Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. of
Sub-Agency 0011 - Water Quality
Chapter 15 - USE OF SURFACE DISPOSAL OF BIOSOLIDS, APP. A-C
Part B - LAND APPLICATION
Section 17 - Frequency of monitoring

(i) The frequency of monitoring for the pollutants listed in Table 1, Table 2, Table 3 and Table 4 of Section 14; the pathogen density requirements in Section 31(a) and in Section 31(b) (ii) through Section 31(b) (iv); and the vector attraction reduction requirements Section 32(f) through Section 32(m) shall be the frequency in Table 1 of Section 17. Any person who prepares or derives bulk biosolids shall conduct the monitoring required by this section.

Table 1 of Section 17

Frequency Of Monitoring - Land Application

Amount of biosolids*

(metric tons per 365 day period) Frequency

Greater than zero but Once per year

less than 290

Equal to or greater than Once per quarter

290 but less than 1,500 (four times per year)

Equal to or greater than Once per 60 days

1,500 but less than 15,000 (six times per year)

Equal to or greater than Once per month

15,000 (12 times per year)

* Either the amount of bulk biosolids applied to the land or the amount of biosolids received by a person who prepares biosolids that are sold or given away in a bag or other container for application to the land (dry weight basis).

(ii) After the biosolids have been monitored for two years at the frequency in Table 1 of Section 17, the permitting authority may reduce the frequency of monitoring for pollutant concentrations and for the pathogen density requirements in Section 31(a) (v) (B) through (I), but in no case shall the frequency of monitoring be less than once per year when biosolids are applied to the land.