Park Playground) x x a If applicable

RV = Recreational Vehicle

3.2 Triggered Source Monitoring and Repeat Bacteriological

Monitoring

In accordance with the Groundwater Rule (CCR, Title 22, Section 64430) the Combat Center will conduct triggered source monitoring and will sample all active groundwater sources for fecal indicator in the event of a positive total coliform distribution sample. Within 24 hours of notification of the distribution total coliform-positive sample, at least one sample from each ground water source in use at the time the distribution total coliform-positive sample was collected must be tested. If a routine distribution sample is total coliform-positive, a public water system shall collect a repeat sample in accordance with CCR, Title 22, Section 64424. Repeat Monitoring Sampling Sites are listed in Table 3-2.

Table 3-2. Repeat Monitoring Sampling Sites Sample Site Up Stream Location Down Stream Location Source Locationa

Site 1 Building 5702 Building 5703 All wells operating day of positive sample

Site 2 Building 5200 Building 5318 All wells operating day of positive sample

Site 3 Building 2567 Range 113 Building 2554 Range 111 All wells operating day of positive sample

Site 4 Building 2205 Building 2085 Rifle Range Road All wells operating day of positive sample

Site 5 Building 2096 Building 2095 All wells operating day of positive sample

Site 6 Building 2143 Building 2145 All wells operating day of positive sample

Site 7 Building 3851 3846B West Side Road All wells operating day of positive sample

Site 8 3125C Upshur Avenue 3119A Upshur Avenue All wells operating day of positive sample

Site 9 Building 1816 Building 1934 All wells operating day of positive sample

Site 10 Building 1865 Building1850 All wells operating day of positive sample

Site 11 Building 1145 Building 1130 All wells operating day of positive sample a Contact EA Water Resources Manager for location

3.3 Additional Bacteriological Monitoring

Additional bacteriological monitoring will also take place as required by CCR, Title 22, Section 64421(b) for any of the following:

After construction or repair of wells After any water main installation or repair After construction, repair, or maintenance of storage facilities After any system pressure loss to less than 5 pounds per square inch.

3.4 General Physical Monitoring

Eight samples are collected each month concurrent with any weekly sampling from bacteriological sites. These samples will be drawn and analyzed for the General Physical properties of color, odor, and turbidity. One sample per month will be drawn and analyzed for TDS in accordance with Board Order R7-2016-0032 for the Combat Center’s Wastewater Treatment Facility.

3.5 Corrosion Parameter Monitoring

3.5.1 Lead and Copper Rule

The Combat Center water system was previously on reduced 3-year lead and copper monitoring at a minimum of 30 sites per CCR, Title 22, Section 64675 for a population of 18,811. Due to the installation of the P-192 RO Treatment Facility, sampling frequency will be 6-month monitoring for the 2023 year. If 90th percentiles meet action levels (after 6-month sampling), then monitor annually for 2 years with samples collected between June- September. If 90th percentiles meet action levels (after annual sampling), the system may return to 3-year monitoring per lead and copper rule. Samples are collected from the 30 approved sites listed below in Table 3-3.

Table 3-3. Lead and Copper Monitoring Locations Building Sample Site POC Phone # Comments

1587 Sink in the Male Head 1stLt. Conderman X5332 Hopkins Hall 1588 Male Head in Gym Ms. Dana X6440 East Gym 1607 Sink in Laundry Room DNCO 1st Floor X4054 HQBN 1607 Room 116 Head Sink DNCO 1st Floor X4054 HQBN 1607 Room 212 Head Sink DNCO 1st Floor X4054 HQBN 1607 Room 243 Head Sink DNCO 1st Floor X4054 HQBN 1616 Deep Sink in 1st Floor Laundry Room DNCO 1st Floor X3338 D Co. AABn 1616 Room 142 Head Sink DNCO 1st Floor X3338 D Co. AABn 1616 Room 254 Head Sink DNCO 1st Floor X3338 D Co. AABn 1616 Room 357 Head Sink DNCO 1st Floor X3338 D Co. AABn 1627 Sink in Laundry Room SSgt. Matthew (BOQ) X4652 MCCES Perm Perso 1627 Room 104 Head Sink SSgt. Matthew (BOQ) X4652 MCCES Perm Perso 1627 Room 229 Head Sink SSgt. Matthew (BOQ) X4652 MCCES Perm Perso 1627 Room 334 Head Sink SSgt. Matthew (BOQ) X4652 MCCES Perm Perso 1636 1st Floor D. F. across from Duty Room Ms. Bina 1st Floor Office (760) 910-2200 Bachelor Billeting 1636 Room 164 Laundry Sink Ms. Bina 1st Floor Office (760) 910-2200 Bachelor Billeting 1636 Room 234 Head Sink Ms. Bina 1st Floor Office (760) 910-2200 Bachelor Billeting 1636 Room 306 Head Sink Ms. Bina 1st Floor Office (760) 910-2200 Bachelor Billeting

Table 3-3. Lead and Copper Monitoring Locations Building Sample Site POC Phone # Comments

1636 Room 320 Head Sink Ms. Bina 1st Floor Office (760) 910-2200 Bachelor Billeting 1645 1st Floor Laundry Room 1st Floor Office X6642 Bachelor Billeting 1645 Room 150 Head Sink 1st Floor Office X6642 Bachelor Billeting 1645 Room 222 Head Sink 1st Floor Office X6642 Bachelor Billeting 1645 Room 336 Head Sink 1st Floor Office X6642 Bachelor Billeting 1645 Room 350 Head Sink 1st Floor Office X6642 Bachelor Billeting 1865 S-4 Room Sink in Head MSGySgt Medina X6026 MCCES 2020 S-4 Male Head Mr. Glenn X3959 ESD Engineers 2025 1st Floor Sink Female Head across S4 Mr. Glenn X3959 ESD Tire shop 2026 Male Head (sink) in Armory Mr. Glenn X3959 Armory 2044 2nd Floor Male Head Mr. Glenn X3959 ESD MT sections 2054 1st Floor Male Head Mr. Glenn X3959 ESD HQ

BOQ = Bachelor Officers’ Quarters

DNCO= Non-commissioned Officer on Duty

ESD = Exercise Support Division

HQ = headquarters

HQBN = Headquarters Battalion

MCCES = Marine Corps Communication-Electronics School

POC = Point of Contact

3.5.2 Additional Corrosion Parameter Monitoring

Water quality parameter monitoring (CCR, Title 22, Section 64681) consisting of pH, alkalinity, calcium, conductivity, water temperature, and LSI calculation is required for corrosion monitoring. The seven distribution lead and copper sites listed in Table 3-4 will be sampled monthly for 1 year and then per approved monitoring plan.

Table 3-4. Additional Corrosion Parameter Monitoring Locations Building Sample Site POC Phone # Comments

1607 Sink in Laundry Room DNCO 1st Floor X4054 HQBN

1616 Deep sink 1st Floor Laundry Room DNCO 1st Floor X3338 D Co. AABn

1627 Sink in Laundry Room SSgt. Matthew (BOQ) X4652 MCCES Perm Perso

1636 Room 164 Laundry Sink Ms. Bina 1st Floor Office (760) 910-2200 Bachelor Billeting

1645 1st Floor Laundry Rm 1st Floor Office X6642 Bachelor Billeting

2020 S-4 Male Head Mr. Glenn X3959 ESD Engineers

2054 1st Floor Male Head Mr. Glenn X3959 ESD HQ

3.6 Disinfection Byproduct Monitoring

Monitoring for total trihalomethanes (TTHM) and haloacetic acids (HAA5) will be sampled per the Division letter dated March 18, 2015. This letter authorizes the Combat Center to perform reduced monitoring in accordance with CCR, Title 22, Section 64534.2-D. The Combat Center will collect two dual sample sets per year as identified in Table 3-5: one sample at the highest TTHM location Site #17 (Sunshine Peak RV Park) during the 4th Quarter of each year and the second sample at the highest HAA5 location Site #2 (Building 5399) during the 3rd quarter of each year.

Table 3-5. Disinfection Byproduct Monitoring Sample Location PS Code Frequency

DBP2-Site 17 Sunshine Park RV Playground CA3610703_DST_602 Annually during 4th quarter of the year

DBP2-Site 2 Building 5399 CA3610703_DST_603 Annually during 3rd quarter of the year

DBP = disinfection byproduct monitoring

4 Reverse Osmosis Plant Monitoring

4.1 Treatment Plant Monitoring

Monitoring for the following constituents and process parameters at the treatment plant will be conducted according to the schedule in Table 4-1. Monitoring will be reported electronically using the PS-Codes below. For any treated sample that is above the MCL or NL, a confirmation sample should be obtained, and corrective action taken to ensure treatment is within compliance.

Table 4-1. Treatment Plant Monitoring Sample Site PS Code Analyte Name Frequency Analysis Performed By

RO Influent Raw CA3610703_017_017

Arsenic-lab Quarterly

Approved laboratory

Boron-lab Quarterly

Fluoride-lab Quarterly

Iron-lab Quarterly

Hexavalent Chromium-lab Quarterly

Manganese-lab Quarterly

TDS-lab Monthly

Primary RO Permeate CA3610703_018_018

TDS-lab Monthly

Approved laboratoryColiform as MPN-lab Quarterly

HPC-lab Quarterly

CCD / CCRO

Permeate CA3610703_019_019

TDS-lab Monthly

Approved laboratoryTotal Coliform as MPN-lab Quarterly

HPC-lab Quarterly

Table 4-1. Treatment Plant Monitoring Sample Site PS Code Analyte Name Frequency Analysis Performed By

Final RO Blend CA3610703_020_020

Arsenic-lab Monthly

Approved laboratory

Boron-lab Monthly

Fluoride-lab Monthly

Iron-lab Quarterly

Hexavalent Chromium-lab Monthly

Manganese-lab Quarterly

TDS-lab Monthly

LSI at Source Temperature-lab Monthly

LSI at 60°C-lab Monthly pH-lab Monthly

Alkalinity-lab Monthly

Calcium-lab Monthly

Conductivity-lab Monthly

HPC = heterotrophic plate count

MPN = most probable number

5 Figures A Hydraulic Map (Figure 5-1) and System Schematic (Figure 5-2) are provided in this section. A system Service Area Map is on file at the Combat Center Public Works and is available upon request.

Figure 5-1. Hydraulic Map

Figure 5-2. System Schematic