TABLE 2.

Average E. caproni ovum recoveries^a

Date of sampling (mo/day/yr) or additional samples after matrix spikes	Plant	Treatment stage	Avg recovery (%)	Maximum recovery (%)	Minimum recovery (%)
10/19/15	Pine Creek	Post-grit removal	2.4	3.9	1.7
		Post-UV	1.0	1.6	0.7
10/26/15	Bonnybrook	Post-grit removal	0.9	1.5	0.7
		Post-UV	1.1	1.8	0.8
11/9/15	Pine Creek	Post-grit removal	1.5	2.4	1.1
		Post-UV	0.8	1.4	0.6
11/9/15	Bonnybrook	Post-grit removal	2.2	3.5	1.6
		Post-UV	3.2	5.1	2.3
12/7/15	Pine Creek	Post-grit removal	0.7	1.2	0.6
		Post-UV	0.9	1.5	0.7
12/14/15	Bonnybrook	Post-grit removal	0.6	1.0	0.4
		Post-UV	1.6	2.5	1.2
Additional samples	Pine Creek	Post-grit removal	9.1	14	6.6
		Post-UV	6.4	10	4.7
	Pine Creek	Post-grit removal	5.1	8.2	3.7
		Post-UV	13	22	10
	Pine Creek	Post-grit removal	8.6	13	6.2
		Post-UV	14	22	10
	Pine Creek	Post-grit removal	6.5	10	4.7
		Post-UV	9.7	15	7.0

^aAverage recovery is based on a 10-ovum E. caproni spike into the wastewater performed in triplicate. Maximum and minimum recoveries are calculated based on the maximum and minimum values observed for the copy numbers of 10 E. caproni ova in 4 replicates. These values are 1.1 × 10⁶ and 4.7 × 10⁶, respectively. Additional spikes (in triplicate) were performed to better capture variation in the extraction method.