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EHSI 5-16-06 LETTER.pdfCITY copy ensib EHS-InternagtionaI, Inc. RESUB May 16,20W MAY 24 2006 �p�N �A IIYMOIV1*6V Mr. Brian Jold P.O. Box 12766 Mill Credr, WA 95012 Subject: Post-Mold Assessment RnMmft at 24M - 9e Ave. W, EdEmom* WA ERS1 Project 9113-01 bear Brian: On May 0, 2006, at the request ofhft. Brian Joki, a reprmseantative from EHS-lnteruationdl, Inc. (EHSI) conducted a post -mold remediation assossmeat in the private residence located at 24306 — 9e Avenue West, Edmonds, Washington. The post -mold remediation assesamcut included: a visual inspection of the residence; measuring the moisture content of previously affected building materials; and, the collection of several surface samples for a determination of settled fungal Conoentrations at the time of the assessment. Basad on the results from this assessment, EHS1 reeomme ds that the homeowner proceed with the elimination of source(s) of water intrusion and the replace of window frames and building materials with significant water damage. The results ofthe assessment are discussed below. B.tkgrou.a 4n November 22, 2005, EHS1 performed an initial mold and moisture amessment in the subject residence. At the time of the mold and moisture assessment the home had a very musty odor and visible mold growth was observed on many surfaces. Additionally, the residence had a number of meas with visibly water -damaged materials. It was noted at that time that upkeep of the resiience had bean neglected and gutter, downspouts, flashing and other water oontrol devises and featurm were absent or leo than efhective. Based on the results of the mold and moisture asap, EHS1 r000rmrrenAed that arms be taken to removelclean visible mold tom, the residence as well as eliminate source(s) of moil. The initial mold and moisture assessment suggested that most of the water intrusion was occurring through roof or envelope leaks. Wet indoor materials coupled with a lack of to rattuaa corAr+ols created a very high interior relative humidity that likely led too much of the observed mold growth. Niff4a"MAMON4 Im Jeri Ra*km -ftd Ram@dbAw ,Ax a na t EHSd Project 91 1341 Mey 16, 2wd Reported Infforsaattoa Mr. Joki reported that the City of Edmonds has restricted further actions at the residence, such as removal of windows and window fiames as well as the removal and replacement of deteriorated wood products, until he can provide assurances that moll remediation has been conducted and is complete. Mr. fold firmer reported that he intends to replace the roof and north wall of the residence. In addition, he reported that he intends to replace all windows and window frames as well as the floor in the first floor bathroom. Post Reniedlathm Asst The post -mold rernediation assessment was conducted ager menu with identified mold growth were reportedly removed and all areas cleaned using a vacutnstt equipped with a high efficiency particulate air (NEPA) filter. Typically, post -remediation assessments are conducted after removal of mold -affected materials, drying of all remaining building materials and elimination of soune(s) of wain intrusion. Vihaal Xnspeewn At the time of this assessment, all interior walls within the residence had bow moved (Photos 1 and 2). Moreover, the first floor ceiling was removed providing a clear line of site of the roof decking (Photo 3). While onsite, EHSI noted that the mold-aff6ded materials observed during the November 2005 assessment had been removed with the exception of window frames in the Living Room and both bedrooms (Photo 4). The window frames have some spotty brown mold growth on painted surfaces. A door in the northwest bedroom also had some brown spotty mold growth on painted surficxs. molsb" me"Urements The moisture content of building materials was determined using non -penetrating and penetrating Dr-EaA moisture meters. Typically, dimensional lumber has a moisture content of approximately 16 to 18%. On the day of the assessment, elevated moisture contents of up to 25% were identified in the roof decking along the north wall ofthe residence. Elevated moisture content was measurod on the underside of the roof deeldng to a distance of four -feet from the upper north wall (Photo 5). hoof decking, siding and the window frame in the southwest corner of the residence, Front Room, also had elevated moisture contem at the time of the assessment, with moisture contents up to 22% (Photo ,6). ffN"X*XAdP44 lee told Ra Wine -Post ftmedMM AMMoml ENSi Project 9113-01 May 16, 20% googol Sampang mW Laboratory Analysis Three surface tape lift samples were collected by Pressing transparent adhesive tape onto horizontal Sat strfitces these removing the tape and placing it into a pre -labeled, re -sealable beg. Samples were collected from the l':,.mving Room fireplace mantle, the light switch at the top of the stairs near the kitchen and from the windowsill on the east wail ofthe basement. All samples were submitted to Lab(Cor Laboratories of Seattle, WA. LaWCor is staffed by certified microbiologists and participates in the Amerman Industrial Hygiene Association's Envirorummtal Microbiology Proficiency Testing (AIHA EMPAT #k101858). The samples were trimfirivd to LaWCor Laboratories under chain -of custody camel. The laboratory analyzed the tape lift samples by staining theta in lactophcnol cotton blue and observing characteristic morphologies at several magnifications, The laboratory report is XamEted in Appendix A. In all cases the laboratory reported the presence of a few scattered spores of several mold types including Aspergiflu PenidIUw a -lice mold, Chaetomiium sp., Claaksrpvrium sp., Canoderma sp. and &gpuhvivpAs sp. The initial mold and moist= assessment conducted by EHSI was intended to determine the types and quantities of filamentous molds that may impact the health of some individuals. Filamentous molds are one of marry types of fimgrus. Assessments for filamentous mold do not also mchude an assessment for the fimpl. types responsible far "dry rot". While both "dry int" and flee mtous molds are fungi, in Washington State it is necessary to have a Structural Pest Inspector (SPI) license to report the presence of `dry rot". The presence of "dry rot" fangos, while not a health issue, may impair wood products to a point where safety issues become Luring time post-remadiation asses, the visual inspection $or filamentous mold indicated that all mold-affmtedmaterials, with the exception of some window frames and a door, have been reamoved Fromm the residence. The moistore meter assessment indicated that water intmion has not been totally eliminated and not all building materials have been. dried to a point where they do not have the potential to allow mold growth. It should be noted that the north side of the roof has a significant growth of moss (Photo ') and it is believed that wood along the north and of the roof may have suffered water damage. EHSI believes that the next step is to remove materials with water damage. The rtnuval of materials with water damage will also remove the materials with elevated moiamre content at the time of the post -remediation assessment. 4WwWWiM4 Inc JOU 1taWOM —Poet lmedildon AMMUMM EHSI Project 9113-01 May 16.2606 The presence of a few scattered spores, as reported by the laboratory, is not a cause lbr nonce m EHSI recommends that the homeowner continue with the replacoment of window frames and replacement of materials with wader damage. This past- ion asst was conducted by EHSI in accordaace with the scope of work provided in EHSI Proposal 06-077. EHSI lol6owed currently armed industrial hygiene prmdkM mcluding professional opinions based on obaervvations and instrunient readings. Other than this, no warranty z implied or mtended, EHSI is pleased to provide these industrial hygiene saarvices. Pleam do not hesitate to call us at (425) 455-2959 if you have any questions or conoems. Sincerely, Inter eet4l Inc. „a Clinton Holzhau hued M=obud Consultant (CMC) Ma Ages", it duality Services, ablCor, Ina A Professional Sarice Corporation in the Northwest May 15, 2006 Clinton HoWmm SHS Intaem ational Inc 13228 NE 200` St, Ste 100 B elievuae, WA g8Ofs5 RECEFI VSD Phone No: 425-456 29M Fax No, 425-W 7247 RAY Project Name: Joki Residence EHS INTERNA T! Pmojeot Number. 9113-01 P. 0. Number. Not available TIONAL ISE: Sampling Results for 060499 condft+s Enclosed please find results for samples submitted to our laboratory on May 10, 2006. A list of samples received follows. L.a Cor Sample NO, Client Swr4ft No. Sample Oescriptione vd"w4i Ol is -01 LR Fireplace Mote W04999.52 9195-02 Stairs - Mahon 060409.83 SM -03 8erernO t -E sill Abn 1/laNa 71ave Surfaces were saampled using clear adhesive tape. A portion of the tape was mounted on a slide and stained with lactophenol cotton blue. Chaaraacteristic morphologies were observed by optical miter soapy at a magnification of about 600x. biscdafter This test report relates only to the items tested in this report. Interpretation of these results Is the sole responsibiilty of the client. If further dwifim lon of these results is needed, please do not hesitate to call. Thank you for allowing the staff at L h Cor, Inc. the opportunity to provide you with analytical services. Sinc'e3mely,]� :791— JL John Haft, M.W.H. Barbara Relne, M.Sc. Laboratory nir r Scientist -Mycologist 7615 6th Avenue NW, Seattle, WA 98117 (206) 789-0155 (Office) (208) 7WS424 (Fax) Page 1 of 3 i {n Ul b. M a� 5 V j � ] j f § ■ ■ § � � � . § Joki Residence -24306 --90th Ave. W., Edmonds, WA PHOTOGRAPHIC LOG EHSI PROJECT #9113-01 PHOTO #1: Living Room west wall with fire place. PHOTO #2: Interior of residence. Shot taken from northeast bedroom towards southwest corner. Joki Residence -24306 -90th Ave. W., Edmonds, WA PHOTOGRAPHIC LOG EHSI PROJECT 49113-01 PHOTO #3: The entire roof deck was visible from below. PHOTO #4: Spotty brown mold growth on window frame. It was reported that all win- dows and window frames would be removed and replaced upon permission to proceed. Joki Residence -24306 -90th Ave. W., Edmonds, WA PHOTOGRAPHIC LOG EHSI PROJECT #9113-01 PHOTO #S: North wall of the northwest bedroom. Note the water staining on walls. The arrow indicates an area of roof deck with elevated moisture content. PHOTO #6: Area of the south wall in the southeast corner room. Note the condition of some of the wood in this area. 3oki Residence -2430090th Ave. W., Edmonds, WA EHSI PROJECT #9113-01 PHOTOGRAPHIC LOC, PHOTO #7: Red arrow indicates the location of moss growth. While this camera angle does not show the extent of the moss growth, it appears to be significant and is likely holding a considerable amount of moisture. PHOTO #S: The roof on the east wall near the southeast corner of the residence.