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Second Quarter 2015 Site Status Report August 14, 2015
<br /> Former Nestle USA, Inc. Facility, Ripon, CA
<br /> o Eight Diamond Pet Food wells (PW-6, PW-8, TH-1, TH-7, TH-8, TH-9, TH-
<br /> 10, and TH-11),
<br /> o Four private irrigation wells (RPS-1, RC-2, CALTRANS, and 7507 Kiernan
<br /> Ave-I rr),
<br /> o One IRAP treatment system at 230 Industrial Avenue (influent, mid-point
<br /> and effluent),
<br /> o Three domestic well treatment s ystems (5725 Hall Ro ad, 7501 Kiernan
<br /> Avenue, and 802 Vera Avenue), and
<br /> o Twelve domestic wells (110 Manley Road, 361 Parallel Avenue, 5500 Hall
<br /> Road, 5724 Hall Road, 7717 Kiernan Avenue, 7961 Kiernan Avenue, 7969
<br /> Kiernan Avenue, 7971 Kiernan Av enue, 8001 Kiernan Avenue, 8313
<br /> Kiernan Avenue, 1051 Robert Avenue, and RC-1)a.
<br /> ECM sent VOC samples to TestAmerica Laboratory in Pleasanton, California for analysis
<br /> using either United States Environmental Protection Agency (USEPA) Method 8260B or
<br /> USEPA Method 524.2, as required by MRP R5-2014-0815.
<br /> In addition, ECM collected the folio wing MNA data in a ccordance with the Monitored
<br /> Natural Attenuation Work Plan (ECM, 2014):
<br /> • Between April 2 and June 18, 2015, EC M monitored and collected geochemical
<br /> samples from:
<br /> o Fifty-three (54) N estle mo nitoring wells (13 Upper Aq uifer w ells, 30
<br /> Intermediate Aquif er wells, and 11 Lower Aquifer wells) using low-flo w
<br /> purging techniques,
<br /> o Seventeen (17) N estle monitoring wells (1 Upper Aq uifer well, 15
<br /> Intermediate Aquifer wells, and 1 Lower Aquifer well) for compound-specific
<br /> isotope analysis (CSIA).
<br /> Geochemical samples were sent to TestAmerica Laboratory in Pleasanton, California and
<br /> analyzed for nitrate and sulfate (USEPA Met hod 300), sulfide (S M4500-S), ferrous iron
<br /> and dissolved manganese (USE PA Method 6010B), and me thane (RSK-175). CSIA-
<br /> carbon samples were sent to Microseeps /Pace Analytical Energy services, LLC for
<br /> measurement of stable isotope ratios with an isotope- ratio mass spectrometer (IRMS).
<br /> Microseeps/Pace also analyzed VOCs (USE PA Method 8260B) for the 17 CSI A-carbon
<br /> samples.
<br /> Figure 2 through Figure 4 depict the potentiometric su rface maps for the Uppe r,
<br /> Intermediate, and Lower aquifers. Table 1 through Table 4 present pertinent well
<br /> information, water level elevation, and water quality analytical data. Table 5 presents the
<br /> well purge parameters and laboratory results for geochemical analys is. Table 6
<br /> a The well at 415 Parallel Avenue was not sampled because there was no access to the property. The
<br /> property has been condemned by the Ci ty of Ri pon and ECM personnel confirmed the property was
<br /> unoccupied during the sampling period.
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