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Page 1 of 3 <br /> Angelica Sandoval Marin [EH] <br /> From: Barton, Jim@Waterboards Dim,barton@waterboards.ca.gov] <br /> Sent: Monday, December 30, 2013 2:11 PM <br /> To: Silva, Larry <br /> Cc: Angelica Sandoval Marin [EH] <br /> Subject: RE: 4315 Waterloo Road and 1267 Country Club <br /> Hi Larry, <br /> I spoke with Megan Tonkin at our contract lab Exelchem Environmental Labs in Rocklin. Megan said that if you <br /> specify a low level extraction for the analysis, they can reach the necessary MDL for all of the metals. There are <br /> also drinking water methods (200.8)which can be run for waste water if the samples are not too dirty(dilution <br /> raises the MDLs). I suggest you talk to your lab about the low level extraction (requires more sample volume). <br /> Thanks. <br /> Jim Barton <br /> James L. L. Barton P. G. <br /> Central Valley Regional Water Quality Control Board <br /> 11020 Sun Center Drive, #200 <br /> Rancho Cordova, CA 95670-6114 <br /> Office (916)464-4615 <br /> Fax (916) 464-4645 <br /> From: Silva, Larry [mailto:lsilva@craworld.com] <br /> Sent: Monday, December 30, 2013 1:24 PM <br /> To: Barton, Jim@Waterboards <br /> Cc: Angelica Sandoval Marin [EH] <br /> Subject: RE: 4315 Waterloo Road and 1267 Country Club <br /> Mr. Barton, <br /> I want to confirm that the SWRCB water quality objectives for metals your referring to in your attached email <br /> are the California Department of Public Health, Primary MCL numbers. <br /> If that is the case, analytical methods 6010/6020 will be sufficiently low for comparison for the metals listed <br /> below. <br /> Constituent MCL <br /> Arsenic (10µg/L) <br /> Cadmium (5 µg/L) <br /> Lead (15 µg/L) <br /> Mercury (2 µg/L) <br /> Nickel (100µg/L) <br /> Selenium (50 trg/L) <br /> However, the detection limits for antimony and thallium using the 6000 series analytical method is 10µg/L <br /> which is slightly higher than the primary MCLS of 6 µg/L and 2 Itg/L, respectively. <br /> 1�iZnr�n i 2 <br />