Page 101 - Beaumont Basin Watermaster - DRAFT 2016 Annual Report

Vanadium. Three water samples were tested for vanadium during the reporting period from
SMWC’s Well 4 and YVWD No. 48. Vanadium at the SMWC well has been consistently hovering
around 100 ug/L doubling the state notification level of 50 ug/L. Vanadium concentration at YVWD
No. 48 was 25 ug/L, which is half the state notification level.

Copper. There were 42 water samples collected and tested for copper during the reporting
period. Over the last five years only one well has exceeded the detection limit of 50 ug/L; the
Rancho Calimesa Well No. 2 at 62 ug/L (Feb 2013). This concentration is significantly below the
state primary MCL of 1,000 ug/L. This is consistent with previous reporting periods.

4.2.3 pH
There are two secondary standards for pH, a lower limit of 6.5 and an upper limit of 8.5. With
the exception of one well, all other production wells were within these limits. pH
concentrations ranging from a low of 7.0 to a high of 8.9 (SMWC Well No. 4) with most wells in
the 7.8 to 8.0 range. Four wells in the basin exceeded the upper limit for pH during the FY
2004-08 reporting period.

4.2.4 Turbidity
Turbidity is a measure of the cloudiness of water, and is used to indicate water quality and
filtration effectiveness. All production wells in the Basin were tested for turbidity and none
exceeded the primary federal and state MCL of 5 NTU.

Beaumont Basin Watermaster 2016 Annual Report – DRAFT – August 2017 4-9