Sabaneta Pt
145°48'
Saddok Tasi monitor well 1 (ST-MW1) 0 EA S 15°16' 3/11/99 20 7/23/99 10/14/99 E 40 IN Marpi P Quarry P 60 I
IL Fanonchuluyan
T E E F N I , E L B A H
80 P Bay N
T R E T San Roque A
A E 100 C Mañagaha O Achugao Spring (Bobo Achugao) 120 Island 145°44' C
140 Tanapag II Spring (Bobo Mames) I
W W O L E B H T P E D IF 160 Tanapag Tanapag I Spring (Bobo Agatan) C Harbor A 180 ST-MW1 P
0 Puerto
Muchot Pt Rico tr S
2 , 0 4 , 0 6 , 0 8 , 0
1 0 , 1 2 , 0 1 4 , 0 1 6 , 0 1 8 , 0 2 0 , Kagman monitor well 3 (KG-MW3) u F Str 0 a South k T lufofo g a 9/24/98 CHLORIDE CONCENTRATION, Sablan u Quarry p IN MILLIGRAMS PER LITER a 20 3/15/99 and R 10/14/99
Maui IV Capital
T E
Hill E 40
F N
Donni Spring I
,
15°12' Calhoun (Bobo I Denni) E 60
L B
A T Koblerville monitor well 1 (KV-MW1)
0 80
R E T
7/20/99 A Gualo Akgak AG-MW1 20 10/18/99 Rai 100
40 120 Mt. Tagpochau
60 140
W W O L E B H T P E D
T E E F N I , E L B A
80 160
T R E
T Chalan Kagman A 100 Kiya 180 0 2 , 0 4 , 0 6 , 0 8 , 0 120 KG-MW3 1 0 , 1 2 , 0 1 4 , 0 1 6 , 0 1 8 , 0 2 0 , CHLORIDE CONCENTRATION, Lake San Vicente Kagman IN MILLIGRAMS PER LITER
140 Susupe
W W O L E B H T P E D Peninsula Dan Dan monitor well 1 (DD-MW1) 0 160 3/12/99 Chalan Dan Dan Kanoa 20 7/21/99 180 10/20/99
0 Laolao
T E E 40 2 , 0 4 , 0 6 , 0 8 , 0
1 0 , 1 2 , 0 1 4 , 0 1 6 , 0 1 8 , 0 2 0 , Bay
F N
DD-MW1 I
,
CHLORIDE CONCENTRATION, E 60 L IN MILLIGRAMS PER LITER B
San A T 15°08'
Antonio 80
R E IF-MW1 T Isley Field monitor well 2 (IF-MW2) A 0 100 KV-MW1 IF-MW2 9/28/98 3/10/99 Isley 20 120 Agingan Pt Reservoir 10/15/99
CPA Isley Field
T E Tower E
Koblerville and Obyan 40 140
F N
I
W W O L E B H T P E D
,
OB-MW1 Saipan E 60 160 L Obyan monitor well 1 (OB-MW1) B
0 International A T 10/5/98 Airport 80 180
0
R E 20 3/9/99 T 10/18/99 A 100 2 , 0 4 , 0 6 , 0 8 , 0 1 0 , 1 2 , 0 1 4 , 0 1 6 , 0 1 8 , 0 2 0 , 40 CHLORIDE CONCENTRATION, Base modified from 120 U.S.Geological Survey, 1:25,000, Island of Saipan, 1983 IN MILLIGRAMS PER LITER 60 Shaded relief from USGS digital elevation model 0 1 2 MILES
140
T E E F N I , E L B A
W W O L E B H T P E 80 D
I Naftan Pt
T R E
T 0 1 2 KILOMETERS 160 A 100 180
120 0 2 , 0 4 , 0 6 , 0 8 , 0 1 0 , 1 2 , 0 1 4 , 0 1 6 , 0 1 8 , 0 2 0 ,
140 CHLORIDE CONCENTRATION,
W W O L E B H T P E D IN MILLIGRAMS PER LITER 160
180 0 2 , 0 4 , 0 6 , 0 8 , 0 1 0 , 1 2 , 0 1 4 , 0 1 6 , 0 1 8 , 0 2 0 , CHLORIDE CONCENTRATION, IN MILLIGRAMS PER LITER
EXPLANATION
Puerto Rico MUNICIPAL WELL FIELD AND NAME
LOW-PERMEABILITY VOLCANIC ROCKS AT OR ABOVE SEA LEVEL
IF-MW1 MONITOR WELL AND NAME
KV-MW1 DEEP-PROFILING MONITOR WELL AND NAME
Isley Reservoir RAINFALL STATION AND NAME
SEA-LEVEL STATION
Donni Spring (Bobo I Denni) DEVELOPED SPRING AND NAME
LINE OF SECTION -- SEE FIGURE 5
Figure 8. Municipal well fields, low-permeability volcanic rocks at sea level, and chloride concentration with depth at deep-profiling monitor wells, Saipan (water samples collected by the USGS were analyzed for chloride concentration by the CUC laboratory).