rainfall, ground-water, and ocean-tide data, guam, 1996

RAINFALL, GROUND-WATER, AND OCEAN-TIDE DATA,

GUAM, 1996

By Jill D. Torikai

U.S. GEOLOGICAL SURVEY

Open-File Report 97-239

Prepared in cooperation with the

GUAM ENVIRONMENTAL PROTECTION AGENCY

Honolulu, Hawaii 1997

U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY Gordon P. Eaton, Director

Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government

For sale by:U.S. Geological SurveyBranch of Information ServicesBox 25286Denver, CO 80225-0286

For additional information write to:District ChiefU.S. Geological Survey677 Ala Moana Blvd., Suite 415Honolulu, HI 96813

CONTENTSPage

Abstract...................................................................................................................... 1Introduction................................................................................................................ 1

Purpose and Scope......................................................................................... 2Acknowledgments.......................................................................................... 2

Rainfall....................................................................................................................... 2Ground Water............................................................................................................. 3

Pumpage......................................................................................................... 3Water Levels.................................................................................................. 3Water Quality................................................................................................. 4

Ocean Tides ............................................................................................................... 4Rainfall, Ground-Water, and Ocean-Tide Data......................................................... 8References Cited........................................................................................................ 67

in

FIGUREPage

1. Map showing rain gages, ground-water monitoring sites, and tide gage usedin the Water-Data Management Program, Guam, 1996 ....................................... 5

TABLE

1. Production wells and owners, Guam, 1996 ................

PLATE

1. Map showing ground-water sub-basins, management zones and production (in pocket) wells, Guam, 1996

IV

RAINFALL, GROUND-WATER, AND OCEAN-TIDE DATA, GUAM, 1996

by Jill D. Torikai

ABSTRACTRainfall, ground-water, and ocean-tide data were compiled for the island of Guam for

1996 as part of the Water-Data Management Program between the Guam Environmental Protection Agency and the U.S. Geological Survey. Ground-water data consist of pumpage, water levels, chloride concentrations, specific conductance, and temperature. Most data are from sites in northern Guam where ground-water development is concentrated, although pumpage and selected rainfall from southern Guam, including Cocos Island, are also in this report.

Rainfall on Guam in 1996 varied seasonally with greater rainfall during the period July through November 1996. Total ground-water pumpage on Guam in 1996 was 11,569 million gallons, or about 31.6 million gallons per day. Ground-water levels were less than 10 feet above mean sea level for all monitoring sites except well A-20, where water levels were 40 to 60 feet above mean sea level. The mean annual volume-weighted chloride concentrations from all management zones except zone 33 in Agana sub-basin were below 250 milligrams per liter. Monthly mean ocean-tide levels in 1996 ranged from -0.04 to 0.93 feet relative to mean sea level.

INTRODUCTIONThe U.S. Territory of Guam is located in the western Pacific Ocean at latitude IS^S'N.

and longitude 144°45'E. (fig. 1). The island is about 30 miles (mi) long, ranges in width from 4to 12 mi and has an area of 212 mi2 . The northern half of Guam is largely composed of permeable limestone, whereas the southern half is underlain by volcanic rock with low permeability (Ward and others, 1965). Ground-water development is concentrated in northern Guam, where it is pumped from a limestone aquifer.

Potable water on Guam is supplied by the Government of Guam through the Guam Waterworks Authority (GWA), and by the U.S. military. GWA serves most of the civilian population by widespread ground-water pumping in northern Guam. The U.S. Air Force also uses ground water to supply its installations in northern Guam. The U.S. Navy's water-supply system uses surface water stored in Fena Valley Reservoir, which provides water to the U.S. Navy's installations and to some of the civilian population in southern Guam. Privately owned wells are scattered throughout Guam for industries, irrigation, and commercial ventures such as resorts and golf courses.

The total population of Guam in 1990 was about 199,000, of which one-third was U.S. military (U.S. Bureau of the Census, written cornmun., 1997). Population density and urban growth are greatest in the northern and central regions. The southern region remains more rural.

In 1972, the Guam Environmental Protection Agency began a cooperative project with the U.S. Geological Survey (USGS) to develop and maintain a ground-water database management system. The Water-Data Management Program (WDMP), as it is known, involves the collection and compilation of rainfall, ground-water, and ocean-tide data. The program's database integrates water-resource information for Guam from multiple agencies.

Purpose and ScopeThis report presents the 1996 rainfall, ground-water, and ocean-tide data that were

collected and compiled for Guam. The report contains the following:

Rainfall monthly rainfall at 17 sites

Ground Water monthly ground-water pumpage from 160 production wells monthly ground-water levels at 9 monitoring sites daily mean and monthly mean ground-water levels at 8 monitoring sites chloride concentration of water from 160 production wells pumpage and chloride concentration of water by management zone chloride concentration, specific conductance, and temperature of water from 3

monitoring wells vertical chloride-concentration profiles of 3 monitoring wells

Ocean Tides daily mean and monthly mean ocean-tide levels at 1 tide gage

AcknowledgmentsData were compiled from the following agencies:

Guam Environmental Protection Agency (GEPA)Guam Waterworks Authority (GWA), formerly known as the Public Utility

Agency of Guam (PUAG) National Weather Service (NWS) U.S. Air Force (USAF) U.S. Navy (USN)

Assistance from these agencies in support of the WDMP is gratefully acknowledged. Logistical support from the staff of GEPA is appreciated.

RAINFALLA dry season occurs on Guam from about January through May, and a wet season occurs

from about July through November; June and December are transitional months (Ward and others, 1965). Heavy and prolonged rainfall are usually associated with typhoons that pass near or over Guam. According to Ward and others (1965) mean annual rainfall ranges from about 80 inches on the coastal lowlands to about 100 inches on the uplands in southern Guam. Droughts are frequent.

Rainfall data is compiled from 17 selected rain gages located throughout Guam. The gages are owned and operated by the NWS, USAF, USN, or the USGS. Data from the USAF and the NWS are published in the series "Climatological Data, Hawaii and Pacific" (National Oceanic and Atmospheric Administration, 1996). All other data are provisional.

Monthly rainfall on Guam for 1996 are displayed in figure Al and in table Al. Seasonal rainfall in 1996 was evident with most stations showing increased rainfall for the period July through November.

GROUND WATERGround-water data include pumpage, water levels, and the water-quality characteristics

of chloride concentration, specific conductance, and temperature. For management purposes, northern Guam was divided into six ground-water sub-basins, and further divided into 47 management zones by Camp, Dresser and McKee, Inc. (1982) (plate 1). Management zones were not designated for coastal areas. For this report, a coastal area within a sub-basin is referred to as a "coastal" management zone that extends from a sub-basin boundary to the coast, and is named after the adjacent sub-basin. Ground-water data from southern Guam, including Cocos Island, is also in this report, although it is not part of any sub-basin.

PumpageGround water is pumped by the GWA, USAF, USN, and private well owners. Table 1 is

a list of 1996 production wells and respective well owners. The GWA, USAF, and USN provide their respective pumpage data to the USGS, and GEPA provides the pumpage data for all privately owned wells.

In 1996, 160 production wells were active, although wells BCC, MCR-1, MJ-2, and TMT were not pumped. New production wells that were pumped in 1996 include: D-22A, F-17, F-18, IE-2, and Y-12. Ground-water pumpage data for 1996 are displayed in figures Bl, B2, and B3, and in tables Bl and B2. Pumpage data are presented by sub-basin, management zone, and individual well. Pumpage from wells D-22A, F-17, F-18, EE-2, NCS-9, and Y-12 are not included in sub-basin and management-zone pumpage totals because assignments to specific management zones are not available.

Total ground-water pumpage on Guam in 1996 was 11,569 million gallons or about 31.6 million gallons per day. Pumpage from the Agana and Yigo sub-basins combined accounted for about 73 percent of total Guam pumpage. About 14 percent was pumped from the Finegayan sub-basin, and the remaining 13 percent was pumped from the Agafo Gumas, Andersen, and Mangilao sub-basins, and from southern Guam.

Water LevelsGround-water levels are measured by the USGS and GEPA. The USGS measures water

levels from eight monitoring sites (seven wells and one tunnel) that are equipped with digital recorders. The recorders measure water levels to the nearest 0.01 feet (ft) at 30-minute intervals. Ground-water levels at sites measured by the USGS were 2 to 7 ft above mean sea level at wells A-16, BPM-1, EX-7, EX-10, M-10A, and M-l 1 and at ACEORP Tunnel; well A-20 was 40 to 60 ft above mean sea level (fig. B4 and table B3). Water levels peaked in August or September at wells BPM-1, M-10A, and M-l 1, which are the only wells with complete data for 1996.

GEPA measures water levels at nine monitoring sites (eight wells and one spring) each month using a steel tape. Monthly water-level data for sites measured by GEPA are available for the period May through December 1996. During this period, water levels were less than 10 ft above mean sea level (fig. B5 and table B4). The water levels peaked in September or October at sites EX-4, EX-6, EX-9, Father Duenas, and GHURA-Dededo. Trends are not discernible for Agana Spring and wells Agana 147, EX-1, and Harmon 107 because of the incomplete data during the period May through December 1996.

Water QualityWater-quality characteristics presented include chloride concentration, specific

conductance, and temperature. In this report, chloride concentration is used as a quantitative measure of salinity. A chloride concentration of 250 milligrams per liter (mg/L) is the secondary maximum contaminant level (SMCL) under secondary drinking-water standards (U.S. Environmental Protection Agency, 1991). Secondary standards are not enforceable limits, but instead establish goals for constituents that may affect the aesthetic qualities of drinking water, such as taste or color. For comparison, the chloride concentration in seawater is about 20,000 mg/L.

Chloride concentrations of water are analyzed quarterly by the GWA from their production wells (table 1). Wells owned by the USAF, USN, and privately owned wells are sampled once a year with chloride-concentration analyses performed by GEPA. Chloride concentration data for 1996 are displayed in figure B3 and in table B5 for production wells.

For management purposes, chloride concentrations are further presented as a mean annual volume-weighted chloride concentration when representing the water from a management zone (table B6). Mean annual volume-weighted chloride concentrations are calculated by adding the products of total annual pumpage and mean annual chloride concentration for every sampled well in the zone, and then dividing that sum by the total pumpage for those wells. Mean annual volume-weighted chloride concentration accounts for pumpage and weights chloride concentrations from those wells which pump more water. Mean annual volume-weighted chloride concentrations were calculated only if both pumpage and chloride-concentration data were available for at least two wells in a given management zone.

The mean annual volume-weighted chloride concentration of water from all management zones except one (table B6) was below the 250 mg/L secondary drinking-water standard established by the U.S. Environmental Protection Agency (1991). Only the water representative of management zone 33 in the Agana sub-basin was above the secondary limit at 318 mg/L. The high mean annual volume-weighted chloride concentration in zone 33 is a concern because pumpage from this zone is about 26 percent of the total pumpage from Agana sub-basin. Water from six of the nine wells in zone 33 had mean annual chloride concentrations above 250 mg/L in 1996 (table B5).

In 1996, chloride concentration, specific conductance, and temperature were measured by the USGS for water from three monitoring wells using a downhole sampler (table B7). Vertical chloride-concentration profiles of the monitoring wells are shown in figure B6. The "EX" designation in the monitoring well number indicates "exploratory" by which these wells were initially known.

OCEAN TIDESTides at Guam are semidiurnal, with two high tides and two low tides each day. The

mean tidal range is 1.6 feet (ft) (Ward and others, 1965). The tide gage at Agana is operated by the USGS. Ocean levels are measured on a digital recorder to the nearest 0.01 ft at 15-minute intervals.

Ocean-tide levels at Agana in 1996 are displayed in figure Cl and in table Cl. The greatest monthly mean ocean-tide level of 0.93 ft above mean sea level was during July, and the smallest monthly mean level of -0.04 ft below mean sea level was during December. The monthly mean tidal range in 1996 was 0.97 ft.

120°40

20°N -

0° g

20°S

140° 160°E

_GHURA-DededoTumonBay 7 " Deded°° <*> Dededo(NWS>

' ' M-11« ^Dededo (USGS)

0 2 KILOMETERS

EXPLANATION

<$> RAIN GAGE AND IDENTIFICATIOr i

A-20GROUND-WATER MONITORING SITE

AND IDENTIFICATION

T TIDE GAGE

Base digitized from U.S. Geological Survey Island of Guam, 1:50,000, 1978

Figure 1. Rain gages, ground-water monitoring sites, and tide gage used in the Water-Data Management Program, Guam, 1996.

Table 1. Production wells and owners, Guam, 1996

Well Owner1

A-l Guam Waterworks Authority

A-2 Guam Waterworks Authority








A- 10 Guam Waterworks Authority

A- 1 2 Guam Waterworks Authority








A-2 3 Guam Waterworks Authority








AG-1 Guam Waterworks Authority

AG-2 Guam Waterworks Authority

BCC Mawashima

BPM(AF) U.S. Air Force

Well Owner1

CCP- 1 Country Club of the Pacific

CCP-2 Country Club of the Pacific





CIR- 1 ,2 Cocos Island Resort

D-l Guam Waterworks Authority

D-2 Guam Waterworks Authority








D- 1 0 Guam Waterworks Authority




D-l 4 Guam Waterworks Authority



D-l 7 Guam Waterworks Authority




D-2 1 Guam Waterworks Authority

D-22A Guam Waterworks Authority


Well Owner1

EX-5A Guam Waterworks Authority

EX- 1 1 Guam Waterworks Authority

F-l Guam Waterworks Authority

F-2 Guam Waterworks Authority








F- 1 0 Guam Waterworks Authority

F-l 1 Guam Waterworks Authority





F-l 7 Guam Waterworks Authority


FFH-3 Fadian Fish Hatchery


FFH-5A Fadian Fish Hatchery



FM Foremost Foods, Inc.

GH-501 Guam Waterworks Authority

GOR-1 Shell Guam, Inc.

H-l Guam Waterworks Authority

HGC-2 Guam Waterworks Authority

HGC-3 Hatsuho Country Club

Table 1. Production wells and owners, Guam, 1996 Continued

Well Owner1

HRP-l Hawaiian Rock Products

HRP-2 Hawaiian Rock Products

IE-1 Island Equipment Co.

IE-2 Island Equipment Co.

M-l Guam Waterworks Authority

M-2 Guam Waterworks Authority








M-l 2 Guam Waterworks Authority



M-16B Guam Waterworks Authority

M-17A Guam Waterworks Authority

M-17B Guam Waterworks Authority

M-20A Guam Waterworks Authority

MCR-1 Marbo Cave Resort

MGC- 1 Mangilao Golf Course

MGC-2 Mangilao Golf Course


Well Owner1


MHR-1 Manenggon Hills Resort

MJ-1 Guam Waterworks Authority

MJ-2 Guam Waterworks Authority

MW-1 U.S. Air Force

MW-2 U.S. Air Force

MW-3 U.S. Air Force

MW-5 U.S. Air Force

MW-6 U.S. Air Force

MW-7 U.S. Air Force

MW-8 U.S. Air Force

MW-9 U.S. Air Force

NAS Guam Waterworks Authority

NCS-2 U.S. Navy

NCS(B)-3 U.S. Navy

NCS-5 U.S. Navy

NCS-6 U.S. Navy

NCS-7 U.S. Navy

NCS(B)-8 U.S. Navy

NCS-9 U.S. Navy

NCS-A U.S. Navy

NCS-B U.S. Navy

NRMC-1 U.S. Navy

NRMC-2 U.S. Navy

Well Owner1

NRMC-3 U.S. Navy

PBI-1 Perez Brothers, Inc.

PIC-1 Pacific Islands Club

RCA-1 MCI

TGC- 1 Takayama Golf Course

TGR- 1 Talofofo Golf Course

TGR-2 Talofofo Golf Course





TMT U.S. Air Force

Y-l Guam Waterworks Authority

Y-2 Guam Waterworks Authority


Y-4A Guam Waterworks Authority


Y-6(506) Guam Waterworks Authority



Y-l 2 Guam Waterworks Authority

Y-l 5 Guam Waterworks Authority

1 Owner information for all wells other than those owned by the Guam Waterworks Authority, U.S. Air Force, and U.S. Navy was provided by the Guam Environmental Protection Agency.

RAINFALL, GROUND-WATER, AND OCEAN-TIDE DATAGUAM 1996

Page A. Rainfall

Figure Al. Monthly rainfall at selected sites .................................................................. 10

Table Al. Monthly rainfall at selected sites .................................................................. 13

B. Ground Water

Figures Bl. Monthly ground-water pumpage by sub-basin.............................................. 15B2. Monthly ground-water pumpage by management zones in a sub-basin

a. Agafo Gumas sub-basin.......................................................................... 16b. Agana sub-basin...................................................................................... 17c. Andersen sub-basin................................................................................. 18d. Finegayan sub-basin................................................................................ 19e. Mangilao sub-basin................................................................................. 20f. Yigo sub-basin......................................................................................... 21g. Southern Guam....................................................................................... 22

B3. Chloride concentration and monthly ground-water pumpage forproduction wells.......................................................................................... 23

B4. Daily mean and monthly mean ground-water levels at monitoring sites.... 37B5. Monthly ground-water levels at monitoring sites....................................... 41B6. Vertical chloride-concentration profiles of monitoring wells..................... 42

Tables Bl. Monthly ground-water pumpage by sub-basin........................................... 43B2. Monthly ground-water pumpage of production wells ................................ 44B3. Daily mean ground-water levels at monitoring sites .................................. 47B4. Monthly ground-water levels at monitoring sites....................................... 55B5. Chloride concentration of water from production wells............................. 56B6. Ground-water pumpage and chloride concentration by management

zone and well.............................................................................................. 59B7. Water-quality data for monitoring wells..................................................... 63

C. Ocean Tides

Figure C1. Daily mean and monthly mean ocean-tide levels at Agana.......................... 65

Table Cl. Daily mean ocean-tide levels at Agana......................................................... 66

SECTION A

Rainfall

Agat (NWS)1 1

: M

1 1

1

1

1 1

M M M

i i

_

-

.-

Almagosa (USGS)

20

10

n

i

-

M M

i

M

-

-

M::

C/3 LLJXo

<oc

Andersen AFB (USAF)

20

10

0

30

20

10

0

30

20

10

0

30

20

10

0

'-

I 1

i i

-

j

Dededo (NWS)

'-

i i

-

Dededo (USGS)

-

i i

MM M :

i

Fena WTP (USN)

'-

J F M A M

i i

-

J J A S 0 N D

1996

M indicates missing data, and appears with rainfall if 1 to 9 daily rainfall values are missing, or with zero rainfall if more than 10 daily rainfall values are missing.

Figure Al. Monthly rainfall at selected sites, Guam, 1996. Monthly rainfall data from the Andersen AFB gag", and all National Weather Service gages for January through September 1996 are from the National Oceanic and Atmospheric Administration, 1996. All other data are provisional.

10

Fena Reservoir Pump Station (USGS)

20

10

n

_i

I

M

M\

: -

Guam MAS (NWS)

20

10

n

i i i i i i i i

i M M M M M M MMM

i i i i i i i i

_

I

COLUI O

LL2<CC

Guam WSMO (NWS)

?o

10

n

-

i i i

I I I I I I

.-----

Inarajan Ag Stn (NWS)

20

10

n

i i i i i i i i i i

: Data not available as monthly totals for January through November 1 996.

i i i i i i i i i i

Mangilao (NWS)

20

10

0

30

20

10

0

.

-

i

1

i _

;Mount Chachao (USGS)

.

: M

J F M A

I

I

.

M

MJJASOND

1996


Figure Al. Monthly rainfall at selected sites, Guam, 1996. Monthly rainfall data from the Andersen AFB gag~. and all National Weather Service gages for January through September 1996 are from the National Oceanic and Atmospheric Administration, 1996. All other data are provisional Continued.

11

NPMOCW (USN)

Umatac 1 (NWS)i i i i i i i i i r

M M M M M M M

J_______I_______I_______I_______I_______I

M

LLJIo

<DC

Umatac (USGS)

20

10

n

.

-

i

1

.

-

30

20 -

10 -

Windward Hills (USGS).

-

1

_

---

.-

30

20

10

Yigo (NWS)i i i i i i

M

M M J J A

1996

O N D


Figure Al. Monthly rainfall at selected sites, Guam, 1996. Monthly rainfall data from the Andersen AFB gage and all National Weather Service gages for January through September 1996 are from the National Oceanic and Atmospheric Administration, 1996. All other data are provisional. Continued.

12

Table Al. Monthly rainfall at selected sites, Guam, 1996[Values are in inches; *, rainfall amount is being carried forward to next month's total, and may include amounts from the previous month(s); M, is appended to values with 1 to 9 daily values missing, and M appears alone if 10 or more daily values are missing; NWS, National Weather Service; USAF, U.S. Air Force; USN, U.S. Navy; USGS, U.S. Geological Survey.]

Month

JAN FEE MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

Agat NWS

3.73 M

3.449.025.301.62

12.26MMM

24.20 9.77

Almagosa USGS

M M

5.40 M9.844.804.32

17.6414.4020.7610.0814.76

M

Andersen AFB USAF

7.189.712.484.822.133.41

19.0310.7510.948.48

16.468.13

Dededo NWS

8.079.354.126.454.375.78

18.5117.2615.0110.0715.457.14

Dededo USGS

9.12 8.52 3.00 4.92 3.36 4.56 8.40 6.00

10.44MMM

Fena WTP USN

6.405.453.587.503.471.91

13.379.049.291.994.491.95

Month Fena Reservoir Pump Station USGS

Guam NAS NWS

Guam WSMO NWS

Inarajan Ag Stn NWS

Mangilao NWS

Mount Chachao USGS


11.286.485.649.483.843.12

12.12 12.60 16.924.20 M

13.80 M 12.84

M M M M M M M M M

8.6616.557.86

11.867.213.405.143.285.34

16.4012.4819.386.83

16.087.64

2.99 * 12.33 * 17.21 * 28.04 * 30.32 * 33.55 * 35.45 * 50.47 * 56.32 * 12.04 * 11.00 M 10.34

13.077.933.154.151.384.18

13.6615.0717.248.41

18.587.62

6.72 M8.043.129.485.163.48

19.80 13.80 19.92 12.24 19.56

M

Month NPMOCW USN

Umatac 1 NWS

Umatac USGS

Windward Hills USGS

Yigo NWS


7.874.151.934.552.400.76

13.3115.4814.7010.0015.6311.17

10.14 4.20

MMMMMMM

6.93 M 8.96 2.12

5.644.927.202.161.32

8864

55

16.32

16.2017.28

11.646.365.16

11.283.242.6419.3221.0018.608.28

15.48M

8.110. 68 M0.140.710.270.54.30.50.01,63.90

0.82

NOTE: Monthly rainfall data from the Andersen AFB gage and all NWS gages for January through September 1996 are from published data by the National Oceanic and Atmospheric Administration (NOAA) in the series "Climatological Data, Hawaii and Pacific," 1996, v. 92, no. 1-9. All other monthly rainfall data have rot been published by the respective agencies and are considered provisional.

13

SECTION B

Ground Water

14

CO

1,200

1,100 -

EXPLANATION

D Southern Guam

0 Yigosub-basin

Mangilao sub-basin

Finegayan sub-basin

Andersen sub-basin

Agana sub-basin

Agafo Gumas sub-basin

Figure Bl. Monthly ground-water pumpage by sub-basin, Guam, 1996. Sub-basin designations are from Camp, Dresser and McKee, Inc. (1982). Pumpage from southern Guam is included. Pumpage from wells D-22A, F-17, F-18, IE-2, NCS-9, and Y-12 are not included in sub-basin pumpage totals. Data are from the Guam Environ mental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.

15

AGAFO GUMAS SUB-BASIN Total 1996 Pumpage: 342.0 Mgal

U)

O

0

O

LU 0

Management zone 16 (342.0 Mgal)

JFMAMJJASOND 1996

Figure B2a. Monthly ground-water pumpage by management zone, Agafo Gumas sub-basin, Guam, 1996. Sub-basin and management-zone designations are from Camp, Dresser and McKee, Inc. (1982). Pumpage from wells D-22A, F-17, F-18, IE-2, NCS-9, and Y-12 are not included in sub-basin and management-zone pumpage totals. Data are from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Total 1996 pumpage is indicated in parentheses for the management zone.

16

AGANA SUB-BASIN Total 1996 Pumpage: 4,156.0 Mgal

CO

g

o o

LLJCD <Q.2 =) Q.

200

150

100

50

Management zone 1 (91.2 Mgal) Management zone 2 (452.3 Mgal)n i i r i i i r

Management zone 3 (1,564.5 Mgal)

Management zone 5 (9.1 Mgal)i i i i i r

i i i i i i i i i

Management zone 31 (30.3 Mgal)i i i i i i i i i i r


15

10

5

n

_~

_

40

20

0

40

30

20

10

0

20

15

10

5

0

120

100

80

60

40

20

0

40

30

20

10

n

-

-

-


-

i i

-

-


-

-

i

-


-

i i i i i i

-

Management zone coastal (383.0 Mgal)

_

-

J FMAMJ JASOND 1996

JFMAMJJASOND 1996

Figure B2b. Monthly ground-water pumpage by management zone, Agana sub-basin, Guam, 1996. Sub-basin and management-zone designations are from Camp, Dresser and McKee, Inc. (1982). Pumpage from wells D-22A, F-17, F-18, IE-2, NCS-9, and Y-12 are not included in sub-basin and management-zone pumpage totals. Data are from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Total 1996 pumpage is indicated in parentheses for the management zone.

17

O)

O

D Q.

ANDERSEN SUB-BASIN Total 1996 Pumpage: 302.6 Mgal


1 4°-j 30

I> 20

^ 10

W o0 °

-

-

i r M A M 1 1 A C n M

-

-

-

n

1996


0.8

0.6

0.4

0.2

n

I I i I I I I I I I-

_ _

-

-

i . i 1

-

-

i i i i i

JFMAMJJASOND 1996

Figure B2c. Monthly ground-water pumpage by management zone, Andersen sub-basin, Guam, 1996. Sub-basin and management-zone designations are from Camp, Dresser and McKee, Inc. (1982). Pumpage from wells D-22A, F-17, F-18, IE-2, NCS-9, and Y-12 are not included in sub-basin and management-zone pumpage totals. Data are from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Total 1996 pumpage is indicated in parentheses for the management zone.

18

FINEGAYAN SUB-BASIN Total 1996 Pumpage: 1,564.0 Mgal

COz g

CDZo

LU CD

Management zone 18 (300.4 Mgal) Management zone 19 (144.8 Mgal)i i i i i i i i i i r


Management zone 43 (334.2 Mgal)\ i i i i i i i i i r

JFMAMJJASOND 1996

20

10

0

60

40

20

0

20

15

10

5

n

-


-.

-


-

i i

-

JFMAMJJASOND 1996

Figure B2d. Monthly ground-water pumpage by management zone, Finegayan sub-basin, Guam, 1996. Sub-basin and management-zone designations are from Camp, Dresser and McKee, Inc. (1982). Pumpage from wells D-22A, F-17, F-18, IE-2, NCS-9, and Y-12 are not included in sub-basin and management-zone pumpage totals. Data are from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Total 1996 pumpage is indicated in parentheses for the management zone.

19

MANGILAO SUB-BASIN Total 1996 Pumpage: 762.1 Mgal


30

20

10

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-

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PUMPAGE, IN MILLK-i _L ro -1 ro (

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6

4

2

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Management zone 37 (0 Mgal)i i i i i i i i i i r

No pumpage in 1996.

i i i i i i i i i i iJFMAMJJASOND

1996

J FMAMJ JASOND 1996

Figure B2e. Monthly ground-water pumpage by management zone, Mangilao sub-basin, Guam, 1996. Sub-basin and management-zone designations are from Camp, Dresser and McKee, Inc. (1982). Pumpage from wells D-22A, F-17, F-18, IE-2, NCS-9, and Y-12 are not included in sub-basin and management-zone pumpage totals. Data are from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Total 1996 pumpage is indicated in parentheses for the management zone.

20

YIGO SUB-BASIN Total 1996 Pumpage: 4,297.6 Mgal


N MILLION GALLONS

en -trow*. -j- ro w -t

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PUMPAGE, _t-j.ro SO en o 000

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60

40

20

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-

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-

-

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1996

60

40

20

60

40

20

Management zone 25 (260.5 Mgal)i i i i i i i i i i r


Management zone 46 (0 Mgal)

Nopumpage in 1996.

Management zone coastal (32.6 Mgal)\ i i i i i i i i i r

JFMAMJJASOND 1996

Figure B2f. Monthly ground-water pumpage by management zone, Yigo sub-basin, Guam, 1996. Sub-basin and management-zone designations are from Camp, Dresser and McKee, Inc. (1982). Pumpage from wells D-22A, F-17, F-18, IE-2, NCS-9, and Y-12 are not included in sub-basin and management-zone pumpage totals. Data are from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Total 1996 pumpage is indicated in parentheses for the management zone.

21

SOUTHERN GUAM Total 1996 Pumpage: 144.9 Mgal

COz g

zO 15

-" 102

Z 5

U n

- -

-

JFMAMJJASOND 1996

Figure B2g. Monthly ground-water pumpage in southern Guam, 1996.Pumpage from wells D-22A, F-17, F-18, IE-2, NCS-9, and Y-12 are not included in pumpage totals. Data arefrom the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.

22

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40

30

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400

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1996EXPLANATION

| | pumpage + chloride concentration n no data

Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data a'- from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.

23

A-14 A-15

40

30

20

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0

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40

30

20

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FMAMJ J ASOND 1996

J FMAMJ JASOND 1996

EXPLANATION

| | pumpage + chloride concentration n no data

Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data a~e from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Continued.

24

A-31 A-32

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Well not in use. Chloride- concentration data not available

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1996

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400

300

200

100

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EXPLANATION [ [ pumpage + chloride concentration n no data

Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data are from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.-Continued.

25

CIR-1,2 D-1

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20

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m" 30CD<Q_ 20:E ~^Q_

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40

30

20

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100

80

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40

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Chloride-concentration data not available.

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f + + +

D-4

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1996J FMAMJ J

1996

A S O N D

EXPLANATION pumpage + chloride concentration n no data

Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data are from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Continued.

26

D-12 D-13

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nFMAMJ J ASOND

1996

JFMAMJ JASON

1996

EXPLANATION | j pumpage + chloride concentration n no data

Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data ere from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.-Continued.

27

EX-5A EX-11

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1996



28

F-11 F-12

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200

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80

60

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1996

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40

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1996

pumpageEXPLANATION

+ chloride concentration n no data

Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data are from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.-Continued.

29

FM GH-501\ \ i i \ \ \ \ i i r

GOR-1i i i i i i i i i i r

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i

+

i it ill

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200

150

100

50

nJ FMAMJ JASOND

1996

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100

50

nJ FMAMJ JASO

1996

N D


Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data ere from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.~Continued.

30

M-3 M-4

ON GALLONS

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CHLORIDE CONCENTRATION, IN Ml

FMAMJJASOND 1996

JFMAMJJASOND 1996


Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data sr& from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Continued.

31

M-17B M-20Ai i \ i i i i i i i r

MCR-1I I T I \ I I I I I T

Well not in use. Chloride- concentration data not available.


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JFMAMJJASOND

1996

100

80

60

40

20

0

100

80

60

40

20

0

300

200

100

300

200

100

0

50

40

30

20

10

0

80

60

40

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1996

ND

EXPLANATION

[ | pumpage + chloride concentration n no data


32

MW-3 MW-520

10

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tu

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20

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20

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80

60

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30

20

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JFMAMJJASOND

1996

100

80

60

40

20

0

250

200

150

100

50

0

80

60

40

20

0

20

10

n n n n n

MW-720

10

1 1 1 i i i i i

-

n

'_

n n n n n n.i i i i i

40

20

n

MW-9

30

20

10

n


-f-

-

-

n_

n n n n n n.i i i i i

40

20

n

rr LU

rr LU o.CO

rr CD

NCS-220

10 -

I I I I I I I I I I

+-

I

-

-

150

100

50

n

NCS-5108

6

4

2

0

20

10 -

49?

400

300

200

100

0

rri-LLJ Oz o o LUQrr Oi o

NCS-7

-ri i i

-

30

20

10

n

JFMAMJJASOND

1996


Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data ere from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. Continued.

33

NCS(B)-8 NCS-9

.ION GALLONS

-> ro _L ro -». t\

3 O OO O OO O C

PUMPAGE, IN MILL

o o b b

o -» _L ro _L ro

3 CJI OO O OO O OC

1 1 1

I

NCS-Aii ii


i i 1

NRMC-1ii iii

NRMC-3i i i i

PIC-1

-

-

-

-

-

iii i i i i i i i


TGC-1i i i i i i i i

i

100

80

60 10

40

20

0 0

100 20

80

60 10

40

20

0 0

20 20

10 10

0 0

4

20 3

10

1

0 0

50 1.0

40

30 0.5

20

10

0 0

50 5

40 4

30 3

20 2

10 1

n n

(i i i


-

-

NCS-Bi

H

i i i

h

~nu-

NRMC-2

H

i iiih

-

PBI-1i

i i i i i-

-

RCA-1i

i

i i

i i i iTGR-1

i i i i i i

H_ H_^ i

-

100

80

60

40

20

0

150

100

50 DC LLJ

o t

DC LLJ

50 Q_

40 |

30 ^

20 ®

3-i.rocoo -» 10 o en -^ -» o -« OOO OO OOCJI O

CHLORIDE CONCENTRATION, IN MILL

JFMAMJJASOND 1996

JFMAMJJASOND 1996


Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data r re from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.-Continued.

34

TGR-2 TGR-3

COz

<CD

O_i .j2 Z

LU CD < CL2 ^ CL

N> o

n i i i i i i i i i r+

i i i i i i i i i

TGR-4i n i r \ i r i r

TGR-6

-r-T-i

Y-1

-» o


-b

Y-3

-h

30

20

10

0

30

20

10+

0


Y-5i

FMAMJJASOND 1996

-

_ +

I I I I I

I

20

10

n

TGR-5I I I I I I I I I I T 30

20

10DC LU

0 t

TMT

0

\ \ i i i i i i i i r

Well not in use. Chloride- concentration data not available.

Y-240 20

30

20 10

10

0 0

40 30

30

20

10

0

80 30

60

40

20

0

-I-

ii iii ii

+

OC LU CLCO

Y-4A

20

10

n

i i i i i i ii

L ~r ~r

_

i

_

_

30

20

10

n

OCI-LLJ O

O O LUQOCoXo

Y-6(506)

JFMAMJJASOND 1996

EXPLANATION [ | pumpage + chloride concentration n no data

Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data rre from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.-Continued.

35

Y-7co 40

O 30_i< 20- C5Z 10 O_i ol

h

~~

+ +

_j ^ Y-12Z 40 |

m" 30C5

OL 20:EQL 1 °

0

-

-

J F M A M J J A S

+

O N

Y-9fn r

-

^

30 43-

20

10 1

n n

f

-

+ +

Y-15on on

-

-

60 60

40 40

20 20

n. n.

-

tr-

D J F M

+

A M1996

FXPI ANATIDN

J

.

J A S

+

O

1996

DCLUH

DCLUOL

-

ou yj ^\ivdom

0 C OJ T-

O^n I

1

-

CC40 £

LU O

20 ZO O

n MI

N D 9DC

3XO

pumpage chloride concentration n no data

Figure B3. Chloride concentration and monthly ground-water pumpage for production wells, Guam, 1996. Data rre from the Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.- Continued.

36

WellA-16LUsLU CO

LU2oLU

ILU QC

ti LU

LU

£QC LU

EXPLANATION

daily mean water level

monthly mean water level

M M J J 1996

O D

Well A-20LU

SaCO

1oLU

LU QC

t3LU

LU

SDC LU

60

50

n r i i i r

EXPLANATION



no data

JFMAMJJAS1996

O D

Figure B4. Daily mean and monthly mean ground-water levels at monitoring sites, Guam, 1996. Data are from the U.S. Geological Survey and are provisional.

37

ACEORP TunnelLU

LU

LU COzLU 2

O

LU

1LU EC

LULU

LU

5ECLU

SE

ii ii ii i i i

EXPLANATION



no data

2 i_____i____i_____i_____i_____i_____i_____i_____i_____i_____i_____i___ JFMAMJJASOND

1996

Well BPM-1LU

LU

LU CO

LU

LU >

LU EC

LU LU LL

LU

LU_lECLU

EXPLANATION



i i

M M J J

1996

O

Figure B4. Daily mean and monthly mean ground-water levels at monitoring sites, Guam, 1996. Data are from the U.S. Geological Survey and are provisional. Continued.

38

Well EX-7LLJ

UJ

UJ

UJ

UJ>I-

LU DC

UJ UJ

UJ >UJ

ccUJI

EXPLANATION



M M J J 1996

O D

Well EX-10UJ> 4UJ

UJ

UJ

UJ

UJcc (DUJ

UJ>UJ

ccUJ

no data

\ i i i i r

EXPLANATION



M M J J 1996

O D

Figure B4. Daily mean and monthly mean ground-water levels at monitoring sites, Guam, 1996. Data are from the U.S. Geological Survey and are provisional. Continued.

39

Well M-10ALJJ

HI

HIcn

HI2 O

HI

HI DC

HI HI LL

HI

HI _JDC HI

I

EXPLANATION



M M J J 1996

O D

Well M-11HI

HI

HI CO

HI 6

O

HI

1 5HI DC

HI H

-_ 4HI

HI

DC HI I- oI 3

I I I I I I I I I I

EXPLANATION



I______I______I______I______I_______I

M M J J A S 1996

O N D

Figure B4. Daily mean and monthly mean ground-water levels at monitoring sites, Guam, 1996. Data are from the U.S. Geological Survey and are provisional Continued.

40

Agana 147 Agana Spring

_JLLJ>LiJ_J<LiJCOZ

LU

O\-

LLJ

iLUDC1-LJJ LIJLL

Z

_fLLJ

LLJ_JDC LJJ

<^

IU

8

6

4

2

0 V,

l l l l l l l l l l l.

_|_ ++ +

-

-

i i l l l i i i i i i

IU

8

6

4

2

n

1 1 1 1 1 1 1 1 1 1 1

_|_ + +

+ +

-

-

1 1 1 1 1 1 1 1 1 1 1

EX-1 EX-410 i * n

8

6

4

2

0

I I I I I I I I I I L

- ~T~ i ~t~ -I i

- ' ' -

-

-

I I I I I I I I I I I

1 U

8

6

4

2

0

1 1 1 1 1 1 1 I 1 1 1

- i -_[_ ~ _[_ i

- _i_ i _i_ ~r ~r

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EX-6 EX-9ID

8

6

4

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0

I I I I I I I I I I I

-

I I _[__[_ _[__[_ I I -~r~ ~1~ ~t~ ~T~ ~r ~1~ ~1~ T~-


1 W

8

6

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Father Duenas GHURA-Dededo10 i ""

8

6

4

2

0


++

-


1 W

8

6

4

2

n


_

-

+ ++ + ++ ++-

1 1 1 l l l l l l 1 1

JFMAMJJASONDHarmon107 -jggg

10

8

6

4

2

n

-

-

-

, t , , , , , , ,JFMAMJJASOND

1996

Figure B5. Monthly ground-water levels at monitoring sites, Guam, 1996. Father Duenas site has unknown amount of oil floating on water. Data are from the Guam Environmental Protection Agency.

41

Ill

LLJ CO

-50

-100

gLUCO

III III

-150

Q. LU Q

-200

-250

EX-4 January 31,1996 -50

-100

-150

-200

-250

EX-7 February 2,1996

10 100 1,000 10,000 50,000 10 100 1,000

CHLORIDE CONCENTRATION, IN MILLIGRAMS PER LITER

10,000 5C,000

LU

LUCO

-50

-100

g LUCO

III IIILL

-150

Q. IllQ

-200

-250

EX-9 February 12,1996

10 100 1,000 10,000 50,000

CHLORIDE CONCENTRATION, IN MILLIGRAMS PER LITER

Figure B6. Vertical chloride-concentration profiles of monitoring wells, Guam, 1996.

42

Table Bl. Monthly ground-water pumpage by sub-basin, Guam, 1996[Sub-basin designations are from Camp, Dresser and McKee, Inc. (1982). Data are from the;uam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy. ralues are rounded to million gallons; pumpage from wells D-22A, F-17, F-18, IE-2, NCS-9, and r-12 are not included in sub-basin pumpage totals.]

Month Agafo Gumas Agana Andersen Finegayan Mangilao Yigo SouthernSub-basin

JANFEEMARAPRMAYJUNJULAUGSEPOCTNOVDEC

34.27,31.27,26,24,29,2726,25,26,33,

Total 342

.3

.3

.6

.6

.2

.7

.7

.4

.9

.7

.5

.9

.0

Sub-basin

381,325,388,338,353,318,350,333,338,303,336,386

4,156

.1

.9

.4

.3

.7

.9

.9

.4

.8

.7

.4

.5

.0

Sub-basin

17.23.27,24,26,23,26,29,20,21.22,40,

302

.1

.6

.3

.1

.2

.5

.1

.2

.4

.6

.7

.8

.6

Sub-basin

150,143,151127132117143124107109112143

1,564

.9

.0

.1

.5

.9

.5

.7

.0

.9

.5

.2

.9

.0

Sub-basin

78.63.71.62.70.55.73.64.44.59.53.65.

762.

.0

.8

.9

.9

.6

.3

.7

.1

.7

.0

.0

.1

.1

Sub-basin

408.393.417.384.344.343.326.329,296,318,318,417,

4,297,

.2

.7

.2

.9

.1

.8

.2

.0

.7

.5

.2

.0

.6

Guam

12,11,13,1219,17,12.87

1098

144

.9

.2

.5

.5

.5

.1

.8

.8

.5

.5

.9

.7

.9

43

Table B2. Monthly ground-water pumpage of production wells, Guam, 1996[Values are rounded to million gallons; blank entries indicate no data; Mgal, million gallons; Mgal/d, million gallons per day; data from Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, U.S. Navy.]

Well

A-lA- 2A- 3A- 4A- 5A- 6A- 7A- 8A- 9A-10A-12A-13A-14A-15A-17A-l 8A-19A-21A-23A-25A-26A-28A-29A-30A-31A-32AG-1AG-2BCCBPM(AF)CCP-1CCP-2CCP-3CCP-4CCP-5CCP-6CIR-1,2D-lD-2D-3D-4D-5D-6D-7D-8D-9D-10D-llD-12D-13D-14D-15D-16D-17D-18D-19D-20D-21D-22AD-24EX- 5 AEX- 11F-lF-2F-3F-4F-5F-6F-7F-8F-9F-10

JAN

11.712.210.911.912.513.89.9

11.512.211.79.1

12.011.512.711.76.19.3

10.314.711.62.6

12.216.820.517.04.86.55.20.00.01.00.71.50.90.40.32.9

11.39.97.8

11.27.76.79.79.49.29.50.38.07.49.09.64.59.49.48.97.07.00.07.2

10.78.46.44.57.06.87.68.03.86.47.05.7

FEE

9.710.59.2

10.010.411.68.49.4

10.29.97.89.6

10.110.610.09.23.38.8

12.61.32.29.0

14.033.09.64.15.53.10.00.01.00.61.51.10.00.22.69.78.56.39.76.55.48.17.97.68.20.06.74.87.88.18.18.06.68.67.6

19.80.06.09.47.05.03.65.85.66.36.6

10.45.45.86.0

MAR

11.011.610.510.711.913.39.3

10.611.711.58.9

12.211.712.212.010.48.4

10.014.312.12.5

12.516.638.612.74.66.33.30.00.01.10.81.61.10.21.13.5

10.19.87.4

11.17.7

10.99.38.98.79.30.07.67.88.99.29.39.29.28.98.1

11.70.06.7

10.88.15.84.16.76.47.17.57.86.16.55.6

APR

9.79.89.43.0

10.712.07.99.5

10.310.47.68.7

10.610.810.59.48.38.9

12.813.62.3

11.213.027.311.78.85.33.90.00.00.81.01.30.90.20.92.6

10.18.86.9

11.26.9

10.08.48.07.78.40.06.97.18.18.37.07.58.48.07.16.90.06.09.97.75.03.35.95.76.36.86.95.65.82.4

MAY

10.311.010.44.9

11.813.37.9

10.311.711.28.3

11.810.312.19.4

10.58.19.9

14.112.32.2

11.715.131.812.94.65.93.40.00.11.11.41.81.30.61.03.5

10.89.67.21.17.0

10.79.38.98.69.4

11.77.67.88.99.19.29.38.98.88.07.80.06.6

10.58.15.53.96.66.27.07.67.76.05.75.9

JUN

8.49.28.9

11.710.111.46.58.77.9

10.06.7

10.55.6

10.39.18.87.68.7

11.921.42.5

10.012.224.011.04.05.04.40.00.61.31.51.81.30.70.03.58.58.16.70.95.99.17.97.47.27.95.16.46.57.57.37.67.77.77.67.97.83.25.58.86.84.53.25.45.25.86.86.44.84.44.2

JUL

10.011.010.70.0

12.313.87.89.8

11.912.28.1

12.715.611.611.410.79.5

10.714.84.22.7

10.914.832.313.54.85.95.10.0

1.11.21.41.00.70.03.0

10.59.76.61.04.3

10.59.58.98.09.69.27.88.18.96.69.39.39.59.29.59.40.06.6

10.68.15.52.46.56.36.9

13.87.15.65.37.8

AUG

8.610.910.05.1

11.313.47.1

10.06.4

10.68.28.3

11.016.311.310.09.1

10.213.813.22.6

11.46.2

32.212.54.45.85.20.0

1.00.61.51.10.30.03.58.79.37.52.1

11.09.98.98.48.09.08.77.47.68.46.58.94.78.38.78.88.90.06.2

10.07.35.64.06.46.26.77.37.65.66.37.3

SEP

8.99.78.95.19.9

24.06.28.3

13.010.37.99.8

10.710.610.99.79.09.0

12.512.82.4

10.213.429.511.14.15.34.60.0

1.00.41.10.80.70.02.89.59.76.91.57.59.57.97.57.58.99.06.56.77.68.68.28.40.07.88.18.1

16.55.69.56.85.13.45.75.36.06.46.74.95.66.4

OCT

8.99.79.05.19.8

14.06.38.3

13.010.47.99.8

10.710.711.09.79.09.0

12.512.82.4

10.213.430.511. 14.15.34.70.0

1.10.61.61.10.70.52.8

10.710.67.66.68.96.97.97.67.89.09.66.57.38.59.78.89.50.08.08.59.50.05.89.96.95.53.55.95.56.06.67.65.76.57.5

NOV

8.99.8

10.05.1

11.013.56.99.9

11.610.38.18.7

10.812.510.99.68.99.0

13.313.62.5

11.311.631.711.64.26.05.00.0

0.70.61.20.90.10.02.69.6

10.37.54.69.97.68.57.97.58.89.56.67.18.68.68.96.60.08.18.58.90.06.0

10.07.05.53.96.05.86.06.97.55.66.37.3

DEC

16.818.512.23.3

15.212.710.414.04.13.7

15.519.113.612.713.93.50.7

14.519.616.33.5

15.525.349.118.16.36.56.50.0

0.90.11.00.80.50.03.08.64.9

16.10.53.98.9

13.212.67.47.88.5

11.75.6

11.312.512.413.625.97.4

12.810.90.08.56.8

11.40.03.58.45.69.79.59.50.04.98.0

Total(Mgal)

122.9133.8120.276.1

136.8166.894.3

120.2124.1122.2104.0133.2132.1143.1132.0107.591.2

118.9166.9145.030.3

136.0172.3380.6152.958.769.054.60.00.8

12.29.3

17.412.15.14.1

36.1118.1109.194.561.487.0

106.0108.5103.495.4

105.771.589.783.9

103.4104.2102.3103.093.9

100.0101.9116.819.776.6116.793.659.543.376.370.581.293.789.161.770.174.1

Mean(Mgal/d)

0.30.40.30.20.40.50.30.30.30.30.30.40.40.40.40.30.20.30.50.40.10.40.51.00.40.20.20.10.00.00.00.00.00.00.00.00.10.30.30.30.20.20.30.30.30.30.30.20.20.20.30.30.30.30.30.30.30.30.10.20.30.30.20.10.20.20.20.30.20.20.20.2

44

Table B2 . Monthly ground-water pumpage of production wells, Guam, 1996--Continued

F-llF-12F-13F-15F-16F-17F-18

FFH-3FFH-4FFH-5AFFH-7FFH-8FMGH-501GOR-1H-lHGC-2HGC-3HRP-1HRP-2IE-1IE-2M-lM-2M-3M-4M-5M-6M-7M-8M-9M-12M-14M-15

M-16BM-17AM-17BM-20AMCR-1MGC-1MGC-2MGC-3MGC-4MHR-1MJ-1MJ-2MW-1MW-2MW-3MW-5MW-6MW-7MW-8MW-9

NASNCS-2NCS(B)-3NCS-5NCS-6NCS-7NCS(B)-8NCS-9NCS-ANCS-BNRMC-1NRMC-2NRMC-3PBI-1PIC-1RCA-1TGC-1TGR-1TGR-2TGR-3TGR-4TGR-5TGR-6TMTY-lY-2

8.66.4

14.819.20.00.00.07.87.80.05.97.82.47.50.6

12.419.92.73.80.70.00.04.98.8

11.17.37.89.68.3

17.37.64.9

11.34.05.8

16.31.40.00.01.10.01.74.00.50.00.05.84.85.54.5

17.610.117.917.29.17.33.84.20.6

12.010.1

0.00.06.7

12.80.06.20.74.30.00.00.80.01.30.31.40.30.06.47.8

7.15.3

12.416.10.00.00.07.37.30.05.57.32.16.10.7

10.816.72.05.50.90.00.04.07.45.16.06.58.12.7

17.96.44.15.16.94.7

16.913.01.80.01.90.01.02.40.40.00.06.14.46.65.6

15.910.216.615.70.06.03.54.09.3

11.09.70.00.04.5

12.23.35.30.93.50.00.01.00.00.90.30.70.30.05.56.7

8.16.1

13.518.30.00.00.07.87.80.05.97.82.36.90.2

12.818.14.05.00.80.00.03.98.58.87.07.59.30.08.47.52.8

11.68.55.68.8

12.00.00.04.40.03.46.30.00.00.04.45.33.76.4

16.512.118.817.80.05.43.24.34.8

12.010.45.60.05.1

11.57.94.31.13.80.00.00.40.01.70.21.40.20.06.37.7

7.25.10.0

16.29.5

11.75.77.67.60.05.77.62.45.90.19.3

15.03.55.40.60.00.06.27.86.96.66.88.30.06.86.84.9

10.47.74.95.2

10.75.20.02.60.91.24.70.00.00.06.06.30.05.1

16.611.218.117.70.06.83.24.14.69.26.58.10.06.7

10.87.54.10.93.60.00.00.30.01.70.41.70.40.05.77.0

7.95.90.0

17.30.0

12.610.27.87.80.05.97.82.76.60.2

12.712.84.13.90.60.00.05.98.38.75.9

11.19.27.87.87.45.3

11.38.15.12.5

11.113.20.02.82.32.65.60.03.80.0

0.06.63.51.83.19.80.0

10.50.07.6

10.67.36.31.64.20.20.01.50.01.80.70.00.60.06.36.4

6.44.20.0

14.90.59.6

10.67.67.60.05.77.62.76.10.2

10.811.83.54.00.70.00.04.56.96.75.62.17.60.06.56.14.59.21.84.20.09.29.80.01.21.01.04.70.10.60.04.54.5

10.47.2

14.610.517.816.60.00.03.90.06.4

11.10.07.50.07.19.57.13.71.24.20.10.00.50.03.00.51.60.50.05.36.5

7.75.94.2

12.60.8

13.68.47.87.80.05.97.82.87.30.7

13.216.81.92.80.30.00.05.17.5

18.67.07.59.30.07.77.55.5

11.29.94.96.5

11.212.80.01.51.41.03.50.00.90.0

0.00.04.00.06.9

11.40.06.80.07.1

10.37.34.21.04.80.00.00.30.01.20.11.10.10.06.27.7

7.55.39.80.00.87.80.07.87.80.05.97.82.86.80.1

12.416.10.20.80.40.00.05.08.5

17.96.36.99.40.07.27.05.4

10.59.14.7

10.410.012.30.00.10.00.00.30.00.00.0

0.09.13.90.01.7

11.40.03.92.93.16.97.36.01.54.80.00.00.20.00.20.10.20.10.06.26.8

3.84.98.60.00.79.4

11.17.67.60.05.77.63.36.30.6

11.115.31.72.30.50.00.04.57.17.35.96.46.90.06.66.34.49.68.50.09.49.1

12.30.00.00.00.00.00.00.00.0

0.08.63.40.06.10.86.66.15.35.30.07.17.31.25.30.00.00.00.00.00.00.00.00.04.31.2

4.65.79.60.00.7

10.312.9

2.86.31.0

11.315.30.52.30.60.00.05.58.08.56.67.67.35.37.67.55.4

10.39.64.4

10.39.7

12.50.01.01.11.00.90.00.00.0

0.09.02.90.24.00.08.9

10.95.12.70.87.27.11.65.10.00.00.20.00.50.20.10.20.04.31.4

7.55.59.80.00.89.9

12.07.67.60.05.77.63.16.40.5

11.515.1

0.50.20.40.00.05.38.3

10.96.36.89.64.97.97.05.4

10.89.70.0

10.39.9

12.40.00.10.10.10.10.00.00.0

0.08.00.00.50.80.08.2

10.79.00.78.27.15.21.14.10.00.00.03.20.00.20.00.00.05.72.6

6.79.59.7

15.50.9

21.60.0

3.19.50.0

18.318.92.00.10.50.00.05.59.66.79.69.0

12.45.38.99.05.24.1

11.70.00.0

14.116.20.01.30.91.01.00.00.00.0

0.09.10.00.03.30.08.88.68.73.90.07.57.31.44.10.00.00.60.50.90.20.00.20.05.6

12.7

83.069.792.4

130.214.6

106.570.876.676.60.0

57.876.632.681.85.0

146.5191.726.736.27.20.00.0

60.396.5

117.180.185.9

106.834.2

110.686.357.8

115.495.544.196.3

121.3108.5

0.018.07.7

14.133.61.15.20.0

26.825.426.228.881.254.089.385.09.1

76.035.419.351.788.669.278.631.060.293.676.667.014.251.90.50.05.83.8

13.23.18.22.80.0

67.974.5

0.20.20.30.40.00.30.20.20.20.00.20.20.10.20.00.40.50.10.10.00.00.00.20.30.30.20.20.30.10.30.20.20.30.30.10.30.30.30.00.00.00.00.10.00.00.00.10.10.10.10.20.10.20.20.00.20.10.10.10.20.20.20.10.20.30.20.20.00.10.00.00.00.00.00.00.00.00.00.20.2

45

Table B2. Monthly ground-water pumpage of production wells, Guam, 1996--Continued

Y-3 2.8 9.1 6.2 5.7 6.1 4.3 5.0 5.0 10.0 10.3 9.6 27.7 101.8 0.3Y-4A 9.0 8.1 8.6 8.3 9.0 7.6 8.9 8.9 7.5 0.9 1.5 14.0 92.3 0.3Y-5 7.1 6.1 7.0 6.4 7.0 5.9 7.0 6.8 6.1 7.6 7.0 7.0 80.9 0.2Y-6(506) 7.9 6.8 7.7 6.8 6.9 4.7 7.1 7.6 5.3 5.4 6.9 9.6 82.6 0.2Y-7 12.3 10.7 12.1 11.0 11.7 9.6 11.3 11.7 9.9 10.3 10.7 14.2 135.4 0.4Y-9 2.1 1.8 2.0 1.9 2.0 1.7 2.0 2.0 1.7 2.0 2.3 1.9 23.2 0.1Y-12 0.0 0.0 2.9 10.9 14.6 12.8 15.8 16.6 11.4 12.3 13.6 0.0 110.8 0.3Y-15 17.1 23.6 27.3 24.1 26.0 22.9 26.1 29.2 20.4 21.6 22.7

46

Table B3. Daily mean ground-water levels at monitoring sites, Guam, 1996[Values are in feet above mean sea level; , no data or no statistic; U.S. Geological Survey provisionaldata.]

DAY JAN

Well A-16

FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

1 3.722 3.683 3.664 3.645 3.63

6 3.657 3.668 3.669 3.66

10 3.66

11 3.6612 3.6913 3.7014 3.8115 3.82

16 3.8117 3.8518 3.8519 3.8320 3.83

21 3.8522 4.01.23 4.1224 25

26 27 28

2930

31 3.91

MEAN MAX MIN

3.893.883.923.933.99

4.034.034.014.004.03

4.033.994.014.054.04

4.023.993.983.983.99

4.004.044.054.034.00

3.983.983.953.94

3.994.053.88

3.933.923.923.923.92

3.933.943.943.943.94

3.923.913.893.843.84

3.843.883.893.883.91

3.913.923.933.923.92

3.923.933.933.933.933.93

3.913.943.84

3.933.943.943.943.94

3.943.943.943.933.92

3.903.893.843.833.88

3.883.873.863.853.84

3.843.843.843.863.85

3.873.883.883.87

___

3.883.873.863.843.83

3.813.793.813.823.81

3.803.783.773.763.78

3.823.843.853.873.91

3.893.823.793.773.75

3.723.693.693.713.743.75

3.803.913.69

3.773.793.813.843.84

3.853.853.863.853.84

3.833.853.843.853.87

3.853.833.843.843.84

3.813.803.793.783.76

3.713.713.713.723.74

3.813.873.71

3.773.803.843.893.92

3.933.943.943.943.94

3.953.943.943.943.90

3.863.903.923.933.93

3.933.933.943.953.95

3.984.054.124.414.494.61

3.984.613.77

4.604.554.474.344.23

4.174.154.154.144.16

4.174.194.204.184.15

4.144.134.114.104.14

4.184.164.154.134.12

4.11

___

___

4.094.084.084.09

4.114.194.484.534.46

4.444.414.414.404.31

4.314.344.504.454.21

___

4.144.114.104.144.12

4.114.104.094.094.06

4.044.124.154.114.08

4.044.024.004.014.04

4.064.054.044.084.10

4.104.094.074.054.034.03

4.084.154.00

4.024.024.014.024.05

4.114.144.274.494.48

4.524.494.274.154.12

4.104.074.034.034.01

4.004.014.024.064.11

4.014.104.104.094.05

4.134.524.00

4.023.993.933.953.95

3.953.883.843.833.82

3.703.653.603.603.48

3.473.473.533.533.53

3.583.543.473.553.55

3.553.573.723.833.863.84

3.704.023.47

47

Table B3. Daily mean ground-water levels at monitoring sites, Guam, 1996 Continued

Well A-20

DAY JAN FEE MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

1 44.23 43.78 43.69 40.73 50.27 50.51 53.752 44.16 43.79 43.61 40.64 50.26 50.50 53.873 44.08 43.76 43.54 40.53 50.23 50.48 53.934 44.00 43.73 43.46 40.44 50.21 50.47 53.985 43.91 43.69 43.38 40.50 50.17 50.43 54.00

6 43.80 43.63 43.28 40.56 50.11 50.45 53.957 43.68 43.58 43.18 40.59 50.06 50.58 53.898 43.60 43.54 43.08 40.58 50.02 50.76 53.879 43.51 43.50 42.99 40.55 50.02 50.91 53.86

10 43.41 43.51 42.89 40.49 50.03 51.21 53.86

11 43.30 43.66 42.78 40.43 50.01 51.43 53.8612 43.20 43.82 42.68 40.38 50.03 51.59 53.8613 43.08 43.93 42.59 40.32 50.21 51.64 53.8614 43.00 44.02 42.48 40.26 50.35 51.66 53.8615 42.98 44.11 42.39 50.43 51.72 53.8616 42.95 44.17 42.29 50.46 51.76 53.8617 42.94 44.21 42.20 50.49 51.78 53.8618 42.94 44.22 42.11 50.52 51.77 53.8619 42.94 44.24 42.01 50.53 51.85 53.8620 42.93 44.23 41.89 50.53 51.97 53.86

21 42.88 44.22 41.79 50.50 52.09 53.8622 42.93 44.17 41.69 50.47 52.28 53.8623 43.10 44.13 41.59 50.43 52.48 53.8624 43.25 44.07 41.49 50.46 52.65 53.8625 43.38 44.02 41.40 50.50 52.87 53.86

26 43.49 43.97 41.30 50.52 53.12 53.8627 43.55 43.90 41.19 50.54 53.32 53.8628 43.62 43.83 41.09 50.55 53.44 53.8629 43.69 43.76 41.00 50.54 53.49 53.8630 43.75 40.91 50.50 53.59 53.8631 43.77 40.82 50.49 53.86

MEAN 43.42 43.90 42.28 50.34 51.76 53.87MAX 44.23 44.24 43.69 50.55 53.59 54.00MIN 42.88 43.50 40.82 50.01 50.43 53.75

48


ACEORP Tunnel

DAY JAN FEE MAR APR MAY JUN JUL AUG

12345

6789

10

1112131415

1617181920

2122232425

262728293031

MEANMAXMIN

2.652.592.562.542.55

2.572.592.592.582.58

2.592.652.732.802.76

2.772.792.772.752.76

2.832.962.942.892.82

2.812.822.792.772.772.75

2.722.962.54

22222

22222

22222

22222

22222

2222

222

.74

.76

.80

.84

.98

.97

.93

.90

.95

.98

.93

.91

.98

.97

.94

.91

.89

.88

.89

.91

.92

.99

.98

.94

.93

.91

.90

.86

.83___

.91

.99

.74

2.812.812.822.812.83

2.852.882.882.892.87

2.832.812.802.762.78

2.812.822.792.812.82

2.832.852.842.832.83

2.852.862.862.862.872.86

2.832.892.76

2.862.882.912.902.87

2.882.892.862.852.84

2.822.822.782.792.85

2.832.822.812.792.80

2.792.812.822.822.83

2.832.822.832.822.82

2.832.912.78

2.2.2.2.2.

2.2.2.2.2.

2.2.2.2,2,

2,2,22,2

22222

222222

222

8281817979

.77,76.78.79.78

.76

.73

.71

.71

.78

.82

.83

.83

.87

.90

.84

.79

.76

.73

.70

.66

.64

.65

.68

.71

.73

.77

.90

.64

2.762.802.832.842.84

2.842.852.842.832.82

2.822.832.832.832.84

2.832.822.822.832.82

2.782.772.752.722.69

2.682.672.672.682.67

2.792.852.67

2.2.2.2.2.

2.2.2.2.2.

2.2,2,2.2,

2,2,222

22222

222222

222

6768707379

,85,80.74.72.70

.66

.64

.64

.66

.64

.61

.61

.60

.59

.55

.51

.52

.54

.59

.63

.61

.60

.64

.68

.68

.66

.65

.85

.51

2.672.692.682.632.61

2.602.632.642.622.62

2.642.682.782.923.00

3.113.203.143.083.10

2.982.963.273.203.06

2.96

SEP OCT NOV DEC

49


Well BPM-1


1 2.662 2.633 2.604 2.595 2.60

6 2.617 2.628 2.639 2.64

10 2.65

11 2.6512 2.6413 2.6314 2.6515 2.68

16 2.7217 2.7618 2.8119 2.8320 2.85

21 2.8722 3.0723 3.1824 3.1525 3.09

26 3.0627 3.0428 3.0029 2.9830 2.9731 2.95

MEAN 2.80MAX 3.18MIN 2.59

2.932.932.942.962.97

2.993.013.002.992.99

3.013.013.013.033.04

3.043.043.043.053.04

3.043.063.053.033.01

3.003.002.982.95 ___

3.003.062.93

2.942.932.932.922.91

2.912.912.912.902.89

2.892.892.882.862.85

2.862.892.902.892.91

2.942.972.972.962.95

2.952.952.942.952.962.96

2.922.972.85

2.952.972.992.972.92

2.932.942.942.932.93

2.932.912.892.862.83

2.842.872.892.902.90

2.902.912.912.922.91

2.973.043.043.043.05

2.933.052.83

3.053.053.043.043.04

3.023.003.013.023.01

3.002.992.962.963.00

3.033.043.053.053.05

3.022.992.982.972.95

2.912.892.902.932.973.00

3.003.052.89

3.023.033.053.063.06

3.063.063.083.073.07

3.063.083.083.093.09

3.093.073.073.083.07

3.053.023.012.972.95

2.942.942.952.962.96

3.043.092.94

2.983.013.053.083.11

3.133.143.153.163.15

3.143.133.113.103.07

3.063.073.093.103.12

3.113.093.083.103.13

3.153.183.243.383.433.46

3.143.462.98

3.483.453.443.383.32

3.293.283.263.233.24

3.243.313.373.343.31

3.303.283.273.263.26

3.333.353.343.323.29

3.273.253.253.253.243.23

3.303.483.23

3.223.193.223.263.27

3.273.263.273.263.24

3.223.223.213.193.16

3.153.283.363.373.36

3.383.433.443.443.42

3.403.403.503.473.42

3.313.503.15

3.343.273.223.193.17

3.153.143.133.113.09

3.093.133.193.203.19

3.163.153.143.143.18

3.233.213.163.093.09

3.193.183.173.173.153.12

3.173.343.09

3.113.113.113.133.17

3.183.243.683.883.74

3.523.413.283.123.13

3.083.063.043.053.07

3.083.123.113.063.09

3.233.263.163.083.03

3.213.883.03

3.123.133.083.043.03

3.033.022.992.952.91

2.882.882.872.862.82

2.782.742.702.682.69

2.692.682.702.792.83

2.832.852.852.862.852.81

2.873.132.68

50


Well EX-7

AY JAN

1 3.242 3.193 3.154 3.125 3.08

6 3.077 3.078 3.069 3.07

10 3.07

11 3.0712 3.0813 3.0714 3.0715 3.07

16 3.0717 3.0718 3.1719 3.2620 3.27

21 3.3022 3.3423 3.3724 3.3625 3.32

26 3.3227 3.3428 3.3329 3.3130 3.3031 3.27


FEE

3.26

3.403.443.56

3.583.553.533.563.58

3.563.563.623.613.58

3.563.543.543.563.57

3.593.653.663.633.60

3.593.583.553.52

_ _

MAR

3.513.503.513.513.52

3.543.553.553.553.54

3.513.493.483.453.46

3.473.483.483.483.49

3.503.513.513.503.50

3.513.513.513.513.523.51

3.513.553.45

APR

3.513.533.553.523.49

3.513.523.503.493.48

3.473.463.443.443.47

3.463.453.443.433.43

3.423.433.443.443.45

3.463.453.463.453.45

3.473.553.42

MAY

3.453.453.453.433.43

3.413.403.423.423.41

3.393.383.373.373.42

3.473.473.473.533.56

3.513.453.423.393.36

3.323.303.303.323.353.37

3.413.563.30

JUN

3.403.433.463.483.48

3.473.483.483.473.47

3.473.483.483.483.49

3.483.473.463.473.46

3.453.433.413.393.36

3.343.333.343.353.37

3.443.493.33

JUL

3.413.453.483.513.54

3.563.583.603.603.61

3.603.583.563.543.51

3.493.513.523.533.55

3.543.533.543.563.60

3.683.703.773.914.014.07

3.604.073.41

AUG

4.074.023.943.873.82

3.803.783.783.783.86

3.883.863.883.863.83

3.813.793.773.773.76

3.773.743.743.723.71

3.733.743.723.753.773.76

3.814.073.71

SEP

3.743.733.753.773.75

3.733.753.793.793.76

3.733.733.733.733.74

3.813.953.973.994.05

4.074.023.943.943.93

3.923.923.923.913.87

3.854.073.73

OCT

3.793.743.723.733.72

3.713.683.653.633.61

3.633.653.633.633.62

3.603.583.563.563.60

3.633.633.643.673.69

3.703.663.643.623.613.60

3.653.793.56

NOV

3.563.573.563.573.57

3.613.703.833.884.05

4.114.103.973.863.75

3.733.653.613.573.55

3.523.543.553.593.61

3.633.603.573.543.54

3.684.113.52

DEC

3.533.513.523.573.55

3.513.463.443.443.42

3.393.383.353.293.23

3.183.143.123.133.11

3.103.143.19

51


Well EX-10

DAY JAN

1 2.752 2.683 2.634 2.605 2.61

6 2.617 2.628 2.619 2.62

10 2.62

11 12 13 14 15

1617 1819 20

21 22 23 2425

26 27 28 29 3031

MEAN MAX MIN

FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

3.013.033.033.02

3.013.043.063.063.10

3.093.103.123.143.14

___

______

3.183.183.183.183.18

3.163.133.153.153.16

3.133.113.123.133.21

3.283.303.273.343.38

3.323.263.213.183.15

3.113.103.123.163.213.22

3.193.383.10

3.273.213.263.253.27

3.303.313.243.313.25

3.173.163.243.243.17

3.123.113.153.193.10

3.233.233.193.153.12

3.113.123.133.133.15

___

3.203.313.10

3.193.233.253.273.31

3.333.393.393.373.38

3.403.383.293.293.25

3.213.243.243.243.27

3.263.243.233.233.26

3.283.293.373.423.533.56

3.313.563.19

3.633.503.373.273.20

3.193.163.153.123.19

3.213.183.193.203.12

3.113.093.083.083.07

3.063.033.053.033.03

3.043.043.043.073.083.07

3.153.633.03

3.043.033.043.083.09

3.063.083.093.093.06

3.073.103.103.123.15

3.223.253.263.293.33

3.383.333.213.203.20

3.183.163.153.133.07

3.153.383.03

2.992.942.942.962.94

2.942.882.822.802.80

2.822.842.802.822.83

2.812.812.802.792.84

2.842.892.872.922.96

2.932.882.882.892.872.86

2.872.992.79

2.812.822.812.822.87

2.912.953.033.093.29

3.433.403.243.072.96

2.932.832.762.732.71

2.682.712.762.772.79

2.812.822.802.742.75

2.903.432.68

2.682.602.562.682.70

2.672.622.562.572.57

2.542.542.542.492.45

2.412.372.342.352.33

2.312.332.372.422.42

2.422.472.672.662.702.61

2.512.702.31

52


Well M-10A


1 2.692 2.633 2.584 2.555 2.54

6 2.557 2.568 2.569 2.57

10 2.57

11 2.5812 2.6513 2.6514 2.7015 2.69

16 2.7017 2.7118 2.7219 2.7220 2.73

21 2.7522 2.8023 2.8524 2.8425 2.79

26 2.7927 2.8028 2.7829 2.7630 2.7631 2.75


2.742.742.772.802.91

2.942.902.892.912.94

2.932.912.962.952.93

2.912.902.902.902.92

2.932.962.972.942.93

2.912.902.872.84 -

2.902.972.74

2.822.812.822.822.83

2.852.872.872.872.86

2.832.802.792.762.77

2.792.812.802.802.82

2.832.852.852.842.83

2.842.852.852.862.862.86

2.832.872.76

2.862.872.902.882.85

2.872.882.872.852.84

2.832.822.792.792.84

2.872.902.902.892 Q Q .DO

2.882.892.902.902.91

2.922.912.922.922.92

2.872.922.79

2.922.922.922.902.90

2.882.872.882.882.87

2.862.842.832.832.88

2.932.952.952.993.02

2.982.922.882.852.83

2.812.792.802.822.832.84

2.883.022.79

2.862.902.932.952.95

2.952.962.962.952.95

2.952.962.962.962.97

2.962.952.952.962.95

2.932.912.892.872.84

2.832.832.832.842.86

2.922.972.83

2.892.932.972.993.03

3.053.073.103.093.08

3.083.073.053.043.01

2.993.003.023.043.04

3.043.033.043.073.11

3.173.243.343.583.693.73

3.123.732.89

3.733.643.543.423.34

3.313.273.263.243.31

3.333.303.313.303.25

3.233.213.193.183.18

3.203.183.183.163.15

3.143.103.063.083.083.07

3.263.733.06

3.053.033.063.113.11

3.093.093.103.103.08

3.073.093.103.113.14

3.203.313.353.383.40

3.423.383.323.293.26

3.233.233.243.223.17

3.193.423.03

3.093.022.983.012.98

2.952.932.902.902.88

2.892.942.942.942.92

2.902.872.862.862.90

2.922.922.932.952.97

2.972.952.942.922.902.90

2.933.092.86

2.872.872.872.892.94

2.963.033.183.263.43

3.553.493.373.253.15

3.072.972.892.842.79

2.772.782.812.852.89

2.932.922.902.872.83 -

3.013.552.77

2.782.752.732.752.76

2.752.712.662.662.65

2.622.602.592.562.49

2.442.392.382.382.38

2.372.392.442.502.50

2.512.562.712.732.762.72

2.592.782.37

53


Well M-ll


1 3.432 3.393 3.344 3.325 3.31

6 3.327 3.328 3.329 3.32

10 3.32

11 3.3212 3.3313 3.3314 3.3515 3.34

16 3.3517 3.3718 3.3919 3.4320 3.50

21 3.5322 3.6123 3.7924 3.9625 3.92

26 3.8627 3.8028 3.7729 3.7030 3.6531 3.62


3.613.593.603.613.68

3.723.693.653.643.69

3.863.974.024.013.92

3.903.903.893.873.85

3.833.843.853.803.78

3.763.733.673.63 ___

3.784.023.59

3.613.613.613.613.61

3.613.613.613.613.61

3.603.573.543.523.50

3.513.533.523.523.53

3.533.563.593.683.73

3.723.683.693.703.743.73

3.613.743.50

3.713.653.643.623.61

3.613.613.613.613.61

3.613.603.593.583.61

3.593.573.573.573.56

3.563.563.563.573.57

3.573.573.573.573.57___

3.593.713.56

3.573.573.563.553.54

3.533.493.513.513.49

3.483.483.463.453.48

3.533.563.563.583.60

3.583.563.523.483.46

3.433.373.373.373.433.47

3.503.603.37

3.483.523.563.573.57

3.573.573.573.573.57

3.573.573.573.573.57

3.573.573.563.573.57

3.553.533.513.483.46

3.433.393.393.403.42

3.533.573.39

3.453.513.553.583.59

3.613.643.663.663.67

3.683.683.663.663.63

3.603.613.653.733.83

3.883.873.863.863.88

3.984.214.626.146.475.98

3.986.473.45

5.805.295.335.214.82

4.584.494.444.404.47

4.434.334.294.274.23

4.174.144.114.073.99

4.114.434.574.454.31

4.234.204.374.464.404.34

4.485.803.99

4.354.314.254.234.18

4.184.154.114.144.12

4.154.154.104.044.02

4.064.525.255.115.05

4.864.534.504.374.16

4.094.174.524.904.77

4.385.254.02

4.534.344.224.184.13

4.053.973.923.883.86

3.913.994.464.674.41

4.084.114.063.993.96

3.953.923.913.913.92

3.913.883.843.803.663.64

4.034.673.64

3.573.553.513.533.59

3.703.874.064.275.03

5.115.004.584.414.11

4.124.053.923.843.78

3.723.693.793.974.20

4.504.664.434.244.08

4.105.113.51

3.963.863.783.783.77

3.693.633.583.543.52

3.463.443.423.413.36

3.303.223.213.213.21

3.193.203.213.223.26

3.313.363.543.633.713.67

3.473.963.19

54

Table B4. Monthly ground-water levels at monitoring sites, Guam, 1996[Values are in feet above mean sea level; , no data; Father Duenas site has unknown amountof oil floating on water; data from Guam Environmental Protection Agency.]

Date Agana Agana EX-1 EX-4 EX-6 EX-9 Father GHURA- Harmon 147 Spring Duenas Dededo 107

05/03/96 7.48 6.30 5.72 3.45 3.34 5.06 2.25 1.1606/06/96 6.76 6.60 5.66 3.49 3.44 7.47 2.27 07/03/96 6.82 6.52 5.51 3.55 3.51 6.09 2.31 08/06/96 7.95 6.80 8.33 6.26 3.65 3.45 7.62 2.36 09/11/96 7.08 7.08 7.74 6.75 3.66 3.56 8.32 2.43 10/04/96 7.62 7.52 3.55 3.40 8.83 2.28 11/06/96 8.79 7.78 8.40 6.75 3.52 3.46 8.65 2.25 12/06/96 8.99 8.30 9.13 6.72 3.48 3.44 8.45 1.98

NOTE: Monthly ground-water level data are not available for the period January through April, 1996.

55

Table B5. Chloride concentration of water from production wells, Guam, 1996 [Values are in milligram per liter; blank entries indicate no data or no statistic; C1-, chloride concentration; data from Guam Environmental Protection Agency, Guam Waterworks Authority.]

Well Quarter Quarter Quarter Quarter Number 1 2 3 4 of

Analyses

Maximum Minimum Mean Cl- Cl- Cl-

A-lA-2A-3A-4A- 5A-6A-7A-8A-9A-10A-12A- 13A-14A-15A-17A-l 8A-19A-21A-2 3A-2 5A-2 6A-2 8A-2 9A-30A-31A-32AG-1AG-2BCC

BPM(AF)CCP-1CCP-2CCP-3CCP-4CCP-5CCP-6CIR-1,2D-lD-2D-3D-4D-5D-6D-7D-8D-9D-10D-llD-12D-13D-14D-15D-l 6D-17D-18D-19D-20D-21D-22AD-24EX-5AEX-11F-lF-2F-3F-4F-5F-6F-7F-8F-9

1820204822302822

19832416

464340164512450382436285278

172507832265420

256680908536

322

70683644845864

27617046

2039680

118102264118746662

523838

1641261102581263161002862

2228226024323024

19033022

436314150470422348416285282

16858

15438265440

70724242646454

260170408018

44982

112104250110686078

564840

1601241062601223261062472

1816184426202220

14624622

316324148472420388264387892

16872

12030221824

68645044445488

194228213214172326118869622

1221186480

106624636

16692

10870

1303641122074

3430145622342818

19830222

504320166468452370448305288

184385430226026

70723642606066

266176527230

51086

1161142289270709032643842

1401241042681283201082868

44444444444444444444444444440111111104444444444344444444442444444444444

3430226026343024

19833022

504340166512452388448387892

18472

15438266040

70725044846488

2762282132141725101181181142641221187090

106644842

1661261102681303641122874

1816144422202218

14624616

316314148468420348264285278

168385430221820

68643642445454

194170407218

326808696229268606232523836

14092

10470

1223161002062

2324195224292721

18330021

430324157480436372391315985

17355

10133244728

70694143635968

24918688

12260

42092

10810419111083657869594339

1571161072141263311062569

56

Table B5. Chloride concentration of water from production wells, Guam, 1996--Continued

F-10F-llF-12F-13F-15F-16F-17F-18

FFH-3FFH-4FFH-5AFFH-7FFH-8

FMGH-501GOR-1H-l

HGC-2HGC-3HRP-1HRP-2IE-1IE-2M-lM-2M-3M-4M-5M-6M-7M-8M-9

M-l 2M-14

M-l 5M-16BM-17AM-17BM-20AMCR-1MGC-1MGC-2MGC-3MGC-4MHR-1MJ-1MJ-2MW-1MW-2MW-3MW-5MW-6MW-7MW-8MW-9

NASNCS-2

NCS(B)-3NCS-5NCS-6NCS-7NCS(B)-8NCS-9NCS-ANCS-BNRMC-1NRMC-2NRMC-3PBI-1PIC-1RCA-1TGC-1TGR-1TGR-2TGR-3TGR-4TGR-5TGR-6TMTY-l

28218220

34044

11810220

1382213

208426347

150132302268

1444624

1981264068307688

262

2352008

58492937

504447

1391823505635

102

119163818

122

1234212617361723

22

17418

46181816

90

2

134124322674

1544830

2061284074348474

3618

20

12211030

54202016

104

13618

194134323080

1845028

19012448

148508474

2642

32

30017028

33232141814

96

14626

196124323266

136462626

102307432907896

4840

26

34424333000001413411110444444444444444101011133111101110111111001111101111111104

30018230

34054202016

104

14626

196134323280

1845030

20612848

148509088

4842

32

12211018

33232141814

90

1362

134124302266

136462426

1023068307674

2618

20

23515924

33644171915

98

14017

168128322872

1544827

1551204091378479

3733

25

57

Table B5. Chloride concentration of water from production wells, Guam, 1996--Continued

Y-2 24 24 32 30 4 32 24 28Y-3 20 24 20 24 4 24 20 22Y-4A 24 26 26 30 4 30 24 27Y-5 26 58 62 64 4 64 26 53

Y-6(506) 56 18 38 26 4 56 18 35Y-7 20 26 32 28 4 32 20 27Y-9 18 22 18 24 4 24 18 21Y-12 58 64 2 64 58 61Y-15 20 26 54 28 4 54 20 32

NOTE: Quarter 1 is the period January 1 through March 31, 1996Quarter 2 is the period April 1 through June 30, 1996Quarter 3 is the period July 1 through September 30, 1996Quarter 4 is the period October 1 through December 31, 1996

58

Table B6. Ground-water pumpage and chloride concentration by management zone and well, Guam, 1996 [Sub-basin and management-zone designations are from Camp, Dresser and McKee, Inc. (1982); Mgal/yr, million gallons per year; Mgal/day, million gallons per day; mg/L, milligrams per liter; Vol-wtd, mean annual volume-weighted chloride concentration; , no calculation; blank entries indicate no data; data from Guam Environmental Protection Agency, Guam Waterworks Authority, U.S. Air Force, and U.S. Navy.]

Sub-basin Management zone

Agafo Gumas 16

Agana

5

30

31

33

34

coastal

Well

AG-1 AG-2 HGC-2 HGC-3

total

A-19

A-2 A-7 A-8 A-12

total

A-l A-3 A-5 A-6

A-2 3 A-2 5 A-2 9 A-30 A-31

total

A-32 NRMC-1 NRMC-2 NRMC-3

total

NAS

A-15

A-2 6

A-4A-9A-10A-13A-14A-17

A-l 8A-21A-28

total

NCS(B)-3 NCS(B)-8

total

FFH-3FFH-4FFH-5AFFH-7FFH-8HRP-1HRP-2IE-1

PIC-1

Total pumpage Mgal/yr

69.054.6

191.726.7

342.0

91.2

133.894.3

120.2104.0

452.3

122.9120.2136.8166.8166.9145.0172.3380.6152.9

1564.5

58.793.676.667.0

295.9

9.1

143.1

30.3

76.1124.1122.2133.2132.1132.0107.5118.9136.0

1082.1

35.469.2

104.6

76.676.60.0

57.876.636.27.20.0

51.9

,niageday

0.20.10.50.1

0.9

0.2

0.40.30.30.3

1.3

0.30.30.40.50.50.40.51.00.4

4.3

0.20.30.20.2

0.9

0.0

0.4

0.1

0.20.30.30.40.40.40.30.30.4

3.0

0.10.2

0.3

0.20.20.00.20.20.10.00.00.1

Chlorideconcentration

mg/L

47281713

Vol-wtd 24

372

24272121

Vol-wtd 23

23192429315955

10133

Vol-wtd 51

24163818

Vol-wtd 24

157

85

52183300430324480436391173

Vol-wtd 318

182102

Vol-wtd 129

208426347

Percentage of total pumpage in the zone used in calculation of volume-weighted

chloride concentration

100

100

100

100

100

100

59

Table B6. Ground-water pumpage and chloride concentration by management zone and well, Guam, 1996- Continued

Andersen

Finegayan

38

18

19

41

42

43

coastal

Mangilao

9

36

37

coastal

Yigo 21

25

28

total

Y-15

coastal BPM(AF)

D-24 F-8 F-12 F-13

total

F-15 F-16

total

NCS-6

F-lF-2F-3F-4F-10F-ll

NCS-ANCS-BNCS-7

total

F-5 F-6 F-7 F-9

H-l

total

EX-11M-4 M-8

total

M-16B

M-l M-2 M-3 M-9

total

MCR-1

MGC-1 MGC-2 MGC-3 MGC-4

total

M-17A M-17B M-20A PBI-1

total

Y-3 Y-7 Y-9

Y-l

total

383.0

76.661, 69,92.4

300.4

130.214.6

51.7

59.543.376.370.574.183.031.060.288.6

586.5

81.293.789.170.1

334.2

146.5

93.680.1

110.6

284.3

44.1

60.396.5

117.186.3

360.3

0.0

18.07.714.133.6

73.4

96.3121.3108.514.2

340.4

1.0 Vol-wtd 244

0.0

32

25

0.20.20.20.3

0.9

0.40.0

0.4

0.1

0.20.10.20.20.20.20.10.20.2

1.6

0.20.30.20.2

0.9

0.4

0.30.20.3

0.8

0.1

0.20.30.30.2

1.0

0.0

0.00.00.00.1

0.1

0.30.30.3 o.o

0.9

0.30.40.1

592524

336

Vol-wtd 129

4417

Vol-wtd 41

56

157116107214235159

11935

Vol-wtd 141

12633110669

Vol-wtd 166

140

392827

Vol-wtd 31

37

16812832

155

Vol-wtd 110

262

235200

Vol-wtd 224

847996

122

Vol-wtd 88

222721

101.8 135.4 23.2

260.5

67.9

0.3 0.4 0.1

0.8

0.2

22 27 21

Vol-wtd 25

25

11

100

100

95

100

100

100

90

100

100

60


Y-2 74.5Y-5 80.9Y-6(506) 82.6

44

45

46

47

coastal

Southern Guam

total

D-12D-13D-19D-20D-21

NCS-2NCS-5

total

total

BCC

MW-3 MW-5 MW-6 MW-7 MW-8 MW-9 Y-4A

total

FM TMT

total

CCP-1CCP-2CCP-3CCP-4CCP-5CCP-6CIR-1,GOR-1MHR-1MJ-1MJ-2

RCA-1TGC-1TGR-1TGR-2TGR-3TGR-4TGR-5

305.9

89.783.9

100.0101.9116.876.019.3

587.7

D-lD-2D-3D-4D-5D-6D-7D-8D-9D-10D-llD-14D-15D-16D-17

D-l 8EX-5AGH-501M-5M-6M-7M-12M-14M-15MW-1MW-2

118.109.94.61.87.

106.108.103.95.

105.71.

103.104.102,103,93,

116,81,85,

10634,57

115,95,26,25

.1

.1

.5

.4

.0

.0

.5

.4

.4

.7

.5

.4

.2

.3

.0

.9

.7

.8

.9

.8

.2

.8

.4

.5

.8

.4

0.0.0.0.0.0.0.0.0.0.0.0.0,0,0,0,0,000000,0,00

.3

.3

.3

.2

.2

.3

.3

.3

.3

.3

.2

.3

.3

.3

.3

.3

.3

.2

.2

.3

.1

.2

.3

.3

.1

.1

2313.9

0.0

26.228.881.254.089.385.092.3

456.7

32.6 0.0

32.6

12.29.3

17.412.15.14.1

36.15.01.15.20.00.50.05.83.8

13.23.18.2

0.20.20.2

0.8

0.20.20.30.30.30.20.1

1.6

0.30.30.30.20.20.30.30.30.30.30.20.30.30.30.30.30.30.20.20.30.10.20.30.30.10.1

6.6

0.0

0.10.10.20.10.20.20.3

1.2

0.10.0

0.1

0.00.00.00.00.00.00.10.00.00.00.00.00.00.00.00.00.00.0

285335

Vol-wtd 36

60420836578

139350

Vol-wtd 140

70694143635968

24918688

12292

108104191110439872

15448

12040915849

Vol-wtd 97

2937

50444727

Vol-wtd 40

118

Vol-wtd

6680908536

322

208

373312342126173617

100

100

100

82

61


TGR-6 2.8 0.0 23

total 144.9 0.1 Vol-wtd 62 75

Additional wells D-22A 19.7 0.1 69not identified by F-17 106.5 0.3 19management zone F-18 70.8 0.2 15

IE-2 0.0 0.0NCS-9 78.6 0.2Y-12 110.8 0.3 61

Note: Total pumpage and mean pumpage are referenced from Table B2. Chloride-concentration data are referenced from table B5. Because of computational rounding, management-zone pumpage totals may not be exactly the same as the arithmetic sum of pumpages for the wells in each zone.

62

Table B7. Water-quality data for monitoring wells, Guam, 1996[All depths are in feet; Isd, land surface datum; msl, mean sea level; ft, feet; C, Celsius;mg/L, milligram per liter; cm, centimeter; , no data; U.S. Geological Survey provisional data.]

DATE

WELL EX-4

TIME

SAMPLE DEPTHWATER LEVEL (ft)

below Isd

below msl

TEMPER ATURE

(degrees C)

FIELD SPECIFIC

CONDUCTANCE (microsiemens/cm)

CHLORIDE CONCENTRATION

(mg/L)

Jan. 31 090809401015105011301210125013301405

6.23170340350360370380390

16186196206216226236

27.527.527.528.028.528.029.0

886925

109013206970

3660044100

101114164235

21101350016900

6.28

WELL EX-7

Feb. 2 0759083509150955104011251210

3.29290390410420430450

7107127137147167

28.028.528.028.529.028.0

443427

33200413004640050700

1911

11900156001780019800

WELL EX-9

Feb. 12 0920094010151055113512151255133514151450

3.33260340345350360380400450

21101106111121141161211

28.028.028.028.028.028.028.028.0

5357560

129002140033200436004750049900

24225041407440

12100166001830019500

3.43

63

SECTION C

Ocean Tides

64

1.4

1-2 hLU

LU 1.0 COzLL" 0.8

O

LU 0.6

p

in 0.4

LU 0.2

LU 0 Q

-0.2

-0.4

EXPLANATION

daily mean ocean-tide level

monthly mean ocean-tide level

M M J J 1996

O

Figure Cl. Daily mean and monthly mean ocean-tide levels at Agana, Guam, 1996. Data are from the U.S. Geological Survey and are provisional.

65

Table Cl. Daily mean ocean-tide levels at Agana, Guam, 1996[Values are in feet relative to mean sea level; , no data; U.S. Geological Survey provisional data.]

Tide Gage at Agana


12345

6789

10

1112131415

1617181920

2122232425

262728293031

MEANMAXMIN

.36

.30

.33

.35

.41

.39

.42

.37

.39

.40

.45

.41

.55

.44

.55

.57

.58

.55

.60

.62

.64

.56

.56

.45

.43

.51

.52

.52

.55

.54

.52

.48

.64

.30

.55

.66

.65

.83

.91

.75

.68

.63

.76

.70

.58

.71

.72

.67

.76

.71

.75

.77

.75

.72

.78

.85

.67

.63

.67

.71

.67

.62

.63

.71

.91

.55

.67

.66

.70

.68

.68

.73

.71

.65

.67

.59

.57

.59

.54

.53

.64

.71

.72

.67

.70

.70

.70

.69

.65

.64

.69

.71

.70

.73

.77

.75

.77

.67

.77

.53

.78

.84

.80

.62

.65

.67

.64

.59

.61

.66

.67

.68

.64

.73

.73

.72

.72

.67

.64

.64

.64

.67

.69

.70

.72

.74

.76

.77

.78

.78

.70

.84

.59

.80

.75

.69

.67

.63

.57

.63

.67

.68

.69

.73

.70

.70

.74

.81

.77

.75

.73

.78

.72

.63

.64

.67

.69

.62

.62

.68

.71

.76

.74

.77

.70

.81

.57

.79

.81

.80

.77

.78

.82

.85

.87

.87

.90

.90

.87

.85

.86

.81

.78

.76

.80

.82

.78

.76

.79

.74

.73

.71

.70

.68

.72

.67

.73

.79

.90

.67

.82

.82

.86

.93

.98

1.041.061.031.00.99

.96

.90

.90

.83

.79

.86

.88

.89

.92

.93

.88

.87

.93

.95

.98

.96

.991.00.93.94.99

.931.06.79

.98

.93

.81

.77

.82

.83

.85

.80

.89

.94

.88

.86

.86

.80

.84

.84

.88

.88

.90

.86

.77

.77

.73

.77

.73

.75

.76

.83

.86

.85

.79

.83

.98

.73

.78

.80

.84

.84

.81

.79

.84

.85

.78

.77

.84

.84

.84

.75

.71

.75

.74

.78

.85

.81

.77

.69

.72

.80

.80

.74

.73

.64

.67

.53

.77

.85

.53

.44

.39

.48

.51

.53

.51

.50

.50

.49

.53

.57

.48

.46

.50

.45

.43

.41

.42

.35

.58

.56

.56

.65

.70

.68

.65

.61

.59

.54

.47

.41

.51

.70

.35

.49

.47

.54

.61

.67

.72

.95

.76

.57

.33

.29

.38

.25

.28

.16

.38

.13

.26

.16

.24

.23

.35

.35

.42

.32

.31

.23

.25

.18

.20

.38

.95

.13

.08

.09

.07

.13

.15

.15

.02

.03

.04

.00

.00

.03-.07-.14-.25

-.24-.27-.22-.15-.21

-.24-.13.00

-.07-.10

-.12-.05.03.18.03.05

-.04.18

-.27

66

REFERENCES CITED

Camp, Dresser and McKee, Inc., 1982, Aquifer yield report, northern Guam lens study: Report forthe Government of Guam, Guam Environmental Protection Agency, Guam, December 1982,variously paged.

National Oceanic and Atmospheric Administration, 1996, Climatological Data, Hawaii and Pacific,vol. 92, no. 1-9.

U.S. Environmental Protection Agency, 1991, Secondary maximum contaminant levels (section143.3 of part 143, National secondary drinking water regulations): U.S. Code of FederalRegulations, Title 40, Parts 100 to 149, revised through July 1, 1991.

Ward, P.E., Hoffard, S.H., and Davis D.A., 1965, Hydrology of Guam: U.S. Geological SurveyProfessional Paper 403-H, 28 p.

67

rainfall, ground-water, and ocean-tide data, guam, 1996

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