II 

Calendar No. 614 

111TH CONGRESS 

2D SESSION H. R. 4252 

[Report No. 111–328] 

IN THE SENATE OF THE UNITED STATES 

MARCH 19, 2010 

Received; read twice and referred to the Committee on Energy and Natural 

Resources 

SEPTEMBER 27, 2010 

Reported by Mr. BINGAMAN, without amendment 

AN ACT 

To direct the Secretary of the Interior to conduct a study 

of water resources in the Rialto-Colton Basin in the 

State of California, and for other purposes. 

1 Be it enacted by the Senate and House of Representa2 tives of the United States of America in Congress assembled, 

3 SECTION 1. SHORT TITLE. 

4 This Act may be cited as the ‘‘Inland Empire Per5 chlorate Ground Water Plume Assessment Act of 2010’’. 


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•HR 4252 RS

1 SEC. 2. RIALTO-COLTON BASIN, CALIFORNIA, WATER RE2 SOURCES STUDY. 

3 (a) IN GENERAL.—Not later than 2 years after funds 

4 are made available to carry out this Act, the Secretary 

5 of the Interior, acting through the Director of the United 

6 States Geological Survey, shall complete a study of water 

7 resources in the Rialto-Colton Basin in the State of Cali8 fornia (in this section referred to as the ‘‘Basin’’), includ9 ing— 

10 (1) a survey of ground water resources in the 

11 Basin, including an analysis of— 

12 (A) the delineation, either horizontally or 

13 vertically, of the aquifers in the Basin, includ14 ing the quantity of water in the aquifers; 

15 (B) the availability of ground water re16 sources for human use; 

17 (C) the salinity of ground water resources; 

18 (D) the identification of a recent surge in 

19 perchlorate concentrations in ground water, 

20 whether significant sources are being flushed 

21 through the vadose zone, or if perchlorate is 

22 being remobilized; 

23 (E) the identification of impacts and 

24 extents of all source areas that contribute to 

25 the regional plume to be fully characterized; 


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•HR 4252 RS

1 (F) the potential of the ground water re2 sources to recharge; 

3 (G) the interaction between ground water 

4 and surface water; 

5 (H) the susceptibility of the aquifers to 

6 contamination, including identifying the extent 

7 of commingling of plume emanating within sur8 rounding areas in San Bernardino County, 

9 California; and 

10 (I) any other relevant criteria; and 

11 (2) a characterization of surface and bedrock 

12 geology of the Basin, including the effect of the geol13 ogy on ground water yield and quality. 

14 (b) COORDINATION.—The Secretary shall carry out 

15 the study in coordination with the State of California and 

16 any other entities that the Secretary determines to be ap17 propriate, including other Federal agencies and institu18 tions of higher education. 

19 (c) REPORT.—Upon completion of the study, the Sec20 retary shall submit to the Committee on Energy and Nat21 ural Resources of the Senate and the Committee on Nat22 ural Resources of the House of Representatives a report 

23 that describes the results of the study. 


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Calendar No. 614 

111TH CONGRESS 

2D SESSION H. R. 4252 

[Report No. 111–328] 

AN ACT 

To direct the Secretary of the Interior to conduct 

purposes. Basin in the State of California, and for other a study of water resources in the Rialto-Colton 

SEPTEMBER 27, 2010 

Reported without amendment 


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