Discussion -- An MCLG of 0.0002 mg/L for lindane is proposed based 

 upon a provisional DWEL of 0.01 mg/L and an assumed drinking water 

 contribution of 20%. A DWEL of 0.01 mg/L was calculated from a 

 NOAEL of 0.3 mg/kg/day in rats (feeding study) with an uncertainty 

 factor of 1000 and a consumption of 2 L of water/day. Reference-- 50 

 FR 46936 Part IV (11/13/85) 



EPA Contact - Criteria and Standards Division, ODW / 

 (202)382-7571 / FTS 382-7571; or Drinking Water Hotline / (800)426- 

 4791 



W.B2. MAXIMUM CONTAMINANT LEVEL (MCL) for Drinking 

 Water 



Value (status) - 0.004 mg/L (Interim, 1980) 



Considers technological or economic feasibility? — NO 



Reference - 45 FR 57332 (08/27/80) 



EPA Contact - Yogendra Patel / Criteria and Standards Division, 



ODW/ 



(202)382-7571 / FTS 382-7571; or Drinking Water HotUne / (800)426- 



4791 



rV.C. CLEAN WATER ACT (CWA) 



rV.C.l. AMBIENT WATER QUALITY CRITERIA, Human Health 



Water and Fish Consumption: 1.86E-2 ug/L 

 Fish Consumption Only: 6.25E-2 ug/L 

 Considers technological or economic feasibility? — NO 

 Discussion — For the maximum protection from the potential car- 

 cinogenic properties of this chemical, the ambient concentration 

 should be zero. However, zero may not be attainable at this time so the 

 criteria given represent a E-6 incremental increase in cancer risk over 

 a lifetime. 



Reference - 45 FR 79318 (11/28/80) 

 EPA Contact - Criteria and Standards Division, OWRS 

 (202)475-7315 / FTS 475-7315 



rV,C2. AMBIENT WATER QUALITY CRITERIA, Aquatic Or- 

 ganisms 



Freshwater: 

 Acute- 2.0E-t-0ug/L 

 Chronic- 8.0E-2ug/L 

 Marine: 



Acute- 1.6E-1 ug/L 

 Chronic — None 



Considers technological or economic feasibility? - NO 

 Discussion - Water quality criteria for the protection of aquatic Hfe 

 are derived from a minimum data base of acute and chronic tests on a 

 variety of aquatic organisms. The data are assumed to be statistically 

 representative and are used to calculate concentrations which will not 

 have significant short- or long-term effects on 95% of the organisms 

 exposed. Recent criteria (1985 and later) contain duration and fre- 

 quency stipulations: the acute criteria maximum concentration is a 

 1-hour average and the chronic criteria continuous concentration is a 

 4-day average which are not to be exceeded more than once every 3 

 years, on the average (sec Stephen et al., 1985). Earlier criteria (1980- 

 1984) contained instantaneous acute and 24-hour average chronic 



