The technologies listed in Table 64447.2-A are the best available technology, treatment techniques, or other means available for achieving compliance with the MCLs in Table 64431-A for inorganic chemicals.

Table 64447.2-A Best Available Technologies (BATs) Inorganic Chemicals

Chemical

Best Available Technologies (BATs)

Aluminum

10

Antimony

2, 7

Arsenic

1, 2, 5, 6, 7, 9, 13

Asbestos

2, 3, 8

Barium

5, 6, 7, 9

Beryllium

1, 2, 5, 6, 7

Cadmium

2, 5, 6, 7

Chromium (hexavalent)

5, 7, 14

Chromium (total)

2, 5, 6^a, 7

Cyanide

5, 7, 11

Fluoride

1

Mercury

2^b, 4, 6^b, 7^b

Nickel

5, 6, 7

Nitrate

5, 7, 9

Nitrite

5, 7

Perchlorate

5, 12

Selenium

1, 2^c, 6, 7, 9

Thallium

1, 5

__________

^a BAT for chromium III (trivalent chromium) only.

^b BAT only if influent mercury concentrations <10 μg/L.

^c BAT for selenium IV only.

Key to BATs in Table 64447.2-A:

1 = Activated Alumina

2 = Coagulation/Filtration (not BAT for systems <500 service connections)

3 = Direct and Diatomite Filtration

4 = Granular Activated Carbon

5 = Ion Exchange

6 = Lime Softening (not BAT for systems <500 service connections)

7 = Reverse Osmosis

8 = Corrosion Control

9 = Electrodialysis

10 = Optimizing treatment and reducing aluminum added

11 = Chlorine oxidation

12 = Biological fluidized bed reactor

13 = Oxidation/Filtration

14= Reduction/Coagulation/Filtration

Note: Authority cited: Sections 116271, 116293(b), 116350 and 116375, Health and Safety Code. Reference: Section 116370, Health and Safety Code.

History

1. New section filed 9-8-94 as an emergency; operative 9-8-94 (Register 94, No. 36). A Certificate of Compliance must be transmitted to OAL by 1-6-95 or emergency language will be repealed by operation of law on the following day. For prior history, see Register 88, No. 51.

2. New section refiled 1-3-95 as an emergency; operative 1-3-95 (Register 95, No. 1). A Certificate of Compliance must be transmitted to OAL by 5-3-95 or emergency language will be repealed by operation of law on the following day.

3. New section refiled 4-26-95 as an emergency; operative 4-26-95 (Register 95, No. 17). A Certificate of Compliance must be transmitted to OAL by 8-24-95 or emergency language will be repealed by operation of law on the following day.

4. Certificate of Compliance as to 4-26-95 order including amendment of section heading, first paragraph and Table 64447.2-A transmitted to OAL 5-5-95 and filed 6-19-95 (Register 95, No. 25).

5. Amendment of Table and Note filed 4-17-2000; operative 5-17-2000 (Register 2000, No. 16).

6. Amendment of section and Note filed 9-18-2007; operative 10-18-2007 (Register 2007, No. 38).

7. Amendment of Table 64447.2-A and amendment of Note filed 10-29-2008; operative 11-28-2008 (Register 2008, No. 44).

8. Amendment of section and Note filed 5-28-2014; operative 7-1-2014 (Register 2014, No. 22).

9. Change without regulatory effect amending Table 64447.2-A filed 9-11-2017 pursuant to section 100, title 1, California Code of Regulations (Register 2017, No. 37).

10. Amendment of section and Note filed 7-24-2024; operative 10-1-2024 (Register 2024, No. 30).