Laserfiche WebLink
JOHNSTONE <br /> MOYER INC. (Y� <br /> PROFESSIONAL CONSTRUCTION SERVICES <br /> 555 Old County Road <br /> San Carlos,CA 94070 .J J <br /> T 650.570.6161 F 650.570.6144 <br /> www.johnstonemoyer.com v <br /> July 6th,2018 <br /> Eric Hanson/Ned Phillips <br /> Vice President of Construction/Director of Construction <br /> SummerHill Apartment Communities <br /> 3000 Executive Parkway, Suite 450 <br /> San Ramon, CA 94583 <br /> Re—SummerHill Proper , 1019 Rollins Road urlingame, CA(SMCo Case#660119/RO <br /> #2288)APN 026-240-370 <br /> Dear Mr. Hanson and Mr. Phillips; <br /> In response to the letter that Johnstone Moyer, Inc. received from the San Mateo County <br /> Groundwater Protection Program (GPP) dated Thursday, July 5th, 2018, JMI would like to <br /> address each of GPP's concerns. <br /> To date, JMI has not exported any soils from the Carolan Ave/Rollins Road site.As outlined in <br /> Rockridge Geotechnical's Final Geotechnical Investigation Report dated February,28th, 2014, all <br /> excavated soil has been stockpiled over the Southwestern two hundred fifty(250) feet of the <br /> townhome area in order to surcharge the underlying weak clay deposits. <br /> On April 5th,2018, ENGEO performed field sampling of insitu soils and were submitted under <br /> documented chain-of-custody to Torrent Laboratory, Inc., A State-certified laboratory in <br /> Milpitas, California for the following analyses: <br /> • Total petroleum hydrocarbons (TPH) as gasoline (EPA Method 8260/5035) <br /> • Volatile organic compounds (VOCs) (EPA Method 8260/5035) <br /> • TPH as diesel and motor oil w/silica gel cleanup (EPA Method 8015M) <br /> • CAM 17 Metals <br /> • Organochlorine Pesticides (EPA 8089) <br /> • Polychlorinated Biphenyls (EPA 8082) <br /> • SVOCs (SIM) <br /> SummerHill Apartment Communities was notified by ENGEO that fifty-two (52) chromium <br /> samples exhibited.concentrations in excess of 50 mg/kg,which is greater than ten(10)times the <br /> soluble threshold limit concentration(STLC),via ENGEO's April 25th,2018 Memorandum. Per <br /> ENGEO's recommendation, a Waste Extraction Test(WET) analysis to determine the disposal <br /> classification of the material was performed on all of the samples where the results were detected <br />