Code of Colorado Regulations
1000 - Department of Public Health and Environment
1002 - Water Quality Control Commission (1002 Series)
5 CCR 1002-64 - REGULATION NO. 64 - BIOSOLIDS REGULATION
Section 5 CCR 1002-64.16 - MONITORING AND ANALYSIS
Universal Citation: 5 CO Code Regs 1002-64 ยง 16
Current through Register Vol. 47, No. 17, September 10, 2024
A. Biosolids Monitoring.
(1) For purposes of this section, "Annual
Biosolids Production" is defined as the amount of biosolids (dry weight basis)
applied to the land, which also includes those facilities that further process
biosolids, e.g. "composting", that is distributed to the public. Collection and
analysis of biosolids shall be accomplished after final treatment and at the
frequencies specified in Table 7. When sampling is required once per year
samples shall be collected during the fourth quarter (October 1 through
December 31) unless the Division approves otherwise.
TABLE 7. - FREQUENCY OF BIOSOLIDS SAMPLE COLLECTION AND ANALYSIS
|
ANNUAL BIOSOLIDS PRODUCTION(dry short tons/year) |
FREQUENCY |
|
less than 319 |
once per year |
|
319 to less than 1,650 |
once per quarter |
|
1,650 to less than 16,500 |
once per two months |
|
16,500 and greater |
monthly |
(2)
Notwithstanding the requirements of Table 7 above, collection and analysis of
biosolids samples from wastewater treatment lagoons shall be required prior to
removal and use or distribution of the biosolids. Sampling shall be described
in a sampling plan submitted to the Division for review and approval and shall
be undertaken in accordance with the approved plan.
(3) Analysis of biosolids samples shall
include the parameters identified in Table 8.
TABLE 8. - BIOSOLIDS ANALYSES AND REPORTING UNITS
|
PARAMETERS |
UNITS |
PARAMETERS |
UNITS |
|
total solids |
percent |
volatile solids |
percent of total solids |
|
pH |
standard units |
organic nitrogen as N |
percent dry weight |
|
total phosphorus |
percent dry weight |
total ammonia as N |
percent dry weight |
|
total potassium |
percent dry weight |
nitrate as N |
percent dry weight |
|
total arsenic |
mg/kg dry weight |
total mercury |
mg/kg dry weight |
|
total cadmium |
mg/kg dry weight |
total molybdenum |
mg/kg dry weight |
|
total nickel |
mg/kg dry weight |
||
|
total copper |
mg/kg dry weight |
total selenium |
mg/kg dry weight |
|
total lead |
mg/kg dry weight |
total zinc |
mg/kg dry weight |
(4)
Samples collected to satisfy the requirements of paragraphs (3) of this
subsection shall be composite samples. Individual composite samples shall be
collected either in a storage area or at the outlet of a biosolids application
device immediately prior to application. A composite sample of liquid biosolids
shall consist of a minimum of three grab samples of no less than 500 ml each
taken at equal intervals so as to be representative of the entire pumping
cycle. A composite sample of dewatered biosolids shall consist of a minimum of
three grab samples of no less than 0.5 pounds collected so as to be
representative of the volume of biosolids applied within a twenty-four hour
period, and combined.
(5)
Notwithstanding the requirements of paragraph (3) above, biosolids shall also
be analyzed for such parameters as necessary to demonstrate compliance with the
pathogen destruction and vector attraction reduction requirements of sections
64.12 and 64.12 of these regulations as appropriate for the use and
distribution option(s) practiced. Compliance with Class A pathogen requirements
shall be demonstrated using multiple tube assays. Compliance with Class B
pathogen requirements may use either multiple tube or membrane filter methods.
Analyses demonstrating pathogen destruction and vector attraction reduction
shall be performed at the frequencies specified in section 64.16 , Table 7 of
these regulations. Samples collected to satisfy the requirements of this
paragraph shall be grab samples.
(6) All methods used for the analysis of
biosolids samples must be approved by the Division.
(7) All nutrient and metals (Table 8),
pathogen destruction, and Vector Attraction Reduction data collected for
compliance with these regulations, may be valid for up to a maximum of 12
months from the date the sample was collected.
B. Soils Monitoring.
(1) Collection and analysis of soils for the
parameters identified in Table 9 shall be accomplished prior to the initial
biosolids application and on a once per application basis thereafter. Sampling
conducted subsequent to the initial sampling event shall occur after completion
of the cropping cycle, i.e. after harvest, but prior to any additional
application. For purposes of this section biosolids application shall be
considered as one or more individual application of biosolids which are
intended to supply the agronomic nitrogen requirement for the crop for a single
cropping cycle.
TABLE 9. - SOILS FERTILITY ANALYSES AND REPORTING UNITS
|
PARAMETERS |
UNITS |
PARAMETERS |
UNITS |
|
pH |
standard units |
conductivity |
mmhos/cm |
|
ammonium as N |
mg/kg |
organic matter |
percent |
|
nitrate as N |
mg/kg |
available phosphorus |
ppm extract |
|
total phosphorus |
mg/kg |
(2)
Analysis of soil samples for the parameters listed in Table 9 shall be
performed using methods approved by the Division.
(3) Samples collected to satisfy the
requirements of paragraph (1) of this subsection shall be composite samples
made up of soil taken from no fewer than sixteen core holes per 320 acres and
completely mixed to form a minimum one-pound sample.
(a) A minimum of one composite sample per 320
acres is required. The Division may require more intensive sampling in
instances where multiple crops are cultivated or different soil types are
present.
(b) Except as otherwise
required in the Notice of Authorization for the Use or Distribution of
Biosolids samples shall be collected to a depth of one foot and
composited.
(c) Notwithstanding any
other requirements of this section 64.16 , the Division may require deep soil
(nitrate) monitoring.
(4) The Division may specify more frequent
monitoring than otherwise required in paragraphs (1) and (3) above when
biosolids are applied for the reclamation of disturbed land.
C. Additional Monitoring.
(1) Additional
monitoring, including but not limited to monitoring of additional biosolids or
soils parameters, monitoring of biosolids or soils parameters more frequently
than otherwise specified, deep soil monitoring, monitoring of groundwater,
monitoring surface water, or monitoring of plant tissue may be required by the
Division.
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