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Placerita Canyon Site Order No. 89-16
Monitoring & Reporting Program No. CI-6857

The Discharger shall conduct groundwater monitoring at the site. Groundwater samples shall be
collected from groundwater monitoring wells PMW-3A, PMW-7, and PMW-15 to monitor
groundwater quality at the site. Groundwater shall be monitored in accordance with the following
groundwater monitoring program:

ANALYTICAL MINIMUM FREQUENCY
CONSTITUENT UNITS
METHOD , OF ANALYSIS
Benzene EPA 8260B Pa S emi-Annual
1,l-Dichloroethane EPA 8260B Pg/L S emi-Annual
1,2-Dichloroethane EPA 8260B Pg/L Semi-Annual
1,l -Dichloroethene EPA 8260B PdL Semi-Annual
Tetrachloroethene EPA 8260B Pg/L Semi-Annual
1 , 1 , 1 -Trichloroethane EPA 8260B PgL Semi-Annual
Toluene EPA 8260B mg/L Semi-Annual
Trichloroethene EPA 8260B mgk Semi-Annual
trans- 1,2-Dichloroetl1ene EPA 8260B mgL Semi-Annual
cis- l,2-Dichloroethene EPA 8260B mdL S emi-Annual
Xylenes EPA 8260B mdL S emi-Annual
Total dissolved solids (TDS) EPA 160.1 mdL Semi-Annual
Sulfate EPA 300 mg/L Semi-Annual
i
I Chloride EPA 300 mg/L Semi-Annual
Boron EPA 60 1 0B ma Semi-Annual '
\
Feet, below
Depth to Groundwater In situ ~emi-~nnual~~~
top of casing
Groundwater elevation will be calculated fiom depth to groundwater (measured in feet below top of casing) and
the reference elevation (in feet above mean sea level) at top of casing.
In addition to PMW3A, PMW-7, and PMW-15, water levels will.be recorded at monitoring locations PMW-2,
, PMW-3, PMW-SBR, PMW-6, PMW-11, and PMW-14 during semi-annual monitoring events for the purpose of
estimating groundwater flow direction.

All groundwater monitoring reports must include, at a minimum, the following:
a. Well identification, date and time of sampling;
b. Sampler identification, and laboratory identification;
,
c. Semi-annual observation of groundwater levels recorded to 0.01 feet above mean sea
level and groundwater flow direction
,