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Gabriel Gonzalez [EH] <br /> From: William Little <wlittle@advgeoenv.com> <br /> Sent: Wednesday,June 10, 2015 12:57 PM <br /> To: Gabriel Gonzalez [EH] <br /> Cc: Nuel Henderson [EH] <br /> Subject: RE: 500 E Louise Ave., Lathrop - sampling <br /> Mr. Gonzalez: <br /> The scope of work required will be the collection of two additional soil samples for analysis, from the <br /> current excavation floor. <br /> Soil will be manually excavated six inches with shovel or hand auger. Soil will then be manual <br /> collected within a six inch steel sleeve, through the use of soil sample hammer. The sleeve ends will <br /> be capped, sealed and sample labeled/preserved in an ice chest under ice and placed onto a chain of <br /> custody. McCampbell Analytical will likely be the laboratory for analysis. <br /> With procedures listed able, soil samples are required at the location 132-10' (10 feet) with analysis for <br /> EPA 8260; and an excavation floor sample collected at approximately five feet below surface grade at <br /> the lateral location of initial shallow soil sample WTP#3 with analysis for California Assessment <br /> Metals (CAM17) EPA 60106, EPA 7062 for antimony and arsenic, EPA 7131 for cadmium, EPA 7421 <br /> for lead, EPA 7471A for mercury, EPA 7521 for nickel, EPA for 7742 for selenium and EPA 7841 for <br /> thallium. <br /> AGE would recommend EPA method 6010 icp and 6020 ICP-MS for all the analytes and EPA <br /> 7471A for mercury. <br /> Nuel Henderson described these sample location and depths, as the letters requirements for closure. <br /> The excavation area will then be backfilled and compacted. The sampling is requested at the earliest <br /> opportunity. <br /> William Little <br /> California Professional Geologist #7473 <br /> Advanced GeoEnvironmental, Inc. <br /> Environmental • Industrial Hygiene • Geotechnical • Contracting <br /> Phone: 800-511-9300 <br /> Fax: 888-445-8786 <br /> wlittle(@advqeoenv.com <br /> www.advqeoenv.com <br /> This email/fax message is for the sole use of the intended recipient(s) and may contain confidential <br /> and privileged information. Any unauthorized review, use, disclosure or distribution of this email/fax is <br /> prohibited. If you are not the intended recipient, please contact the sender by email/fax and destroy <br /> all paper and electronic copies of the original message. <br /> From: Gabriel Gonzalez [EH] mailto: a onzalez s'cehd.com] <br /> Sent: Wednesday, June 10, 2015 10:06 AM <br /> To: William Little <br /> 1 <br />