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I <br /> Mr Steve Schneider <br /> SJCPHS <br /> December 15, 1992 <br /> Page 2 <br /> A portion of each discrete soil sample was retained by the Groundwater Technology geologist for <br /> headspace analysis for volatile organic compounds (VOCs) using a photoionization detector (PID) <br /> If any discrete samples exhibited elevated PID headspace readings, indicative of VOC impacts, then the <br /> discrete sample was to be analyzed individually However, no elevated PID readings were detected in <br /> any of the sod samples collected <br /> The laboratory reports are included as Attachment A of this letter The attached table provides a <br /> summary of the results of sod sample analyses As shown by this table, none of the soil samples <br /> collected exhibited concentrations of TPH-as-Gasoline or BTEX above Method Detection Limits (MDLs) <br /> The MDL for TPH-as-Gasoline is 10 milligrams per kilogram (mg/kg) The MDL for BTEX is 0 005 mg/kg <br /> for benzene, 0 005 mg/kg for toluene, 0 005 mg/kg for ethylbenzene, and 0 015 mg/kg for total xylenes <br /> Concentrations of TPH-as-Diesel Fuel ranged from below the MDL (10 mg/kg) to 530 mg/kg Of the 26 <br /> sod samples analyzed, 8 samples, representing approximately 1,200 cubic yards of sod, were below the <br /> MDL for TPH-as-Diesel Fuel Eleven samples, representing approximately 1,700 cubic yards of sod, <br /> exhibited concentrations of TPH-as-Diesel Fuel from 10 to 50 mg/kg The remaining 7 samples, <br /> representing approximately 1,100 cubic yards of sod, exhibited concentrations above 50 mg/kg, but not <br /> exceeding 530 mg/kg Most of the samples exhibiting TPH-as-Diesel Fuel over 50 mg/kg were actually <br /> below 150 mg/kg with the exception of one sample (SP-5-2) <br /> i <br /> Recommendations regarding the disposition of stockpiled sods are being forwarded to SJCPHS and The <br /> California Regional Water Quality Control Board (RWQCB), Central Valley Region, under separate cover <br /> If you have any questions regarding the soil sampling, or the attached results, please call either Mr <br /> Dean Willis of O'Melveney & Myers at (213) 669-6000 or me at (510) 671-2387 <br /> Sincerely, <br /> GROUNDWA ER T OGY, INC <br /> Richard M Tho asser <br /> Project Manage <br /> Hydrogeologist <br /> Attachments <br /> cc Ms Elizabeth Thayer, RWQCB Central Valley Region <br /> Mr Dean Willis, O'Melveney & Myers <br /> Mr Larry Chapman, Manna Pro Corporation <br /> RTMPSPSR 7 <br /> GROUNDWATER <br /> TECHNOLOGY,INC <br />