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❑❑R <br /> GROUNDWATER <br /> [1001 TECHNOLOGY, INC. 140I Halyard Drive,Suite 140,West Sacramento,CA 95691,(916)3724700 <br /> FAX(916)372-8781 <br /> December 6, 1991 Project No. 02320 1837 <br /> Mr. Patrick Brown <br /> District Plant Engineer <br /> United Parcel Service �°�' �� �r <br /> errs <br /> 1380 Shore Street *r E <br /> West Sacramento, CA 95691 ,SAN 14 1992 <br /> RE: SOIL EXCAVATION AND SAMPLING ENVIRONMENTAL HEALTH <br /> UNITED PARCEL SERVICE FACILITY PERMIT/SERVICES <br /> 1532 NORTH BROADWAY <br /> STOCKTON, CALIFORNIA <br /> Dear Mr. Brown: <br /> Groundwater Technology, Inc. presents this letter to transmit the results of soil sampling during the <br /> removal of an underground waste oil tank and an underground unleaded gasoline storage tank and <br /> subsequent over-excavation performed at the United Parcel Service (UPS) facility in Stockton, <br /> California. Groundwater Technology was retained by UPS to observe the underground storage tanks <br /> and collect soil samples for laboratory analyses. A Site Location Map (Figure 1) and a Site Plan (Figure <br /> 2) are included in Attachment A. <br /> On August 30, 1991, Groundwater Technology collected 4 soil samples from the bottom and side <br /> walls of two open excavations and one soil sample from a soil stockpile on the subject property. <br /> Figures 2, 3, and 4 show the sample designations and locations (Attachment A). The samples were <br /> collected using a portable hand-operated impact sampler fitted with a 2-inch diameter by 6-inch long <br /> brass tube. Each sample was subsequently screened for volatile organic hydrocarbons using a photo- <br /> ionization detector (PID),then sealed, labeled, and placed on ice for transported under chain-of-custody <br /> for analyses at West Laboratories in Davis, California or Coast-to-Coast Analytical Services in San Luis <br /> Obispo, California. Soil samples were analyzed for the constituents listed in the following table: <br /> CONSTITUENT SAMPLE IDENTIFICATION <br /> W-1 SP-1 GG=1 GG=2 GG=3 <br /> BTEX X X X X X <br /> TPH-G - X X X X <br /> TPH-D X - - - <br /> TPH-Motor Oil X - - - <br /> Organic Lead - X X X X <br /> VOC X <br /> Semi-VOC X - - - - <br /> Total Lead X X X X X <br /> EDB - X X X X <br /> Hex. Chrome X - - - <br /> BTEX(benzene,toluene,ethylbenzene and xylenes) VOC (volatile organic compounds) <br /> TPH-G (total petroleum hydrocarbons-ss-gasoline) Semi-voc (semi-volatile organic compounds) <br /> TPH-D Itotal petroleum hydrocarbons-as-diesel) TAH-Motor Oil Itotal petroleum hydrocarbons-as-motor oill <br /> EDB (1,2-Dibromoelhene) - = Not Analyzed <br /> Offices throughout lief,U.S.,Canada and Overseas <br />