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Page`i 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 /> i <br /> I <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 /> want to confirm that the SWRCB water quality objectives for metals your referringto 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 (5µg/L) <br /> Lead (15µg/L) <br /> Mercury (2µg/L) <br /> Nickel {100µg/L) <br /> Selenium (50µg/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 6µg/L and 2 Ag/L,.respectively. <br /> 12/30/2013 <br />