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Korbmacher Engineering, Inc. <br /> Gaouch nlcal Environmental MauHA Testing Spacial Inspection <br /> 400 Preston Court.5ulte B. LWermom CA 94551. PO Boz 405.LivarmoM CA 94551 925.454.9055.925.464-9504 CFax) <br /> 22 October 2014 <br /> Ms. Angelica Sandoval Marin, Senior REHS <br /> San Joaquin County, Environmental Health Department <br /> 1868 E. Hazelton Avenue, <br /> Stockton, California 95205 <br /> Subject: ResponseStation <br /> LetrDate 21 October 2014 <br /> For <br /> 2132 East Mariposa Road <br /> Stockton, California 95206 <br /> Ms. Angelica Sandoval Marin: <br /> As requested, this letter is to formalize the response to your letter regarding the subject site. <br /> Our response will coordinate according to your bullet items listed in your letter. <br /> • Depth to water table is 45 feet below existing grade. Our boring will extend only to 20 <br /> to 25 feet below existing grade. We should not be encountering groundwater. <br /> • If suspected impacted soil or groundwater is encountered. At the time of drilling,tthe PPE <br /> will be Level D. Should conditions change, all on-site personnel will be equipped <br /> with <br /> respiratory and organic filters when needed. <br /> • Field Technicians must be 40-Hour HAZWOPER. Field personnel are certified in 40-hour <br /> training. <br /> • All soil and groundwater must be properly containerized, labeled, stored and disposed. <br /> Should the material be impacted, all soil and water will be drummed, labeled, identified, <br /> sampled for analytical testing, stored on-site until proper disposal. Manifests will be <br /> maintained and copies submitted for your records. <br /> • The geotechnical boring shall be sealed from the bottom up to 6 inches bsg with neat <br /> cement. Water used for mixing the neat cement will be from potable water, not <br /> groundwater, and the boring will be backfilled with neat cement, and tremied if water is <br /> encountered. <br /> If you have questions, please contact me. <br /> Sincerely, <br /> KORB ENGINEE , INC. <br /> PE <br /> Bru r mach , <br />