Page 77 - Microsoft Word -Cow Book 10-06-09 final update.doc

degrees within 4 hours of starting the first milking. Many of these problems
have been alleviated by adding pre-coolers and larger more efficient bulk
tanks at the facility.

2. Milk tank cooling requirements are also found in 3-A Standard, Number 13-##
(## is the most current revision).

This Standard requires that farm bulk milk tanks must be designed to cool the
o
o
milk in the tank from 90 F to 50 F within the first hour after being filled to the
o
o
corresponding volume and from 50 F to 40 F within the next hour.

This Standard is based on the following criteria:

 Everyday pick up filled to 50% of its rated capacity.
 Every other day pick-up filled to 25% of its rated capacity.
 Second or subsequent milkings it must prevent the blend temperature
o
to rise above 50 F during the addition of milk.

o
NOTE: The cooling capacity is determined at ambient temperature of 90 F
for water cooled condensers are used and using refrigerant
o
condensing temperatures not less than 103 F.

3. Recirculated cooling water (ice banks or sweet water tanks) must meet the
bacteriological standards of Appendix G; be properly protected; and be
sampled semiannually by the regulatory agency. Samples shall be analyzed
in a regulatory agency or in an EPA approved laboratory.

4. After January 1, 2000, all newly manufactured farm bulk tanks shall be
equipped with an approved temperature recording device and shall meet the
additional requirements in the PMO. Such as, no overlapping on the charts
and the charts must be maintained for six months. In addition, recording
devices shall be verified every six months.

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