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21119 76TH AVE Wuj RZARITTENHOUSE-ZEMAN & ASSOCIATES, INC. Geotechnical & Hydrogeological Consultants 1400 140th Avenue N.E. Bellevue, Washington 98005-4594 (206) 746-80201FAX(206) 746-6364 7 October 1988 Mr. Tom Strickland P.O. Box 338 Edmonds, Washington 98020 Subject: Subsurface Petroleum Hydrocarbon Evaluation Zelman's Texaco 212th Southwest and 76th Avenue West Edmonds, Washington Mr. Strickland: W-5834 T'his letter presents the results of our recent subsurface petroleum hydrocarbon evaluation at the above referenced site. Our work was accomplished on 27 September 1988 in general accordance with our proposal letter dated 22 September 1988. Verbal authorization to complete the work was provided by you at our site meeting on 19 September 1988. Our work has been performed in accordance with generally accepted geotechnical engineering and hydrogeologic practices for the exclusive use of Mr. Tom Strickland, the property owners and their agents for specific application to the above referenced site. Our originally proposed scope of work, outlined in our letter of 22 September 1988, was reviewed and approved by Mr. Craig Baker of the Washington State Department of Ecology (WDOE). The proposed scope consisted of advancing hollow -stem auger borings and obtaining soil samples at three locations. One boring was to be located at the south end of the excavation from which the leaking product line and associated tank were removed and two borings were to be completed along the south property line. The actual work completed consisted of one boring in the tank excavation and one boring along the south property line, adjacent to 212th Southwest. The approximate locations of the two completed borings are shown on Figure 1 and logs of the borings are presented as Figures and 3. 0 Mr. Tom Strickland W-5834 7 October 1988 Page 2 Boring B-1 encountered loose, fine to medium SAND backfill to a depth of approximately 12 feet below the existing ground surface. Below a depth of 12 feet, natural site soils consisted of dense to very dense, moist, gray, slightly silty, gravelly SAND to a depth of about 19 feet underlain by very dense, moist, gray, silty, gravelly SAND to the bottom of the boring at a depth of approximately 20 feet. Boring B-2 encountered loose, slightly silty, gravelly SAND fill to a depth of approximately 5 feet below the existing ground surface. The fill is underlain by very dense, moist, gray, slightly silty, gravelly SAND to a depth of about 19 feet and very dense, moist, gray, silty, gravelly SAND to the bottom of the exploration between a depth of approximately 19 to 20 feet. Head space measurements on collected soil samples were obtained using a Gastech 12' )8 Combustible Gas Indicator (CGI). The head space measurements were obtained as the percent of the Lower Explosive Limit (LEL) of gasoline and were used as an indicator of petroleum hydrocarbons in the subsurface soils. Elevated (> 100 % LEL) concentrations of petroleum hydrocarbon vapors were observed in boring B-1 between a depth of about 5 to 18 feet below the ground surface. No free -phase petroleum hydrocarbons or sheen was observed in the soil samples. The CGI measurements decreased to 10% LEL at a depth of 20 feet in boring B-1. No free -phase petroleum hydrocarbons, sheen or elevated CGI measurements were observed in boring B-2. The natural site soils are interpreted to be of glacial origin and to have been glacially overconsolidated as evidenced by their high Standard Penetration Test (SPT) blowcounts. The borings were terminated at a depth of about 20 feet below the existing ground surface upon encountering the silty, gravelly SAND at that depth. The silty, gravelly SAND is interpreted to be glacial till and is much less permeable than the overlying slightly silty, gravelly SAND. In the Puget Sound lowland, depending on the season and precipitation perched groundwater conditions can develop above the upper contact of glacial till, which typically acts as an aquitard. No perched groundwater was encountered within our borings. According to Newcomb (1952), in the vicinity of the site, deeper groundwater occurs below the till at a depth of about 130 feet below the ground surface. Penetrating the till aquitard and drilling to the deeper groundwater was not recommended because, in our opinion, it is unlikely leaked product would permeate through the till, and the bore hole could allow cross contamination at the lower aquifer if fugitive product should find its way down the drilled hole. Mr. Tom Strickland W-5834 7 October 1988 Page 3 In the Puget Sound lowland, the elevation of shallow groundwater perched on till is known to fluctuate depending upon the time of year and amount of precipitation. In the past year, below normal levels of precipitation recorded in the region may account for the lack of perched groundwater being encountered beneath the site. Monitoring wells were installed in the borings to aHow future monitoring of the groundwater should it accumulate during the wet, winter months. Upon discussions with Mr. Craig Baker of )VDOE at the time we accomplished our work, it was decided to limit our scope of work to two borings. Although elevated petroleum hydrocarbon vapors were recorded in portions of boring B-1, the drilling and soil sampling program failed to encounter an oily sheen on soil or free -phase product which would indicate the recent passing of a large gasoline plume. We appreciate the opportunity to be of service to you on this project. If you have any questions regarding this letter please do not hesitate to call. Respectfully submitted, RIT'FENHOUSE-ZEMAN & ASSOCIATES bnciosure: rigure i Figure 2 Figure 3 Lu w cc co C.j 04 0 ZELIVIANS TEXACO 0 76th. AVENUE W. r-- — — —1 1 B-1 TANK EXCAVATION DRAIN B-2 RENTAL TRUCK PARKING ALLEY Zl> 7-11 STORE PARKING LOT EXPLANATION B-2 INDICATES BORING NUMBER AND APPROXIMATE LOCATION ZELIVIANS TEXACO SITE & EXPLORATION PLAN FIGURE 1 RITTENHOUSE-ZENIAN & RZA W.O. W-5834 ASSOCIATES, INC. Geolechnical & Hydrogeological lwmkqm Nft JNS BY Consultants DATE SEPT 1988 1400 140th Avenue N'. E. SCALE N.T.S. Bellevue, IVA 98005 R TTENIIOLISE-ZEMA& ASSOC., INC. y Geolechnicid / If drogeological Considtants z W W W W SOIL DESCRIPTION Q. < W W -A 0-6--- Q 5 BORING NUMBIPI-' W.O. W-5834 PROJECT NAME Zelman-s Texaco STANDARD PENETRATION RESISTANCE z 0 73 Z o: A BLOWS PER FOOT IL =) W 0 (140 Ib. hammer, 30 Inch drop) 1 Io 10 20 30 40 50 0 very loose to loose, moist,' gray, fine to medium SAND with petroleum hydrocarbon odor (FILL) 2 '1 ---- T, -5 -- 100 21 -10 Dense to very dense, moist, gray, slightly silty, gravelly SAND with petroleum hydrocarbon odor 100 31 4T 100 5M Very dense, moist, gray, silty, gravelly SAND -20 10 G= ---A Bottom of boring at 20.3 feet - Completed 27September 1988 -25 130 -35 140 SAMPLING :E 2' OD SPLIT SPOON SAMPLE 3' OD SHELBY SAMPLE 2.5' ID RING SAMPLE B BULK SAMPLE * SAMPLE NOT RECOVERED GROUND WATER � SEAL DATE WATER LEVEL AT TIME OF DRILLING ATD OBSERVATION WELL TIP #8 GRANULAR ii SANDPACK LABORATOHY 9 % WATER CONTENT NP NON PLASTIC LIQUID LIMIT NATURAL WATER 2PLASTIC LIMIT CONTENT 50/ 5" 52 ,50/ 3" RZA -W 9N� W, , . u R TTE-NIIOLISE-ZEAI*& ASSOC., INC. 5R= .R— Get)technical / Ilydrogeological Consultayits z W W !�' Ui SOIL DESCRIPTION am_ X C) D 0. uj Lu f�--A -4Z—f—a Plauntinn AnnmviMFktA1V FAPt in M BORING NUMBO-1--2 W.O. W-5834 PROJECT NAME Zelman's Texaco (9 1 1 STANDARD PENETRATION RESISTANCE z z BLOWS PER FOOT D W 2 0 (140 1b. hammer, 30 inch drop) 0 0 10 20 30 40 50 Loose, moist, brown, slightly silty, gravelly SAND 0 0 7, 7/ 5 ...... Very dense, moist, gray, slightly silty, gravelly SAND 3 21 -10 ... . ......... 2 31 -'.f- -15 3 4= t'. Very dense, moist, gray, silty, gravelly SAND -20 2 S= Bottom of boring at 20.3 feet Completed 27 September 1988 — - ----- -25 -30 -35 40 SAMPLING 1 2' OD SPLIT SPOON SAMPLE 3- OD SHELBY SAMPLE 2.5* ID RING SAMPLE B BULK SAMPLE * SAMPLE NOT RECOVERED GROUND WATER E] SEAL DATE WATER LEVEL —2-- AT TIME OF DRILLING ATD ' ] OBSERVATION #8 GRANULAR . ;f WELL TIP SANDPACK LABORATORY TESTS * % WATER CONTENT NP NON PLASTIC LIQUID LIMIT bt-- NATURAL WATER ZPLASTIC LIMIT CONTENT 4 u (s 41IF--. 7 LA - cz� L k�.J U T_Q�,�j /A.AL'Cr /J4-7z� 0op C\� pWOZ>,�> At. Q61 06/12/89 11:59 State of Waahington Department of Ec Ql.ogy _Iwo Location: Department of ECology 4350 - 150th Ave. NE Redmond, WA 98052 FAX Numbff: (206) 867-70M VoIrce Number. (206) 867-7024 1). U. E. /N. W. RLU i Ul I Date: Time: C No. of Pages:__ Jull 1*t 1,%79%7 NOR M M ULM CM EOMONDS. FIREDEEL 06/12/89 11:59 D.O.E./N.W.REGION oUP- %J 8 A "Rf so... - I SV STATE OF WASHW.T(')N DEPARTMENT OF ECOLOGY, 41W. 150h .4ve ftedrrwind. Wo-OWWWrl March 3, 1989 Mr. Richard Slettvet 21027 Shell Valley Road Edmonds, WA 98020 Dear Mr. Slettvet: Reference is made to your letter of October 27, 1988 and your inquiry of February 12, 1989. on September 16, l9aa, we were called to the service station, operated by Gerald Fellman and owner by Mr. R.T. Strickland, located at 21125 - 76th West in Edmonds. We understand that some 4,000 gallons of gasoline were unaccounted for through inventory. on September 19, the tonage was uncovered through excavation to determine the cause of loss of product and attempt to locate the missing gasoline. The leak was found to be in the swing fitting to the turbine pump of one tank. Atter removing the tankage, explorative activities were bequn by digging in and around the tank bedding area. Vapors were evident but we encountered no free product. - To further explore the possible migration potential of the gasoline Rittenhouse - Zeman and Associates, a geotechnical firm was contracted and submitted a pldn for exploration. This plan was reviewed and approved by the Edmonds Fire Department and myself - on September 27, two hollow -stem augur borings were placed down -gradient of the spill area. Only low levels of petroleum product vapors were observed and measured in the borings which went to a depth of 20 feet. It was decided at that time to discontinue the exploration. our decision was based on the following factors. 1. Ground water levels are estimated to be at 130 feet in depth. 2. At 20 feet there is a layer. of glacial till which is less permeable, then the soils above this level. 3. To drill through this zone could allow for a conduit to ground water if free p?roduct exists. 4. No free product was encountered. :Mr. Richard Slettvst March 3,, 1989 .Page 2 S. Inventory records were not accurate to determine the exact amount of loss- 60 soils of the type encountered'could absorb and hold the product lost without migration off Site. It was concluded that the product is tied up in the soJJ3 which will biodegrade over time and not cause a problem for ground or surface waters. If there are further questionso please contact me at (206) 867-7016. Sincerely, 14 '� -0Z ,OAS, C Baker Spill Rasponse Manager Northwest Regional Office CS B: qM 0 REC E I V ED j.. JON 14 1989 THURSDAY . , OCTOBER 27, 1'968 EMONDS FIRE DEPT. North Tizi Waif BMtFIYI 0 Times North bureau Case of missing g6j"s Is c1fted state sa Vs: 0 EDMONDS An estimated 4,000 gall6ns of gasoline are still missing — but now the gasoline is also Dut- of mind, a state official said'L yesterday. . "It's over, as far as we'ret concemed," said Craig Baker, spill -response manager for the Pe ment of Ebolog rMployees at Jerry s Ser4- vice Station, 21126 76th Ave. W., discovered the spill Sept. 6. when one of the station's un. derground tanks went dry. .- Tests done at the expense of the landowner determined the gasoline hasn't seeped into a drinking water source or - ', storm -drain or sewer systems, -where it could be a fire danger.. Baker said the gasoline -. - I probably either sank very deep,, into sandy soil or was absorbed, into the soil. Either way, he said, it's hi&hly. unlikely to cause a problem. . - - . The spill occurred becaute an underground rubber hose burst a problem that caused a Sim ar s ill that resulted in. a iF 1977 fire inp King County. %; i It I W-ft rff- RITTENHOUSE-ZEMAN &ASSOCIATES, INC. JALffJA WIff 10 Mar" Geotechnical & Hydrogeological Consultants 1400 140th Avenue N.E. Now-= Bellevue, Washington 98005-4594 1 (206) 746-80201FAX(206) 746-6364 7 October 1988 Mr. Tom Strickland P.O. Box 338 Edmonds, Washington 98020 RECEIVED JUN 14 1989 EDMONDS FIRE DEPT. Subject: Subsurface Petroleum Hydrocarbon Evaluation Zelman's Texaco 212th Southwest and 76th Avenue West Edmonds, Washington Mr. Strickland: W-5834 This letter presents the results of our recent subsurface petroleum hydrocarbon evaluation at the above referenced site. Our work was accomplished on 27 September 1988 in general accordance with our proposal letter dated 22 September 1988. Verbal authorization to complete the work was provided by you at our site meeting on 19 September 1988. Our work has been performed in accordance with generally accepted geotechnical engineering, and hydrogeologic practices for the exclusive use of Mr. Tom Strickland, the property owners and their agents for specific application to the above referenced site. Our originally proposed scope of work, outlined in our letter of 22 September 1988, was reviewed and approved by Mr. Craig Baker of the Washington State Department of Ecology (WDOE). The proposed scope consisted of advancing hollow -stem auger borings and obtaining soil samples at three locations. One boring was to be located at the south end of the excavation from which the leaking product line and associated tank were removed and two borings were to be completed along the south property line. The actual work completed consisted of one boring in the tank excavation and one boring along the south property line, adjacent to 212th Southwest. The approximate locations of the two completed borings are shown on Figure 1 and logs of the borings are presented as Figures 2 and 3. Mr. Tom Strickland W-5834 7 October 1988 Page 2 Boring B-1 encountered loose, fine to medium SAND backfill to a depthof approximately 12 feet below the existing ground surface. Below a depth of 12 feet, natural site soils consisted of dense to very dense, moist, gray, slightly silty, gravelly SAND to a depth of about 19 feet underlain by very dense, moist, gray, silty, gravelly SAND to the bottom of the boring at a depth of approximately 20 feet. Boring B-2 encountered loose, slightly silty, gravelly SAND fill to a depth of approximately 5 feet below the existing ground surface. The fill is'underlain by very dense, moist, gray, slightly silty, gravelly SAND to a depth of about 19 feet and very dense, moist, gray, silty, gravelly SAND to the bottom of the exploration between a depth of approximately 19 to 20 feet. Head space measurements on collected soil samples were obtained using a Gastech 12' )8 Combustible Gas Indicator (CGI). The bead space measurements were obtained as the percent of the Lower Explosive Limit (LEL) of gasoline and were used as an indicator of petroleum hydrocarbons in the subsurface soils. Elevated (> 100 % LEL) concentrations of petroleum hydrocarbon vapors were observed in boring B-1 between a depth of about 5 to 18 feet below the ground surface. No free -phase petroleum hydrocarbons or sheen was observed in the soil samples. The CGI measurements decreased to 10% LEL at a depth of 20 feet in boring B-1. No free -phase petroleum hydrocarbons, sheen or elevated CGI measurements were observed in boring B-2. The natural site soils. are interpreted to be of glacial origin and to have been glacially overconsolidated as evidenced by their high Standard Penetration Test (SPT) blowcounts The borings were terminated at a depth of about 20 feet below the existing ground surface upon encountering the silty, gravelly SAND at that depth. The silty, gravelly SAND is interpreted to be glacial till and is much less permeable than the overlying slightly silty, gravelly SAND. In the Puget Sound lowland, depending on the season and precipitation perched groundwater conditions can develop above the upper contact of glacial till, which typically acts as an aquitard. No perched groundwater was encountered within our, borings. According to Newcomb (1952), in the vicinity of the site, deeper groundwater occurs below the till at a depth of about 130 feet below the ground surface. Penetrating the till aquitard and drilling to the deeper groundwater was not recommended because, in our opinion, it is unlikely leaked product would permeate through the till, and the bore hole could allow cross contamination at the lower aquifer if fugitive product should find its way down the I drilled hole. RECEIVED JUN 141989 EDMONng FIRE DEPT. a Mr. Tom Strickland W-5834 7 October 1988 Page 3 In the Puget Sound lowland, the elevation of shallow groundwater perched on till is known to fluctuate depending upon the time of year and amount of precipitation. In the past year, below normal levels of precipitation recorded in the region may account for the lack of perched groundwater being encountered beneath the site. Monitoring wells were installed in the borings to allow future monitoring of the groundwater should it accumulate during the wet, winter months. Upon discussions with Mr. Craig Baker of WDOE at the time we accomplished our work, it was decided to limit our scope of work to two borings. Although elevated petroleum hydrocarbon vapors were recorded in portions of boring B-1, the drilling and soil sampling 0 program failed to encounter an oily sheen on soil or free -phase product which would indicate the recent passing of a large gasoline plume. We appreciate the opportunity to be of service to you on this project. If you have any questions regarding this letter please do not hesitate to call. Respectfully submitted, RITTENHOUSE-ZEMAN & ASSOCIATES J . Sondergaarfi S: rior EngineerVg Geologist Kurt W. Groesch, P.E. Associate Enclosure: Figure 1 Figure 2 C, Figure 3 GR C% QJ /0 _e i:r REC h1v ED jUN 141969 -EDMOt4n4; FIRE DEIXT* w w cli .r. N DRAIN —"' m 76th. AVENUE W. ZELIVIANS TEXACO j& B EXCAVATION RENTAL TRUCK PARKING ALLEY Zl> 7-11 STORE PARKING LOT EXPLANATION B-2 INDICATES BORING NUMBER AND APPROXIMATE LOCATION ZELIVIANS TEXACO SITE & EXPLORATION PLAN FIGURE 1 RITTENHOUSE-ZEMAN & RZA W.O. W-5834 ASSOCIATES, INC. BY JNS Geotechnical & Hydrogeological DATE SEPT 1988 Consultants 1400 140th Avenue N. E. SCALE N.T.S. Bellevue. 11A 98005 Z.Af=mmm RECEIVED JUN 14 1989 EDMOND9 FIRE DEPT6 R17TENHOUSE-ZEATAN &ASSOC., INC BORING NUMBER B-1 W.O. W-5834 Geolechiiical / Hydrogeological Co)isidlaids* PROJECT NAME zel man's Texaco z W W W � 0 LL W L,) STANDARD PENETRATION RESISTANCE SOIL DESCRIPTION cc W 3 5 C) z tr =) uj A, BLOWS PER FOOT (n aR EL — M 0 (140 lb. hammer, 30 Inch drop) Ground Surface Elevation Approximately Feet < W W M < (n 0 10 20 30 40 50 Very loose to loose, moist,' gray, fine to medium SAND with petroleum hydrocarbon odor (FILL) 2 100 2 -10 Dense to very dense, moist, gray, slightly silty, gravelly SA14D with petroleum hydrocarbon odor 100 31 15 Ik50/ 5" k52 100 5M Very dense., moist, gray, silty, gravelly SAND -20 10 Ak50/ 3" Bottom of boring at 20.3 feet Completed 27 September 1988 -25 -30 -35 40 SAMPLING GROUND WATER SEAL LABORATORY TESTS 1 2* OD SPLIT SPOON SAMPLE 0 %*VVATER CONTENT ]r 3' OD SHELBY SAMPLE DATE Np NON PLASTIC ,',9 2.5" ID RING SAMPLE WATER LEVEL V - i 0 — LIOUID LIMIT B BULK SAMPLE AT TIME OF DRILLING ATD OBSERVATION NATURAL WATER #8 GRANULAR fl WELL TIP CONTENT /PLASTIC * SAMPLE NOT RECOVERED SANDPACK LIMIT � t' VA RITTENHOUSE-ZEMAN & ASSOC., INC. Geolechnic(d / Ilydrogeological Consultants z W W Ui FDCC- SOIL DESCRIPTION 0 0 < W W BORING NUMBER B-2 W.O. W-5834 PROJECT NAME Zelman's Texaco (D I I STANDARD PENETRATION RESISTANCE z zi z A& BLOWS PER FOOT =) uj 0 F- (140 lb. hammer, 30 Inch drop) < C, < V) 0 �: 0 10 20 30 40 50 0 NMZM=I= Loose, moist, brown, slightly silty, gravelly SAND 0 -5 Very dense, moist, gray, sliglitly silty, gravelly - SAND 3 21 -10 2 31 -15 3 4 Very dense, moist, gray, silty, gravelly SAND -20 2 5- --d Bottom of boring at 20.3 feet Completed 27 September 1988 -25 -30 -35 140 SAMPLING 2' OD SPLIT SPOON SAMPLE T OD SHELBY SAMPLE 2 S 2.5' ID PING SAMPLE B BULK SAMPLE * SAMPLE NOT RECOVERED GROUND WATER SEAL DATE WATER LEVEL V AT TIME OF DRILLING ATD ' OBSERVATION #8 GRANULAR WELL TIP SANDPACK LABORATORY TESTS 0 % WATER CONTENT NP NON PLASTIC i 0 — LIQUID LIMIT "—NATURAL WATER /PLASTIC LIMIT CONTENT RECLiVED JUN 141989 WMONDS FIRE DEPT. LAKE SHORE INVESTMENT CORPORATION P. 0. BOX 338 EDMONDS, WASHINGTDN 96020 22 September 1988 Mr. Craig S. Baker Department of Ecology State of Washington 4350 150th Ave. NE Redmond, WA 98052 RE: Gasoline Spill, 21125 76th W, Edmonds, WA 98020 Dear Mr. Baker: As agent for a co-owner of the above referenced service station, on September 9, 1988, 1 was notified of a possible gasoline spill by William A. Wilson, attorney, representing the tenant -operator, Gerald Zellman. The sp * ill was alleged to have occurred over the Labor Day weekend. Mr. Wilson notified the U.S. Environmental Protection Agency by letter September 9, 1988.. On September 9 1988, 1 visited the site and observed a ruptured flex hose connection. Immediately, I contacted Rittenhouse -Zeman & Associates,, Inc., and arranged to meet them at the site the following Monday, September 12, 1988. We decided to remove the underground storage tanks, and endeavor to locate the lost product. I subsequently contacted O'Sullivan Construction Co. to make arrangements for excavation of the site September 19, 1988. As you were present on September 19, 1988, you are aware of the outcome of the tank excavation, and you viewed the ruptured flex hose connection. Gerald Zellman, has reconciled his loss to be 4129 gallons of gasoline. We.do, not know how Mr. Zellman determined this amount as he informed us.he does not maintain inventory records. We propose to retain Rittenhouse -Zeman to assess and mitigate environmental damage. Immediately, with your approval, the tank excavation site will be capped with asphalt to prevent rainwater from entering the tank bed. Borings, as recommended by Rittenhouse -Zeman, will be made to ascertain the location of the product, whether it is migrating, and endeavor to recover it. IRECL IV ED SEP 2 6 1988 EDMOND-3 FIRE-' D,-7p-r. -W *- - Page 2 mr. Craig S. Baker 22 September 1988 Please be assured we are fully prepared to cooperate with the Department of Ecology mitigating this accident. Rittenhouse - Zeman will be contacting you with their technical proposal for approval. Sincerel��,, R.T. Strickland CC Robert B. Porterfield CHRISTINE 0. GREGORE D!rector A C Ell- aa 3 STATE OF WASHINGTON . DEPARTMENT OF ECOLOGY 4350-150th Ave. N.E. * Redmond, Washington 98052-5301 e (206) 867-7000 September 20, 1988 Ms. Jeannine Graf Building Department City of Edmonds 250 5th Ave. North Edmonds, WA 98020 Dear Ms. Graf: Reference is made to the property located at the northeast corner of the Puget Drive and Olympic View in Edmonds. The property in question is owned and being developed by Mr. Tom Strickland of Lakeshore Investments. There is a question regarding hydrocarbon contamination on the site. Mr. Strickland has furnished this department with analytical data from s ' ix sample locations on the site. Upon review of the data, it appears that there should not be a problem with continuing construction. The levels of hydrocarbon, benzene, toluene and xylene are acceptable. The sample locations are adequate to represent the soil profiles. A site ' evaluation was conducted on September 20th to verify others observations. It is therefore recommended that the building restriction.be lifted. If there are questions, please contact me at (206) 867-7016. Sincerelyf Crai Baker SpiglResponse Coordinator CB: cd I cc: Jack D. Weinz STA CHRISTINE 0. GREGOIRE Director . is 9 STATE OF WASHINGTON DEPARTMENT OF ECOLOGY 4350-150th Ave. N.E. e Redmond, Wa5hington 98052-5301 * (206) 867-7000 September 20, 1988 Mr. Tom Strickland Lakeshore Investments P.O. Box 338 Edmonds, Washington 98020 Dear Mr. Strickland: Reference is made to your property located at 21125 - 76th Avenue West in Edmonds and the release of the reported 3,500 gallons of gasoline from the turbine pump to soils around the tankage. It is apparent, after the exploration on the 20th, that recovery is going to be difficult. The delay in reporting and subsequent action has allowed the product to escape control. It will be unlikely that any free product will be found and recovered, but an effort will be made to do so. To thks end, it is recommended that, through your consultant, you draft a plan to ascertain the path of migration from the release site to wherever it is at this time. We want to know where it is and in what form; vapor or liquid. This is significant in terms of public safety and for possible groundwater contamination. It is therefore requested that the exploration plan and spill report be submitted to this office no later than �eptember 23, 1988. If there are questions, please contact me at (206) 867-7016. Sincerely Craigil Baker Spill Response Coordinator Environmental Quality CSB: gm cc: Jack D. Weinz, City of Edmonds RECL!V ED SEP 2 3 1988 'EDMONDS FIRS DEPT. 11Q_Mr#� 3 RZA RITTENHOUSE-ZEMAN & ASSOCIATES, INC. Geotechnical & Hydrogeological Consultants 1400 140th Avenue N. E. Bellevue, Washingron 98005 (206) 746-8020 R _L 22 Sept -ember 1988 SEP 2 3 1988 W-5834 DEPARTMENT04: NIORTHk,�IEST R'E-(1:.1iuIo Mr. Tom Strickland P.O. Box 338 Edmonds, Washington 98020 Subject: Proposed Test Borings Zelman's Texaco 212th S.W. and 76th Avenue W. Edmonds, Washington Mr. Strickland: As requested, we have prepared this letter outlining our proposed scope of work and boring locations for completing a subsurface petroleum hydrocarbon evaluation at the above referenced site. As discussed with you, we will forward a copy of this letter to Mr. Craig Baker of the Washington State Department of Ecology (WDOE) for his review and approval of the exploration program. We were present on site with you and Mr. Baker on 19 September 1988 when the underground storage tanks at the site were removed. We understand the tank removal was instigated by a leak in one of the turbine pump feeder lines which released an estimated 3,500 gallons of produce into the subsurfa ce environment. We observed the removal of four underground storage tanks; three from one excavation and one from another. The leak of product reportedly occurred in the excavation containing multiple tanks. We observed no product or odor in the excavation containing the single tank. Upon removal of the three tanks from the excavation and digging into the soils located beneath the middle and western -most tanks, strong petroleum hydrocarbon odors were noted. At this point, the hoe had excavated to a depth of approximately 9 0 Mr. Tom Strickland/Zelman's Texaco 22 September 1988 W-5834 Page 2 14 feet below the existing ground surface, which was the limit of the equipment without enlarging the excavation. No free product was observed to the depths explored in the bottom of this excavation. In an effort to determine the extent of product migration, Mr. Baker requested the completion of three test borings. Based on the observed site topography, it appears that surface water and shal low groundwater would migrate from the tank excavation to the southeast towards 212th Street Southwest. Mr. Baker has requested that one boring be completed within the excavation at which the leak occurred. We propose to locate the other two borings southeast of that excavation, close to the south property line at the approximate locations shown on the attached Figure. The two borings would be located in the apparent downgradient direction from the site of the leak. They would also be located near the south property line, along 212th Street Southwest, in an attempt to determine the maximum extent of product migration without drilling outside of the property limits. We propose to complete the borings to the top of the Vashon till , which is mapped (Newcomb, 1952) as existing at shallow depth beneath the site and is known to occur at shallow depths at Edmonds High School (RZA, 1987) just southwest of the site. We estimate that the till should be encountered within a depth of less than 30 feet below the existing ground surface. If perched groundwater is encountered above the till , we will install 2-inch diameter monitoring wells within the borings. The monitoring wells would be constructed in general accordance with the Minimum Standards for Construction and Maintenance of Wells, WAC 173-160-510. Soil samples will be obtained at 2-1/2- or 5-foot depth intervals using Standard Penetration Test procedures. Samplers will be decontaminated with potable water and detergent between each sample interval and the auger, rods and sampler steam cleaned between each boring. Head space measurements using a Gastech CGI meter will be obtained on all soil samples collected. We have tentatively scheduled a drill rig to begin work on Tuesday, 27 September 1988. 0 0 Mr. Tom Strickland/Zelman's Texaco 22 September 1988 W-5834 Page 3 We appreciate the opportunity to be of service to you on the project. If you have any questions regarding this letter, please do not hesitate to call. Respectfully submitted, RITTENHOUSE-ZEMAN & ASSOCIATES, INC. _�' '�'&c O'� / Jt N. Sonde,/gaard S n ior Engineering Geologist Kurt W. Groesch, P.E. Associate Enclosure: Figure - Proposed Boring Locations cc: Mr. Craig Baker, WDOE GR? C' VIASH/,�-. * 15X' 76th. AVENUE W. ZELMAN'S 7 . —11 TEXACO STORE i I r----- —i co w PARKING LOT co "—TANK EXCAVATION cy RENTAL TRUCK PARKING cli ALLEY POSED BORINGS PROPOSED BORING LOCATION PLAN RITTENHOUSE-ZEMAN & RZA W.O. W-5834 ASSOCIATES, INC. BY JNS Geotechnical & Hydrogeological DATE SEPT JkU Consultants 1400 140th Avenue N. E. SCALE Bellevue, WA 98005 —N.T.S. —lk* N CIO C-p -JS -7 \6n, A A 4f -L -v- 77 CQ c C.00 "CA :SL-�% 0— ps ZR, z IT 7 C o tA sA�k A- cs o 'e,, -s L cw G -.1 '04. Ck 'C k—n v 14 4 C� dw4c,�*,d .4o& 44 eV 96 7 7000 F ul. -A 'In le- dA.) CA ho pi o e: /H*- A-A� A eZ- � A -5 )e A A UA '744 e 1," 4 /.f, 0 0 Al s o C,,7 QEO 4-� S, P. N AA c,� -7-00 —4! S% c, A as dvs I c - 0 Lo 6-a Jl-, 0. Gn *-"c t., A -in LD R ,kt- u,� N 4�-o (4 s- - � f, V.- 0 �j a- � T NIL 4-AA&*- \1 — qz� � C., --) c -S q�zc— ce �- � -C� ecr- U',-A 416 At.. 14 to Ock ewic% t wws. bck%j (law evi> arp-jcA 6-o�l= Ab 0 , --) Q "..) kvo, P\ � (.e- t 6 s,.�" ' RAL ILIN U\ I-) or7 - 7 L 4r,> t,!-, s-* s i-.> OAC. <,L. AA- pal., IL -bPUL*4 -,t- A �- Ar�l a �.g 4, e--% 4 $Z-�>Ca A I/ A 0 W, X",M: i �A � - T��l - -� o oc) Q-J 0 0 'v% A. k A - 6 r, s lkll� c 1�1 kle- S. ko ec, a r- /Xuc,�- 44- P"14;—& po�j .4 Vt'c 64.0, (, ,�Iet C;i S-- ��K646 ae� C�C�,s S7 Afle X46--,7-5::J�-, —ti5la on, j �b Tpel � tb f 6L —7-g-b(m �, 4-7,A t to sl�- 7;�, / - A n I...) 4-�k A- k.) IS& - VA-bcf�� 't \� -(,s Spdcc" 0, r:. �Z- E ir-K /420- L4- � �- &n — cA ix -C Z..) 6- i,.,j s I , ..) d Ls o dr LZ w fZ4 "VO, (Dj ss Iv"i a, V.6-,t- 0 0 57- -awis o oc Ais- ,no PA) �S�c u z !E� CFES (�A lk� tz, Kopc!�(A CL -�L -:)L7� -'W� l3ou clep �*_- Is ae�ov-� w %>4 s j t. RZA VW, 'm RITTENHOUSE-ZEMAN & ASSOCIATES, INC. -2 si Geolechnical & Hydrogeological Consultants 1400 140ih Avenue N. E. R ff Bellevue, Washington 98005 (206) 746-8020 SEP 2,91988 22 Sep%L-,ember 1988 W-5834 DEPART�ZIEk," Mr. Tom Strickland P.O. Box 338 Edmonds, Washington 98020 Subject: Proposed Test Borings Zelman's Texaco 212th S.W. and 76th Avenue W. Edmonds, Washington Mr. Strickland: As requested, we have prepared this letter outlining our proposed scope of work and boring locations for completing a subsurface petroleum hydrocarbon evaluation at the above referenced site. As discussed with you, we will forward a copy of thi s 1 etter to Mr., Crai g Baker of the Washi ngton State Department of Ecol ogy (WDOE) for his review and approval of the exploration program. We were present on site with you and Mr. Baker on 19 September 1988 when the underground storage tanks at the site were removed. We understand the tank removal was instigated by a leak in one of the turbine pump feeder lines which released an estimated 3,500 gallons of produce into the subsurfa ce environment. We observed the removal of four underground storage tanks; three from one excavation and one from another. The leak of product reportedly occurred in the excavation containing multiple tanks. We observed no product or odor in the excavation containing the single tank. Upon removal of the three tanks from the excavation and digging into the soils located beneath the middle and western -most tanks, strong petroleum hydrocarbon odors were noted. At this point, the hoe had excavated to a depth of approximately Mr. Tom Strickland/Zelman's Texaco 22 September 1988 W-5834 Page 2 14 feet below the existing ground surface, which was the limit of the equipment without enlarging the excavation. No free product was observed to the depths explored in the bottom of this excavation. In an effort to determine the extent of product migration, Mr. Baker requested the completion of three test borings. Based on the observed site topography, it appears that surface water and shallow groundwater would migrate from the tank excavation to the southeast towards 212th Street Southwest. Mr. Baker has requested that one boring be completed within the excavation at which the leak occurred. We propose to locate the other two borings southeast of that excavation, close to the south property line at the approximate locations shown on the attached Figure. The two borings would be located in the apparent downgradient direction from the site of the leak. They would also be located near the south property line, along 212th Street Southwest, in an attempt to determine the maximum extent of product migration without drilling outside of the property limits. We propose to complete the borings to the top of the Vashon till , which is mapped (Newcomb,,1952) as existing at shallow depth beneath the site and is known to occur at shallow depths at Edmonds High School (RZA, 1987) just southwest of the site. We estimate that the till should be encountered within a depth of less than 30 feet below the existing ground surface. If perched groundwater is encountered above the till , we will install 2-inch diameter monitoring wells within the borings. The monitoring wells would be constructed in general accordance with the Minimum Standards for Construction and Maintenance of Wells, WAC 173-160-510. Soil samples will be obtained at 2-1/2- or 5-foot depth intervals using Standard Penetration Test procedures. Samplers will be decontaminated with potable water and detergent between each sample interval and the auger, rods and sampler steam cleaned between each boring. Head space measurements using a Gastech CGI meter will be obtained on all soil samples collected. We have tentatively scheduled a drill rig to begin work on Tuesday, 27 September 1988. 0 Mr. Tom Strickland/Zelman's Texaco 22 September 1988 W-5834 Page 3 We appreciate the opportunity to be of service to you on the project. If you have any questions regarding this letter, please do not hesitate to call. Respectfully submitted, RITTENHOUSE-ZEMAN & ASSOCIATES, INC. Jt N. Sondel/gaard S n ior Engineering Geologist C;R VIAS1141. N"r LEJ Kurt W. Groesch, P.E. Associate Enclosure; Figure - Proposed Boring Locations c: Mr. Craig Baker, WDOE 76th. AVENUE W. ZELMAN'S TEXACO 0 co "—TANK EXCAVATION cy RENTAL TRUCK PARKING ALLEY 0 7-11 STORE PARKING LOT POSED BORINGS PROPOSED BORING LOCATION PLAN RITTENHOUSE-ZEMAN& IFIZA' W.O. W-5834 — ASSOCIATES, IATC. BY JNS Geotechnical & Hydrogeological Consultants IV I" LQ DATE — SEPT 198 1400 140th Avenue N. E. SCALE _ N.T.S. — Bellevue, IVA 98005 SEP 23 '88 09:46 R�iIHIER &'illk' 026 P. I LAKE BHORE INVESTMENT CORPORATION P. 0. BOX 336 EDMONDS, WASH INGTON'9 130293 22 September 1988 Mr. Craig S. Baker Department of Ecology State of Washington 4350 150th Ave. NE Redmond, WA 98052 RE., Gasoline Spill, 21125 76th Wj Edmonds, WA 98020 Dear Nr - Baker: As agent for a co-owner of the above referenced'service station on September 9, 1988r I was notified of a possible gasoline spil'l by William A. Wilson, attorney, representing the tenant -operator, Gerald Zellman. The Spill was alleged to have occurred over the Labor Day weekend. Mr. Wilson notified the U.S. Environmental Protection Agency by letter September 9, 1988. On September 9, 1988, 1 visited the site and observed a ruptured flex hose connection. Immediately, I contacted Rittenhouse -Zeman & Associates, Inc., and arranged to meet them at the site the following Monday, September 12, 1988. We decided to remove the underground storage tanks, and endeavor to locate the lost product. I subsequently contacted'O'Sullivan Construction Co. to make arrangements for excavation of the site September 19, 1988. As you were present on September 19, i9n, you are aware of the outcome of the tank excavation, and you viewed the ruptured fie,-. hose connection. Gerald Zellman, has reconciled his loss to be 4129 gallons of gasoline. We do not know how Mr. Zellman determined this amount as he informed us he does not 'maintain inVtntory rPr.nrr1r,, We propose to retain Rittenhouse -Zeman to assess and mitigate environmental damage. Immediately, with your approval, the tank excavation site will be capped with asphalt to prevent rainwater from entering the tank bed. Borings, as recommended by Rittenhnusp_-Zeman, will be made to ascertaill tile location of the product, whether it is migrating, and endeavor to recover it. SEP 23 '68 09:47 RAINIER BANK 02G P.2 a PAGP ?. Mr. Craig S. Baker 22 September 1988 Please be assured * fully.prepared to cooperate with the Department o we are f Ecology mitigating this accident. Rittenhouse - Zeman will be contacting you with their technical proposal for approval. Sincerely, A.T. Strickland CC Robert B. Porterfield