618 



improvements in waste treatment and disposal system design and 

 operation. 



{d) Other specific needs are met on a particular problem basis. 

 The general characteristics of the minimum monitoring program 

 are described below: 



(2) Sampling. — All samples (except for grab samples collected for 

 special analyses for high decay rate constituents) collected for routine 

 analysis should be near-continuous, proportional composite samples 

 which accurately represent the characteristics of the waste stream 

 (i.e., floatable, suspended, and dissolved constituents) with respect 

 to their true mass emission rates (i.e., lbs/day) . 



Sufficient samples should be collected to provide an adequate sta- 

 tistical description for both the constituent concentration and the 

 mass emission rate of the contaminant. After the waste has been sta- 

 tistically defined, analyses not pertinent to the local problem or to 

 the wastes characterization should be deleted. 



(3) Analyses. — The following analyses should be conducted on es- 

 sentially all samples collected : 



(a) Floatable matter — method needs development; 



(h) Total and organic suspended solid — methods adequate; 



( c ) Acute toxicity — method needs review ; 



(d) Persistent pesticides — method needs review; 



(e) Persistent organic compounds — method needs develop- 

 ment; 



(/) Biostimulants — method needs development ; 

 {g) Gross heavy metals — method needs development; 

 {h) Coliforms (or equivalent) — method under continuous re- 

 view; 



(^) Radioactivity — methods adequate. 



(4) Supplemental information : 



(a) Information on the accuracy and precision of both the sampling 

 and analytical methods is to be obtained and reported. 



(b) Data should be obtained on the level of waste-generating ac- 

 tivity (i.e., for municipal waste — population tributary; for industrial 

 wastes, level of production and type — ^tons of product/day, and so 

 forth) so that waste discharges can be reported on a unit mass emis- 

 sion rate basis (i.e., Ibs/capita-day or lbs/10 ^ lbs) product. 



(5) Significant discharge. — It should be noted that the recom- 

 mended minimum monitoring program is, as stated, the minimum to 

 be applied to all "significant" waste discharges. Many significant waste 

 discharges may require numerous additional characteristics or param- 

 eters to be added to the minimum listing to describe properly the 

 waste characteristics. For example, cooling water discharges may 

 require numerous additional characteristics or parameters such as 

 temperature, heat flux, density, etc., to be added to the minimum 

 listing to describe properly the waste characteristics. 



Considerable investigation and study will be needed to define prop- 

 erly waste discharges that should be specifically included in the "sig- 

 nificant discharge" category. It should be obvious that a number of 

 considerations are involved in the decision as to whether or not a 

 particular waste discharge is "significant." Some of the considera- 

 tions are : 



